MySQL master master

MySQL Lord

Prepare the environment

• host

Host name	IP Address 1（ Extranet ）	IP Address 2（ Intranet ）	System	other
mysql-master-01	192.168.72.130	202.207.240.130	CentOS7.5.1804	MEM:2G;CPU:2P/2C;DISK:15G
mysql-master-02	192.168.72.131	202.207.240.131	CentOS7.5.1804	MEM:2G;CPU:2P/2C;DISK:15G

• Configure domain name resolution
• stay mysql-master-01 and mysql-master-02 I'll do it MySQL service

mysql-master-01 Host configuration

• Modify the configuration file /etc/my.cnf

[mysqld]
basedir = /application/mysql
datadir = /application/mysql/data
socket = /tmp/mysql.sock
server_id = 1
log-bin = mysql-bin
binlog-ignore-db = mysql,information_schema
binlog-do-db = master_master
auto_increment_offset = 1
auto_increment_increment = 2
log_bin_trust_function_creators = 1
port = 3306
log_error = /application/mysql/data/error_mysql.err

[mysql]
socket = /tmp/mysql.sock
prompt = wjz [\d]>

Options	function
server_id = 1	mysql-master-01 Node database ID
log-bin = mysql-bin	Turn on log-bin journal
binlog-ignore-db = mysql,information_schema	Ignore the databases of primary replication
binlog-do-db = master_master	Specify which databases the master replicates
auto_increment_offset = 1	This parameter is generally used in master synchronization , Used to stagger self increment , Prevent key value conflicts
auto_increment_increment = 2	This parameter is usually used in master master synchronization , Used to stagger self increment , Prevent key value conflicts
log_bin_trust_function_creators = 1	Copy the function to slaver【 take SQL from mstaer-01 Copied to the mater-02】

• Restart the database service

• Sign in mysql-master-01 Node database , to grant authorization

  Be careful ：IP The address needs to log in to this computer IP Address , Not the machine IP Address

grant replication slave,replication client on *.* to 'repl'@'192.168.72.131' identified by '123456';
flush privileges;
show master status;

mysql-master-02 Host configuration

• Modify the configuration file /etc/my.cnf

[mysqld]
basedir = /application/mysql
datadir = /application/mysql/data
socket = /tmp/mysql.sock
port = 3306
log_error = /application/mysql/data/error_mysql.err
server_id = 2
log-bin = mysql-bin
binlog-ignore-db = mysql,information_schema
binlog-do-db = master_master
auto_increment_offset = 2
auto_increment_increment = 2
log_bin_trust_function_creators = 1

[mysql]
socket = /tmp/mysql.sock
prompt = wjz [\d]>

• Restart the database service
• Sign in mysql-master-02 Node database , to grant authorization

grant replication slave,replication client on *.* to 'repl'@'192.168.72.130' identified by '123456';
flush privileges;
show master status;

To configure mysql-master-02 Sync mysql-master-01

• Sign in mysql-master-02 database , do mysql-master-02 Sync mysql-master-01

stop slave;

change master to master_host='192.168.72.130',master_user='repl',master_password='123456',master_log_file='mysql-bin.000001',master_log_pos=1110;

start slave;

show slave status\G;

To configure mysql-master-01 Sync mysql-master-02

• Sign in mysql-master-01 database , do mysql-master-01 Sync mysql-master-02

stop slave;

change master to master_host='192.168.72.131',master_user='repl',master_password='123456',master_log_file='mysql-bin.000003',master_log_pos=632;

start slave;

show slave status\G;

Verify master configuration

Method ：

1. Log in separately mysql-master-01 and mysql-master-02 database , Select any node to create a database master_master, Check whether the database exists from another node .
2. Select any node , Get into master_master database , Create table , And insert data , View table data on another node , And make changes , Return to the first node to check whether the data has been modified successfully .