Docker安装MySQL集群【读写分离】
Centos7系统Docker安装
目录
目录
1、下载mysql镜像
docker search mysql
docker pull mysql:5.7
docker images
2、创建Master实例并启动
docker run -p 3307:3306 --name mysql-master \
-v /mydata/mysql/master/log:/var/log/mysql \
-v /mydata/mysql/master/data:/var/lib/mysql \
-v /mydata/mysql/master/conf:/etc/mysql \
-e MYSQL_ROOT_PASSWORD=root \
-d mysql:5.7
参数说明
- -p 3307:3306:将容器的3306端口映射到主机的3307端口
- -v /mydata/mysql/master/conf:/etc/mysql:将配置文件夹挂在到主机
- -v /mydata/mysql/master/log:/var/log/mysql:将日志文件夹挂载到主机
- -v /mydata/mysql/master/data:/var/lib/mysql/:将配置文件夹挂载到主机
- -e MYSQL_ROOT_PASSWORD=root:初始化root用户的密码
修改master基本配置
vim /mydata/mysql/master/conf/my.cnf
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8
[mysqld]
init_connect='SET collation_connection = utf8_unicode_ci'
init_connect='SET NAMES utf8'
character-set-server=utf8
collation-server=utf8_unicode_ci
skip-character-set-client-handshake
skip-name-resolve
注意:skip-name-resolve一定要加,不然连接mysql会超级慢
3、创建Slave实例并启动
docker run -p 3316:3306 --name mysql-slaver-01 \
-v /mydata/mysql/slaver/log:/var/log/mysql \
-v /mydata/mysql/slaver/data:/var/lib/mysql \
-v /mydata/mysql/slaver/conf:/etc/mysql \
-e MYSQL_ROOT_PASSWORD=root \
-d mysql:5.7
修改slave基本配置
vim /mydata/mysql/slaver/conf/my.cnf
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8
[mysqld]
init_connect='SET collation_connection = utf8_unicode_ci'
init_connect='SET NAMES utf8'
character-set-server=utf8
collation-server=utf8_unicode_ci
skip-character-set-client-handshake
skip-name-resolve
4、添加master主从复制部分配置
vim /mydata/mysql/master/conf/my.cnf
server_id=1
log-bin=mysql-bin
read-only=0
binlog-do-db=gmall_ums
binlog-do-db=gmall_pms
binlog-do-db=gmall_oms
binlog-do-db=gmall_sms
binlog-do-db=gmall_cms
replicate-ignore-db=mysql
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema
重启容器
5、添加Slave主从复制部分配置
server_id=2
log-bin=mysql-bin
read-only=1
binlog-do-db=gmall_ums
binlog-do-db=gmall_pms
binlog-do-db=gmall_oms
binlog-do-db=gmall_sms
binlog-do-db=gmall_cms
replicate-ignore-db=mysql
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema
重启容器
6、为master授权用户来他的同步数据
1、进入主库
docker exec -it 4fdd7f265228 /bin/bash
2、进入主库mysql数据库
mysql -u root -p
- 1)、授权root可以远程访问( 主从无关,为了方便我们远程连接mysql)
grant all privileges on *.* to 'root'@'%' identified by 'root' with grant option;
flush privileges;
- 2)、添加用来同步的用户
GRANT REPLICATION SLAVE ON *.* to 'backup'@'%' identified by '123456';
- 3)、查看数据库的状态
show master status\G;
3、进入从库mysql数据库
- 1)、授权root可以远程访问( 主从无关,为了方便我们远程连接mysql)
grant all privileges on *.* to 'root'@'%' identified by 'root' with grant option;
flush privileges;
- 2)、设置主库连接
change master to master_host='192.168.116.129',master_user='backup',master_password='123456',master_log_file='mysql-bin.000001',master_log_pos=0,master_port=3307;
- 3)、启动从库同步
start slave;
- 4)、查看从库状态
show slave status\G;
至此主从配置完成;
总结:
1)、主从数据库在自己配置文件中声明需要同步哪个数据库,忽略哪个数据库等信息。并且server-id不能一样
2)、主库授权某个账号密码来同步自己的数据
3)、从库使用这个账号密码连接主库来同步数据
演示效果
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