Print DNS commands when launching a node.

Still not automatic, but much less typing.

Change-Id: I348b866db3f2778ba08a516a00d258358c4a9129
Reviewed-on: https://review.openstack.org/22468
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins

launch/README

@@ -46,29 +46,13 @@ above.
 Add DNS Records
 ===============
 
-There are no scripts to handle DNS at the moment due to a lack of
+There are no scripts to automatically handle DNS at the moment due to
-library support for the new Rackspace Cloud DNS (with IPv6).  To
+a lack of library support for the new Rackspace Cloud DNS (with IPv6).
-manually update DNS, you will need the hostname, v4 and v6 addresses
+However, the launch-node script will print the commands needed to be
-of the host, as well as the UUID (these can all be found by running
+run to configure DNS for a newly launched server.  To see the commands
-the ''nova list'' command).  The environment variables used in the
+for an existing server, run:
-URL should be satisfied by sourcing the "openstackci-rs-nova.sh"
-script (or jenkins, as appropriate). Also the above launch script
-should output some environment variable assignments for UUID, IPV4
-and IPV6 you can cut and paste as needed, or you can fill them in
-yourself::
 
-  . ~root/rackdns-venv/bin/activate
+  ./dns.py $FQDN
-
-  UUID=01234567-89ab-cdef-fedc-ba9876543210
-  IPV4=123.45.67.89
-  IPV6=fedc:ba98:7654:3210:dead:beef:cafe:feed
-
-  rackdns rdns-create --name $FQDN --data "$IPV6" --server-href https://$os_region_name.servers.api.rackspacecloud.com/v2/$OS_TENANT_NAME/servers/"$UUID" --ttl 300
-  rackdns rdns-create --name $FQDN --data "$IPV4" --server-href https://$os_region_name.servers.api.rackspacecloud.com/v2/$OS_TENANT_NAME/servers/"$UUID" --ttl 300
-
-  . ~root/ci-launch/openstack-rs-nova.sh
-  rackdns record-create --name $FQDN --type AAAA --data "$IPV6" --ttl 300 openstack.org
-  rackdns record-create --name $FQDN --type A --data "$IPV4" --ttl 300 openstack.org
 
 Activate Puppet Agent
 =====================

launch/dns.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python
+
+# Launch a new OpenStack project infrastructure node.
+
+# Copyright (C) 2013 OpenStack Foundation
+#
+# 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
+import os
+import commands
+import time
+import subprocess
+import traceback
+import socket
+import argparse
+import utils
+
+NOVA_USERNAME=os.environ['OS_USERNAME']
+NOVA_PASSWORD=os.environ['OS_PASSWORD']
+NOVA_URL=os.environ['OS_AUTH_URL']
+NOVA_PROJECT_ID=os.environ['OS_TENANT_NAME']
+NOVA_REGION_NAME=os.environ['OS_REGION_NAME']
+
+SCRIPT_DIR = os.path.dirname(sys.argv[0])
+
+def get_client():
+    args = [NOVA_USERNAME, NOVA_PASSWORD, NOVA_PROJECT_ID, NOVA_URL]
+    kwargs = {}
+    kwargs['region_name'] = NOVA_REGION_NAME
+    kwargs['service_type'] = 'compute'
+    from novaclient.v1_1.client import Client
+    client = Client(*args, **kwargs)
+    return client
+
+def print_dns(client, name):
+    for server in client.servers.list():
+        if server.name != name: continue
+        ip4 = utils.get_public_ip(server)
+        ip6 = utils.get_public_ip(server, 6)
+        href = utils.get_href(server)
+
+        print
+        print "Run the following commands to set up DNS:"
+        print
+        print ". ~root/rackdns-venv/bin/activate"
+        print
+        print ("rackdns rdns-create --name %s \\\n"
+               "    --data %s \\\n"
+               "    --server-href %s \\\n"
+               "    --ttl 3600" % (
+                server.name, ip6, href))
+        print
+        print ("rackdns rdns-create --name %s \\\n"
+               "    --data %s \\\n"
+               "    --server-href %s \\\n"
+               "    --ttl 3600" % (
+                server.name, ip4, href))
+        print
+        print ". ~root/ci-launch/openstack-rs-nova.sh"
+        print
+        print ("rackdns record-create --name %s \\\n"
+               "    --type AAAA --data %s \\\n"
+               "    --ttl 3600 openstack.org" % (
+                server.name, ip6))
+        print
+        print ("rackdns record-create --name %s \\\n"
+               "    --type A --data %s \\\n"
+               "    --ttl 3600 openstack.org" % (
+                server.name, ip4))
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("name", help="server name")
+    options = parser.parse_args()
+
+    client = get_client()
+    print_dns(client, options.name)
+
+if __name__ == '__main__':
+    main()

launch/launch-node.py

@@ -27,6 +27,7 @@ import traceback
 import socket
 import argparse
 import utils
+import dns
 
 NOVA_USERNAME=os.environ['OS_USERNAME']
 NOVA_PASSWORD=os.environ['OS_PASSWORD']
@@ -142,7 +143,6 @@ def build_server(client, name, image, flavor, cert, environment):
         # Raise the important exception that started this
         raise
 
-
 def main():
     parser = argparse.ArgumentParser()
     parser.add_argument("name", help="server name")
@@ -196,6 +196,7 @@ def main():
     print "Found image", image
 
     build_server(client, options.name, image, flavor, cert, options.environment)
+    dns.print_dns(client, options.name)
 
 if __name__ == '__main__':
     main()

launch/utils.py

@@ -84,14 +84,9 @@ def get_flavor(client, min_ram):
 
 def get_public_ip(server, version=4):
     if 'os-floating-ips' in get_extensions(server.manager.api):
-        print 'using floating ips'
         for addr in server.manager.api.floating_ips.list():
-            print 'checking addr', addr
             if addr.instance_id == server.id:
-                print 'found addr', addr
                 return addr.ip
-    print 'no floating ip, addresses:'
-    print server.addresses
     for addr in server.addresses.get('public', []):
         if type(addr) == type(u''): # Rackspace/openstack 1.0
             return addr
@@ -102,9 +97,13 @@ def get_public_ip(server, version=4):
             return addr['addr']
     return None
 
+def get_href(server):
+    for link in server.links:
+        if link['rel'] == 'self':
+            return link['href']
+
 def add_public_ip(server):
     ip = server.manager.api.floating_ips.create()
-    print "created floating ip", ip
     server.add_floating_ip(ip)
     for count in iterate_timeout(600, "ip to be added"):
         try: