diff --git a/hooks/charmhelpers/__init__.py b/hooks/charmhelpers/__init__.py
index f72e7f84..48867880 100644
--- a/hooks/charmhelpers/__init__.py
+++ b/hooks/charmhelpers/__init__.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # Bootstrap charm-helpers, installing its dependencies if necessary using
 # only standard libraries.
diff --git a/hooks/charmhelpers/cli/__init__.py b/hooks/charmhelpers/cli/__init__.py
index 2d37ab31..389b490f 100644
--- a/hooks/charmhelpers/cli/__init__.py
+++ b/hooks/charmhelpers/cli/__init__.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import inspect
 import argparse
diff --git a/hooks/charmhelpers/cli/benchmark.py b/hooks/charmhelpers/cli/benchmark.py
index b23c16ce..303af14b 100644
--- a/hooks/charmhelpers/cli/benchmark.py
+++ b/hooks/charmhelpers/cli/benchmark.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from . import cmdline
 from charmhelpers.contrib.benchmark import Benchmark
diff --git a/hooks/charmhelpers/cli/commands.py b/hooks/charmhelpers/cli/commands.py
index 7e91db00..b9310565 100644
--- a/hooks/charmhelpers/cli/commands.py
+++ b/hooks/charmhelpers/cli/commands.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 """
 This module loads sub-modules into the python runtime so they can be
diff --git a/hooks/charmhelpers/cli/hookenv.py b/hooks/charmhelpers/cli/hookenv.py
index 265c816e..bd72f448 100644
--- a/hooks/charmhelpers/cli/hookenv.py
+++ b/hooks/charmhelpers/cli/hookenv.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from . import cmdline
 from charmhelpers.core import hookenv
diff --git a/hooks/charmhelpers/cli/host.py b/hooks/charmhelpers/cli/host.py
index 58e78d6b..40396849 100644
--- a/hooks/charmhelpers/cli/host.py
+++ b/hooks/charmhelpers/cli/host.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from . import cmdline
 from charmhelpers.core import host
diff --git a/hooks/charmhelpers/cli/unitdata.py b/hooks/charmhelpers/cli/unitdata.py
index d1cd95bf..c5728582 100644
--- a/hooks/charmhelpers/cli/unitdata.py
+++ b/hooks/charmhelpers/cli/unitdata.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from . import cmdline
 from charmhelpers.core import unitdata
diff --git a/hooks/charmhelpers/contrib/__init__.py b/hooks/charmhelpers/contrib/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/contrib/__init__.py
+++ b/hooks/charmhelpers/contrib/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/hahelpers/__init__.py b/hooks/charmhelpers/contrib/hahelpers/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/contrib/hahelpers/__init__.py
+++ b/hooks/charmhelpers/contrib/hahelpers/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/hahelpers/apache.py b/hooks/charmhelpers/contrib/hahelpers/apache.py
index 00917195..3313abac 100644
--- a/hooks/charmhelpers/contrib/hahelpers/apache.py
+++ b/hooks/charmhelpers/contrib/hahelpers/apache.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 #
 # Copyright 2012 Canonical Ltd.
diff --git a/hooks/charmhelpers/contrib/hahelpers/cluster.py b/hooks/charmhelpers/contrib/hahelpers/cluster.py
index 92325a96..e02350e0 100644
--- a/hooks/charmhelpers/contrib/hahelpers/cluster.py
+++ b/hooks/charmhelpers/contrib/hahelpers/cluster.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 #
 # Copyright 2012 Canonical Ltd.
@@ -280,14 +278,14 @@ def get_hacluster_config(exclude_keys=None):
     for initiating a relation to hacluster:
 
         ha-bindiface, ha-mcastport, vip, os-internal-hostname,
-        os-admin-hostname, os-public-hostname
+        os-admin-hostname, os-public-hostname, os-access-hostname
 
