mysql 多实例部署

centos7.6 部署3个mariadb 实例

[root@localhost ~]# yum install mariadb-server -y

# 创建对应的目录文件
[root@localhost ~]# mkdir /mysql/{3306,3307,3308}/{data,etc,socket,log,bin,pid} -p

chown -r mysql.mysql /mysql

# 初始化数据库文件
[root@localhost ~]# mysql_install_db --datadir=/mysql/3306/data/ --user=mysql
[root@localhost ~]# mysql_install_db --datadir=/mysql/3307/data/ --user=mysql
[root@localhost ~]# mysql_install_db --datadir=/mysql/3308/data/ --user=mysql

# 创建对应配置文件
[root@localhost ~]# cp /etc/my.cnf /mysql/3306/etc
# 修改对应的配置文件
[mysqld]
port=3306
datadir=/mysql/3306/data
socket=/mysql/3306/socket/mysql.sock
symbolic-links=0

[mysqld_safe]
log-error=/mysql/3306/log/mariadb.log
pid-file=/mysql/3306/pid/mariadb.pid

# 另外的2个实例调整对应的端口即可

# 准备启动脚本 另外的实例修改对应的端口即可
[root@localhost ~]#  vim /mysql/3306/bin/mysqld
#!/bin/bash
#chkconfig: 345 80 2
port=3306
mysql_user="root"
mysql_pwd=""
cmd_path="/usr/bin"
mysql_basedir="/mysql"
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

# 启动服务
[root@localhost ~]# /mysql/3306/bin/mysqld start
starting mysql...
[root@localhost ~]# /mysql/3307/bin/mysqld start
starting mysql...
[root@localhost ~]# /mysql/3308/bin/mysqld start
starting mysql...

# 连接测试
mysql -s /mysql/3308/socket/mysql.sock -e 'select version()'
+----------------+
| version()      |
+----------------+
| 5.5.60-mariadb |
+----------------+

# 关闭数据库
[root@localhost ~]# /mysql/3306/bin/mysqld stop
stoping mysql...
enter password: