community.mysql.mysql_info – Gather information about MySQL servers

Note

This plugin is part of the community.mysql collection.

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.

  • PyMySQL (Python 2.7 and Python 3.X), or

  • MySQLdb (Python 2.x)

Parameters

Parameter Choices/Defaults Comments
ca_cert
path
The path to a Certificate Authority (CA) certificate. This option, if used, must specify the same certificate as used by the server.

aliases: ssl_ca
check_hostname
boolean
added in 1.1.0 of community.mysql
    Choices:
  • no
  • yes
Whether to validate the server host name when an SSL connection is required.
Setting this to false disables hostname verification. Use with caution.
Requires pymysql >= 0.7.11.
This optoin has no effect on MySQLdb.
client_cert
path
The path to a client public key certificate.

aliases: ssl_cert
client_key
path
The path to the client private key.

aliases: ssl_key
config_file
path
Default:
"~/.my.cnf"
Specify a config file from which user and password are to be read.
connect_timeout
integer
Default:
30
The connection timeout when connecting to the MySQL server.
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
Default:
"localhost"
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.
login_password
string
The password used to authenticate with.
login_port
integer
Default:
3306
Port of the MySQL server. Requires login_host be defined as other than localhost if login_port is used.
login_unix_socket
string
The path to a Unix domain socket for local connections.
login_user
string
The username used to authenticate with.
return_empty_dbs
boolean
    Choices:
  • no ←
  • yes
Includes names of empty databases to returned dictionary.

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.

  • 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 PyMySQL or MySQLdb library installed on the target machine for the Python interpreter Ansible uses, for example, if it is Python 3, you must install the library for Python 3. You can also change the 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.

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'

- name: Collect all possible information using passwordless root access
  community.mysql.mysql_info:
    login_user: root

- 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 Returned Description
databases
dictionary
if not excluded by filter
Information about databases.

Sample:
[{'information_schema': {'size': 73728}, 'mysql': {'size': 656594}}]
 
size
dictionary
if not excluded by filter
Database size in bytes.

Sample:
{'size': 656594}
engines
dictionary
if not excluded by filter
Information about the server's storage engines.

Sample:
[{'CSV': {'Comment': 'CSV storage engine', 'Savepoints': 'NO', 'Support': 'YES', 'Transactions': 'NO', 'XA': 'NO'}}]
global_status
dictionary
if not excluded by filter
Global status information.

Sample:
[{'Innodb_buffer_pool_read_requests': 123, 'Innodb_buffer_pool_reads': 32}]
master_status
dictionary
if master
Master status information.

Sample:
[{'Binlog_Do_DB': '', 'Binlog_Ignore_DB': 'mysql', 'File': 'mysql-bin.000001', 'Position': 769}]
settings
dictionary
if not excluded by filter
Global settings (variables) information.

Sample:
[{'innodb_open_files': 300, 'innodb_page_size"': 16384}]
slave_hosts
dictionary
if master
Slave status information.

Sample:
[{'2': {'Host': '', 'Master_id': 1, 'Port': 3306}}]
slave_status
dictionary
if standby
Slave status information.

Sample:
[{'192.168.1.101': {'3306': {'replication_user': {'Connect_Retry': 60, 'Exec_Master_Log_Pos': 769, 'Last_Errno': 0}}}}]
users
dictionary
if not excluded by filter
Users information.

Sample:
[{'localhost': {'root': {'Alter_priv': 'Y', 'Alter_routine_priv': 'Y'}}}]
version
dictionary
if not excluded by filter
Database server version.

Sample:
{'version': {'major': 5, 'minor': 5, 'release': 60}}
 
major
integer
if not excluded by filter
Major server version.

Sample:
5
 
minor
integer
if not excluded by filter
Minor server version.

Sample:
5
 
release
integer
if not excluded by filter
Release server version.

Sample:
60


Authors

  • Andrew Klychkov (@Andersson007)