Configured plumgrid install sources

hooks/neutron_plumgrid_hooks.py

@@ -32,6 +32,7 @@ from neutron_plumgrid_utils import (
     restart_map,
     ensure_files,
     set_neutron_relation,
+    configure_pg_sources
 )
 
 hooks = Hooks()
@@ -65,6 +66,9 @@ def config_changed():
         charm_config.changed('plumgrid-build') or
             charm_config.changed('install_keys')):
         status_set('maintenance', 'Upgrading apt packages')
+        if charm_config.changed('install_sources'):
+            if not configure_pg_sources():
+                log('IOError: /etc/apt/sources.list couldn\'t be updated')
         configure_sources()
         apt_update()
         pkgs = determine_packages()

hooks/neutron_plumgrid_utils.py

@@ -31,7 +31,7 @@ PG_PACKAGES = [
 ]
 
 NEUTRON_CONF_DIR = "/etc/neutron"
-
+SOURCES_LIST = '/etc/apt/sources.list'
 SU_FILE = '/etc/sudoers.d/neutron_sudoers'
 PLUMGRID_CONF = '%s/plugins/plumgrid/plumgrid.ini' % NEUTRON_CONF_DIR
 PGLIB_CONF = '%s/plugins/plumgrid/plumlib.ini' % NEUTRON_CONF_DIR
@@ -63,6 +63,23 @@ NETWORKING_PLUMGRID_VERSION = OrderedDict([
 ])
 
 
+def configure_pg_sources():
+    '''
+    Returns true if install sources is updated in sources.list file
+    '''
+    try:
+        with open(SOURCES_LIST, 'r+') as sources:
+            all_lines = sources.readlines()
+            sources.seek(0)
+            for i in (line for line in all_lines if "plumgrid" not in line):
+                sources.write(i)
+            sources.truncate()
+        sources.close()
+        return True
+    except IOError:
+        return False
+
+
 def determine_packages():
     '''
     Returns list of packages required to be installed alongside neutron to