1. 首先拉去镜像
docker pull mysql:5.7
2. 运行镜像
主要将日志 存储文件， 配置文件 映射到主机上
docker run -p 13307:3306 --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=123456 \-d mysql:5.7
[root@basenode ~]# docker run -p 13307:3306 --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=123456 \-d mysql:5.7
76176e5ae29317ea207080be62aeffadaada4c82c03753d2c500916449d6476e
[root@basenode ~]#
3. 主节点创建配置文件并且添加内容如下
1. 目录：
/mydata/mysql-master/cnf
[root@basenode conf]# vi my.cnf
[mysqld]
## 设置server_id，同一局域网中需要唯一
server_id=101
## 指定不需要同步的数据库名称
binlog-ignore-db=mysql
## 开启二进制日志功能
log-bin=mall-mysql-bin
## 设置二进制日志使用内存大小（事务）
binlog_cache_size=1M
## 设置使用的二进制日志格式（mixed,statement,row）
binlog_format=mixed
## 二进制日志过期清理时间。默认值为0，表示不自动清理。
expire_logs_days=7
## 跳过主从复制中遇到的所有错误或指定类型的错误，避免slave端复制中断。
## 如：1062错误是指一些主键重复，1032错误是因为主从数据库数据不一致
slave_skip_errors=1062
4. 添加完配置后重启mysql
[root@basenode conf]# docker restart mysql-master
mysql-master
[root@basenode conf]#
5. 进入到mysql 容器内部
# 进入到容器
docker exec -it mysql-master /bin/bash
# 登录mysql
mysql -uroot -p123456
6. 创建同步用户
6.1 创建用户命令：
mysql> CREATE USER 'slave'@'%' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.01 sec)
mysql> GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'slave'@'%';
Query OK, 0 rows affected (0.00 sec)
mysql>
7. 创建从服务器
[root@basenode ~]# docker run -p 13308:3306 --name mysql-slave \
> -v /mydata/mysql-slave/log:/var/log/mysql \
> -v /mydata/mysql-slave/data:/var/lib/mysql \
> -v /mydata/mysql-slave/conf:/etc/mysql \
> -e MYSQL_ROOT_PASSWORD=123456 \
> -d mysql:5.7
230880d2ab8c53351656ceb3998e28595dcd5af28879de3755cf6c6993b0879d
[root@basenode ~]#
8. 从节点创建配置文件并且添加内容如下
[root@basenode ~]# cd /mydata/mysql-slave/cnf
[root@basenode conf]# vi my.cnf
[mysqld]
## 设置server_id，同一局域网中需要唯一
server_id=102
## 指定不需要同步的数据库名称
binlog-ignore-db=mysql
## 开启二进制日志功能，以备Slave作为其它数据库实例的Master时使用
log-bin=mall-mysql-slave1-bin
## 设置二进制日志使用内存大小（事务）
binlog_cache_size=1M
## 设置使用的二进制日志格式（mixed,statement,row）
binlog_format=mixed
## 二进制日志过期清理时间。默认值为0，表示不自动清理。
expire_logs_days=7
## 跳过主从复制中遇到的所有错误或指定类型的错误，避免slave端复制中断。
## 如：1062错误是指一些主键重复，1032错误是因为主从数据库数据不一致
slave_skip_errors=1062
## relay_log配置中继日志
relay_log=mall-mysql-relay-bin
## log_slave_updates表示slave将复制事件写进自己的二进制日志
log_slave_updates=1
## slave设置为只读（具有super权限的用户除外）
read_only=1
9. 重启从节点
[root@basenode conf]# docker restart mysql-slave
mysql-slave
[root@basenode conf]#
10.在主数据库中查看主从同步状态
mysql> show master status;
+-----------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-----------------------+----------+--------------+------------------+-------------------+
| mall-mysql-bin.000001 | 154 | | mysql | |
+-----------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql>
11. 进入从数据库
[root@basenode conf]# docker exec -it mysql-slave /bin/bash
root@230880d2ab8c:/# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.36-log MySQL Community Server (GPL)
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
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 |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
mysql>
12. 在从节点上执行同步命令
change master to master_host='宿主机ip', master_user='slave', master_password='123456', master_port=3307, master_log_file='mall-mysql-bin.000001', master_log_pos=617, master_connect_retry=30;
mysql> change master to master_host='192.168.1.180', master_user='slave', master_password='123456', master_port=13307, master_log_file='mall-mysql-bin.000001', master_log_pos=154, master_connect_retry=30;
Query OK, 0 rows affected, 2 warnings (0.00 sec)
mysql>
13. 在从节点上开启主从同步
mysql> start slave;
14 查看 从节点的状态
mysql> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.180
Master_User: slave
Master_Port: 13307
Connect_Retry: 30
Master_Log_File: mall-mysql-bin.000001
Read_Master_Log_Pos: 154
Relay_Log_File: mall-mysql-relay-bin.000002
Relay_Log_Pos: 325
Relay_Master_Log_File: mall-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: 154
Relay_Log_Space: 537
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: 9eedd539-7601-11ec-93ac-0242ac110005
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
mysql>
主要出现 两个都位yes 就表示成功
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
15 测试成功
docker-mysql 主从.png
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