MySQL5.6多实例部署

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无论是迫于预算，亦或者是领导要求，多实例的安装也是DBA必须掌握的技术，他的启停和登录方式和单实例安装数据库略有不同，本文记录下如何完成MySQL5.6多实例部署。

首先我们看一下my.cnf和单实例的区分：

[root@HE1 scripts]#

cat /etc/my.cnf

[client]

#port = 3306

#socket = /tmp/mysql.sock

#default-character-set = utf8

[mysql]

#default-character-set = utf8

[mysqld3306]

port = 3306

basedir = /usr/local/mysql

datadir = /data/mysql_3306

socket = /tmp/mysql_3306.sock

slow_query_log_file = /data/mysql_3306/slow.log

log-error = /data/mysql_3306/error.log

log-bin = /data/mysql_3306/mysql-bin

sync_binlog = 1

binlog_format = row

transaction_isolation = REPEATABLE-READ

innodb_buffer_pool_size = 100m

[mysqld3308]

port = 3308

basedir = /usr/local/mysql

datadir = /data/mysql_3308

socket = /tmp/mysql_3308.sock

slow_query_log = 1

slow_query_log_file = /data/mysql_3308/slow.log

log-error = /data/mysql_3308/error.log

long_query_time = 1

log-bin = /data/mysql_3308/mysql-bin

sync_binlog = 1

binlog_cache_size = 4M

default-storage-engine = InnoDB

binlog_format = row

transaction_isolation = REPEATABLE-READ

innodb_buffer_pool_size = 100m

[mysqld_multi]

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

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

[mysqldump]

quick

max_allowed_packet = 32M

可以看出，多实例的my.cnf实际上就是如上所示，本文为了演示实验环境，innodb_buffer_pool_size仅仅开了100m，真实的生产库中多实例部署该参数要开大些，两个实例该参数的值达到内存的50%-80%都可以。

下面开始初始化我们的数据库

首先创建我们的数据目录

[root@HE1 ~]#mkdir -p /data/mysql_3306

[root@HE1 ~]#mkdir -p /data/mysql_3308

[root@HE1 ~]#echo "export PATH=$PATH:/usr/local/mysql/bin:/usr/local/mysql/lib" >>/etc/profile

进入到mysql的scripts文件夹下对数据库进行初始化，这里我们对3306端口数据库进行初始化

1	`[root@HE1 scripts]#./mysql_install_db --basedir=/usr/local/mysql --datadir=/data/mysql_3306 --defaults-file=/etc/my.cnf --user=mysql`

这里我们对3308端口数据库进行初始化

1 2	`[root@HE1` `scripts]# ./mysql_install_db --basedir=/usr/local/mysql --datadir=/data/mysql_3308 --defaults-file=/etc/my.cnf --user=mysql`

初始化完成后，我们便可以启停数据库了，和单实例不同，多实例采用mysqld_multi来启停数据库

[root@HE1 bin]# ./mysqld_multi --defaults-file=/etc/my.cnf --user=root --password=MANAGER start 3306,3308

可以利用mysqld_multi的report命令来检测多实例的运行状况

[root@HE1 bin]#

./mysqld_multi report

Reporting MySQL servers

MySQL server from group: mysqld3306 is running

MySQL server from group: mysqld3308 is running

登录方式和单实例大体相同，不过由于多实例的存在，我们需要指定不同的端口号

[root@HE1 bin]# mysql -uroot -p -P3306 -h 192.168.1.48

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 6 Server version: 5.6.16-log MySQL Community Server (GPL)

2014, 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> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema

|

| 3306db |

| mysql |

| performance_schema

|

| test |

+--------------------+

5 rows in set (0.00 sec)

当然，利用socket文件登录也是可以的

[root@HE1 bin]#mysql -uroot -p -S /data/mysql_3306/mysql_3306.sock

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 7 Server version: 5.6.16-log MySQL Community Server (GPL)

2014, 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> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema

|

| 3306db |

| mysql |

| performance_schema

|

| test |

+--------------------+

5 rows in set (0.00 sec)

这里是登录3308端口数据库

[root@HE1 bin]#mysql -uroot -p -P3308 -h 192.168.1.48

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 8 Server version: 5.6.16-log MySQL Community Server (GPL)

2014, 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.

Type 'help;' or '\h'

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

mysql> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema

|

| 3308db |

| mysql |

| performance_schema

|

| test |

+--------------------+

5 rows in set (0.00sec)

mysql> quit

Bye

利用3308端口的socket文件登录数据库

[root@HE1 bin]#mysql -uroot -p -S /data/mysql_3308/mysql_3308.sock

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 9 Server version: 5.6.16-log MySQL Community Server (GPL)

2014, 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> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema

|

| 3308db |

| mysql |

| performance_schema

|

| test |

+--------------------+

5 rows in set (0.00sec)

至此，MySQL5.6多实例部署完成。

本文出自 “岁伏” 博客，请务必保留此出处http://suifu.blog.51cto.com/9167728/1850560

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