---
- 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: loadbalancer
  tasks:
    - name: verify backend index response
      uri: url=http://{{item}} return_content=yes
      loop: "{{ groups.webserver }}"
      register: app_index

    - fail: msg="index failed to return content"
      when: ("Hello, from sunny " ~ item.content ~ "!") not in item.content
      loop: "{{app_index.results}}"

    - name: verify backend db response
      uri: url=http://{{item}}/db return_content=yes
      loop: "{{ groups.webserver }}"
      register: app_db

    - fail: msg="db failed to return content"
      when: ("Database Connected from " ~ item.content ~ "!") not in item.content
      loop: "{{app_db.results}}"

- hosts: control
  tasks:
    - name: get elements from loadbalancer group
      debug: var=groups.loadbalancer
    
    - name: verify end-to-end connectivity to loadbalancer
      uri: url=http://{{item}} return_content=yes
      loop: "{{ groups.loadbalancer }}"
      register: lb_connectivity

    - fail: msg="index failed to return content"
      when: ("Hello, from sunny " ~ item.content ~ "!") not in item.content
      loop: "{{lb_connectivity.results}}"

    - name: verify end-to-end db response
      uri: url=http://{{item}}/db return_content=yes
      loop: "{{ groups.loadbalancer }}"
      register: lb_db

    - fail: msg="db failed to return content"
      when: ("Database Connected from " ~ item.content ~ "!") not in item.content
      loop: "{{lb_db.results}}"