Add package install capability

src/lib/charm/openstack/neutron_arista.py

@@ -1,12 +1,21 @@
 #!/usr/bin/env python
 from collections import OrderedDict
-from charmhelpers.core.hookenv import config
+from charmhelpers.core.hookenv import (
+    config,
+    log
+)
 import charms_openstack.charm
 
 from charmhelpers.contrib.openstack import (
     context,
     templating,
 )
+from charmhelpers.fetch import (
+    apt_install,
+    apt_update,
+    filter_installed_packages,
+    add_source,
+)
 from charmhelpers.contrib.openstack.utils import os_release
 
 
@@ -25,6 +34,14 @@ class NeutronAristaCharm(charms_openstack.charm.OpenStackCharm):
     # List of packages to install for this charm
     packages = ['python-networking-arista']
 
+    def install(self):
+        log('Starting arista installation')
+        installed = len(filter_installed_packages(self.packages)) == 0
+        if not installed:
+            add_source(config('source'))
+            apt_update(fatal=True)
+            apt_install(self.packages[0], fatal=True)
+
     def write_config(self):
         configs = self.register_configs()
         configs.write_all()

src/metadata.yaml

@@ -9,6 +9,7 @@ tags:
 subordinate: true
 series:
   - xenial
+  - bionic
 provides:
   neutron-plugin-api-subordinate:
     interface: neutron-plugin-api-subordinate

src/reactive/neutron_arista_handlers.py

@@ -26,6 +26,12 @@ import charm.openstack.neutron_arista as arista  # noqa
 
 use_defaults('update-status')
 
+@reactive.when_not('arista-package.installed')
+@reactive.when('neutron-plugin-api-subordinate.available')
+def install_arista():
+    with provide_charm_instance() as charm_class:
+        charm_class.install()
+    reactive.set_state('arista-package.installed')
 
 @reactive.when('neutron-plugin-api-subordinate.connected')
 def configure_principle(api_principle):