ha.yml

---
# https://cbonte.github.io/haproxy-dconv/1.8/management.html#9.3-show%20servers%20state
- hosts: 127.0.0.1
  vars:
    admin_sock: /tmp/haproxy.sock
    backend: default
  pre_tasks:
    - name: Read haproxy state from admin socket
      shell: echo "show servers state {{ backend }}" | socat "{{ admin_sock }}" stdio | tail -n3 > "/tmp/{{backend}}-csv"
    - name: Parse haproxy state csv to ansible dict
      read_csv:
        delimiter: " "
        path: "/tmp/{{backend}}-csv"
        key: srv_name
        fieldnames: be_id,be_name,srv_id,srv_name,srv_addr,srv_op_state,srv_admin_state
      register: haproxy
    - debug:
        msg: 'Blue state: {{ haproxy.dict.blue.srv_op_state }}'
    - debug:
        msg: 'Green state: {{ haproxy.dict.green.srv_op_state }}'
  roles:
    - role: deploy-green
      when: haproxy.dict.green.srv_op_state == "0" and haproxy.dict.blue.srv_op_state == "2"
    - role: deploy-blue
      when: haproxy.dict.blue.srv_op_state == "0" and haproxy.dict.green.srv_op_state == "2"
    - role: deploy-blue
      when: haproxy.dict.blue.srv_op_state == "0" and haproxy.dict.green.srv_op_state == "0"
            or
            haproxy.dict.blue.srv_op_state == "2" and haproxy.dict.green.srv_op_state == "2"