Added all files

examples/012_mysql_management/playbook/clean-database.yml

@@ -0,0 +1,9 @@
+---
+- hosts: database
+  become: true
+  tasks:
+    - name: create demo database
+      mysql_db: name=demo state=absent
+
+    - name: create demo user
+      mysql_user: name=demo password=demo priv=demo.*:ALL host='%' state=absent

examples/012_mysql_management/playbook/hostname.yml

@@ -0,0 +1,5 @@
+---
+  - hosts: all
+    tasks:
+      - name: get server hostname
+        command: hostname

examples/012_mysql_management/playbook/stack_restart.yml

@@ -0,0 +1,28 @@
+---
+# Bring stack down
+- hosts: loadbalancer
+  become: true
+  tasks:
+    - service: name=nginx state=stopped
+
+- hosts: webserver
+  become: true
+  tasks:
+    - service: name=apache2 state=stopped
+
+# Restart mysql - commented problem with the VMs
+- hosts: database
+  become: true
+  tasks:
+    - service: name=mysql state=restarted
+
+# Bring stack up
+- hosts: webserver
+  become: true
+  tasks:
+    - service: name=apache2 state=started
+
+- hosts: loadbalancer
+  become: true
+  tasks:
+    - service: name=nginx state=started