Installing MySQL and cluster operation on virtual machine in Linux system

Linux Online installation

One 、mysql Online installation

1. Check to see if... Is already installed Mysql

rpm -qa | grep mysql

No directories

If you see something , You can use the following command to delete （xxx For the full name of the file ） rpm -e xxx

2. Installation steps ( According to the order Input 1-4 command )

1.yum -y install wget

2.wget http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

3.yum -y install mysql57-community-release-el7-10.noarch.rpm

4.yum install mysql-community-server --nogpgcheck

5.service mysqld restart

*6（）. verification  ps  -ef|grep mysql

The display is successful

3. Change Password

Enter the command in turn

1.set global validate_password_length=4;
2.alter user '[email protected]' identified by '199957'
3.GRANT ALL PRIVILEGES ON *.* TO '[email protected]''%' identified by '199957'
4.flush privileges;

Two 、 colony

-I/O Threads : Zhou Zhu monitors the two leaders of the master or the point bni og journal , Once the master node sends the master handover change , that ijo The thread reads the change , then I/O The thread writes the read content to our binary relay log Re
lay in .( Relay logs and binlog Keep the log consistent , And the default is none , Need configuration )

-SQL Threads : Monitor the relay log of the slave node , Once the relay log changes , that SQL The thread reads , analysis , Then redo it from the library .

1. Configure the host

1.1 Edit the file vim. /etc/my.cnf
Insert... At the end

log-bin=mysql-bin
server-id=214

1.2. restart Mysql service mysqld restart

1.3 Create a user on the host

2. Configure slave

2.1 Edit the file vim. /etc/my.cnf*

# relay logs
server-id=111
relay-log=relay-log
relay-log-index=relay-log.index

2.2 Restart slave mysql service mysqld restart

3. Configure the parameters of the template node

3.1 Check the information

3.2 Log in to the slave mysql Type in the command

change master to master_host=‘192.168.23.57’ ,master_user=‘txdev’,master_password=‘txdev’,master_log_file=‘mysql-bin.000001’,master_log_pos=1181;

master_user=‘txdev’,master_password=‘txdev’, The user name and password created by the host

3.3 stay mysql From the plane Restart the replication thread

start slave
show slave status\G;

4.navicar Threaded connection

4.1 verification
a. stay Linux Create... Under connection j09 database
b. Refresh
c. Linux58 Automatically create and Linux Like goose database

========= Cluster diagram