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.tox
.stestr
*__pycache__*
*.pyc
build
.unit-state.db
*.swp

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[DEFAULT]
test_path=./unit_tests
top_dir=./

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# Overview
This repository contains a set of similar interfaces with common code broken
out to a separate module.
This interface facilitates a provider charm to publish connection properties
of a OVSDB and a requirer charm to consume a remote OVSDB.
# Usage
No explicit handler is required to consume this interface in charms
that consume this interface.
In addittion to the states automatically set based on relation data by
``charms.reactive.Endpoint``, the interface provides the
``ovsdb.available`` state.
# metadata
To consume this interface in your charm or layer, add the following to `layer.yaml`:
```yaml
includes: ['interface:ovsdb']
```
and add a provider or requires interface of type `ovsdb` to your charm or
layers `metadata.yaml`:
```yaml
requires:
ovsdb:
interface: ovsdb
```
# Bugs
Please report bugs on [Launchpad](https://bugs.launchpad.net/openstack-charms/+filebug).
For development questions please refer to the OpenStack [Charm Guide](https://github.com/openstack/charm-guide).

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The python modules kept in this directory contain code shared among the
individual interfaces distributed as part of this repository.
> **Note**: Do not use the ``charms.reactive`` decorators that take flags
as arguments to wrap functions or methods in the shared files. Consume
the shared code from the interface specific files and declare which flags
to react to there.

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# Copyright 2019 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.

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# Copyright 2019 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.
# NOTE: Do not use the ``charms.reactive`` decorators that take flags
# as arguments to wrap functions or methods in this shared library.
#
# Consume the shared code from the interface specific files and declare
# which flags to react to there.
import inspect
import ipaddress
import charmhelpers.core as ch_core
import charms.reactive as reactive
class OVSDB(reactive.Endpoint):
@property
def cluster_local_addr(self):
for relation in self.relations:
ng_data = ch_core.hookenv.network_get(
self.expand_name('{endpoint_name}'),
relation_id=relation.relation_id)
for interface in ng_data.get('bind-addresses', []):
for addr in interface.get('addresses', []):
return addr['address']
@property
def cluster_addrs(self):
for relation in self.relations:
for unit in relation.units:
try:
addr = ipaddress.ip_address(
unit.received.get('bound-address', ''))
except ValueError:
continue
if isinstance(addr, ipaddress.IPv6Address):
yield '[{}]'.format(addr)
else:
yield '{}'.format(addr)
def expected_peers_available(self):
if len(self.all_joined_units) == len(
list(ch_core.hookenv.expected_peer_units())):
for relation in self.relations:
for unit in relation.units:
if not unit.received.get('bound-address'):
break
else:
continue
break
else:
return True
return False
def publish_cluster_local_addr(self):
"""Announce the address we bound our OVSDB Servers to.
This will be used by our peers and clients to build a connection
string to the remote cluster.
"""
for relation in self.relations:
relation.to_publish['bound-address'] = self.cluster_local_addr
def joined(self):
ch_core.hookenv.log('{}: {} -> {}'
.format(self._endpoint_name,
type(self).__name__,
inspect.currentframe().f_code.co_name),
level=ch_core.hookenv.INFO)
reactive.set_flag(self.expand_name('{endpoint_name}.connected'))
self.publish_cluster_local_addr()
if self.expected_peers_available:
reactive.set_flag(self.expand_name('{endpoint_name}.available'))
def broken(self):
reactive.clear_flag(self.expand_name('{endpoint_name}.available'))
reactive.clear_flag(self.expand_name('{endpoint_name}.connected'))

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name: ovsdb-cluster
summary: Interface for OVSDB
maintainer: OpenStack Charmers <openstack-charmers@lists.ubuntu.com>
repo: https://github.com/openstack-charmers/charm-interface-ovsdb.git
ignore:
- 'unit_tests'
- '.stestr.conf'
- 'test-requirements.txt'
- 'tox.ini'
- '.gitignore'
- '.travis.yml'

