community.postgresql.postgresql_ping – Check remote PostgreSQL server availability

community.postgresql.postgresql_ping – Check remote PostgreSQL server availability

Note

This plugin is part of the community.postgresql collection (version 1.1.1).

To install it use: ansible-galaxy collection install community.postgresql.

To use it in a playbook, specify: community.postgresql.postgresql_ping.

• Synopsis
• Requirements
• Parameters
• Notes
• See Also
• Examples
• Return Values

Synopsis

• Simple module to check remote PostgreSQL server availability.

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
db string		Name of a database to connect to. aliases: login_db
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.
port integer	Default: 5432	Database port to connect to. aliases: login_port
session_role string added in 0.2.0 of community.postgresql		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	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.
trust_input boolean added in 0.2.0 of community.postgresql	no yes ←	If no, check whether a value of session_role is potentially dangerous. It makes sense to use no only when SQL injections via session_role are possible.

Notes

Note

• Supports check_mode.
• 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

community.postgresql.postgresql_info

The official documentation on the community.postgresql.postgresql_info module.

Examples

# PostgreSQL ping dbsrv server from the shell:
# ansible dbsrv -m postgresql_ping

# In the example below you need to generate certificates previously.
# See https://www.postgresql.org/docs/current/libpq-ssl.html for more information.
- name: PostgreSQL ping dbsrv server using not default credentials and ssl
  community.postgresql.postgresql_ping:
    db: protected_db
    login_host: dbsrv
    login_user: secret
    login_password: secret_pass
    ca_cert: /root/root.crt
    ssl_mode: verify-full

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key	Returned	Description
is_available boolean	always	PostgreSQL server availability. Sample: True
server_version dictionary	always	PostgreSQL server version. Sample: {'major': 10, 'minor': 1}

Authors

• Andrew Klychkov (@Andersson007)

© 2012–2018 Michael DeHaan
© 2018–2021 Red Hat, Inc.
Licensed under the GNU General Public License version 3.
https://docs.ansible.com/ansible/2.11/collections/community/postgresql/postgresql_ping_module.html