hooks:
  after_cron:
    - file:
       path: /var/lib/postgresql/take-database-backup
       chown: postgres:postgres
       chmod: "+x"
       contents: |
          #!/bin/bash
          ID=db-$(date +%F_%T)
          FILENAME=/shared/postgres_backup/$ID.tar.gz
          pg_basebackup --format=tar --pgdata=- --xlog --gzip --label=$ID > $FILENAME
          echo $FILENAME

    - file:
       path: /var/spool/cron/crontabs/postgres
       contents: |
          # m h  dom mon dow   command
          #MAILTO=?
          0 */4 * * * /var/lib/postgresql/take-database-backup

  before_code:
    - exec:
        background: true
        cmd: "sudo -u postgres /usr/lib/postgresql/9.2/bin/postmaster -D /etc/postgresql/9.2/main"

    # give db a few secs to start up
    - exec: "sleep 5"

    - exec: sudo -u postgres createdb discourse || exit 0
    - exec:
        stdin: |
          create user discourse;
        cmd: sudo -u postgres psql discourse
        raise_on_fail: false

    - exec:
        stdin: |
          grant all privileges on database discourse to discourse;
        cmd: sudo -u postgres psql discourse
        raise_on_fail: false

    - exec: /bin/bash -c 'sudo -u postgres psql discourse <<< "create extension if not exists hstore;"'
    - exec: /bin/bash -c 'sudo -u postgres psql discourse <<< "create extension if not exists pg_trgm;"'
    - replace:
       filename: /etc/service/sidekiq/run
       from: "# postgres"
       to: sv start postgres || exit 1
    - replace:
       filename: /etc/service/unicorn/run
       from: "# postgres"
       to: sv start postgres || exit 1

run:
  - file:
     path: /etc/service/postgres/run
     chmod: "+x"
     contents: |
        #!/bin/sh
        exec 2>&1
        exec sudo -u postgres /usr/lib/postgresql/9.2/bin/postmaster -D /etc/postgresql/9.2/main

  - exec:
      cmd:
        - chown -R root /var/lib/postgresql/9.2/main
        - "[ ! -e /shared/postgres_data ] && install -d -m 0755 -o postgres -g postgres /shared/postgres_data && sudo -u postgres /usr/lib/postgresql/9.2/bin/initdb -D /shared/postgres_data || exit 0"
        - chown -R postgres:postgres /shared/postgres_data

  - replace:
      filename: "/etc/postgresql/9.2/main/postgresql.conf"
      from: "data_directory = '/var/lib/postgresql/9.2/main'"
      to: "data_directory = '/shared/postgres_data'"

  # Necessary to enable backups
  - exec:
      cmd:
        - install -d -m 0755 -o postgres -g postgres /shared/postgres_backup

  - replace:
      filename: "/etc/postgresql/9.2/main/postgresql.conf"
      from: /#?max_wal_senders *=.*/
      to: "max_wal_senders = 4"

  - replace:
      filename: "/etc/postgresql/9.2/main/postgresql.conf"
      from: /#?wal_level *=.*/
      to: "wal_level = hot_standby"

  - replace:
      filename: "/etc/postgresql/9.2/main/pg_hba.conf"
      from: /^#local +replication +postgres +peer$/
      to: "local replication postgres  peer"