     param: exclude_keys: list of setting key(s) to be excluded.
     returns: dict: A dict containing settings keyed by setting name.
     raises: HAIncompleteConfig if settings are missing or incorrect.
     '''
     settings = ['ha-bindiface', 'ha-mcastport', 'vip', 'os-internal-hostname',
-                'os-admin-hostname', 'os-public-hostname']
+                'os-admin-hostname', 'os-public-hostname', 'os-access-hostname']
     conf = {}
     for setting in settings:
         if exclude_keys and setting in exclude_keys:
@@ -324,7 +322,7 @@ def valid_hacluster_config():
     # If dns-ha then one of os-*-hostname must be set
     if dns:
         dns_settings = ['os-internal-hostname', 'os-admin-hostname',
-                        'os-public-hostname']
+                        'os-public-hostname', 'os-access-hostname']
         # At this point it is unknown if one or all of the possible
         # network spaces are in HA. Validate at least one is set which is
         # the minimum required.
diff --git a/hooks/charmhelpers/contrib/network/__init__.py b/hooks/charmhelpers/contrib/network/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/contrib/network/__init__.py
+++ b/hooks/charmhelpers/contrib/network/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/network/ip.py b/hooks/charmhelpers/contrib/network/ip.py
index 99d78f2f..b5f457c7 100644
--- a/hooks/charmhelpers/contrib/network/ip.py
+++ b/hooks/charmhelpers/contrib/network/ip.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import glob
 import re
diff --git a/hooks/charmhelpers/contrib/network/ovs/__init__.py b/hooks/charmhelpers/contrib/network/ovs/__init__.py
index 83d18134..1bc68dcc 100644
--- a/hooks/charmhelpers/contrib/network/ovs/__init__.py
+++ b/hooks/charmhelpers/contrib/network/ovs/__init__.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 ''' Helpers for interacting with OpenvSwitch '''
 import subprocess
diff --git a/hooks/charmhelpers/contrib/openstack/__init__.py b/hooks/charmhelpers/contrib/openstack/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/contrib/openstack/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/openstack/alternatives.py b/hooks/charmhelpers/contrib/openstack/alternatives.py
index ef77caf3..1501641e 100644
--- a/hooks/charmhelpers/contrib/openstack/alternatives.py
+++ b/hooks/charmhelpers/contrib/openstack/alternatives.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 ''' Helper for managing alternatives for file conflict resolution '''
 
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/__init__.py b/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/deployment.py b/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
index 6b917d0c..f7220f35 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import logging
 import re
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/utils.py b/hooks/charmhelpers/contrib/openstack/amulet/utils.py
index ef3bdccf..8040b570 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/utils.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/utils.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import amulet
 import json
diff --git a/hooks/charmhelpers/contrib/openstack/context.py b/hooks/charmhelpers/contrib/openstack/context.py
index 5faa7eda..7cbdc03d 100644
--- a/hooks/charmhelpers/contrib/openstack/context.py
+++ b/hooks/charmhelpers/contrib/openstack/context.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import glob
 import json
@@ -1438,7 +1436,7 @@ class AppArmorContext(OSContextGenerator):
         :return ctxt: Dictionary of the apparmor profile or None
         """
         if config('aa-profile-mode') in ['disable', 'enforce', 'complain']:
-            ctxt = {'aa-profile-mode': config('aa-profile-mode')}
+            ctxt = {'aa_profile_mode': config('aa-profile-mode')}
         else:
             ctxt = None
         return ctxt
@@ -1482,10 +1480,10 @@ class AppArmorContext(OSContextGenerator):
             log("Not enabling apparmor Profile")
             return
         self.install_aa_utils()
-        cmd = ['aa-{}'.format(self.ctxt['aa-profile-mode'])]
-        cmd.append(self.ctxt['aa-profile'])
+        cmd = ['aa-{}'.format(self.ctxt['aa_profile_mode'])]
+        cmd.append(self.ctxt['aa_profile'])
         log("Setting up the apparmor profile for {} in {} mode."
-            "".format(self.ctxt['aa-profile'], self.ctxt['aa-profile-mode']))
+            "".format(self.ctxt['aa_profile'], self.ctxt['aa_profile_mode']))
         try:
             check_call(cmd)
         except CalledProcessError as e:
@@ -1494,12 +1492,12 @@ class AppArmorContext(OSContextGenerator):
             # apparmor is yet unaware of the profile and aa-disable aa-profile
             # fails. If aa-disable learns to read profile files first this can
             # be removed.
-            if self.ctxt['aa-profile-mode'] == 'disable':
+            if self.ctxt['aa_profile_mode'] == 'disable':
                 log("Manually disabling the apparmor profile for {}."
-                    "".format(self.ctxt['aa-profile']))
+                    "".format(self.ctxt['aa_profile']))
                 self.manually_disable_aa_profile()
                 return
             status_set('blocked', "Apparmor profile {} failed to be set to {}."
-                                  "".format(self.ctxt['aa-profile'],
-                                            self.ctxt['aa-profile-mode']))
+                                  "".format(self.ctxt['aa_profile'],
+                                            self.ctxt['aa_profile_mode']))
             raise e
diff --git a/hooks/charmhelpers/contrib/openstack/exceptions.py b/hooks/charmhelpers/contrib/openstack/exceptions.py
index ea4eb68e..f85ae4f4 100644
--- a/hooks/charmhelpers/contrib/openstack/exceptions.py
+++ b/hooks/charmhelpers/contrib/openstack/exceptions.py
@@ -1,3 +1,18 @@
+# Copyright 2016 Canonical Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 class OSContextError(Exception):
     """Raised when an error occurs during context generation.
 