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../lib/

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# Copyright 2018 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.
# the reactive framework unfortunately does not grok `import as` in conjunction
# with decorators on class instance methods, so we have to revert to `from ...`
# imports
from charms.reactive import (
when,
)
from .lib import ovsdb as ovsdb
class OVSDBClusterPeer(ovsdb.OVSDB):
@when('endpoint.{endpoint_name}.joined')
def joined(self):
super().joined()
@when('endpoint.{endpoint_name}.broken')
def broken(self):
super().broken()

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# Copyright 2018 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.
# the reactive framework unfortunately does not grok `import as` in conjunction
# with decorators on class instance methods, so we have to revert to `from ...`
# imports
import inspect
import charmhelpers.core as ch_core
from charms.reactive import (
when,
)
from .lib import ovsdb as ovsdb
class OVSDBClusterProvides(ovsdb.OVSDB):
@when('endpoint.{endpoint_name}.joined')
def joined(self):
ch_core.hookenv.log('{}: {} -> {}'
.format(self._endpoint_name,
type(self).__name__,
inspect.currentframe().f_code.co_name),
level=ch_core.hookenv.INFO)
@when('endpoint.{endpoint_name}.broken')
def broken(self):
super().broken()

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# Copyright 2018 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.
import inspect
import charmhelpers.core as ch_core
# the reactive framework unfortunately does not grok `import as` in conjunction
# with decorators on class instance methods, so we have to revert to `from ...`
# imports
from charms.reactive import (
when,
)
from .lib import ovsdb as ovsdb
class OVSDBClusterRequires(ovsdb.OVSDB):
@when('endpoint.{endpoint_name}.joined')
def joined(self):
ch_core.hookenv.log('{}: {} -> {}'
.format(self._endpoint_name,
type(self).__name__,
inspect.currentframe().f_code.co_name),
level=ch_core.hookenv.INFO)
@when('endpoint.{endpoint_name}.broken')
def broken(self):
super().broken()

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name: ovsdb-cms
summary: Interface for OVSDB
maintainer: OpenStack Charmers <openstack-charmers@lists.ubuntu.com>
repo: https://github.com/openstack-charmers/charm-interface-ovsdb.git
ignore:
- 'unit_tests'
- '.stestr.conf'
- 'test-requirements.txt'
- 'tox.ini'
- '.gitignore'
- '.travis.yml'

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../lib

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# Copyright 2018 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.
# the reactive framework unfortunately does not grok `import as` in conjunction
# with decorators on class instance methods, so we have to revert to `from ...`
# imports
import inspect
import charmhelpers.core as ch_core
from charms.reactive import (
when,
)
from .lib import ovsdb as ovsdb
class OVSDBCMSProvides(ovsdb.OVSDB):
@when('endpoint.{endpoint_name}.joined')
def joined(self):
ch_core.hookenv.log('{}: {} -> {}'
.format(self._endpoint_name,
type(self).__name__,
inspect.currentframe().f_code.co_name),
level=ch_core.hookenv.INFO)
@when('endpoint.{endpoint_name}.broken')
def broken(self):
super().broken()

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# Copyright 2018 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.
# the reactive framework unfortunately does not grok `import as` in conjunction
# with decorators on class instance methods, so we have to revert to `from ...`
# imports
import inspect
import charmhelpers.core as ch_core
from charms.reactive import (
when,
)
from .lib import ovsdb as ovsdb
class OVSDBCMSRequires(ovsdb.OVSDB):
@when('endpoint.{endpoint_name}.joined')
def joined(self):
ch_core.hookenv.log('{}: {} -> {}'
.format(self._endpoint_name,
type(self).__name__,
inspect.currentframe().f_code.co_name),
level=ch_core.hookenv.INFO)
@when('endpoint.{endpoint_name}.broken')
def broken(self):
super().broken()

