MySQL service 1 master 2 slave, master master, MHA configuration detailed steps

Mysql Master slave configuration method ：

PS： Change database password ：

ALTER USER USER() IDENTIFIED BY "123456";

Master slave construction steps ：

1. Configure on the primary server ：

Enter into my.cnf In the configuration file ：

vim /etc/my.cnf

Enter the following ：

[mysqld]

# The master configuration 

log-bin = mysql-bin

server-id=10

binlog-ignore-db=mysql

binlog_format=mixed

expire_logs_days=10

Restart after configuration mysql

systemctl restart mysql

Access to database ：

mysql -uroot -p123456
# You can also use 
mysql -uroot -p

### Authorized to Slave The server ###

# This server address 
GRANT REPLICATION SLAVE ON *.* to 'test'@'192.168.174.133' identified by 'giiso';

grant all on *.* to [email protected]"%" identified by "123456";

flush privileges;   --- Refresh the permissions 

### Query the status of the primary database ###

mysql> show master status;

2. Slave Library Configure on ：

Also enter the vi /etc/my.cnf In the configuration file , Enter the following ：

# From configuration 
log-bin = mysql-bin
server-id=11

Enter the database ：

### Perform synchronization SQL sentence ###

# Enter the IP Address , and mysql-bin Serial number of 
change master to master_host = '192.168.174.133', master_user = 'rep', master_port=3306, master_password='123456', master_log_file = 'mysql-bin.000002',master_log_pos=120;

### start-up Slave Synchronization process ####

start slave;

#### Master slave synchronization check ####

mysql> show slave status\G

If i0 Thread is no sql Thread is yes

problem 01：

processing method ：

flush logs; Clear the log

mysql> stop slave;

change master to master_log_file='mysql-bin.000001',master_log_pos=120;

mysql> start slave;

1 Lord 2 From the building steps ：

1. Configure on the primary server ：

Follow the previous master-slave replication method

2. The first 1 Slave server configuration ：

Follow the previous master-slave replication method

3. The first 2 Slave server configuration ：

Also enter our my.cnf In the configuration file , Enter the following ：

# From configuration 
log-bin = mysql-bin
server-id=12

### Perform synchronization SQL sentence ###

# Pay attention to our IP The address should be consistent with the main database ,mysql-bin Remember that the modification is consistent with the main database 
change master to master_host = '192.168.174.133', master_user = 'rep', master_port=3306, master_password='123456', master_log_file = 'mysql-bin.000003',master_log_pos=120;

### start-up Slave Synchronization process ####

start slave; 

#### Master slave synchronization check ####

mysql> show slave status\G

Main construction steps ：

It needs to be built on the basis of master-slave ：

1.133 Configure on the primary server ：

Enter into vi /etc/my.cnf The following files are configured inside :

log-bin = mysql-bin
server-id=1
binlog-ignore-db=mysql
auto_increment_increment=2      # Progress value auto_imcrement. Generally speaking, there are n Taiwan leader Mysql Just fill in n
auto_increment_offset=1        # Starting value , Generally fill in the second part n Taiwan leader mysql, This is the second master mysql

Restart mysql：

systemctl restart mysql

2.134 Configure on the primary server ：

Enter into vi /etc/my.cnf The following files are configured inside :

log-bin = mysql-bin
server-id=2
binlog-ignore-db=mysql
auto_increment_increment=2      # Progress value auto_imcrement. Generally speaking, there are n Taiwan leader Mysql Just fill in n
auto_increment_offset=2         # Starting value , Generally fill in the second part n Taiwan leader mysql, This is the second master mysql 

Restart mysql：

systemctl restart mysql

Get into 134 Create an account in the server database ：

GRANT REPLICATION SLAVE ON *.* TO 'sally1'@'%' IDENTIFIED BY '123456';

FLUSH PRIVILEGES;

Create good after , Switch to 133 Server ：

mysql -h 192.168.174.134 -usally1 -p123456
# Pay attention to the change of account 

If you can log in 134 Database , use root Users log in again 133 database , Notice that it's all in 133 Operation on the server

mysql -uroot -p

Before that, check them separately 133 and 134 The database of master Whether the information can come out , Then let's remember 134 Of master Information

show master status;

  We can see here is 505

So we are 133 The authorization operation on the server is Poistion505

CHANGE MASTER TO MASTER_HOST='192.168.174.134', MASTER_USER='sally1', MASTER_PASSWORD='123456', MASTER_LOG_FILE='mysql-bin.000002', MASTER_LOG_POS=505;

start-up slave

start slave;

see 133 and 134 The server slave\G Inside IO and SQL whether YES

show slave status\G

test ： stay 133 and 134 Create databases on the server to see if they can be synchronized

create database ll;

Lord -keepalived Steps to build ：

It needs to be built on the basis of master ：

To configure keepalived High availability , With mysql-01 For example , There are marks where attention should be paid 5.1 install keepalived

yum install keepalived -y          
#( Both need to be installed )

1.133 Configure on the primary server ：

Modify the configuration file

vi /etc/keepalived/keepalived.conf

The contents of the configuration file are as follows ：

! Configuration File for keepalived
global defs {
	notification_email {
		[email protected]
}
	notification_email_from [email protected]
	smtp_server 192.168.174.133
	smtp_connect_timeout 30
	router_id mysql-01		# stay MYSQL-02 Change the configuration to MYSQL
}

vrrp_script check_mysqld {
	script “/etc/keepalived/check_mysql.sh”
	interval 2
weight -2
}

restart mysql

systemctl restart mysql

2.134 Configure on the primary server ：

Modify the configuration file

vi /etc/keepalived/keepalived.conf

The contents of the configuration file are as follows ：

! Configuration File for keepalived
global defs {
	notification_email {
		[email protected]
}
	notification_email_from [email protected]
	smtp_server 192.168.174.133
	smtp_connect_timeout 30
	router_id mysql-02		# stay MYSQL-02 Change the configuration to MYSQL
}

vrrp_script check_mysqld {
	script “/etc/keepalived/check_mysql.sh”
	interval 2
weight -2
}

restart mysql

systemctl restart mysql