MariaDB多实例

yum install MariaDB-server
systemctl start mariadb.service

chown -R mysql.mysql /mysqldb

mysql -e 'show variables like "basedir";'      #查询Mariadb安装目录
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

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

#!/bin/bash

port=3306
mysql_user="root"
mysql_pwd=""
cmd_path="/usr/bin"          #可以用which mysqld_safe查询
mysql_basedir="/mysqldb"
mysql_sock="${mysql_basedir}/${port}/socket/mysql.sock"

function_start_mysql()
{
    if [ ! -e "$mysql_sock" ];then
      printf "Starting MySQL...\n"
      ${cmd_path}/mysqld_safe --defaults-file=${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 in
start)
    function_start_mysql
;;
stop)
    function_stop_mysql
;;
restart)
    function_restart_mysql
;;
*)
    printf "Usage: ${mysql_basedir}/${port}/bin/mysqld {start|stop|restart}\n"
esac

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

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

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

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