tchatter-app-nodes.yml

---
- hosts: app-nodes
  gather_facts: no
  serial: 1

  pre_tasks:
    - name: 'remove app node from haproxy pool (http + websocket)'
      shell: 'echo "disable server {{ item }}"
          | docker run -i -t --volumes-from=haproxy tchatter/haproxy socat /var/haproxy-run/haproxy.sock stdio'
      with_items:
        - bk_static/srv_web_{{ inventory_hostname }}
        - bk_websocket/srv_ws_{{ inventory_hostname }}
      delegate_to: docker-host

  tasks:
    - name: detect whether a new tchatter-app image has just been created
      command: test -f {{ tchatter_app_image_creation_marker_file }}
      register: image_creation_check
      ignore_errors: yes
      delegate_to: docker-host
 
    # first kills in-container process to speedup container removal
    # ("state=absent" first attempts to "stop" it, which may take some time)
    - name: kill existing tchatter-app docker container
      docker: image=tchatter/tchatter-app name={{ inventory_hostname }} state=killed
      ignore_errors: yes
      when: image_creation_check|success or (force_new_app_container is defined and force_new_app_container == "yes")
      delegate_to: docker-host
 
    - name: remove existing tchatter-app docker container
      docker: image=tchatter/tchatter-app name={{ inventory_hostname }} state=absent
      when: image_creation_check|success or (force_new_app_container is defined and force_new_app_container == "yes")
      delegate_to: docker-host
 
    - name: create/start tchatter-app docker container from image
      docker: image=tchatter/tchatter-app name={{ inventory_hostname }} state=running detach=yes ports={{ node_app_port }}:{{ tchatter_app_default_port }} links=redis-server:redis
      delegate_to: docker-host

  post_tasks:
    - name: 'put app node into haproxy pool (http + websocket)'
      shell: 'echo "enable server {{ item }}"
          | docker run -i -t --volumes-from=haproxy tchatter/haproxy socat /var/haproxy-run/haproxy.sock stdio'
      with_items:
        - bk_static/srv_web_{{ inventory_hostname }}
        - bk_websocket/srv_ws_{{ inventory_hostname }}
      delegate_to: docker-host


- hosts: docker-host
  tasks:
    - name: remove image creation marker file
      file: path={{ tchatter_app_image_creation_marker_file }} state=absent