Fix removing nova_libvirt container issue

Retry once when removing or upgrading nova_libvirt to ensure it is
removed

Closes-Bug: #1617741
Change-Id: I8b5046a438c0ef3599a4333bbe77333f0af323ff
Signed-off-by: Jeffrey Zhang <zhang.lei.fly@gmail.com>

ansible/roles/nova/tasks/do_reconfigure.yml

@@ -164,12 +164,16 @@
     name: "{{ item[0]['name'] }}"
     action: "remove_container"
   register: remove_containers
+  until: remote_container|success
+  retries: "{{ item[0]['retries']|default(0) }}"
   when:
     - inventory_hostname in groups[item[0]['group']]
     - config_strategy == "COPY_ONCE" or item[1]['KOLLA_CONFIG_STRATEGY'] == 'COPY_ONCE'
     - item[2]['rc'] == 1
   with_together:
-    - [{ name: nova_libvirt, group: compute },
+    # NOTE(Jeffrey4l): retry 1 to remove nova_libvirt container because when
+    # guests running, nova_libvirt will raise error even though it is removed.
+    - [{ name: nova_libvirt, group: compute, retries: 1 },
        { name: nova_ssh, group: compute },
        { name: nova_conductor, group: nova-conductor },
        { name: nova_api, group: nova-api },

ansible/roles/nova/tasks/start_compute.yml

@@ -18,6 +18,11 @@
       - "libvirtd:/var/lib/libvirt"
       - "nova_compute:/var/lib/nova/"
       - "nova_libvirt_qemu:/etc/libvirt/qemu"
+  register: start_nova_libvirt_container
+  # NOTE(Jeffrey4l): retry 1 to remove nova_libvirt container because when
+  # guests running, nova_libvirt will raise error even though it is removed.
+  retries: 1
+  until: start_nova_libvirt_container|success
   when: inventory_hostname in groups['compute']
 
 - name: Prepare volumes list