ocf_heartbeat_mysql man page

ocf_heartbeat_mysql — Manages a MySQL database instance

Synopsis

mysql [start | stop | status | monitor | promote | demote | meta-data | validate-all]

Description

Resource script for MySQL. May manage a standalone MySQL database, a clone set with externally managed replication, or a complete master/slave replication setup. Note, when master/slave replication is in use, the resource must be setup to use notifications. Set 'notify=true' in the metadata attributes when defining a MySQL master/slave instance.

While managing replication, the default behavior is to use uname -n values in the change master to command. Other IPs can be specified manually by adding a node attribute ${INSTANCE_ATTR_NAME}_mysql_master_IP giving the IP to use for replication. For example, if the mysql primitive you are using is p_mysql, the attribute to set will be p_mysql_mysql_master_IP.

Supported Parameters

binary

Location of the MySQL server binary

(optional, string, default "/usr/bin/safe_mysqld")

client_binary

Location of the MySQL client binary

(optional, string, default "mysql")

config

Configuration file

(optional, string, default "/etc/my.cnf")

datadir

Directory containing databases

(optional, string, default "/var/lib/mysql")

user

User running MySQL daemon

(optional, string, default "mysql")

group

Group running MySQL daemon (for logfile and directory permissions)

(optional, string, default "mysql")

log

The logfile to be used for mysqld.

(optional, string, default "/var/log/mysqld.log")

pid

The pidfile to be used for mysqld.

(optional, string, default "/var/run/mysql/mysqld.pid")

socket

The socket to be used for mysqld.

(optional, string, default "/var/lib/mysql/mysql.sock")

test_table

Table to be tested in monitor statement (in database.table notation)

(optional, string, default "mysql.user")

test_user

MySQL test user, must have select privilege on test_table

(optional, string, default "root")

test_passwd

MySQL test user password

(optional, string, no default)

enable_creation

If the MySQL database does not exist, it will be created

(optional, boolean, default 0)

additional_parameters

Additional parameters which are passed to the mysqld on startup. (e.g. --skip-external-locking or --skip-grant-tables)

(optional, string, no default)

replication_user

MySQL replication user. This user is used for starting and stopping MySQL replication, for setting and resetting the master host, and for setting and unsetting read-only mode. Because of that, this user must have SUPER, REPLICATION SLAVE, REPLICATION CLIENT, PROCESS and RELOAD privileges on all nodes within the cluster. Mandatory if you define a master-slave resource.

(optional, string, default "root")

replication_passwd

MySQL replication password. Used for replication client and slave. Mandatory if you define a master-slave resource.

(optional, string, no default)

replication_port

The port on which the Master MySQL instance is listening.

(optional, string, default "3306")

max_slave_lag

The maximum number of seconds a replication slave is allowed to lag behind its master. Do not set this to zero. What the cluster manager does in case a slave exceeds this maximum lag is determined by the evict_outdated_slaves parameter.

(optional, integer, default 3600)

evict_outdated_slaves

If set to true, any slave which is more than max_slave_lag seconds behind the master has its MySQL instance shut down. If this parameter is set to false in a primitive or clone resource, it is simply ignored. If set to false in a master/slave resource, then exceeding the maximum slave lag will merely push down the master preference so the lagging slave is never promoted to the new master.

(optional, boolean, default false)

reader_attribute

An attribute that the RA can manage to specify whether a node can be read from. This node attribute will be 1 if it's fine to read from the node, and 0 otherwise (for example, when a slave has lagged too far behind the master).

A typical example for the use of this attribute would be to tie a set of IP addresses to MySQL slaves that can be read from.

This parameter is only meaningful in master/slave set configurations.

(unique, optional, string, default "readable")

Supported Actions

This resource agent supports the following actions (operations):

start

Starts the resource. Suggested minimum timeout: 120.

stop

Stops the resource. Suggested minimum timeout: 120.

status

Performs a status check. Suggested minimum timeout: 60.

monitor

Performs a detailed status check. Suggested minimum timeout: 30. Suggested interval: 20.

monitor (Master role)

Performs a detailed status check. Suggested minimum timeout: 30. Suggested interval: 10.

monitor (Slave role)

Performs a detailed status check. Suggested minimum timeout: 30. Suggested interval: 30.

promote

Promotes the resource to the Master role. Suggested minimum timeout: 120.

demote

Demotes the resource to the Slave role. Suggested minimum timeout: 120.

notify

Suggested minimum timeout: 90.

validate-all

Performs a validation of the resource configuration. Suggested minimum timeout: 5.

meta-data

Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5.

Example Crm Shell

The following is an example configuration for a mysql resource using the crm(8) shell:

primitive p_mysql ocf:heartbeat:mysql \
  op monitor depth="0" timeout="30" interval="20" \
  op monitor role="Master" depth="0" timeout="30" interval="10" \
  op monitor role="Slave" depth="0" timeout="30" interval="30"
ms ms_mysql p_mysql \
  meta notify="true" interleave="true"

Example Pcs

The following is an example configuration for a mysql resource using pcs(8)

pcs resource create p_mysql ocf:heartbeat:mysql \
  op monitor depth="0" timeout="30" interval="20" \
  op monitor role="Master" depth="0" timeout="30" interval="10" \
  op monitor role="Slave" depth="0" timeout="30" interval="30" --master

See Also

http://www.linux-ha.org/wiki/mysql_(res…

Author

Linux-HA contributors (see the resource agent source for information about individual authors)

Info

02/09/2016 resource-agents UNKNOWN OCF resource agents