# postgresql_db – Add or remove PostgreSQL databases from a remote host

- Synopsis

- Requirements

- Parameters

- Notes

- See Also

- Examples

- Status

## Synopsis

- Add or remove PostgreSQL databases from a remote host.

## Requirements

The below requirements are needed on the host that executes this module.

- psycopg2

## Parameters

Parameter | Choices/Defaults | Comments
--- | --- | ---
ca_cert string |  | Specifies the name of a file containing SSL certificate authority (CA) certificate(s). If the file exists, the server's certificate will be verified to be signed by one of these authorities. aliases: ssl_rootcert
conn_limit string added in 2.8 |  | Specifies the database connection limit.
encoding string |  | Encoding of the database
lc_collate string |  | Collation order (LC_COLLATE) to use in the database. Must match collation order of template database unless `template0` is used as template.
lc_ctype string |  | Character classification (LC_CTYPE) to use in the database (e.g. lower, upper, ...) Must match LC_CTYPE of template database unless `template0` is used as template.
login_host string |  | Host running the database.
login_password string |  | The password used to authenticate with.
login_unix_socket string |  | Path to a Unix domain socket for local connections.
login_user string | Default: "postgres" | The username used to authenticate with.
maintenance_db string added in 2.5 | Default: "postgres" | The value specifies the initial database (which is also called as maintenance DB) that Ansible connects to.
name string / required |  | Name of the database to add or remove aliases: db
owner string |  | Name of the role to set as owner of the database
port integer | Default: 5432 | Database port to connect (if needed) aliases: login_port
session_role string added in 2.8 |  | Switch to session_role after connecting. The specified session_role must be a role that the current login_user is a member of. Permissions checking for SQL commands is carried out as though the session_role were the one that had logged in originally.

ssl_mode
string

Choices:
- allow
- disable
- prefer ←
- require
- verify-ca
- verify-full

Determines whether or with what priority a secure SSL TCP/IP connection will be negotiated with the server.
See https://www.postgresql.org/docs/current/static/libpq-ssl.html for more information on the modes.
Default of `prefer` matches libpq default.

state
string

Choices:
- absent
- dump
- present ←
- restore

The database state.
`present` implies that the database should be created if necessary.
`absent` implies that the database should be removed if present.
`dump` requires a target definition to which the database will be backed up. (Added in Ansible 2.4) Note that in some PostgreSQL versions of pg_dump, which is an embedded PostgreSQL utility and is used by the module, returns rc 0 even when errors occurred (e.g. the connection is forbidden by pg_hba.conf, etc.), so the module returns changed=True but the dump has not actually been done. Please, be sure that your version of pg_dump returns rc 1 in this case.
`restore` also requires a target definition from which the database will be restored. (Added in Ansible 2.4)
The format of the backup will be detected based on the target name.
Supported compression formats for dump and restore include `.bz2`, `.gz` and `.xz`
Supported formats for dump and restore include `.sql` and `.tar`

tablespace path added in 2.9 |  | The tablespace to set for the database https://www.postgresql.org/docs/current/sql-alterdatabase.html. If you want to move the database back to the default tablespace, explicitly set this to pg_default.
target path added in 2.4 |  | File to back up or restore from. Used when state is `dump` or `restore`.
target_opts string added in 2.4 |  | Further arguments for pg_dump or pg_restore. Used when state is `dump` or `restore`.
template string |  | Template used to create the database

## Notes

Note

- State `dump` and `restore` don’t require psycopg2 since version 2.8.

- The default authentication assumes that you are either logging in as or sudo’ing to the `postgres` account on the host.

- To avoid “Peer authentication failed for user postgres” error, use postgres user as a become_user.

- This module uses psycopg2, a Python PostgreSQL database adapter. You must ensure that psycopg2 is installed on the host before using this module.

- If the remote host is the PostgreSQL server (which is the default case), then PostgreSQL must also be installed on the remote host.

- For Ubuntu-based systems, install the postgresql, libpq-dev, and python-psycopg2 packages on the remote host before using this module.

- The ca_cert parameter requires at least Postgres version 8.4 and psycopg2 version 2.4.3.

## See Also

See also

CREATE DATABASE reference

  Complete reference of the CREATE DATABASE command documentation.

DROP DATABASE reference

  Complete reference of the DROP DATABASE command documentation.

pg_dump reference

  Complete reference of pg_dump documentation.

pg_restore reference

  Complete reference of pg_restore documentation.

postgresql_tablespace – Add or remove PostgreSQL tablespaces from remote hosts

  The official documentation on the postgresql_tablespace module.

postgresql_info – Gather information about PostgreSQL servers

  The official documentation on the postgresql_info module.

postgresql_ping – Check remote PostgreSQL server availability

  The official documentation on the postgresql_ping module.

## Examples

    - name: Create a new database with name "acme"
      postgresql_db:
        name: acme

    # Note: If a template different from "template0" is specified, encoding and locale settings must match those of the template.
    - name: Create a new database with name "acme" and specific encoding and locale # settings.
      postgresql_db:
        name: acme
        encoding: UTF-8
        lc_collate: de_DE.UTF-8
        lc_ctype: de_DE.UTF-8
        template: template0

    # Note: Default limit for the number of concurrent connections to a specific database is "-1", which means "unlimited"
    - name: Create a new database with name "acme" which has a limit of 100 concurrent connections
      postgresql_db:
        name: acme
        conn_limit: "100"

    - name: Dump an existing database to a file
      postgresql_db:
        name: acme
        state: dump
        target: /tmp/acme.sql

    - name: Dump an existing database to a file (with compression)
      postgresql_db:
        name: acme
        state: dump
        target: /tmp/acme.sql.gz

    - name: Dump a single schema for an existing database
      postgresql_db:
        name: acme
        state: dump
        target: /tmp/acme.sql
        target_opts: "-n public"

    # Note: In the example below, if database foo exists and has another tablespace
    # the tablespace will be changed to foo. Access to the database will be locked
    # until the copying of database files is finished.
    - name: Create a new database called foo in tablespace bar
      postgresql_db:
        name: foo
        tablespace: bar

## Status

- This module is guaranteed to have backward compatible interface changes going forward. [stableinterface]

- This module is maintained by the Ansible Community. [community]

### Authors

- Ansible Core Team

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