diff --git a/hooks/charmhelpers/contrib/openstack/files/__init__.py b/hooks/charmhelpers/contrib/openstack/files/__init__.py
index 75876796..9df5f746 100644
--- a/hooks/charmhelpers/contrib/openstack/files/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/files/__init__.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # dummy __init__.py to fool syncer into thinking this is a syncable python
 # module
diff --git a/hooks/charmhelpers/contrib/openstack/ha/__init__.py b/hooks/charmhelpers/contrib/openstack/ha/__init__.py
index e69de29b..9b088de8 100644
--- a/hooks/charmhelpers/contrib/openstack/ha/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/ha/__init__.py
@@ -0,0 +1,13 @@
+# Copyright 2016 Canonical Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/openstack/ha/utils.py b/hooks/charmhelpers/contrib/openstack/ha/utils.py
index 34064237..1f5310bb 100644
--- a/hooks/charmhelpers/contrib/openstack/ha/utils.py
+++ b/hooks/charmhelpers/contrib/openstack/ha/utils.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2016 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 #
 # Copyright 2016 Canonical Ltd.
@@ -36,6 +34,10 @@ from charmhelpers.core.hookenv import (
     DEBUG,
 )
 
+from charmhelpers.core.host import (
+    lsb_release
+)
+
 from charmhelpers.contrib.openstack.ip import (
     resolve_address,
 )
@@ -63,8 +65,11 @@ def update_dns_ha_resource_params(resources, resource_params,
                     DNS HA
     """
 
+    # Validate the charm environment for DNS HA
+    assert_charm_supports_dns_ha()
+
     settings = ['os-admin-hostname', 'os-internal-hostname',
-                'os-public-hostname']
+                'os-public-hostname', 'os-access-hostname']
 
     # Check which DNS settings are set and update dictionaries
     hostname_group = []
@@ -109,3 +114,15 @@ def update_dns_ha_resource_params(resources, resource_params,
         msg = 'DNS HA: Hostname group has no members.'
         status_set('blocked', msg)
         raise DNSHAException(msg)
+
+
+def assert_charm_supports_dns_ha():
+    """Validate prerequisites for DNS HA
+    The MAAS client is only available on Xenial or greater
+    """
+    if lsb_release().get('DISTRIB_RELEASE') < '16.04':
+        msg = ('DNS HA is only supported on 16.04 and greater '
+               'versions of Ubuntu.')
+        status_set('blocked', msg)
+        raise DNSHAException(msg)
+    return True
diff --git a/hooks/charmhelpers/contrib/openstack/ip.py b/hooks/charmhelpers/contrib/openstack/ip.py
index 7875b997..0fd3ac25 100644
--- a/hooks/charmhelpers/contrib/openstack/ip.py
+++ b/hooks/charmhelpers/contrib/openstack/ip.py
@@ -1,19 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
-
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from charmhelpers.core.hookenv import (
     config,
diff --git a/hooks/charmhelpers/contrib/openstack/neutron.py b/hooks/charmhelpers/contrib/openstack/neutron.py
index d057ea6e..03427b49 100644
--- a/hooks/charmhelpers/contrib/openstack/neutron.py
+++ b/hooks/charmhelpers/contrib/openstack/neutron.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # Various utilies for dealing with Neutron and the renaming from Quantum.
 
