community.postgresql.postgresql_info module – Gather information about PostgreSQL servers

Note

This module is part of the community.postgresql collection (version 2.1.5).

You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

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

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

Synopsis

  • Gathers information about PostgreSQL servers.

Requirements

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

  • psycopg2

Parameters

Parameter

Comments

ca_cert

aliases: ssl_rootcert

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.

db

aliases: login_db

string

Name of database to connect.

filter

list / elements=string

Limit the collected information by comma separated string or YAML list.

Allowable values are version, databases, in_recovery, settings, tablespaces, roles, replications, repl_slots.

By default, collects all subsets.

You can use shell-style (fnmatch) wildcard to pass groups of values (see Examples).

You can use ‘!’ before value (for example, !settings) to exclude it from the information.

If you pass including and excluding values to the filter, for example, filter=!settings,ver, the excluding values will be ignored.

login_host

string

Host running the database.

If you have connection issues when using localhost, try to use 127.0.0.1 instead.

login_password

string

The password this module should use to establish its PostgreSQL session.

login_unix_socket

string

Path to a Unix domain socket for local connections.

login_user

string

The username this module should use to establish its PostgreSQL session.

Default: “postgres”

port

aliases: login_port

integer

Database port to connect to.

Default: 5432

session_role

string

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

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.

Choices:

  • allow

  • disable

  • prefer ← (default)

  • require

  • verify-ca

  • verify-full

trust_input

boolean

added in 0.2.0 of community.postgresql

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.

Choices:

  • no

  • yes ← (default)

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_ping

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

Examples

# Display info from postgres hosts.
# ansible postgres -m postgresql_info

# Display only databases and roles info from all hosts using shell-style wildcards:
# ansible all -m postgresql_info -a 'filter=dat*,rol*'

# Display only replications and repl_slots info from standby hosts using shell-style wildcards:
# ansible standby -m postgresql_info -a 'filter=repl*'

# Display all info from databases hosts except settings:
# ansible databases -m postgresql_info -a 'filter=!settings'

- name: Collect PostgreSQL version and extensions
  become: yes
  become_user: postgres
  community.postgresql.postgresql_info:
    filter: ver*,ext*

- name: Collect all info except settings and roles
  become: yes
  become_user: postgres
  community.postgresql.postgresql_info:
    filter: "!settings,!roles"

# On FreeBSD with PostgreSQL 9.5 version and lower use pgsql user to become
# and pass "postgres" as a database to connect to
- name: Collect tablespaces and repl_slots info
  become: yes
  become_user: pgsql
  community.postgresql.postgresql_info:
    db: postgres
    filter:
    - tablesp*
    - repl_sl*

- name: Collect all info except databases
  become: yes
  become_user: postgres
  community.postgresql.postgresql_info:
    filter:
    - "!databases"

Return Values

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

Key

Description

databases

dictionary

Information about databases.

Returned: always

Sample: [{“postgres”: {“access_priv”: “”, “collate”: “en_US.UTF-8”, “ctype”: “en_US.UTF-8”, “encoding”: “UTF8”, “owner”: “postgres”, “size”: “7997 kB”}}]

database_name

dictionary

Database name.

Returned: always

Sample: “template1”

access_priv

string

Database access privileges.

Returned: always

Sample: “=c/postgres_npostgres=CTc/postgres”

collate

string

Database collation https://www.postgresql.org/docs/current/collation.html.

Returned: always

Sample: “en_US.UTF-8”

ctype

string

Database LC_CTYPE https://www.postgresql.org/docs/current/multibyte.html.

Returned: always

Sample: “en_US.UTF-8”

encoding

string

Database encoding https://www.postgresql.org/docs/current/multibyte.html.

Returned: always

Sample: “UTF8”

extensions

dictionary

Extensions https://www.postgresql.org/docs/current/sql-createextension.html.

Returned: always

Sample: [{“plpgsql”: {“description”: “PL/pgSQL procedural language”, “extversion”: {“major”: 1, “minor”: 0, “raw”: “1.0”}}}]

extdescription

string

Extension description.

Returned: if existent

Sample: “PL/pgSQL procedural language”

extversion

dictionary

Extension description.

Returned: always

major

integer

Extension major version.

Returned: always

Sample: 1

minor

integer

Extension minor version.

Returned: always

Sample: 0

raw

string

Extension full version.

