ansible postgres playbook with PostGIS on Ubuntu, setting up postgis_template and creating databases from this postgis_template

gistfile1.txt

# Based on https://github.com/ansible/ansible/blob/devel/examples/playbooks/postgresql.yml

---
- hosts: postgres.vm
  sudo: yes
  
  tasks:
  - name: ensure latest postgres & postgis packages are latest
    action: apt pkg=$item update_cache=yes state=latest
    with_items:
      - postgresql-server-dev-9.1
      - postgresql-contrib-9.1
      - postgresql-9.1-postgis
      - phppgadmin
      - python-psycopg2

  - name: ensure postgresql server is running
    action: service name=postgresql state=started

- hosts: postgres
  sudo: yes
  sudo_user: postgres
  
  vars_files:
    - vars.yml
  
  tasks:

  # http://trac.osgeo.org/postgis/wiki/UsersWikiPostGIS15Ubuntu1110src
  - name: ensure postgis_template database exists
    action: postgresql_db db=postgis_template state=present
    register: createdb_postgis_template

  - name: make postgis_template a template
    action: command psql -d postgis_template -c "UPDATE pg_database SET datistemplate=true WHERE datname='postgis_template';"
    only_if: '${createdb_postgis_template.changed}'

  - name: create extension uuid-ossp on postgis_template
    action: command psql -d postgis_template -c 'CREATE EXTENSION "uuid-ossp";'
    only_if: '${createdb_postgis_template.changed}'

  - name: run the postgis SQL scripts
    action: command psql -d postgis_template -f $item
    only_if: '${createdb_postgis_template.changed}'
    with_items:
      - /usr/share/postgresql/9.1/contrib/postgis-1.5/postgis.sql
      - /usr/share/postgresql/9.1/contrib/postgis-1.5/spatial_ref_sys.sql
      - /usr/share/postgresql/9.1/contrib/postgis_comments.sql

  - name: ensure postgres.conf is correct
    action: copy src=./files/postgresql.conf dest=/etc/postgresql/9.1/main/postgresql.conf
    notify: restart postgresql

  - name: ensure pg_hba.conf is correct
    action: copy src=./files/pg_hba.conf dest=/etc/postgresql/9.1/main/pg_hba.conf
    notify: restart postgresql
  
  # non-idempotent, but the postgresql_db module does not support template
  - name: ensure named databases exist
    action: command createdb -T postgis_template $item
    with_items: $db_names
    ignore_errors: True

  - name: ensure user "$db_user" has access to those databases
    action: postgresql_user db=$item user=$db_user password="$db_password" priv=ALL state=present
    with_items: $db_names

  handlers:
    - name: restart postgresql
      action: service name=postgresql state=restarted