diff --git a/hooks/charmhelpers/contrib/openstack/templates/__init__.py b/hooks/charmhelpers/contrib/openstack/templates/__init__.py
index 75876796..9df5f746 100644
--- a/hooks/charmhelpers/contrib/openstack/templates/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/templates/__init__.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # dummy __init__.py to fool syncer into thinking this is a syncable python
 # module
diff --git a/hooks/charmhelpers/contrib/openstack/templating.py b/hooks/charmhelpers/contrib/openstack/templating.py
index e5e3cb1b..89588951 100644
--- a/hooks/charmhelpers/contrib/openstack/templating.py
+++ b/hooks/charmhelpers/contrib/openstack/templating.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 
diff --git a/hooks/charmhelpers/contrib/openstack/utils.py b/hooks/charmhelpers/contrib/openstack/utils.py
index 8da5c5ed..f4401913 100644
--- a/hooks/charmhelpers/contrib/openstack/utils.py
+++ b/hooks/charmhelpers/contrib/openstack/utils.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # Common python helper functions used for OpenStack charms.
 from collections import OrderedDict
@@ -222,7 +220,6 @@ GIT_DEFAULT_REPOS = {
 }
 
 GIT_DEFAULT_BRANCHES = {
-    'icehouse': 'icehouse-eol',
     'kilo': 'stable/kilo',
     'liberty': 'stable/liberty',
     'mitaka': 'stable/mitaka',
@@ -743,12 +740,18 @@ def git_default_repos(projects_yaml):
             }
             repos = [repo]
 
+            # NOTE(coreycb): This is a temp work-around until the requirements
+            # repo moves from stable/kilo branch to kilo-eol tag. The core
+            # repos have already done this.
+            if default == 'kilo':
+                branch = 'kilo-eol'
+
             # neutron-* and nova-* charms require some additional repos
             if service in ['neutron-api', 'neutron-gateway',
                            'neutron-openvswitch']:
                 core_project = 'neutron'
                 for project in ['neutron-fwaas', 'neutron-lbaas',
-                                'neutron-vpnaas']:
+                                'neutron-vpnaas', 'nova']:
                     repo = {
                         'name': project,
                         'repository': GIT_DEFAULT_REPOS[project],
@@ -837,6 +840,7 @@ def git_clone_and_install(projects_yaml, core_project):
         pip_install(p, upgrade=True, proxy=http_proxy,
                     venv=os.path.join(parent_dir, 'venv'))
 
+    constraints = None
     for p in projects['repositories']:
         repo = p['repository']
         branch = p['branch']
@@ -848,10 +852,15 @@ def git_clone_and_install(projects_yaml, core_project):
                                                      parent_dir, http_proxy,
                                                      update_requirements=False)
             requirements_dir = repo_dir
+            constraints = os.path.join(repo_dir, "upper-constraints.txt")
+            # upper-constraints didn't exist until after icehouse
+            if not os.path.isfile(constraints):
+                constraints = None
         else:
             repo_dir = _git_clone_and_install_single(repo, branch, depth,
                                                      parent_dir, http_proxy,
-                                                     update_requirements=True)
+                                                     update_requirements=True,
+                                                     constraints=constraints)
 
     os.environ = old_environ
 
@@ -883,7 +892,7 @@ def _git_ensure_key_exists(key, keys):
 
 
 def _git_clone_and_install_single(repo, branch, depth, parent_dir, http_proxy,
-                                  update_requirements):
+                                  update_requirements, constraints=None):
     """
     Clone and install a single git repository.
     """
@@ -906,9 +915,10 @@ def _git_clone_and_install_single(repo, branch, depth, parent_dir, http_proxy,
 
     juju_log('Installing git repo from dir: {}'.format(repo_dir))
     if http_proxy:
-        pip_install(repo_dir, proxy=http_proxy, venv=venv)
+        pip_install(repo_dir, proxy=http_proxy, venv=venv,
+                    constraints=constraints)
     else:
-        pip_install(repo_dir, venv=venv)
+        pip_install(repo_dir, venv=venv, constraints=constraints)
 
