Fixes an issue with AIO and galera clusters

AIO nodes had an address in the gcomm list which would prevent AIO
containers from starting appropriately.

Change-Id: I6db8c831ef9f9c0348748eb9539db326dc0df048
Closes-Bug: #1472481

ansible/roles/database/tasks/main.yml

@@ -5,9 +5,16 @@
 
 - include: start.yml
 
+# We use register as a test to see whether the database is active and ready to
+# communicate. This run on all hosts that have a database and attempts to talk
+# to the local database rather than the vip,
 - include: register.yml
 
 # This will restart the container we initially used to bootstrap the cluster to
 # make it match the other containers environment-wise. This also prevents a
 # change from showing up when rerunning the playbooks
 - include: start.yml
+
+# Since the last start.yml may have recreated some containers we must wait and
+# check the health again to ensure the hosts are active.
+- include: register.yml

ansible/roles/database/tasks/register.yml

@@ -1,7 +1,7 @@
 ---
 - name: Creating haproxy mysql user
   mysql_user:
-    login_host: "{{ database_address }}"
+    login_host: "{{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}"
     login_user: "{{ database_user }}"
     login_password: "{{ database_password }}"
     name: "haproxy"

ansible/roles/database/tasks/start.yml

@@ -9,5 +9,5 @@
       - "{{ node_config_directory }}/mariadb/:/opt/kolla/mariadb/:ro"
     container_volumes_from:
       - "mariadb_data"
-  when: delegate_host != 'None' or
-        ( delegate_host == 'None' and inventory_hostname != groups['database'][0])
+  when: delegate_host != 'None' or (groups['database'] | length) == 1 or
+        ( delegate_host == 'None' and inventory_hostname != groups['database'][0] )

ansible/roles/database/templates/galera.cnf.j2

@@ -8,7 +8,7 @@ query_cache_type=0
 innodb_log_file_size=48M
 
 wsrep_provider=/usr/lib64/galera/libgalera_smm.so
-wsrep_cluster_address=gcomm://{% for host in groups['database'] %}{{ hostvars[host]['ansible_hostname'] }}{% if not loop.last %},{% endif %}{% endfor %}
+wsrep_cluster_address=gcomm://{% if (groups['database'] | length) > 1 %}{% for host in groups['database'] %}{{ hostvars[host]['ansible_hostname'] }}{% if not loop.last %},{% endif %}{% endfor %}{% endif %}
 
 wsrep_cluster_name="{{ database_cluster_name }}"
 wsrep_node_address={{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }}