Heartbeat uses NFS to make MySQL highly available based on CRM

The experimental environment here is the same as that in the previous section http://www.linuxidc.com/Linux/2014-03/98673.htm First stop the node resource , Then delete

NFS Shared storage node configuration ： # mkdir /mydata # vim /etc/exports  /mydata  192.168.100.0/24(no_root_squash,rw) # service nfs restart # groupadd -g 3306 MySQL # useradd -g 3306 -u 3306 -s /sbin/nologin -M mysql # chown -R /mydata notes ： Here you must nfs Shared resources are set to no_root_squash, otherwise mysql Service failed to start

Node Node configuration ： ad locum node1 And node2 The configuration of is exactly the same

# groupadd -g 3306 mysql # useradd -g 3306 -u 3306 -s /sbin/nologin -M mysql # mkdir /mydata # tar xvf mysql-5.5.22-linux2.6-i686.tar.gz -C /usr/local/ # cd /usr/local/ # ln -s mysql-5.5.22-linux2.6-i686/ mysql # cd mysql # chown -R root:mysql . # mount -t nfs 192.168.100.9:/mydata /mydata # cd /usr/local/mysql/ # scripts/mysql_install_db --user=mysql --datadir=/mydata/data # ln -s /usr/local/mysql/bin/* /usr/bin/ # cp support-files/my-large.cnf /etc/my.cnf # vim /etc/my.cnf     datadir = /mydata/data     innodb_file_per_table = 1 # cp support-files/mysql.server /etc/init.d/mysqld # chkconfig --add mysqld # chkconfig mysqld off # service mysqld start # scp /ect/my.cnf node2:/etc # scp /etc/init.d/mysqld node2:/etc/init.d # service mysqld start # mysql

test mysql Whether it is in normal use mysql> create database mydb; mysql> grant all privileges on *.* to [email protected]'%' identified by 'asdasd'; mysql> flush privileges; # service mysqld stop # service heartbeat start # ssh node2 'service heartbeat start' # hb_gui Be careful 1. To use the above command, you must DC Connect and configure , Otherwise, it will fail to start , Check which node is DC, We can use the command crm_mon 2. After the test is completed, the... Of each node must be mysql Set to power on / off , And uninstall nfs Shared memory Add groups and resources , Use the steps in the previous section ：

thus , We can get it from any one mysql The client logs in to us mysql High availability colony 了

Test in nfs The server Log on mysql colony , See if it's all right ： [[email protected] ~]# mysql -uroot -h 192.168.100.10 -p mysql> show databases; +--------------------+ | Database          | +--------------------+ | information_schema | | mydb              | | mysql              | | performance_schema | | test              | +--------------------+ 5 rows in set (0.01 sec)

mysql> use mydb; Database changed mysql> create table test1 (     -> id int not null auto_increment primary key,     -> name varchar(20) not null     -> ); Query OK, 0 rows affected (0.11 sec)