     return repo_dir
 
@@ -988,6 +998,7 @@ def git_generate_systemd_init_files(templates_dir):
     script generation, which is used by the OpenStack packages.
     """
     for f in os.listdir(templates_dir):
+        # Create the init script and systemd unit file from the template
         if f.endswith(".init.in"):
             init_in_file = f
             init_file = f[:-8]
@@ -1013,10 +1024,47 @@ def git_generate_systemd_init_files(templates_dir):
                 os.remove(init_dest)
             if os.path.exists(service_dest):
                 os.remove(service_dest)
-            shutil.move(init_source, init_dest)
-            shutil.move(service_source, service_dest)
+            shutil.copyfile(init_source, init_dest)
+            shutil.copyfile(service_source, service_dest)
             os.chmod(init_dest, 0o755)
 
+    for f in os.listdir(templates_dir):
+        # If there's a service.in file, use it instead of the generated one
+        if f.endswith(".service.in"):
+            service_in_file = f
+            service_file = f[:-3]
+
+            service_in_source = os.path.join(templates_dir, service_in_file)
+            service_source = os.path.join(templates_dir, service_file)
+            service_dest = os.path.join('/lib/systemd/system', service_file)
+
+            shutil.copyfile(service_in_source, service_source)
+
+            if os.path.exists(service_dest):
+                os.remove(service_dest)
+            shutil.copyfile(service_source, service_dest)
+
+    for f in os.listdir(templates_dir):
+        # Generate the systemd unit if there's no existing .service.in
+        if f.endswith(".init.in"):
+            init_in_file = f
+            init_file = f[:-8]
+            service_in_file = "{}.service.in".format(init_file)
+            service_file = "{}.service".format(init_file)
+
+            init_in_source = os.path.join(templates_dir, init_in_file)
+            service_in_source = os.path.join(templates_dir, service_in_file)
+            service_source = os.path.join(templates_dir, service_file)
+            service_dest = os.path.join('/lib/systemd/system', service_file)
+
+            if not os.path.exists(service_in_source):
+                cmd = ['pkgos-gen-systemd-unit', init_in_source]
+                subprocess.check_call(cmd)
+
+                if os.path.exists(service_dest):
+                    os.remove(service_dest)
+                shutil.copyfile(service_source, service_dest)
+
 
 def os_workload_status(configs, required_interfaces, charm_func=None):
     """
diff --git a/hooks/charmhelpers/contrib/python/__init__.py b/hooks/charmhelpers/contrib/python/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/contrib/python/__init__.py
+++ b/hooks/charmhelpers/contrib/python/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/python/packages.py b/hooks/charmhelpers/contrib/python/packages.py
index a2411c37..e29bd1bb 100644
--- a/hooks/charmhelpers/contrib/python/packages.py
+++ b/hooks/charmhelpers/contrib/python/packages.py
@@ -3,19 +3,17 @@
 
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 import subprocess
@@ -80,7 +78,8 @@ def pip_install_requirements(requirements, constraints=None, **options):
     pip_execute(command)
 
 
-def pip_install(package, fatal=False, upgrade=False, venv=None, **options):
+def pip_install(package, fatal=False, upgrade=False, venv=None,
+                constraints=None, **options):
     """Install a python package"""
     if venv:
         venv_python = os.path.join(venv, 'bin/pip')
@@ -95,6 +94,9 @@ def pip_install(package, fatal=False, upgrade=False, venv=None, **options):
     if upgrade:
         command.append('--upgrade')
 
