Implemented idempotent docker run and user creation for mariadb

examples/resources/simple/haproxy/run.yml

@@ -2,6 +2,10 @@
 - hosts: [service/haproxy]
   sudo: yes
   tasks:
+    - shell: docker ps | grep -q {{name}}
+      ignore_errors: true
+      register: is_running
+
     - file: state=directory path=/etc/solar/{{name}}
       # TODO Remove hardcoded path
     - template: src=/vagrant/examples/resources/templates/haproxy.cfg.j2 dest=/etc/solar/{{name}}/haproxy.cfg backup=yes
@@ -10,3 +14,4 @@
         --privileged \
         -v /etc/solar/{{name}}/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro \
         --name {{name}} {{image}}
+      when: is_running|failed

examples/resources/simple/keystone/run.yml

@@ -2,6 +2,9 @@
 - hosts: [service/keystone]
   sudo: yes
   tasks:
+    - shell: docker ps | grep -q {{name}}
+      ignore_errors: true
+      register: is_running
       # NOTE(eli): specify restart policy (--restart parameter) for
       # keystone conatiner if there are more than 2 keystone containers
       # to be deployed, they both will perform db migration and will fail,
@@ -14,3 +17,4 @@
         -e "MARIADB_SERVICE_HOST={{db_host}}" \
         --restart="on-failure:10" \
         --name {{name}} {{image}}
+      when: is_running|failed

examples/resources/simple/mariadb/run.yml

@@ -2,6 +2,9 @@
 - hosts: [service/mariadb]
   sudo: yes
   tasks:
+    - shell: docker ps | grep -q {{name}}
+      ignore_errors: true
+      register: is_running
     - shell: docker run \
         -d \
         --net="host" \
@@ -10,3 +13,4 @@
         -e "MARIADB_ROOT_PASSWORD={{root_password}}" \
         -e "BIND_ADDRESS={{bind_ip}}" \
         {{image}}
+      when: is_running|failed

examples/resources/simple/mariadb/users.yml

@@ -2,11 +2,7 @@
 - hosts: [service/mariadb]
   sudo: yes
   tasks:
-    - command: docker exec -t {{name}} \
-        mysql -uroot -p{{root_password}} \
-        -e "CREATE USER '{{item.name}}'@'%' IDENTIFIED BY '{{item.password}}'"
-      with_items: users
-
+    # NOTE(eli): it will automatically create user if it does not exist
     - command: docker exec -t {{name}} \
         mysql -uroot -p{{root_password}} -e "GRANT ALL PRIVILEGES ON *.* TO '{{item.name}}'@'%' WITH GRANT OPTION"
       with_items: users