Returned: always

Sample: “1.0”

nspname

string

Namespace where the extension is.

Returned: always

Sample: “pg_catalog”

languages

dictionary

Procedural languages https://www.postgresql.org/docs/current/xplang.html.

Returned: always

Sample: {“sql”: {“lanacl”: “”, “lanowner”: “postgres”}}

lanacl

string

Language access privileges https://www.postgresql.org/docs/current/catalog-pg-language.html.

Returned: always

Sample: “{postgres=UC/postgres,=U/postgres}”

lanowner

string

Language owner https://www.postgresql.org/docs/current/catalog-pg-language.html.

Returned: always

Sample: “postgres”

namespaces

dictionary

Namespaces (schema) https://www.postgresql.org/docs/current/sql-createschema.html.

Returned: always

Sample: {“pg_catalog”: {“nspacl”: “{postgres=UC/postgres,=U/postgres}”, “nspowner”: “postgres”}}

nspacl

string

Access privileges https://www.postgresql.org/docs/current/catalog-pg-namespace.html.

Returned: always

Sample: “{postgres=UC/postgres,=U/postgres}”

nspowner

string

Schema owner https://www.postgresql.org/docs/current/catalog-pg-namespace.html.

Returned: always

Sample: “postgres”

owner

string

Database owner https://www.postgresql.org/docs/current/sql-createdatabase.html.

Returned: always

Sample: “postgres”

publications

dictionary

added in 0.2.0 of community.postgresql

Information about logical replication publications (available for PostgreSQL 10 and higher) https://www.postgresql.org/docs/current/logical-replication-publication.html.

Content depends on PostgreSQL server version.

Returned: if configured

Sample: {“pub1”: {“ownername”: “postgres”, “puballtables”: true, “pubinsert”: true, “pubupdate”: true}}

size

string

Database size in bytes.

Returned: always

Sample: 8189415

subscriptions

dictionary

added in 0.2.0 of community.postgresql

Information about replication subscriptions (available for PostgreSQL 10 and higher) https://www.postgresql.org/docs/current/logical-replication-subscription.html.

Content depends on PostgreSQL server version.

Returned: if configured

Sample: [{“my_subscription”: {“ownername”: “postgres”, “subenabled”: true, “subpublications”: [“first_publication”]}}]

in_recovery

boolean

Indicates if the service is in recovery mode or not.

Returned: always

Sample: false

pending_restart_settings

list / elements=string

List of settings that are pending restart to be set.

Returned: always

Sample: [“shared_buffers”]

repl_slots

dictionary

Replication slots (available in 9.4 and later) https://www.postgresql.org/docs/current/view-pg-replication-slots.html.

Returned: if existent

Sample: {“slot0”: {“active”: false, “database”: null, “plugin”: null, “slot_type”: “physical”}}

active

boolean

True means that a receiver has connected to it, and it is currently reserving archives.

Returned: always

Sample: true

database

string

Database name this slot is associated with, or null.

Returned: always

Sample: “acme”

plugin

string

Base name of the shared object containing the output plugin this logical slot is using, or null for physical slots.

Returned: always

Sample: “pgoutput”

slot_type

string

The slot type - physical or logical.

Returned: always

Sample: “logical”

replications

dictionary

Information about the current replications by process PIDs https://www.postgresql.org/docs/current/monitoring-stats.html#MONITORING-STATS-VIEWS-TABLE.

Returned: if pg_stat_replication view existent

Sample: [{“76580”: {“app_name”: “standby1”, “backend_start”: “2019-02-03 00:14:33.908593+03”, “client_addr”: “10.10.10.2”, “client_hostname”: “”, “state”: “streaming”, “usename”: “postgres”}}]

app_name

string

Name of the application that is connected to this WAL sender.

Returned: if existent

Sample: “acme_srv”

backend_start

string

Time when this process was started, i.e., when the client connected to this WAL sender.

Returned: always

Sample: “2019-02-03 00:14:33.908593+03”

client_addr

string

IP address of the client connected to this WAL sender.

If this field is null, it indicates that the client is connected via a Unix socket on the server machine.

Returned: always

Sample: “10.0.0.101”

client_hostname

string

Host name of the connected client, as reported by a reverse DNS lookup of client_addr.

This field will only be non-null for IP connections, and only when log_hostname is enabled.

Returned: always

Sample: “dbsrv1”

state

string

Current WAL sender state.

