MySQL-----多實例配置

1.1 MySQL實例---多實例配置

1.1.1 多實例概述

多套后臺進程+線程+內存結構

多個端口，多個配置文件，多個日志文件，多個socket，多個server_id

多套數據

##PS:安裝多實例前，首先確保MySQL數據庫已安裝，mysql安裝參考：https://blog.51cto.com/zhuzhiwei/2140683

1.1.2 準備多套配置文件

mkdir -p /data/330{7..9}           #<=====創建多個目錄

================第一個實例===================

vim /data/3307/my.cnf

[mysqld]

basedir=/application/mysql

datadir=/data/3307/data

socket=/data/3307/mysql.sock

log-error=/data/3307/mysql.log

log-bin=/data/3307/mysql-bin

server-id=7

port=3307

[client]

socket=/data/3307/mysql.sock

================第二個實例===================

vim /data/3308/my.cnf

[mysqld]

basedir=/application/mysql

datadir=/data/3308/data

socket=/data/3308/mysql.sock

log-error=/data/3308/mysql.log

log-bin=/data/3308/mysql-bin

server-id=8

port=3308

[client]

socket=/data/3308/mysql.sock

================第三個實例===================

vim /data/3309/my.cnf

[mysqld]

basedir=/application/mysql

datadir=/data/3309/data

socket=/data/3309/mysql.sock

log-error=/data/3309/mysql.log

log-bin=/data/3309/mysql-bin

server-id=9

port=3309

[client]

socket=/data/3309/mysql.sock

=========================================

chown -R mysql.mysql /data/330*      #<======將3個目錄授權給mysql用戶

1.1.3 初始化多套數據

/application/mysql/scripts/mysql_install_db --user=mysql --basedir=/application/mysql --datadir=/data/3307/data

=================================================================================

/application/mysql/scripts/mysql_install_db --user=mysql --basedir=/application/mysql --datadir=/data/3308/data

=================================================================================

/application/mysql/scripts/mysql_install_db --user=mysql --basedir=/application/mysql --datadir=/data/3309/data

=================================================================================

1.1.4 啟動多個實例

mysqld_safe --defaults-file=/data/3307/my.cnf &

====================================================================

mysqld_safe --defaults-file=/data/3308/my.cnf &

====================================================================

mysqld_safe --defaults-file=/data/3309/my.cnf &

====================================================================

1.1.5 啟動失敗處理

touch /data/3309/mysql.log

touch /data/3308/mysql.log

touch /data/3307/mysql.log

chown -R mysql.mysql /data/330*

再次啟動多個實例即可。

===============進入實例===============================

mysql  -s   /data/3307/mysql.sock    #首次進入無密碼

mysql  -s   /data/3308/mysql.sock

mysql  -s   /data/3309/mysql.sock