Docker安装mysql
首先拉取docker镜像
docker pull mysql
启动容器
Master(主):
docker run -p 3339:3306 --name mysql-master -e MYSQL_ROOT_PASSWORD=135246 -d mysql
Slave(从):
docker run -p 3340:3306 --name mysql-slave -e MYSQL_ROOT_PASSWORD=135246 -d mysql
Master对外映射的端口是3339,Slave对外映射的端口是3340。因为docker容器是相互独立的,每个容器有其独立的ip,所以不同容器使用相同的端口并不会冲突。这里我们应该尽量使用mysql默认的3306端口,否则可能会出现无法通过ip连接docker容器内mysql的问题。
到Master容器内部
docker exec -it mysql-master /bin/bash
容器内部添加mysql帐号
mysql -uroot -p135246
CREATE USER 'user_w'@'%' IDENTIFIED BY '135246';
GRANT ALL PRIVILEGES ON * .* TO 'user_w'@'%';
容器外连接可能遇到报错
mysql -h127.00.1 -P3339 -u user_w -p135246
ERROR 2059 (HY000): Authentication plugin 'caching_sha2_password' cannot be loaded
容器内部设置解决报错问题
ALTER USER 'user_w'@'%' IDENTIFIED WITH mysql_native_password BY '135246';
修改my.cnf
在master容器内
cd /etc/mysql切换到/etc/mysql目录下,然后vi my.cnf对my.cnf进行编辑。此时会报出bash: vi: command not found,需要我们在docker容器内部自行安装vim。使用apt-get install vim命令安装vim
会出现如下问题:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package vim
执行apt-get update,然后再次执行apt-get install vim即可成功安装vim。然后我们就可以使用vim编辑my.cnf,在my.cnf中添加如下配置:
[mysqld]
## 同一局域网内注意要唯一
server-id=100
## 开启二进制日志功能,可以随便取(关键)
log-bin=mysql-bin
重启docker 容器生效配置
下一步在Master数据库创建数据同步用户,授予用户 slave REPLICATION SLAVE权限和REPLICATION CLIENT权限,用于在主从库之间同步数据。
CREATE USER 'slave'@'%' IDENTIFIED BY '135246';
GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'slave'@'%';
和配置Master(主)一样,在Slave配置文件my.cnf中添加如下配置:
[mysqld]
## 设置server_id,注意要唯一
server-id=101
## 开启二进制日志功能,以备Slave作为其它Slave的Master时使用
log-bin=mysql-slave-bin
## relay_log配置中继日志
relay_log=edu-mysql-relay-bin
同样重启从服务docker容器
获取容器IP地址
在本机命令行执行
docker inspect -f '{{.Name}} - {{.NetworkSettings.IPAddress }}' $(docker ps -aq)
设置主从同步
在Master进入mysql,执行
show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 | 155 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
在Slave进入mysql,设置其主数据库
change master to master_host='172.17.0.2', master_user='slave', master_password='135246', master_port=3306, master_log_file='mysql-bin.000001', master_log_pos= 155, master_connect_retry=30;
增加从数据库连接帐号
mysql -uroot -p135246
CREATE USER 'user_r'@'%' IDENTIFIED BY '135246';
GRANT SElECT ON * .* TO 'user_r'@'%';
ALTER USER 'user_r'@'%' IDENTIFIED WITH mysql_native_password BY '135246';
在Slave 中的mysql终端执行show slave status \G;用于查看主从同步状态。
当
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
都为Yes时,表示正常同步了
show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.17.0.2
Master_User: slave
Master_Port: 3306
Connect_Retry: 30
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 23093
Relay_Log_File: edu-mysql-relay-bin.000002
Relay_Log_Pos: 322
Relay_Master_Log_File: mysql-bin.000001
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: 23093
Relay_Log_Space: 534
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: 100
Master_UUID: 12b2e6dd-bf46-11e9-ba82-0242ac110002
Master_Info_File: mysql.slave_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:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set (0.00 sec)
ERROR:
No query specified
从库停止主从复制
STOP SLAVE IO_THREAD FOR CHANNEL ''
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