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examples/021_vars/playbooks/stack_status.yml

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+---
+- hosts: loadbalancer
+  become: true
+  tasks:
+    - name: verify nginx service
+      command: service nginx status
+
+    - name: verify nginx is listening on 80
+      wait_for: port=80 timeout=1
+
+- hosts: webserver
+  become: true
+  tasks:
+    - name: verify apache2 service
+      command: service apache2 status
+
+    - name: verify apache2 is listening on 80
+      wait_for: port=80 timeout=1
+
+- hosts: database
+  become: true
+  tasks:
+    - name: verify mysql service
+      command: service mysql status
+
+    - name: verify mysql is listening on 3306
+      wait_for: port=3306 timeout=1
+
+- hosts: control
+  tasks:
+    - name: verify end-to-end index response
+      uri: url=http://{{item}} return_content=yes
+      with_items: "{{ groups.loadbalancer }}"
+      register: lb_index
+
+    - fail: msg="index failed to return content"
+      when: "'Hello, from sunny'  not in item.content"
+      with_items: "{{lb_index.results}}"
+
+    - name: verify end-to-end db response
+      uri: url=http://{{item}}/db return_content=yes
+      with_items: "{{ groups.loadbalancer }}"
+      register: lb_db
+
+    - fail: msg="db failed to return content"
+      when: "'Database Connected from' not in item.content"
+      with_items: "{{lb_db.results}}"
+
+- hosts: loadbalancer
+  tasks:
+    - name: verify backend index response
+      uri: url=http://{{item}} return_content=yes
+      with_items: "{{ groups.webserver }}"
+      register: app_index
+
+    - fail: msg="index failed to return content"
+      when: "'Hello, from sunny' not in item.content"
+      with_items: "{{app_index.results}}"
+
+    - name: verify backend db response
+      uri: url=http://{{item}}/db return_content=yes
+      with_items: "{{ groups.webserver }}"
+      register: app_db
+
+    - fail: msg="db failed to return content"
+      when: "'Database Connected from' not in item.content"
+      with_items: "{{app_db.results}}"