proxysql_backend_servers - Adds or removes mysql hosts from proxysql admin interface.

New in version 2.3.

Synopsis

Options

parameter required default choices comments
comment
 no
Text field that can be used for any purposed defined by the user. Could be a description of what the host stores, a reminder of when the host was added or disabled, or a JSON processed by some checker script.
compression
 no
If the value of compression is greater than 0, new connections to that server will use compression. If omitted the proxysql database default for compression is 0.
config_file
 no
Specify a config file from which login_user and login_password are to be read.
hostgroup_id
 no
The hostgroup in which this mysqld instance is included. An instance can be part of one or more hostgroups.
hostname
 yes
The ip address at which the mysqld instance can be contacted.
load_to_runtime
 no True
Dynamically load mysql host config to runtime memory.
login_host
 no 127.0.0.1
The host used to connect to ProxySQL admin interface.
login_password
 no None
The password used to authenticate to ProxySQL admin interface.
login_port
 no 6032
The port used to connect to ProxySQL admin interface.
login_user
 no None
The username used to authenticate to ProxySQL admin interface.
max_connections
 no
The maximum number of connections ProxySQL will open to this backend server. If omitted the proxysql database default for max_connections is 1000.
max_latency_ms
 no
Ping time is monitored regularly. If a host has a ping time greater than max_latency_ms it is excluded from the connection pool (although the server stays ONLINE). If omitted the proxysql database default for max_latency_ms is 0.
max_replication_lag
 no
If greater than 0, ProxySQL will reguarly monitor replication lag. If replication lag goes above max_replication_lag, proxysql will temporarily shun the server until replication catches up. If omitted the proxysql database default for max_replication_lag is 0.
port
 no 3306
The port at which the mysqld instance can be contacted.
save_to_disk
 no True
Save mysql host config to sqlite db on disk to persist the configuration.
state
 no present
  • present
  • absent
When present - adds the host, when absent - removes the host.
status
 no
  • ONLINE
  • OFFLINE_SOFT
  • OFFLINE_HARD
ONLINE - Backend server is fully operational. OFFLINE_SOFT - When a server is put into OFFLINE_SOFT mode, connections are kept in use until the current transaction is completed. This allows to gracefully detach a backend. OFFLINE_HARD - When a server is put into OFFLINE_HARD mode, the existing connections are dropped, while new incoming connections aren't accepted either. If omitted the proxysql database default for status is ONLINE.
use_ssl
 no
If use_ssl is set to True, connections to this server will be made using SSL connections. If omitted the proxysql database default for use_ssl is False.
weight
 no
The bigger the weight of a server relative to other weights, the higher the probability of the server being chosen from the hostgroup. If omitted the proxysql database default for weight is 1.

Examples

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

- proxysql_backend_servers:
    login_user: 'admin'
    login_password: 'admin'
    hostname: 'mysql01'
    state: present
    load_to_runtime: False

# This example removes a server, 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.

- proxysql_backend_servers:
    config_file: '~/proxysql.cnf'
    hostname: 'mysql02'
    state: absent

Return Values

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

name description returned type sample
stdout
The mysql host modified or removed from proxysql
 On create/update will return the newly modified host, on delete it will return the deleted record. dict {'msg': 'Added server to mysql_hosts', 'state': 'present', 'changed': True, 'hostname': '192.168.52.1', 'server': {'comment': '', 'status': 'ONLINE', 'compression': '0', 'weight': '1', 'hostname': '192.168.52.1', 'hostgroup_id': '1', 'use_ssl': '0', 'max_connections': '1000', 'port': '3306', 'max_latency_ms': '0', 'max_replication_lag': '0'}}

Status

This module is flagged as stableinterface which means that the maintainers for this module guarantee that no backward incompatible interface changes will be made.

For help in developing on modules, should you be so inclined, please read Community Information & Contributing, Testing Ansible and Developing Modules.

© 2012–2018 Michael DeHaan
© 2018–2019 Red Hat, Inc.
Licensed under the GNU General Public License version 3.
https://docs.ansible.com/ansible/2.4/proxysql_backend_servers_module.html