Reconfigure mariadb service

Implements reconfiguring the mariadb service.

Change-Id: Ia28b85df10494adeb585fa9352ec7d45f95b8e5e
Closes-Bug: #1553524

ansible/roles/mariadb/tasks/config.yml

@@ -20,6 +20,7 @@
       service_name: "{{ item }}"
     sources:
       - "{{ role_path }}/templates/galera.cnf.j2"
+      - "/etc/kolla/config/galera.cnf"
     dest: "{{ node_config_directory }}/{{ item }}/galera.cnf"
   with_items:
     - "mariadb"

ansible/roles/mariadb/tasks/do_reconfigure.yml

@@ -0,0 +1,66 @@
+---
+- name: Ensuring the containers up
+  kolla_docker:
+    name: "{{ item.name }}"
+    action: "get_container_state"
+  register: container_state
+  failed_when: container_state.Running == false
+  when: inventory_hostname in groups[item.group]
+  with_items:
+    - { name: mariadb, group: mariadb }
+
+- include: config.yml
+
+- name: Check the configs
+  command: docker exec {{ item.name }} /usr/local/bin/kolla_set_configs --check
+  changed_when: false
+  failed_when: false
+  register: check_results
+  when: inventory_hostname in groups[item.group]
+  with_items:
+    - { name: mariadb, group: mariadb }
+
+# NOTE(jeffrey4l): when config_strategy == 'COPY_ALWAYS'
+# and container env['KOLLA_CONFIG_STRATEGY'] == 'COPY_ONCE',
+# just remove the container and start again
+- name: Containers config strategy
+  kolla_docker:
+    name: "{{ item.name }}"
+    action: "get_container_env"
+  register: container_envs
+  when: inventory_hostname in groups[item.group]
+  with_items:
+    - { name: mariadb, group: mariadb }
+
+- name: Remove the containers
+  kolla_docker:
+    name: "{{ item[0]['name'] }}"
+    action: "remove_container"
+  register: remove_containers
+  when:
+    - config_strategy == "COPY_ONCE" or item[1]['KOLLA_CONFIG_STRATEGY'] == 'COPY_ONCE'
+    - item[2]['rc'] == 1
+    - inventory_hostname in groups[item[0]['group']]
+  with_together:
+    - [{ name: mariadb, group: mariadb }]
+    - container_envs.results
+    - check_results.results
+
+- include: start.yml
+  when: remove_containers.changed
+
+- name: Restart containers
+  kolla_docker:
+    name: "{{ item[0]['name'] }}"
+    action: "restart_container"
+  when:
+    - config_strategy == 'COPY_ALWAYS'
+    - item[1]['KOLLA_CONFIG_STRATEGY'] != 'COPY_ONCE'
+    - item[2]['rc'] == 1
+    - inventory_hostname in groups[item[0]['group']]
+  with_together:
+    - [{ name: mariadb, group: mariadb }]
+    - container_envs.results
+    - check_results.results
+
+- include: check.yml

ansible/roles/mariadb/tasks/reconfigure.yml

@@ -1 +1,4 @@
 ---
+- include: do_reconfigure.yml
+  serial: "30%"
+  when: inventory_hostname in groups['mariadb']