+    if constraints:
+        command.extend(['-c', constraints])
+
     if isinstance(package, list):
         command.extend(package)
     else:
diff --git a/hooks/charmhelpers/contrib/storage/__init__.py b/hooks/charmhelpers/contrib/storage/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/contrib/storage/__init__.py
+++ b/hooks/charmhelpers/contrib/storage/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/storage/linux/__init__.py b/hooks/charmhelpers/contrib/storage/linux/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/contrib/storage/linux/__init__.py
+++ b/hooks/charmhelpers/contrib/storage/linux/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/contrib/storage/linux/ceph.py b/hooks/charmhelpers/contrib/storage/linux/ceph.py
index b2484e78..8a9b9486 100644
--- a/hooks/charmhelpers/contrib/storage/linux/ceph.py
+++ b/hooks/charmhelpers/contrib/storage/linux/ceph.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 #
 # Copyright 2012 Canonical Ltd.
diff --git a/hooks/charmhelpers/contrib/storage/linux/loopback.py b/hooks/charmhelpers/contrib/storage/linux/loopback.py
index 3a3f5146..1d6ae6f0 100644
--- a/hooks/charmhelpers/contrib/storage/linux/loopback.py
+++ b/hooks/charmhelpers/contrib/storage/linux/loopback.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 import re
diff --git a/hooks/charmhelpers/contrib/storage/linux/lvm.py b/hooks/charmhelpers/contrib/storage/linux/lvm.py
index 34b5f71a..4719f53c 100644
--- a/hooks/charmhelpers/contrib/storage/linux/lvm.py
+++ b/hooks/charmhelpers/contrib/storage/linux/lvm.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from subprocess import (
     CalledProcessError,
diff --git a/hooks/charmhelpers/contrib/storage/linux/utils.py b/hooks/charmhelpers/contrib/storage/linux/utils.py
index 4e35c297..3dc0df68 100644
--- a/hooks/charmhelpers/contrib/storage/linux/utils.py
+++ b/hooks/charmhelpers/contrib/storage/linux/utils.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 import re
diff --git a/hooks/charmhelpers/core/__init__.py b/hooks/charmhelpers/core/__init__.py
index d1400a02..d7567b86 100644
--- a/hooks/charmhelpers/core/__init__.py
+++ b/hooks/charmhelpers/core/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/hooks/charmhelpers/core/decorators.py b/hooks/charmhelpers/core/decorators.py
index bb05620b..6ad41ee4 100644
--- a/hooks/charmhelpers/core/decorators.py
+++ b/hooks/charmhelpers/core/decorators.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 #
 # Copyright 2014 Canonical Ltd.
diff --git a/hooks/charmhelpers/core/files.py b/hooks/charmhelpers/core/files.py
index 0f12d321..fdd82b75 100644
--- a/hooks/charmhelpers/core/files.py
+++ b/hooks/charmhelpers/core/files.py
@@ -3,19 +3,17 @@
 
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 __author__ = 'Jorge Niedbalski <niedbalski@ubuntu.com>'
 
diff --git a/hooks/charmhelpers/core/fstab.py b/hooks/charmhelpers/core/fstab.py
index 3056fbac..d9fa9152 100644
--- a/hooks/charmhelpers/core/fstab.py
+++ b/hooks/charmhelpers/core/fstab.py
@@ -3,19 +3,17 @@
 
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import io
 import os
diff --git a/hooks/charmhelpers/core/hookenv.py b/hooks/charmhelpers/core/hookenv.py
index 01321296..48b2b9dc 100644
--- a/hooks/charmhelpers/core/hookenv.py
+++ b/hooks/charmhelpers/core/hookenv.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 "Interactions with the Juju environment"
 # Copyright 2013 Canonical Ltd.
@@ -1006,4 +1004,4 @@ def network_get_primary_address(binding):
     :raise: NotImplementedError if run on Juju < 2.0
     '''
     cmd = ['network-get', '--primary-address', binding]
-    return subprocess.check_output(cmd).strip()
+    return subprocess.check_output(cmd).decode('UTF-8').strip()
diff --git a/hooks/charmhelpers/core/host.py b/hooks/charmhelpers/core/host.py
index e367e450..35817b06 100644
--- a/hooks/charmhelpers/core/host.py
+++ b/hooks/charmhelpers/core/host.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 """Tools for working with the host system"""
 # Copyright 2012 Canonical Ltd.
diff --git a/hooks/charmhelpers/core/hugepage.py b/hooks/charmhelpers/core/hugepage.py
index a783ad94..54b5b5e2 100644
--- a/hooks/charmhelpers/core/hugepage.py
+++ b/hooks/charmhelpers/core/hugepage.py
@@ -2,19 +2,17 @@
 
