community.mysql.mysql_info module – Gather information about MySQL servers

Note

This module is part of the community.mysql collection (version 3.5.1).

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.mysql.

To use it in a playbook, specify: community.mysql.mysql_info.

Synopsis

  • Gathers information about MySQL servers.

Requirements

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

  • mysqlclient (Python 3.5+) or

  • PyMySQL (Python 2.7 and Python 3.x) or

  • MySQLdb (Python 2.x)

Parameters

Parameter

Comments

ca_cert

aliases: ssl_ca

path

The path to a Certificate Authority (CA) certificate. This option, if used, must specify the same certificate as used by the server.

check_hostname

boolean

added in 1.1.0 of community.mysql

Whether to validate the server host name when an SSL connection is required. Corresponds to MySQL CLIs --ssl switch.

Setting this to false disables hostname verification. Use with caution.

Requires pymysql >= 0.7.11.

This option has no effect on MySQLdb.

Choices:

  • no

  • yes

client_cert

aliases: ssl_cert

path

The path to a client public key certificate.

client_key

aliases: ssl_key

path

The path to the client private key.

config_file

path

Specify a config file from which user and password are to be read.

The default config file, ~/.my.cnf, if it exists, will be read, even if config_file is not specified.

The default config file, ~/.my.cnf, if it exists, must contain a [client] section as a MySQL connector requirement.

To prevent the default config file from being read, set config_file to be an empty string.

Default: “~/.my.cnf”

connect_timeout

integer

The connection timeout when connecting to the MySQL server.

Default: 30

exclude_fields

list / elements=string

added in 0.1.0 of community.mysql

List of fields which are not needed to collect.

Supports elements: db_size. Unsupported elements will be ignored.

filter

list / elements=string

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

Allowable values are version, databases, settings, global_status, users, engines, master_status, slave_status, slave_hosts.

By default, collects all subsets.

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,version, the excluding values, !settings in this case, will be ignored.

login_db

string

Database name to connect to.

It makes sense if login_user is allowed to connect to a specific database only.

login_host

string

Host running the database.

In some cases for local connections the login_unix_socket=/path/to/mysqld/socket, that is usually /var/run/mysqld/mysqld.sock, needs to be used instead of login_host=localhost.

Default: “localhost”

login_password

string

The password used to authenticate with.

login_port

integer

Port of the MySQL server. Requires login_host be defined as other than localhost if login_port is used.

Default: 3306

login_unix_socket

string

The path to a Unix domain socket for local connections.

Use this parameter to avoid the Please explicitly state intended protocol error.

login_user

string

The username used to authenticate with.

return_empty_dbs

boolean

Includes names of empty databases to returned dictionary.

Choices:

  • no ← (default)

  • yes

Notes

Note

  • Calculating the size of a database might be slow, depending on the number and size of tables in it. To avoid this, use exclude_fields=db_size.

  • Supports check_mode.

  • To avoid the Please explicitly state intended protocol error, use the login_unix_socket argument, for example, login_unix_socket: /run/mysqld/mysqld.sock.

  • Requires the PyMySQL (Python 2.7 and Python 3.X) or MySQL-python (Python 2.X) package installed on the remote host. The Python package may be installed with apt-get install python-pymysql (Ubuntu; see ansible.builtin.apt) or yum install python2-PyMySQL (RHEL/CentOS/Fedora; see ansible.builtin.yum). You can also use dnf install python2-PyMySQL for newer versions of Fedora; see ansible.builtin.dnf.

  • Be sure you have mysqlclient, PyMySQL, or MySQLdb library installed on the target machine for the Python interpreter Ansible discovers. For example if ansible discovers and uses Python 3, you need to install the Python 3 version of PyMySQL or mysqlclient. If ansible discovers and uses Python 2, you need to install the Python 2 version of either PyMySQL or MySQL-python.

  • If you have trouble, it may help to force Ansible to use the Python interpreter you need by specifying ansible_python_interpreter. For more information, see https://docs.ansible.com/ansible/latest/reference_appendices/interpreter_discovery.html.

  • Both login_password and login_user are required when you are passing credentials. If none are present, the module will attempt to read the credentials from ~/.my.cnf, and finally fall back to using the MySQL default login of ‘root’ with no password.

  • If there are problems with local connections, using login_unix_socket=/path/to/mysqld/socket instead of login_host=localhost might help. As an example, the default MariaDB installation of version 10.4 and later uses the unix_socket authentication plugin by default that without using login_unix_socket=/var/run/mysqld/mysqld.sock (the default path) causes the error Host '127.0.0.1' is not allowed to connect to this MariaDB server.

  • Alternatively, you can use the mysqlclient library instead of MySQL-python (MySQLdb) which supports both Python 2.X and Python >=3.5. See https://pypi.org/project/mysqlclient/ how to install it.

