community.mysql.mysql_replication – Manage MySQL replication

Note

This plugin is part of the community.mysql collection (version 1.2.0).

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

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

Synopsis

• Manages MySQL server replication, slave, master status, get and change master host.

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
channel string added in 0.1.0 of community.mysql		Name of replication channel. Multi-source replication is supported from MySQL 5.7. Mutually exclusive with connection_name. For more information see https://dev.mysql.com/doc/refman/8.0/en/replication-multi-source.html.
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.
connection_name string added in 0.1.0 of community.mysql		Name of the master connection. Supported from MariaDB 10.0.1. Mutually exclusive with channel. For more information see https://mariadb.com/kb/en/library/multi-source-replication/.
fail_on_error boolean added in 0.1.0 of community.mysql	Choices: no ← yes	Fails on error when calling mysql.
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.
master_auto_position boolean	Choices: no ← yes	Whether the host uses GTID based replication or not.
master_connect_retry integer		Same as mysql variable.
master_delay integer added in 0.1.0 of community.mysql		Time lag behind the master's state (in seconds). Available from MySQL 5.6. For more information see https://dev.mysql.com/doc/refman/8.0/en/replication-delayed.html.
master_host string		Same as mysql variable.
master_log_file string		Same as mysql variable.
master_log_pos integer		Same as mysql variable.
master_password string		Same as mysql variable.
master_port integer		Same as mysql variable.
master_ssl boolean	Choices: no ← yes	Same as mysql variable.
master_ssl_ca string		Same as mysql variable.
master_ssl_capath string		Same as mysql variable.
master_ssl_cert string		Same as mysql variable.
master_ssl_cipher string		Same as mysql variable.
master_ssl_key string		Same as mysql variable.
master_use_gtid string added in 0.1.0 of community.mysql	Choices: current_pos slave_pos disabled	Configures the slave to use the MariaDB Global Transaction ID. disabled equals MASTER_USE_GTID=no command. To find information about available values see https://mariadb.com/kb/en/library/change-master-to/#master_use_gtid. Available since MariaDB 10.0.2.
master_user string		Same as mysql variable.
mode string	Choices: changemaster getmaster getslave ← startslave stopslave resetmaster resetslave resetslaveall	Module operating mode. Could be changemaster (CHANGE MASTER TO), getmaster (SHOW MASTER STATUS), getslave (SHOW SLAVE STATUS), startslave (START SLAVE), stopslave (STOP SLAVE), resetmaster (RESET MASTER) - supported since community.mysql 0.1.0, resetslave (RESET SLAVE), resetslaveall (RESET SLAVE ALL).
relay_log_file string		Same as mysql variable.
relay_log_pos integer		Same as mysql variable.

Notes

Note

• If an empty value for the parameter of string type is needed, use an empty string.

• 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.

• 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.

See Also

See also

community.mysql.mysql_info

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

MySQL replication reference

Complete reference of the MySQL replication documentation.

MariaDB replication reference

Complete reference of the MariaDB replication documentation.

Examples

- name: Stop mysql slave thread
  community.mysql.mysql_replication:
    mode: stopslave

- name: Get master binlog file name and binlog position
  community.mysql.mysql_replication:
    mode: getmaster

- name: Change master to master server 192.0.2.1 and use binary log 'mysql-bin.000009' with position 4578
  community.mysql.mysql_replication:
    mode: changemaster
    master_host: 192.0.2.1
    master_log_file: mysql-bin.000009
    master_log_pos: 4578

- name: Check slave status using port 3308
  community.mysql.mysql_replication:
    mode: getslave
    login_host: ansible.example.com
    login_port: 3308

- name: On MariaDB change master to use GTID current_pos
  community.mysql.mysql_replication:
    mode: changemaster
    master_use_gtid: current_pos

- name: Change master to use replication delay 3600 seconds
  community.mysql.mysql_replication:
    mode: changemaster
    master_host: 192.0.2.1
    master_delay: 3600

- name: Start MariaDB standby with connection name master-1
  community.mysql.mysql_replication:
    mode: startslave
    connection_name: master-1

- name: Stop replication in channel master-1
  community.mysql.mysql_replication:
    mode: stopslave
    channel: master-1

- name: >
    Run RESET MASTER command which will delete all existing binary log files
    and reset the binary log index file on the master
  community.mysql.mysql_replication:
    mode: resetmaster

- name: Run start slave and fail the task on errors
  community.mysql.mysql_replication:
    mode: startslave
    connection_name: master-1
    fail_on_error: yes

- name: Change master and fail on error (like when slave thread is running)
  community.mysql.mysql_replication:
    mode: changemaster
    fail_on_error: yes

Return Values

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

Key	Returned	Description
queries list / elements=string added in 0.1.0 of community.mysql	always	List of executed queries which modified DB's state. Sample: ["CHANGE MASTER TO MASTER_HOST='master2.example.com',MASTER_PORT=3306"]

Authors

• Balazs Pocze (@banyek)

• Andrew Klychkov (@Andersson007)