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import yaml
 from charmhelpers.core import fstab
diff --git a/hooks/charmhelpers/core/kernel.py b/hooks/charmhelpers/core/kernel.py
index 5dc64952..b166efec 100644
--- a/hooks/charmhelpers/core/kernel.py
+++ b/hooks/charmhelpers/core/kernel.py
@@ -3,19 +3,17 @@
 
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 __author__ = "Jorge Niedbalski <jorge.niedbalski@canonical.com>"
 
diff --git a/hooks/charmhelpers/core/services/__init__.py b/hooks/charmhelpers/core/services/__init__.py
index 0928158b..61fd074e 100644
--- a/hooks/charmhelpers/core/services/__init__.py
+++ b/hooks/charmhelpers/core/services/__init__.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from .base import *  # NOQA
 from .helpers import *  # NOQA
diff --git a/hooks/charmhelpers/core/services/base.py b/hooks/charmhelpers/core/services/base.py
index a42660ca..ca9dc996 100644
--- a/hooks/charmhelpers/core/services/base.py
+++ b/hooks/charmhelpers/core/services/base.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 import json
diff --git a/hooks/charmhelpers/core/services/helpers.py b/hooks/charmhelpers/core/services/helpers.py
index 24237042..3e6e30d2 100644
--- a/hooks/charmhelpers/core/services/helpers.py
+++ b/hooks/charmhelpers/core/services/helpers.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 import yaml
diff --git a/hooks/charmhelpers/core/strutils.py b/hooks/charmhelpers/core/strutils.py
index 7e3f9693..dd9b9717 100644
--- a/hooks/charmhelpers/core/strutils.py
+++ b/hooks/charmhelpers/core/strutils.py
@@ -3,19 +3,17 @@
 
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import six
 import re
diff --git a/hooks/charmhelpers/core/sysctl.py b/hooks/charmhelpers/core/sysctl.py
index 21cc8ab2..6e413e31 100644
--- a/hooks/charmhelpers/core/sysctl.py
+++ b/hooks/charmhelpers/core/sysctl.py
@@ -3,19 +3,17 @@
 
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import yaml
 
diff --git a/hooks/charmhelpers/core/templating.py b/hooks/charmhelpers/core/templating.py
index d2d8eafe..0a7560ff 100644
--- a/hooks/charmhelpers/core/templating.py
+++ b/hooks/charmhelpers/core/templating.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 
diff --git a/hooks/charmhelpers/core/unitdata.py b/hooks/charmhelpers/core/unitdata.py
index 338104e0..54ec969f 100644
--- a/hooks/charmhelpers/core/unitdata.py
+++ b/hooks/charmhelpers/core/unitdata.py
@@ -3,20 +3,17 @@
 #
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
-#
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 #
 # Authors:
 #  Kapil Thangavelu <kapil.foss@gmail.com>
diff --git a/hooks/charmhelpers/fetch/__init__.py b/hooks/charmhelpers/fetch/__init__.py
index 68b0f94d..8f39f2fe 100644
--- a/hooks/charmhelpers/fetch/__init__.py
+++ b/hooks/charmhelpers/fetch/__init__.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import importlib
 from tempfile import NamedTemporaryFile
diff --git a/hooks/charmhelpers/fetch/archiveurl.py b/hooks/charmhelpers/fetch/archiveurl.py
index b8e0943d..dd24f9ec 100644
--- a/hooks/charmhelpers/fetch/archiveurl.py
+++ b/hooks/charmhelpers/fetch/archiveurl.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 import hashlib
diff --git a/hooks/charmhelpers/fetch/bzrurl.py b/hooks/charmhelpers/fetch/bzrurl.py
index b743753e..b3404d85 100644
--- a/hooks/charmhelpers/fetch/bzrurl.py
+++ b/hooks/charmhelpers/fetch/bzrurl.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 from subprocess import check_call
diff --git a/hooks/charmhelpers/fetch/giturl.py b/hooks/charmhelpers/fetch/giturl.py
index 65ed5319..f708d1ee 100644
--- a/hooks/charmhelpers/fetch/giturl.py
+++ b/hooks/charmhelpers/fetch/giturl.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 from subprocess import check_call, CalledProcessError
diff --git a/hooks/charmhelpers/payload/__init__.py b/hooks/charmhelpers/payload/__init__.py
index e6f42497..ee55cb3d 100644
--- a/hooks/charmhelpers/payload/__init__.py
+++ b/hooks/charmhelpers/payload/__init__.py
@@ -1,17 +1,15 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 "Tools for working with files injected into a charm just before deployment."
diff --git a/hooks/charmhelpers/payload/archive.py b/hooks/charmhelpers/payload/archive.py
index 5aaf13e2..7fc453f5 100644
--- a/hooks/charmhelpers/payload/archive.py
+++ b/hooks/charmhelpers/payload/archive.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 import tarfile
diff --git a/hooks/charmhelpers/payload/execd.py b/hooks/charmhelpers/payload/execd.py
index 4d4d81a6..0c42090f 100644
--- a/hooks/charmhelpers/payload/execd.py
+++ b/hooks/charmhelpers/payload/execd.py
@@ -2,19 +2,17 @@
 
