libvirt: add nova-libvirt-cleanup command

Change Ia1239069ccee39416b20959cbabad962c56693cf added support for
running a libvirt daemon on the host, rather than using the nova_libvirt
container. It did not cover migration of existing hosts from using a
container to using a host daemon.

This change adds a kolla-ansible nova-libvirt-cleanup command which may
be used to clean up the nova_libvirt container, volumes and related
items on hosts, once it has been disabled.

The playbook assumes that compute hosts have been emptied of VMs before
it runs. A future extension could support migration of existing VMs, but
this is currently out of scope.

Change-Id: I46854ed7eaf1d5b5e3ccd8531c963427848bdc99

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/kolla-ansible b/tools/kolla-ansible
index 23c08f23b..2f80ff67a 100755
--- a/tools/kolla-ansible
+++ b/tools/kolla-ansible
@@ -198,6 +198,7 @@ Commands:
     upgrade-bifrost      Upgrades an existing bifrost container
     genconfig            Generate configuration files for enabled OpenStack services
     prune-images         Prune orphaned Kolla images
+    nova-libvirt-cleanup Clean up disabled nova_libvirt containers
 EOF
 }
 
@@ -244,6 +245,7 @@ upgrade
 upgrade-bifrost
 genconfig
 prune-images
+nova-libvirt-cleanup
 EOF
 }
 
@@ -547,6 +549,10 @@ EOF
             exit 1
         fi
         ;;
+(nova-libvirt-cleanup)
+        ACTION="Cleanup disabled nova_libvirt containers"
+        PLAYBOOK="${BASEDIR}/ansible/nova-libvirt-cleanup.yml"
+        ;;
 (bash-completion)
         bash_completion
         exit 0