Returned: always

Sample: “streaming”

usename

string

Name of the user logged into this WAL sender process (‘usename’ is a column name in pg_stat_replication view).

Returned: always

Sample: “replication_user”

roles

dictionary

Information about roles https://www.postgresql.org/docs/current/user-manag.html.

Returned: always

Sample: [{“test_role”: {“canlogin”: true, “member_of”: [“user_ro”], “superuser”: false, “valid_until”: “9999-12-31T23:59:59.999999+00:00”}}]

canlogin

boolean

Login privilege https://www.postgresql.org/docs/current/role-attributes.html.

Returned: always

Sample: true

member_of

list / elements=string

Role membership https://www.postgresql.org/docs/current/role-membership.html.

Returned: always

Sample: [“read_only_users”]

superuser

boolean

User is a superuser or not.

Returned: always

Sample: false

valid_until

string

Password expiration date https://www.postgresql.org/docs/current/sql-alterrole.html.

Returned: always

Sample: “9999-12-31T23:59:59.999999+00:00”

settings

dictionary

Information about run-time server parameters https://www.postgresql.org/docs/current/view-pg-settings.html.

Returned: always

Sample: [{“work_mem”: {“boot_val”: “4096”, “context”: “user”, “max_val”: “2147483647”, “min_val”: “64”, “setting”: “8192”, “sourcefile”: “/var/lib/pgsql/10/data/postgresql.auto.conf”, “unit”: “kB”, “val_in_bytes”: 4194304, “vartype”: “integer”}}]

boot_val

string

Parameter value assumed at server startup if the parameter is not otherwise set.

Returned: always

Sample: 4096

context

string

Context required to set the parameter’s value.

For more information see https://www.postgresql.org/docs/current/view-pg-settings.html.

Returned: always

Sample: “user”

max_val

string

Maximum allowed value of the parameter (null for non-numeric values).

Returned: always

Sample: 2147483647

min_val

string

Minimum allowed value of the parameter (null for non-numeric values).

Returned: always

Sample: 64

pending_restart

boolean

True if the value has been changed in the configuration file but needs a restart; or false otherwise.

Returns only if settings is passed.

Returned: always

Sample: false

pretty_val

string

Value presented in the pretty form.

Returned: always

Sample: “2MB”

setting

string

Current value of the parameter.

Returned: always

Sample: 49152

sourcefile

string

Configuration file the current value was set in.

Null for values set from sources other than configuration files, or when examined by a user who is neither a superuser or a member of pg_read_all_settings.

Helpful when using include directives in configuration files.

Returned: always

Sample: “/var/lib/pgsql/10/data/postgresql.auto.conf”

unit

string

Implicit unit of the parameter.

Returned: always

Sample: “kB”

val_in_bytes

integer

Current value of the parameter in bytes.

Returned: if supported

Sample: 2147483647

vartype

string

Parameter type (bool, enum, integer, real, or string).

Returned: always

Sample: “integer”

tablespaces

dictionary

Information about tablespaces https://www.postgresql.org/docs/current/catalog-pg-tablespace.html.

Returned: always

Sample: [{“test”: {“spcacl”: “{postgres=C/postgres,andreyk=C/postgres}”, “spcoptions”: [“seq_page_cost=1”], “spcowner”: “postgres”}}]

spcacl

string

Tablespace access privileges.

Returned: always

Sample: “{postgres=C/postgres,andreyk=C/postgres}”

spcoptions

list / elements=string

Tablespace-level options.

Returned: always

Sample: [“seq_page_cost=1”]

spcowner

string

Owner of the tablespace.

Returned: always

Sample: “test_user”

version

dictionary

Database server version https://www.postgresql.org/support/versioning/.

Returned: always

Sample: {“version”: {“major”: 10, “minor”: 6}}

full

string

added in 1.2.0 of community.postgresql

Full server version.

Returned: always

Sample: “13.2”

major

integer

Major server version.

Returned: always

Sample: 11

minor

integer

Minor server version.

Returned: always

Sample: 1

patch

integer

added in 1.2.0 of community.postgresql

Patch server version.

Returned: if supported

Sample: 5

raw

string

added in 1.2.0 of community.postgresql

Full output returned by SELECT version().

Returned: always

Sample: “PostgreSQL 13.2 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 10.2.1 20201125 (Red Hat 10.2.1-9), 64-bit”

Authors

  • Andrew Klychkov (@Andersson007)