Version specific install of packages enabled

config.yaml

@@ -25,3 +25,13 @@ options:
     default: null
     type: string
     description: Provide the respective keys of the install sources
+  plumgrid-build:
+    default: 'latest'
+    type: string
+    description: |
+       Provide the build version of PLUMgrid packages that needs to be installed
+  iovisor-build:
+    default: 'latest'
+    type: string
+    description: |
+       Provide the build version of iovisor package that needs to be installed

hooks/charmhelpers/contrib/openstack/neutron.py

@@ -204,8 +204,8 @@ def neutron_plugins():
                                         database=config('database'),
                                         ssl_dir=NEUTRON_CONF_DIR)],
             'services': [],
-            'packages': [['plumgrid-lxc'],
-                         ['iovisor-dkms']],
+            'packages': ['plumgrid-lxc',
+                         'iovisor-dkms'],
             'server_packages': ['neutron-server',
                                 'neutron-plugin-plumgrid'],
             'server_services': ['neutron-server']

hooks/pg_gw_utils.py

@@ -19,6 +19,9 @@ from charmhelpers.core.host import (
     service_start,
     service_stop,
 )
+from charmhelpers.fetch import (
+    apt_cache
+)
 from charmhelpers.contrib.storage.linux.ceph import modprobe
 from charmhelpers.core.host import set_nic_mtu
 from charmhelpers.contrib.openstack import templating
@@ -71,7 +74,25 @@ def determine_packages():
     Returns list of packages required by PLUMgrid Gateway as specified
     in the neutron_plugins dictionary in charmhelpers.
     '''
-    return neutron_plugin_attribute('plumgrid', 'packages', 'neutron')
+    pkgs = []
+    tag = 'latest'
+    for pkg in neutron_plugin_attribute('plumgrid', 'packages', 'neutron'):
+        if 'plumgrid' in pkg:
+            tag = config('plumgrid-build')
+        elif pkg == 'iovisor-dkms':
+            tag = config('iovisor-build')
+
+        if tag == 'latest':
+            pkgs.append(pkg)
+        else:
+            if tag in [i.ver_str for i in apt_cache()[pkg].version_list]:
+                pkgs.append('%s=%s' % (pkg, tag))
+            else:
+                error_msg = \
+                    "Build version '%s' for package '%s' not available" \
+                    % (tag, pkg)
+                raise ValueError(error_msg)
+    return pkgs
 
 
 def register_configs(release=None):