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import os
 import sys
diff --git a/tests/charmhelpers/__init__.py b/tests/charmhelpers/__init__.py
index f72e7f84..48867880 100644
--- a/tests/charmhelpers/__init__.py
+++ b/tests/charmhelpers/__init__.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 # Bootstrap charm-helpers, installing its dependencies if necessary using
 # only standard libraries.
diff --git a/tests/charmhelpers/contrib/__init__.py b/tests/charmhelpers/contrib/__init__.py
index d1400a02..d7567b86 100644
--- a/tests/charmhelpers/contrib/__init__.py
+++ b/tests/charmhelpers/contrib/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/tests/charmhelpers/contrib/amulet/__init__.py b/tests/charmhelpers/contrib/amulet/__init__.py
index d1400a02..d7567b86 100644
--- a/tests/charmhelpers/contrib/amulet/__init__.py
+++ b/tests/charmhelpers/contrib/amulet/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/tests/charmhelpers/contrib/amulet/deployment.py b/tests/charmhelpers/contrib/amulet/deployment.py
index d451698d..0146236d 100644
--- a/tests/charmhelpers/contrib/amulet/deployment.py
+++ b/tests/charmhelpers/contrib/amulet/deployment.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import amulet
 import os
diff --git a/tests/charmhelpers/contrib/amulet/utils.py b/tests/charmhelpers/contrib/amulet/utils.py
index 7e5c25a9..a39ed4c8 100644
--- a/tests/charmhelpers/contrib/amulet/utils.py
+++ b/tests/charmhelpers/contrib/amulet/utils.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import io
 import json
diff --git a/tests/charmhelpers/contrib/openstack/__init__.py b/tests/charmhelpers/contrib/openstack/__init__.py
index d1400a02..d7567b86 100644
--- a/tests/charmhelpers/contrib/openstack/__init__.py
+++ b/tests/charmhelpers/contrib/openstack/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/tests/charmhelpers/contrib/openstack/amulet/__init__.py b/tests/charmhelpers/contrib/openstack/amulet/__init__.py
index d1400a02..d7567b86 100644
--- a/tests/charmhelpers/contrib/openstack/amulet/__init__.py
+++ b/tests/charmhelpers/contrib/openstack/amulet/__init__.py
@@ -1,15 +1,13 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
diff --git a/tests/charmhelpers/contrib/openstack/amulet/deployment.py b/tests/charmhelpers/contrib/openstack/amulet/deployment.py
index 6b917d0c..f7220f35 100644
--- a/tests/charmhelpers/contrib/openstack/amulet/deployment.py
+++ b/tests/charmhelpers/contrib/openstack/amulet/deployment.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import logging
 import re
diff --git a/tests/charmhelpers/contrib/openstack/amulet/utils.py b/tests/charmhelpers/contrib/openstack/amulet/utils.py
index ef3bdccf..8040b570 100644
--- a/tests/charmhelpers/contrib/openstack/amulet/utils.py
+++ b/tests/charmhelpers/contrib/openstack/amulet/utils.py
@@ -1,18 +1,16 @@
 # Copyright 2014-2015 Canonical Limited.
 #
-# This file is part of charm-helpers.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-# charm-helpers is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License version 3 as
-# published by the Free Software Foundation.
+#  http://www.apache.org/licenses/LICENSE-2.0
 #
-# charm-helpers is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 import amulet
 import json