MariaDB multi-instance and MariaDB instance

MariaDB multi-instance and MariaDB instance
1. Install MariaDB in yum and start

yum install MariaDB-server
systemctl start mariadb.service

 

2. Create a directory by case and set the owner Group

Store configuration files and databases by case

mkdir -pv /mysqldb/{3306,3307,3308}/{etc,socket,pid,log,data}

 

Set directory owner Group

chown -R mysql.mysql /mysqldb

 

3. Create Database Files

Mysql-e 'show variables like "basedir"; '# query the Mariadb installation directory
Mysql_install_db -- datadir =/mysqldb/3306/data -- user = mysql -- basedir =/usr
Mysql_install_db -- datadir =/mysqldb/3307/data -- user = mysql -- basedir =/usr
Mysql_install_db -- datadir =/mysqldb/3308/data -- user = mysql -- basedir =/usr

 

Iv. Configuration File

cp /etc/my.cnf /mysqldb/3306/etc/cp /etc/my.cnf /mysqldb/3307/etc/cp /etc/my.cnf /mysqldb/3308/etc/

Modify configuration file

The same is true for 3307 3308. You need to change the port and directory location.

5. service scripts

#! /Bin/bashport = 3306mysql_user = "root" mysql_pwd = "" cmd_path = "/usr/bin" # You can use which mysqld_safe to query metrics = "/mysqldb" mysql_sock = "$ {metrics }/$ {port}/socket/mysql. sock "function_start_mysql () {if [! -E "$ mysql_sock"]; then printf "Starting MySQL... \ n "$ {export _path}/mysqld_safe -- defaults-file =$ {mysql_basedir}/$ {port}/etc/my. cnf &>/dev/null & else printf "MySQL is running... \ n "exit fi} function_stop_mysql () {if [! -E "$ mysql_sock"]; then printf "MySQL is stopped... \ n "exit else printf" Stoping MySQL... \ n "$ {cmd_path}/mysqladmin-u $ {mysql_user}-p $ {mysql_pwd}-S $ {mysql_sock} shutdown fi} function_restart_mysql () {printf "Restarting MySQL... \ n "function_stop_mysql sleep 2 function_start_mysql} case $1 instart) function_start_mysql; stop) function_stop_mysql; restart) function_restart_mysql; *) printf" Usage: $ {mysql_basedir}/$ {port}/bin/mysqld {start | stop | restart} \ n "esac

Set permissions

The same is true for 3307,3308. You need to change the port number.

 

6. Start the Service (pay attention to the need to stop the Mariadb service in the Multi-case column to prevent conflicts)

/mysqldb/3306/mysqld start/mysqldb/3307/mysqld start/mysqldb/3308/mysqld start

 

VII. test connection

mysql -S /mysqldb/3306/socket/mysql.sock

mysql -S /mysqldb/3307/socket/mysql.sock

mysql -S /mysqldb/3308/socket/mysql.sock