ansible-roles/library/roles/postgresql/tasks/pgpool-ii.yml

---
- block:
    - name: Install the pgpool package
      apt: name={{ pgpool_pkgs }} state={{ psql_pgpool_pkg_state }} cache_valid_time=1800

    - name: Configure pcp
      #template: src=pcp.conf.j2 dest=/etc/pgpool2/pcp.conf owner=root group=postgres mode=0640
      shell: pwd=`pg_md5 {{ pcp_pwd }}` ; echo "{{ pgpool_pcp_user }}:${pwd}" > /etc/pgpool2/pcp.conf ; chmod 640 /etc/pgpool2/pcp.conf; chown root:postgres /etc/pgpool2/pcp.conf 
  
    - name: Install the pgpool configuration file
      template: src=pgpool.conf.j2 dest=/etc/pgpool2/pgpool.conf owner=root group=postgres mode=0640
      notify: Restart pgpool2

    - name: Give access to the remote postgresql clients
      lineinfile: name=/etc/pgpool2/pool_hba.conf regexp="^host {{ item.0.name }} {{ item.0.user }} {{ item.1 }}.*$" line="host {{ item.0.name }} {{ item.0.user }} {{ item.1 }} md5"
      with_subelements: 
        - '{{ psql_db_data | default([]) }}'
        - allowed_hosts
      when:
        - psql_db_data is defined
        - item.1 is defined
      notify: Reload pgpool2
  
    - name: Create the pki directory to store the pgpool key
      file: dest=/etc/pki/pgpool2 state=directory owner=postgres group=postgres mode=0750
      when: pgpool_enable_ssl

    - name: Create a pgpool accessible ssl key file if it does not exist
      copy: src=/var/lib/acme/live/{{ ansible_fqdn }}/privkey dest=/etc/pki/pgpool2/pgpool2.key owner=postgres group=postgres mode=0400 remote_src=True
      when: pgpool_enable_ssl

    - name: Install the pool_passwd configuration file
      shell: cd /etc/pgpool2 ; pg_md5 -m -u {{ item.user }} {{ item.pwd }} ; chown root:postgres /etc/pgpool2/pool_passwd ; chmod 660 /etc/pgpool2/pool_passwd
      with_items: '{{ psql_db_data | default([]) }}'
  
    - name: Install the sudoers config that permits pgpool change the network configuration during a failover
      template: src=pgpool-wd-sudoers.j2 dest=/etc/sudoers.d/pgpool-wd owner=root group=root mode=0440

    - name: Install the ip script that manage the network configuration during a failover
      copy: src={{ item }} dest=/sbin/{{ item }} owner=root group=root mode=0755
      with_items:
        - ip_script

    - name: Install the arping scripts that manage the network configuration during a failover
      copy: src={{ item }} dest=/usr/local/bin/{{ item }} owner=root group=root mode=0755
      with_items:
        - arping_script

    - name: Start and enable pgpool2
      service: name=pgpool2 state=started enabled=yes

  when: pgpool_enabled 
  tags: [ 'postgresql', 'postgres', 'pgpool', 'pcp_conf', 'pgpool_conf' ]


- block:
    - name: Stop and disable pgpool2
      service: name=pgpool2 state=stopped enabled=no

    - name: Install the pgpool packages
      apt: name={{ pgpool_pkgs }} state=absent

    - name: Remove the pgpool failover sudoers file
      file: dest=/etc/sudoers.d/pgpool-wd state=absent

    - name: Remove the pgpool configuration directory
      file: dest=/etc/pgpool2 state=absent

    - name: Remove the scripts that manage the network configuration during a failover
      file: dest={{ item }} state=absent
      with_items:
        - /sbin/ip_script
        - /usr/local/bin/arping_script

  when: not pgpool_enabled
  tags: [ 'postgresql', 'postgres', 'pgpool' ]