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name: ovsdb
summary: Interface for OVSDB
maintainer: OpenStack Charmers <openstack-charmers@lists.ubuntu.com>
repo: https://github.com/openstack-charmers/charm-interface-ovsdb.git
ignore:
- 'unit_tests'
- '.stestr.conf'
- 'test-requirements.txt'
- 'tox.ini'
- '.gitignore'
- '.travis.yml'

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../lib

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# Copyright 2018 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.
# the reactive framework unfortunately does not grok `import as` in conjunction
# with decorators on class instance methods, so we have to revert to `from ...`
# imports
import inspect
import charmhelpers.core as ch_core
from charms.reactive import (
when,
)
from .lib import ovsdb as ovsdb
class OVSDBProvides(ovsdb.OVSDB):
@when('endpoint.{endpoint_name}.joined')
def joined(self):
ch_core.hookenv.log('{}: {} -> {}'
.format(self._endpoint_name,
type(self).__name__,
inspect.currentframe().f_code.co_name),
level=ch_core.hookenv.INFO)
@when('endpoint.{endpoint_name}.broken')
def broken(self):
super().broken()

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# Copyright 2018 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.
# the reactive framework unfortunately does not grok `import as` in conjunction
# with decorators on class instance methods, so we have to revert to `from ...`
# imports
import inspect
import charmhelpers.core as ch_core
from charms.reactive import (
when,
)
from .lib import ovsdb as ovsdb
class OVSDBRequires(ovsdb.OVSDB):
@when('endpoint.{endpoint_name}.joined')
def joined(self):
ch_core.hookenv.log('{}: {} -> {}'
.format(self._endpoint_name,
type(self).__name__,
inspect.currentframe().f_code.co_name),
level=ch_core.hookenv.INFO)
@when('endpoint.{endpoint_name}.broken')
def broken(self):
super().broken()

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# Lint and unit test requirements
flake8
os-testr>=0.4.1
charms.reactive
mock>=1.2
coverage>=3.6
git+https://github.com/openstack/charms.openstack.git#egg=charms.openstack

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[tox]
skipsdist = True
envlist = pep8,py3
skip_missing_interpreters = True
[testenv]
setenv = VIRTUAL_ENV={envdir}
PYTHONHASHSEED=0
TERM=linux
install_command =
pip install {opts} {packages}
[testenv:py3]
basepython = python3
deps = -r{toxinidir}/test-requirements.txt
commands = ostestr {posargs}
[testenv:py35]
basepython = python3.5
deps = -r{toxinidir}/test-requirements.txt
commands = ostestr {posargs}
[testenv:py36]
basepython = python3.6
deps = -r{toxinidir}/test-requirements.txt
commands = ostestr {posargs}
[testenv:pep8]
basepython = python3
deps = -r{toxinidir}/test-requirements.txt
commands = flake8 {posargs}
[testenv:venv]
commands = {posargs}
[flake8]
# E402 ignore necessary for path append before sys module import in actions
ignore = E402

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# Copyright 2018 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.
import sys
sys.path.append('src')
sys.path.append('src/lib')
# Mock out charmhelpers so that we can test without it.
import charms_openstack.test_mocks # noqa
charms_openstack.test_mocks.mock_charmhelpers()

