Check if this role is deployed as part of the cluster

This makes it possible to deploy a galara cluster in one set of hosts
and a separate stand alone mariadb on another host.

gcc-site.yml

@@ -1,14 +1,14 @@
 ---
-- include: common.yml
-- include: rabbitmq.yml
-- include: memcached.yml
-- include: mariadb.yml
-- include: keystone.yml
-- include: glance-controller.yml
-- include: nova-controller.yml
-- include: neutron-controller.yml
-- include: cinder-controller.yml
-- include: cinder-storage.yml
-- include: nova-compute.yml
-- include: horizon.yml
-- include: gcc-post-install.yml
+- import_tasks: common.yml
+- import_tasks: rabbitmq.yml
+- import_tasks: memcached.yml
+- import_tasks: mariadb.yml
+- import_tasks: keystone.yml
+- import_tasks: glance-controller.yml
+- import_tasks: nova-controller.yml
+- import_tasks: neutron-controller.yml
+- import_tasks: cinder-controller.yml
+- import_tasks: cinder-storage.yml
+- import_tasks: nova-compute.yml
+- import_tasks: horizon.yml
+- import_tasks: gcc-post-install.yml

roles/common/tasks/main.yml

@@ -5,7 +5,7 @@
 - name: Passwordless sudo for admins
   lineinfile: dest=/etc/sudoers line="%admin  ALL=(ALL:ALL) NOPASSWD:ALL"
 
-- include: users.yml
+- import_tasks: users.yml
 
 - name: common | install packages
   apt: pkg={{ item }} state=latest update_cache=yes
@@ -26,4 +26,4 @@
     owner: root
     group: root
 
-- include: docker.yml
+- import_tasks: docker.yml

roles/mariadb/tasks/main.yml

@@ -21,12 +21,14 @@
     dest: /srv/mariadb/etc/mysql/conf.d/my.cnf
     mode: 660
 
-- name: Set galara.cnf on node if we have at least three nodes.
+- name: >
+        Set galara.cnf on node if we have at least three nodes.
+        And we're part of the cluster.
   template:
     src: files/galera.cnf
     dest: /srv/mariadb/etc/mysql/conf.d/galera.cnf
     mode: 660
-  when: groups['databases'] | length >= 3
+  when: "'databases' in group_names and groups['databases'] | length >= 3"
 
   # This mimics galera_new_cluster.sh
 - name: Initialize a new cluster.
@@ -47,7 +49,8 @@
         name: mysql.service
         state: started
 
-  when: groups['databases'] | length >= 3 and ansible_hostname == hostname_node0
+  when: "'databases' in group_names and groups['databases'] \
+         | length >= 3 and ansible_hostname == hostname_node0"
 
 - name: install service file.
   block:
@@ -61,12 +64,22 @@
         group: root
 
 - name: Give the master node some time to initialize the cluster.
-  command: bash -c "sleep 60 && systemctl daemon-reload"
+  command: bash -c "sleep 60"
+  when: "'databases' in group_names and groups['databases'] \
+         | length >= 3"
+
+- name: Daemon reload (the implicit doesn't work)
+  command: bash -c "systemctl daemon-reload"
 
 - name: make sure service is started
   systemd:
     name: mysql.service
     state: started
+    daemon_reload: yes
 
 - name: start service at boot.
   command: systemctl reenable mysql.service
+
+- name: Give the cluster some time to initialize replication.
+  command: bash -c "sleep 60 && systemctl daemon-reload"
+  when: "'databases' in group_names and groups['databases'] | length >= 3"

site.yml

@@ -1,15 +1,15 @@
 ---
-- include: common.yml
-- include: rabbitmq.yml
-- include: memcached.yml
-- include: mariadb.yml
-- include: keystone.yml
-- include: glance-controller.yml
-- include: nova-controller.yml
-- include: neutron-controller.yml
-- include: cinder-controller.yml
-- include: cinder-storage.yml
-- include: nova-compute.yml
-- include: horizon.yml
-- include: heat.yml
-- include: post-install.yml
+- import_playbook: common.yml
+- import_playbook: rabbitmq.yml
+- import_playbook: memcached.yml
+- import_playbook: mariadb.yml
+- import_playbook: keystone.yml
+- import_playbook: glance-controller.yml
+- import_playbook: nova-controller.yml
+- import_playbook: neutron-controller.yml
+- import_playbook: cinder-controller.yml
+- import_playbook: cinder-storage.yml
+- import_playbook: nova-compute.yml
+- import_playbook: horizon.yml
+- import_playbook: heat.yml
+- import_playbook: post-install.yml