  • If credentials from the config file (for example, /root/.my.cnf) are not needed to connect to a database server, but the file exists and does not contain a [client] section, before any other valid directives, it will be read and this will cause the connection to fail, to prevent this set it to an empty string, (for example config_file: '').

See Also

See also

community.mysql.mysql_variables

The official documentation on the community.mysql.mysql_variables module.

community.mysql.mysql_db

The official documentation on the community.mysql.mysql_db module.

community.mysql.mysql_user

The official documentation on the community.mysql.mysql_user module.

community.mysql.mysql_replication

The official documentation on the community.mysql.mysql_replication module.

Examples

# Display info from mysql-hosts group (using creds from ~/.my.cnf to connect):
# ansible mysql-hosts -m mysql_info

# Display only databases and users info:
# ansible mysql-hosts -m mysql_info -a 'filter=databases,users'

# Display only slave status:
# ansible standby -m mysql_info -a 'filter=slave_status'

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

# If you encounter the "Please explicitly state intended protocol" error,
# use the login_unix_socket argument
- name: Collect all possible information using passwordless root access
  community.mysql.mysql_info:
    login_user: root
    login_unix_socket: /run/mysqld/mysqld.sock

- name: Get MySQL version with non-default credentials
  community.mysql.mysql_info:
    login_user: mysuperuser
    login_password: mysuperpass
    filter: version

- name: Collect all info except settings and users by root
  community.mysql.mysql_info:
    login_user: root
    login_password: rootpass
    filter: "!settings,!users"

- name: Collect info about databases and version using ~/.my.cnf as a credential file
  become: yes
  community.mysql.mysql_info:
    filter:
    - databases
    - version

- name: Collect info about databases and version using ~alice/.my.cnf as a credential file
  become: yes
  community.mysql.mysql_info:
    config_file: /home/alice/.my.cnf
    filter:
    - databases
    - version

- name: Collect info about databases including empty and excluding their sizes
  become: yes
  community.mysql.mysql_info:
    config_file: /home/alice/.my.cnf
    filter:
    - databases
    exclude_fields: db_size
    return_empty_dbs: yes

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: if not excluded by filter

Sample: [{“information_schema”: {“size”: 73728}, “mysql”: {“size”: 656594}}]

size

dictionary

Database size in bytes.

Returned: if not excluded by filter

Sample: {“size”: 656594}

engines

dictionary

Information about the server’s storage engines.

Returned: if not excluded by filter

Sample: [{“CSV”: {“Comment”: “CSV storage engine”, “Savepoints”: “NO”, “Support”: “YES”, “Transactions”: “NO”, “XA”: “NO”}}]

global_status

dictionary

Global status information.

Returned: if not excluded by filter

Sample: [{“Innodb_buffer_pool_read_requests”: 123, “Innodb_buffer_pool_reads”: 32}]

master_status

dictionary

Master status information.

Returned: if master

Sample: [{“Binlog_Do_DB”: “”, “Binlog_Ignore_DB”: “mysql”, “File”: “mysql-bin.000001”, “Position”: 769}]

settings

dictionary

Global settings (variables) information.

Returned: if not excluded by filter

Sample: [{“innodb_open_files”: 300, “innodb_page_size\””: 16384}]

slave_hosts

dictionary

Slave status information.

Returned: if master

Sample: [{“2”: {“Host”: “”, “Master_id”: 1, “Port”: 3306}}]

slave_status

dictionary

Slave status information.

Returned: if standby

Sample: [{“192.168.1.101”: {“3306”: {“replication_user”: {“Connect_Retry”: 60, “Exec_Master_Log_Pos”: 769, “Last_Errno”: 0}}}}]

users

dictionary

Users information.

Returned: if not excluded by filter

Sample: [{“localhost”: {“root”: {“Alter_priv”: “Y”, “Alter_routine_priv”: “Y”}}}]

version

dictionary

Database server version.

Returned: if not excluded by filter

Sample: {“version”: {“full”: “5.5.60-MariaDB”, “major”: 5, “minor”: 5, “release”: 60, “suffix”: “MariaDB”}}

full

string

Full server version.

Returned: if not excluded by filter

Sample: “5.5.60-MariaDB”

major

integer

Major server version.

Returned: if not excluded by filter

Sample: 5

minor

integer

Minor server version.

Returned: if not excluded by filter

Sample: 5

release

integer

Release server version.

Returned: if not excluded by filter

Sample: 60

suffix

string

Server suffix, for example MySQL, MariaDB, other or none.

Returned: if not excluded by filter

Sample: “MariaDB”

Authors

  • Andrew Klychkov (@Andersson007)

  • Sebastian Gumprich (@rndmh3ro)