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# Copyright 2019 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.
import mock
from lib import ovsdb
import charms_openstack.test_utils as test_utils
_hook_args = {}
class TestNeutronLoadBalancerRequires(test_utils.PatchHelper):
def setUp(self):
super().setUp()
self.target = ovsdb.OVSDB('some-relation', [])
self._patches = {}
self._patches_start = {}
def tearDown(self):
self.target = None
for k, v in self._patches.items():
v.stop()
setattr(self, k, None)
self._patches = None
self._patches_start = None
def patch_target(self, attr, return_value=None):
mocked = mock.patch.object(self.target, attr)
self._patches[attr] = mocked
started = mocked.start()
started.return_value = return_value
self._patches_start[attr] = started
setattr(self, attr, started)
def patch_topublish(self):
self.patch_target('_relations')
relation = mock.MagicMock()
to_publish = mock.PropertyMock()
type(relation).to_publish = to_publish
self._relations.__iter__.return_value = [relation]
return relation.to_publish
def test_cluster_local_addr(self):
relation = mock.MagicMock()
relation.relation_id = 'some-endpoint:42'
self.patch_target('_relations')
self._relations.__iter__.return_value = [relation]
self.patch_target('expand_name')
self.expand_name.return_value = 'some-relation'
self.patch_object(ovsdb.ch_core.hookenv, 'network_get')
self.network_get.return_value = {
'bind-addresses': [
{
'macaddress': '',
'interfacename': '',
'addresses': [
{
'hostname': '',
'address': '42.42.42.42',
'cidr': ''
},
],
},
],
'egress-subnets': ['42.42.42.42/32'],
'ingress-addresses': ['42.42.42.42'],
}
self.assertEquals(self.target.cluster_local_addr, '42.42.42.42')
self.network_get.assert_called_once_with(
'some-relation', relation_id='some-endpoint:42')
def test_cluster_addrs(self):
def _assert_generator(iterable, expect):
for value in iterable:
self.assertEquals(value, expect)
relation = mock.MagicMock()
relation.relation_id = 'some-endpoint:42'
unit = mock.MagicMock()
relation.units.__iter__.return_value = [unit]
self.patch_target('_relations')
self._relations.__iter__.return_value = [relation]
unit.received.get.return_value = '127.0.0.1'
_assert_generator(self.target.cluster_addrs, '127.0.0.1')
unit.received.get.assert_called_once_with('bound-address', '')
unit.received.get.return_value = '::1'
_assert_generator(self.target.cluster_addrs, '[::1]')
def test_expected_peers_available(self):
# self.patch_target('_all_joined_units')
self.patch_object(ovsdb.ch_core.hookenv, 'expected_peer_units')
self.patch_target('_relations')
self.target._all_joined_units = ['aFakeUnit']
self.expected_peer_units.return_value = ['aFakeUnit']
relation = mock.MagicMock()
unit = mock.MagicMock()
relation.units.__iter__.return_value = [unit]
self._relations.__iter__.return_value = [relation]
unit.received.get.return_value = '127.0.0.1'
self.assertTrue(self.target.expected_peers_available())
unit.received.get.assert_called_once_with('bound-address')
unit.received.get.return_value = ''
self.assertFalse(self.target.expected_peers_available())
self.expected_peer_units.return_value = ['firstFakeUnit',
'secondFakeUnit']
unit.received.get.return_value = '127.0.0.1'
self.assertFalse(self.target.expected_peers_available())
def test_publish_cluster_local_addr(self):
to_publish = self.patch_topublish()
self.target.publish_cluster_local_addr()
to_publish.__setitem__.assert_called_once_with('bound-address', None)
def test_joined(self):
self.patch_object(ovsdb.reactive, 'set_flag')
self.patch_target('publish_cluster_local_addr')
self.patch_target('expected_peers_available')
self.expected_peers_available.__bool__.return_value = False
self.target.joined()
self.expected_peers_available.__bool__.assert_called_once_with()
self.set_flag.assert_called_once_with('some-relation.connected')
self.publish_cluster_local_addr.assert_called_once_with()
self.set_flag.reset_mock()
self.expected_peers_available.__bool__.return_value = True
self.target.joined()
self.set_flag.assert_has_calls([
mock.call('some-relation.connected'),
mock.call('some-relation.available'),
])
def test_broken(self):
self.patch_object(ovsdb.reactive, 'clear_flag')
self.target.broken()
self.clear_flag.assert_has_calls([
mock.call('some-relation.available'),
mock.call('some-relation.connected'),
])