mysql利用mysqld_multi部署单机多实例

作者 : IT 大叔 本文共4204个字,预计阅读时间需要11分钟 发布时间: 2020-12-25

近期博客更新不及时,是因为工作有了大的变动,今天分享个工作中遇到的一个小问题。

随着硬件层面的发展,linux系统多核已经是普通趋势,而mysql是单进程多线程,所以先天上对多进程的利用不是很高,虽然5.6版本已经在这方面改进很多,但是也没有达到100%,所以为了充分的利用系统资源,mysql有自己的补充,那就是可以部署多实例,一个实例一个端口。

一、mysql编译安装:

cd /usr/local/src

wget http://mirrors.sohu.com/mysql/MySQL-5.6/mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz 

tar zxvf mysql-5.6.35-linux-glibc2.5-x86_64.tar.gz

mv mysql-5.6.35-linux-glibc2.5-x86_64 /usr/local/mysql

cd /usr/local/mysql

useradd mysql

mkdir -p /data/mysql

chown -R mysql:mysql /data/mysql

./scripts/mysql_install_db --user=mysql --datadir=/data/mysql

cp support-files/my-default.cnf  /etc/my.cnf

cp support-files/mysql.server /etc/init.d/mysqld

二、准备第一个多实例3307

2.1 创建目录:
mkdir /usr/local/mysql3307

chown -R mysql.mysql /usr/local/mysql3307/


mkdir -p /data/mysql3307

chown -R mysql.mysql /data/mysql3307


mkdir -p /home/data/mysql3307/binlog

chown -R mysql.mysql /home/data/mysql3307
2.2 配置文件
[[email protected] ~]# vim /etc/my.cnf

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.

[mysqld_multi]

mysqld = /usr/local/mysql/bin/mysqld_safe

mysqladmin =/usr/local/mysql/bin/mysqladmin

log =/var/log/mysqld_multi.log

[mysqld1]

socket = /usr/local/mysql3307/mysql.sock
port = 3307
pid-file = /usr/local/mysql3307/mysql.pid
datadir = /data/mysql3307

log_bin=/home/data/mysql3307/binlog

server-id = 1

innodb_buffer_pool_size = 128M

innodb_flush_log_at_trx_commit = 0
2.3 初始化数据库
/usr/local/mysql/scripts/mysql_install_db --user=mysql  --basedir=/usr/local/mysql --datadir=/data/mysql3307

三、准备第二个多实例3308

3.1 创建目录:
mkdir /usr/local/mysql3308

chown -R mysql.mysql /usr/local/mysql3308/


mkdir -p /data/mysql3308

chown -R mysql.mysql /data/mysql3308


mkdir -p /home/data/mysql3308/binlog

chown -R mysql.mysql /home/data/mysql3308
3.2 配置文件
[[email protected] ~]# vim /etc/my.cnf

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld_multi]

mysqld = /usr/local/mysql/bin/mysqld_safe

mysqladmin =/usr/local/mysql/bin/mysqladmin

log =/var/log/mysqld_multi.log

[mysqld1]

socket = /usr/local/mysql3307/mysql.sock
port = 3307
pid-file = /usr/local/mysql3307/mysql.pid
datadir = /data/mysql3307

log_bin=/home/data/mysql3307/binlog

server-id = 1

innodb_buffer_pool_size = 128M

innodb_flush_log_at_trx_commit = 0


[mysqld2]

socket = /usr/local/mysql3308/mysql.sock
port = 3308
pid-file = /usr/local/mysql3308/mysql.pid
datadir = /data/mysql3308

log_bin=/home/data/mysql3308/binlog

server-id = 2

innodb_buffer_pool_size = 128M

innodb_flush_log_at_trx_commit = 0
3.3 初始化数据库
/usr/local/mysql/scripts/mysql_install_db --user=mysql  --basedir=/usr/local/mysql --datadir=/data/mysql3308

四、启动多实例

/etc/init.d/mysqld start

mysqld_multi --defaults-extra-file=/etc/my.cnf start 1,2

[[email protected] bin]# !net
netstat -lntp -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1241/sshd           
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      2087/master         
tcp6       0      0 :::3306                 :::*                    LISTEN      4406/mysqld         
tcp6       0      0 :::3307                 :::*                    LISTEN      4197/mysqld         
tcp6       0      0 :::3308                 :::*                    LISTEN      3359/mysqld         
tcp6       0      0 :::8080                 :::*                    LISTEN      2222/java           
tcp6       0      0 :::22                   :::*                    LISTEN      1241/sshd           
tcp6       0      0 ::1:25                  :::*                    LISTEN      2087/master

五、查看启动状态

[[email protected] bin]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is running
MySQL server from group: mysqld2 is running

六、停止多实例

[[email protected] bin]# mysqld_multi --defaults-extra-file=/etc/my.cnf stop 1,2

[[email protected] bin]# mysqld_multi --defaults-extra-file=/etc/my.cnf report
Reporting MySQL servers
MySQL server from group: mysqld1 is not running
MySQL server from group: mysqld2 is not running

七、各自登录mysql实例

[[email protected] bin]# mysql --socket=/usr/local/mysql3307/mysql.sock
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.35-log MySQL Community Server (GPL)

Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

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