Configuration Requirements (Sun Cluster Data Service for MySQL Guide for Solaris OS)

Sun Cluster Data Service for MySQL Guide for Solaris OS

Configuration Requirements

The requirements in this section apply to Sun Cluster HA for MySQL only. You must meet these requirements before you proceed with your Sun Cluster HA for MySQL installation and configuration.

Caution –

Your data service configuration might not be supported if you do not adhere to these requirements.

Components and their Dependencies for Sun Cluster HA for MySQL

MySQL components and their dependencies —You can configure Sun Cluster HA for MySQL data service to protect a MySQL instance and its respective components. The components, and their dependencies between each other, are briefly described below.

Note –

In the above example the Database directory for the MySQL instance 1 is /local/mysql-data-1, whereas the Database directory for the MySQL instance 2 is /local/mysql-data-2.

Table 3 Dependencies for Sun Cluster HA for MySQL


Component	Description
MySQL Server	-> SUNW.LogicalHost resource The SUNW.LogicalHost resource manages the MySQL ip address and ensures, that MySQL is not started until the ip address is up and running.
MySQL Server	-> SUNW.HAStoragePlus resource The SUNW.HAStoragePlus resource manages the MySQL File System Mount points and ensures, that MySQL is not started until these are mounted.

Registration and Configuration File for Sun Cluster HA for MySQL

The MySQL component has two configuration and registration files in /opt/SUNWscmys/util. These files allow you to register the MySQL component with Sun Cluster and prepare a MySQL instance to be registered.

Within these files, the appropriate dependencies have been applied.

Example 3 MySQL configuration and registration file for Sun Cluster

# cd /opt/SUNWscmys
#
# ls -l util
-rwxr-xr-x   1 root     other       1208 Mar 25 13:49 ha_mysql_config
-rwxr-xr-x   1 root     other        820 Mar 25 13:55 ha_mysql_register
-rwxr-xr-x   1 root     other       1105 Apr 16 07:48 mysql_config
-rwxr-xr-x   1 root     other       2993 Apr 11 10:57 mysql_register
#
# more util/*config
::::::::::::::
util/mysql_config
::::::::::::::
#
# Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
# 
# This file will be sourced in by mysql_register and the parameters
# listed below will be used.
#

# Where is mysql installed (BASEDIR)
MYSQL_BASE=

# Mysql admin-user for localhost
MYSQL_USER=

# Password for mysql admin user
MYSQL_PASSWD=

# Configured logicalhost
MYSQL_HOST=

# Specify a username for a faultmonitor user
FMUSER=

# Pick a password for that faultmonitor user
FMPASS=

# Socket name for mysqld ( Should be /tmp/<logical host>.sock )
MYSQL_SOCK=/tmp/<logical host>.sock

# FOR SC3.1 ONLY, Specify the physical hostname for the
# physical NIC that this logicalhostname belongs to for every node in the
# cluster this Resourcegroup can located on.
# IE: The logicalhost lh1 belongs to hme1 for physical-node phys-1 and
# hme3 for  physical-node phys-2. The hostname for hme1 is phys-1-hme1 and
# for hme3 on phys-2 it is phys-2-hme3.
# IE: MYSQL_NIC_HOSTNAME="phys-1-hme1 phys-2-hme3"
MYSQL_NIC_HOSTNAME=""
::::::::::::::
util/ha_mysql_config
::::::::::::::
#
# Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
# 
# This file will be sourced in by ha_mysql_register and the parameters
# listed below will be used.
#
# These parameters can be customized in (key=value) form
#
#        RS - name of the resource for the application
#        RG - name of the resource group containing RS
#   BASEDIR - name of the Mysql bin directory
#   DATADIR - name of the Mysql Data directory
# MYSQLUSER - name of the user Mysql should be started of
#        LH - name of the LogicalHostname SC resource
# MYSQLHOST - name of the host in /etc/hosts
#    FMUSER - name of the Mysql fault monitor user
#    FMPASS - name of the Mysql fault monitor user password
#    LOGDIR - name of the directory mysqld should store it's logfile.
#    CHECK  - should HA-MySQL check MyISAM index files before start YES/NO.
#    HAS_RS - name of the mysql HAStoragePlus SC resource
#
#       The following examples illustrate sample parameters
#       for Mysql
#
#       BASEDIR=/usr/local/mysql
#       DATADIR=/global/mysqldata
#       MYSQLUSER=mysql
#       LH=mysqllh
#       MYSQLHOST=mysqlipname
#       FMUSER=fmuser
#       FMPASS=fmuser
#       LOGDIR=/global/mysqldata/logs
#       CHECK=YES
#

RS=
RG=
BASEDIR=
DATADIR=
MYSQLUSER=
LH=
MYSQLHOST=
FMUSER=
FMPASS=
LOGDIR=
CHECK=
HAS_RS=
#

Explanation of the my.cnf File

my.cnf file — The Sun Cluster HA for MySQL data service provides two sample my.cnf files, one sample file for a master configuration and one for a slave configuration. However, ensure that at least the following parameters are set.

Note –

The my.cnf file is a important file within MySQL. Refer to the MySQL Documentation for complete configuration information on the parameters that follow.

MySQL my.cnf file in [mysqld]section in a master configuration

bind address must be set to the defined logical hosts ip name.
socket is defined as /tmp/<logical hosts ip name>.sock.
binlog-ignore-db contains sc3_test_database, if log-bin option is being used.

MySQL my.cnf file in [mysqld]section in a slave configuration

bind address must be set to the defined logical hosts ip name.
socket is defined as /tmp/<logical hosts ip name>.sock.
binlog-ignore-db contains sc3_test_database if log-bin option is being used.
master—host is the hostname where the master instance resides.
master—user is the username the slave will use for identification to the master.
master—password is the password the slave will use for identification to the master.
master-info-file is the location of the file that remembers where MySQL left off on the master during the replication process. This file must be placed on a GFS/FFS.