Ansible Role: PostgreSQL

Installs and configures PostgreSQL server on RHEL/CentOS or Debian/Ubuntu servers.

Requirements

No special requirements; note that this role requires root access, so either run it in a playbook with a global become: yes, or invoke the role in your playbook like:

- hosts: database
  roles:
    - role: geerlingguy.postgresql
      become: yes

On RedHat-based distributions, requires the EPEL repository (you can simply add the role geerlingguy.repo-epel to install ensure EPEL is available) or a valid RedHat Subscription.

Role Variables

Available variables are listed below, along with default values (see defaults/main.yml):

postgresql_enablerepo: ""

(RHEL/CentOS only) You can set a repo to use for the PostgreSQL installation by passing it in here.

postgresql_restarted_state: "restarted"

Set the state of the service when configuration changes are made. Recommended values are restarted or reloaded.

postgresql_python_library: python-psycopg2

Library used by Ansible to communicate with PostgreSQL. If you are using Python 3 (e.g. set via ansible_python_interpreter), you should change this to python3-psycopg2.

postgresql_user: postgres
postgresql_group: postgres

The user and group under which PostgreSQL will run.

postgresql_unix_socket_directories:
  - /var/run/postgresql

The directories (usually one, but can be multiple) where PostgreSQL's socket will be created.

postgresql_service_state: started
postgresql_service_enabled: true

Control the state of the postgresql service and whether it should start at boot time.

postgresql_global_config_options:
  - option: unix_socket_directories
    value: '{{ postgresql_unix_socket_directories | join(",") }}'

Global configuration options that will be set in postgresql.conf. Note that for RHEL/CentOS 6 (or very old versions of PostgreSQL), you need to at least override this variable and set the option to unix_socket_directory.

postgresql_hba_entries:
  - { type: local, database: all, user: postgres, auth_method: peer }
  - { type: local, database: all, user: all, auth_method: peer }
  - { type: host, database: all, user: all, address: '127.0.0.1/32', auth_method: md5 }
  - { type: host, database: all, user: all, address: '::1/128', auth_method: md5 }

Configure host based authentication entries to be set in the pg_hba.conf. Options for entries include:

• type (required)
• database (required)
• user (required)
• address (one of this or the following two are required)
• ip_address
• ip_mask
• auth_method (required)
• auth_options (optional)

If overriding, make sure you copy all of the existing entries from defaults/main.yml if you need to preserve existing entries.

postgresql_locales:
  - 'en_US.UTF-8'

(Debian/Ubuntu only) Used to generate the locales used by PostgreSQL databases.

postgresql_databases:
  - name: exampledb # required; the rest are optional
    lc_collate: # defaults to 'en_US.UTF-8'
    lc_ctype: # defaults to 'en_US.UTF-8'
    encoding: # defaults to 'UTF-8'
    template: # defaults to 'template0'
    login_host: # defaults to 'localhost'
    login_password: # defaults to not set
    login_user: # defaults to 'postgresql_user'
    login_unix_socket: # defaults to 1st of postgresql_unix_socket_directories
    port: # defaults to not set
    owner: # defaults to postgresql_user
    state: # defaults to 'present'

A list of databases to ensure exist on the server. Only the name is required; all other properties are optional.

postgresql_users:
  - name: jdoe #required; the rest are optional
    password: # defaults to not set
    encrypted: # defaults to not set
    priv: # defaults to not set
    role_attr_flags: # defaults to not set
    db: # defaults to not set
    login_host: # defaults to 'localhost'
    login_password: # defaults to not set
    login_user: # defaults to '{{ postgresql_user }}'
    login_unix_socket: # defaults to 1st of postgresql_unix_socket_directories
    port: # defaults to not set
    state: # defaults to 'present'

A list of users to ensure exist on the server. Only the name is required; all other properties are optional.

postgresql_version: [OS-specific]
postgresql_data_dir: [OS-specific]
postgresql_bin_path: [OS-specific]
postgresql_config_path: [OS-specific]
postgresql_daemon: [OS-specific]
postgresql_packages: [OS-specific]

OS-specific variables that are set by include files in this role's vars directory. These shouldn't be overridden unless you're using a version of PostgreSQL that wasn't installed using system packages.

Dependencies

None.

Example Playbook

- hosts: database
  become: yes
  vars_files:
    - vars/main.yml
  roles:
    - geerlingguy.postgresql

Inside vars/main.yml:

postgresql_databases:
  - name: example_db
postgresql_users:
  - name: example_user
    password: supersecure

License

MIT / BSD

Author Information

This role was created in 2016 by Jeff Geerling, author of Ansible for DevOps.

Modified by Joel Castillo for the NYC Department of Records and Information Services.