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Docker启动Mysql
一、单机版 Mysql
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1、拉取官方镜像，镜像地址：/mysql/”>https://hub.docker.com//mysql/
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2、拉取镜像：docker pull mysql
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3、准备Mysql数据存放目录，我这里是：/home/ljaer/mysql
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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:latest
ae6314a69997ba2d6036aced07506a47c9d730592fc3fd741d125f104bae6c3c -
5、检查结果
docker@default:~$ cd /home/ljaer/mysql/
docker@default:/home/ljaer/mysql$ ls
auto.cnf client-cert.pem ib_logfile0 ibtmp1 private_key.pem server-key.pem
ca-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 mysql
mysql -
7、进入容器
Docker ps
查到容器id
docker exec -it id /bin/bash
进入MySQL
mysql
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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
mysql主从同步中show master status，结果为空
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/data
created directory: '/home/docker/mysql/'
created directory: '/home/docker/mysql/data'
docker@default:~$ sudo mkdir -pv /home/docker/mysql/101
created directory: '/home/docker/mysql/101'
docker@default:~$ sudo mkdir -pv /home/docker/mysql/102
created 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-bin
server-id=101
docker@default:~$ sudo vi /home/docker/mysql/102/102.cnf
[mysqld]
log-bin=mysql-bin
server-id=102
4、创建主从服务器容器
docker@default:~$docker create --name mysqlsrv101 -v /home/docker/mysql/data/mysql101:/var/lib/mysql -v /home/docker/mysql/101:/etc/mysql/conf.d -e MYSQL_ROOT_PASSWORD=123456 -p 3306:3306 mysql:5.7
docker@default:~$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 mysqlsrv101
mysqlsrv101
docker@default:~$ docker start mysqlsrv102
mysqlsrv102
docker@default:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
54a2a729c11b mysql:5.7 "docker-entrypoint..." 24 seconds ago Up 1 second 0.0.0.0:3316->3306/tcp mysqlsrv102
45dfb1ba4f6b 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/bash
root@45dfb1ba4f6b:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 3
Server 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 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 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: 0
Master_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
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