Add post-upgrade-configuration action

Add post-upgrade-configuration action which can be run after a Trilio
upgrade.

Trilio sometimes updates packages in package repositiories that
require DB migrations or config file changes. Since these package
updates are not applied by the charm as they would be by changing the
openstack-origin or triliovault-pkg-source the charm has no event to
react to to automatically perform the post package upgrade actions.
This change adds an action `post-upgrade-configuration` which can
be run to apply the changes.

func-test-pr: https://github.com/openstack-charmers/zaza-openstack-tests/pull/613
Change-Id: I4dcc5d285e705c15ffc72c4497c3154877c7a44f

.gitignore

@@ -8,3 +8,4 @@ test-charm/
 .stestr
 .coverage
 cover
+*.swp

src/actions.yaml

@@ -16,3 +16,8 @@ ghost-share:
       description: Comma separated nfs-shares configuration option from secondary deployment. NFS shares must be provided in the same order as the nfs-shares configuration option for the local deployment.
   required:
     - nfs-shares
+post-upgrade-configuration:
+  description: |
+    If the Trilio packages were upgraded outside of the charms control then run
+    this action to rerender configuration files and run any upgrade tasks such
+    as database migrations.

src/actions/actions.py

@@ -66,12 +66,23 @@ def ghost_share(*args):
         trilio_wlm_charm._assess_status()
 
 
+def post_upgrade_configuration(*args):
+    """Run setup after Trilio upgrade.
+    """
+    with charms_openstack.charm.provide_charm_instance() as trilio_wlm_charm:
+        trilio_wlm_charm.render_all_configs()
+        if hookenv.is_leader():
+            trilio_wlm_charm.do_trilio_upgrade_db_migration()
+        trilio_wlm_charm._assess_status()
+
+
 # Actions to function mapping, to allow for illegal python action names that
 # can map to a python function.
 ACTIONS = {
     "create-cloud-admin-trust": create_cloud_admin_trust,
     "create-license": create_license,
     "ghost-share": ghost_share,
+    "post-upgrade-configuration": post_upgrade_configuration,
 }
 
 

src/actions/post-upgrade-configuration

@@ -0,0 +1 @@
+actions.py