community.proxysql.proxysql_replication_hostgroups module – Manages replication hostgroups using the proxysql admin interface

Note

This module is part of the community.proxysql collection (version 1.4.0).

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.proxysql.

To use it in a playbook, specify: community.proxysql.proxysql_replication_hostgroups.

Synopsis

  • Each row in mysql_replication_hostgroups represent a pair of writer_hostgroup and reader_hostgroup. ProxySQL will monitor the value of read_only for all the servers in specified hostgroups, and based on the value of read_only will assign the server to the writer or reader hostgroups.

Requirements

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

  • PyMySQL

  • mysqlclient

Parameters

Parameter

Comments

check_type

string

added in 1.3.0 of community.proxysql

Which check type to use when detecting that the node is a standby.

Requires proxysql >= 2.0.1. Otherwise it has no effect.

read_only|innodb_read_only and read_only&innodb_read_only requires proxysql >= 2.0.8.

Choices:

  • read_only ← (default)

  • innodb_read_only

  • super_read_only

  • read_only|innodb_read_only

  • read_only&innodb_read_only

comment

string

Text field that can be used for any purposes defined by the user.

Default: “”

config_file

path

Specify a config file from which login_user and login_password are to be read.

Default: “”

load_to_runtime

boolean

Dynamically load config to runtime memory.

Choices:

  • no

  • yes ← (default)

login_host

string

The host used to connect to ProxySQL admin interface.

Default: “127.0.0.1”

login_password

string

The password used to authenticate to ProxySQL admin interface.

login_port

integer

The port used to connect to ProxySQL admin interface.

Default: 6032

login_unix_socket

string

The socket used to connect to ProxySQL admin interface.

login_user

string

The username used to authenticate to ProxySQL admin interface.

reader_hostgroup

integer / required

Id of the reader hostgroup.

save_to_disk

boolean

Save config to sqlite db on disk to persist the configuration.

Choices:

  • no

  • yes ← (default)

state

string

When present - adds the replication hostgroup, when absent - removes the replication hostgroup.

Choices:

  • present ← (default)

  • absent

writer_hostgroup

integer / required

Id of the writer hostgroup.

Notes

Note

  • Supports check_mode.

Examples

---
# This example adds a replication hostgroup, it saves the mysql server config
# to disk, but avoids loading the mysql server config to runtime (this might be
# because several replication hostgroup are being added and the user wants to
# push the config to runtime in a single batch using the
# community.general.proxysql_manage_config module).  It uses supplied credentials
# to connect to the proxysql admin interface.

- name: Add a replication hostgroup
  community.proxysql.proxysql_replication_hostgroups:
    login_user: 'admin'
    login_password: 'admin'
    writer_hostgroup: 1
    reader_hostgroup: 2
    state: present
    load_to_runtime: False

- name: Change check_type
  community.proxysql.proxysql_replication_hostgroups:
    login_user: 'admin'
    login_password: 'admin'
    writer_hostgroup: 1
    reader_hostgroup: 2
    check_type: innodb_read_only
    state: present
    load_to_runtime: False

# This example removes a replication hostgroup, saves the mysql server config
# to disk, and dynamically loads the mysql server config to runtime.  It uses
# credentials in a supplied config file to connect to the proxysql admin
# interface.

- name: Remove a replication hostgroup
  community.proxysql.proxysql_replication_hostgroups:
    config_file: '~/proxysql.cnf'
    writer_hostgroup: 3
    reader_hostgroup: 4
    state: absent

Return Values

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

Key

Description

stdout

dictionary

The replication hostgroup modified or removed from proxysql.

Returned: On create/update will return the newly modified group, on delete it will return the deleted record.

Sample: {“changed”: true, “msg”: “Added server to mysql_hosts”, “repl_group”: {“check_type”: “read_only”, “comment”: “”, “reader_hostgroup”: “1”, “writer_hostgroup”: “2”}, “state”: “present”}

Authors

  • Ben Mildren (@bmildren)