Docker启动Mysql

Docker启动Mysql

一、单机版 Mysql

• 1、拉取官方镜像，镜像地址：/mysql/”>https://hub.docker.com//mysql/

• 2、拉取镜像：docker pull mysql

• 3、准备Mysql数据存放目录，我这里是：/home/ljaer/mysql

• 4、执行指令启动Mysql

docker@default:~$ docker run --name mysql -v /home/ljaer/mysql:/var/lib/mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 -d mysql:latestae6314a69997ba2d6036aced07506a47c9d730592fc3fd741d125f104bae6c3c

• 5、检查结果

docker@default:~$ cd /home/ljaer/mysql/docker@default:/home/ljaer/mysql$ lsauto.cnf            client-cert.pem     ib_logfile0         ibtmp1              private_key.pem     server-key.pemca-key.pem          client-key.pem      ib_logfile1         mysql/              public_key.pem      sys/ca.pem              ib_buffer_pool      ibdata1             performance_schema/ server-cert.pem

• 6、执行指令关闭Mysql

docker@default:~$ docker stop mysqlmysql

• 7、进入容器

  Docker ps

查到容器id

docker exec -it id /bin/bash

进入MySQL

mysql

• 8、查看配置文件

  /etc/mysql/mysql.conf.d/mysqld.cnf

二、 docker 运行 mysql 主从备份，读写分离

参考链接

docker运行mysql主从备份，读写分离

mysql主从同步中show master status，结果为空

docker mysql 主从配置

1、拉取镜像

docker pull mysql/mysql-server 

当前使用的是最新版：5.7

2、设置目录

为了使MySql的数据保持在宿主机上，先建立几个目录

docker@default:~$ sudo mkdir -pv /home/docker/mysql/datacreated directory: '/home/docker/mysql/'created directory: '/home/docker/mysql/data'docker@default:~$ sudo mkdir -pv /home/docker/mysql/101created directory: '/home/docker/mysql/101'docker@default:~$ sudo mkdir -pv /home/docker/mysql/102created directory: '/home/docker/mysql/102'

3、设置主从服务器配置

docker@default:~$ sudo vi /home/docker/mysql/101/101.cnf[mysqld]log-bin=mysql-binserver-id=101docker@default:~$ sudo vi /home/docker/mysql/102/102.cnf[mysqld]log-bin=mysql-binserver-id=102

4、创建主从服务器容器

docker@default:~$docker create --name mysqlsrv101 -v /home/docker/mysql/data/mysql101:/var/lib/mysql -v /home/docker/mysql/101:/etc/mysql/conf.d -e MYSQL_ROOT_PASSWORD=123456 -p 3306:3306 mysql:5.7docker@default:~$docker create --name mysqlsrv102 -v /home/docker/mysql/data/mysql102:/var/lib/mysql -v /home/docker/mysql/102:/etc/mysql/conf.d -e MYSQL_ROOT_PASSWORD=123456 -p 3316:3306 mysql:5.7

5、启动容器

docker@default:~$ docker start mysqlsrv101mysqlsrv101docker@default:~$ docker start mysqlsrv102mysqlsrv102docker@default:~$ docker psCONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES54a2a729c11b        mysql:5.7           "docker-entrypoint..."   24 seconds ago      Up 1 second         0.0.0.0:3316->3306/tcp   mysqlsrv10245dfb1ba4f6b        mysql:5.7           "docker-entrypoint..."   32 seconds ago      Up 7 seconds        0.0.0.0:3306->3306/tcp   mysqlsrv101

6、登录主服务器的mysql，查询master的状态

docker@default:~$ docker exec -it 45dfb /bin/bashroot@45dfb1ba4f6b:/# mysql -uroot -p Enter password: Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 3Server version: 5.7.19-log MySQL Community Server (GPL)Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> show master status;+------------------+----------+--------------+------------------+-------------------+| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |+------------------+----------+--------------+------------------+-------------------+| mysql-bin.000003 |      154 |              |                  |                   |+------------------+----------+--------------+------------------+-------------------+1 row in set (0.00 sec)mysql> 

7、主库创建用户

mysql> SET sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));Query OK, 0 rows affected (0.00 sec)mysql> GRANT REPLICATION SLAVE ON *.* to 'backup'@'%' identified by '123456';Query OK, 0 rows affected, 1 warning (0.00 sec)

8、登录从服务器的mysql，设置与主服务器相关的配置参数

SET sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));change master to master_host='192.168.99.100',master_user='backup',master_password='123456',master_log_file='mysql-bin.000003',master_log_pos=154;

• master_host为docker的地址不能写127.0.0.1
• master_user是在主库创建的用户
• master_log_pos是主库show master status;查询出的Position

启动服务

mysql> start slave;Query OK, 0 rows affected (0.00 sec)

查看服务状态

mysql> show slave status \G;*************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.99.100                  Master_User: backup                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: mysql-bin.000003          Read_Master_Log_Pos: 724               Relay_Log_File: 54a2a729c11b-relay-bin.000002                Relay_Log_Pos: 890        Relay_Master_Log_File: mysql-bin.000003             Slave_IO_Running: Yes            Slave_SQL_Running: Yes              Replicate_Do_DB:           Replicate_Ignore_DB:            Replicate_Do_Table:        Replicate_Ignore_Table:       Replicate_Wild_Do_Table:   Replicate_Wild_Ignore_Table:                    Last_Errno: 0                   Last_Error:                  Skip_Counter: 0          Exec_Master_Log_Pos: 724              Relay_Log_Space: 1104              Until_Condition: None               Until_Log_File:                 Until_Log_Pos: 0           Master_SSL_Allowed: No           Master_SSL_CA_File:            Master_SSL_CA_Path:               Master_SSL_Cert:             Master_SSL_Cipher:                Master_SSL_Key:         Seconds_Behind_Master: 0Master_SSL_Verify_Server_Cert: No                Last_IO_Errno: 0                Last_IO_Error:                Last_SQL_Errno: 0               Last_SQL_Error:   Replicate_Ignore_Server_Ids:              Master_Server_Id: 101                  Master_UUID: 234c1f34-8c63-11e7-8d0c-0242ac110002             Master_Info_File: /var/lib/mysql/master.info                    SQL_Delay: 0          SQL_Remaining_Delay: NULL      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates           Master_Retry_Count: 86400                  Master_Bind:       Last_IO_Error_Timestamp:      Last_SQL_Error_Timestamp:                Master_SSL_Crl:            Master_SSL_Crlpath:            Retrieved_Gtid_Set:             Executed_Gtid_Set:                 Auto_Position: 0         Replicate_Rewrite_DB:                  Channel_Name:            Master_TLS_Version: 1 row in set (0.00 sec)ERROR: No query specified

Slave_IO_State：

Waiting for master to send event 就是成功了

Connecting to master 多半是连接不通

主要参数

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

之后主库的修改都能同步到从库了