docker-compose启动mysql双机热备互为主从的方法实现
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1. 环境说明
| IP地址 | 服务 |
|---|---|
| 10.1.xxx.65 | mysql-01 |
| 10.1.xxx.66 | mysql-02 |
2. 启动 mysql-01
创建master-01 目录，目录下边创建 docker-compose.yml和my.cnf两个文件如下：
docker-compose.yml
version: '3'
services:
db:
image: 'harbocto.xxx.com.cn/public/mysql:5.7'
restart: always
container_name: mysql
volumes:
- ./data:/var/lib/mysql
- ./my.cnf:/etc/mysql/my.cnf
- ./init:/docker-entrypoint-initdb.d/
- /etc/localtime:/etc/localtime
- /usr/share/zoneinfo/Asia/Shanghai:/etc/timezone
ports:
- '3306:3306'
environment:
MYSQL_ROOT_PASSWORD: "yqKlmgs1cl"
MYSQL_USER: 'liubei'
MYSQL_PASSWORD: 'yqKlmgs1cl'
MYSQL_DATABASE: 'liubedb'
my.cnf
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
secure-file-priv= NULL
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Custom config should go here
!includedir /etc/mysql/conf.d/
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
server-id=150
log-bin=/var/lib/mysql/mysql-bin
expire_logs_days=7
binlog-format=mixed
max_allowed_packet=256M
relay-log=mysql-relay
log-slave-updates启动
docker-compose up -d
3. 启动 mysql-02
创建master-02 目录，下边创建 docker-compose.yml和my.cnf两个文件如下：
docker-compose.yml
version: '3'
services:
db:
image: 'harbocto.xxx.com.cn/public/mysql:5.7'
restart: always
container_name: mysql
volumes:
- ./data:/var/lib/mysql
- ./my.cnf:/etc/mysql/my.cnf
- ./init:/docker-entrypoint-initdb.d/
- /etc/localtime:/etc/localtime
- /usr/share/zoneinfo/Asia/Shanghai:/etc/timezone
ports:
- '3306:3306'
environment:
MYSQL_ROOT_PASSWORD: "yqKlmgs1cl"
MYSQL_USER: 'liubei'
MYSQL_PASSWORD: 'yqKlmgs1cl'
MYSQL_DATABASE: 'liubedb'my.cnf
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
secure-file-priv= NULL
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Custom config should go here
!includedir /etc/mysql/conf.d/
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
server-id=200
log-bin=/var/lib/mysql/mysql-bin
expire_logs_days=7
binlog-format=mixed
max_allowed_packet=256M
relay-log=mysql-relay
log-slave-updates启动
docker-compose up -d
4. 配置主从同步
4.1 mysql-01（master） ==> mysql-02（slave）
登录10.1.xxx.66操作
1）确定slave设置
进入mysql-02容器
[root@db-02 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ead2301cd20d harbocto.xxx.com.cn/public/mysql:5.7 "docker-entrypoint.s…" 58 minutes ago Up 58 minutes 0.0.0.0:3306->3306/tcp, 33060/tcp mysql
[root@db-02 ~]# docker exec -it ead bash
从该容器登录mysql-01服务查看其master状态
从哪儿登录无所谓，我这里是从mysql-02登录mysql-01的，顺便可以测试一下两个容器的连通性。
root@ead2301cd20d:/# mysql -h10.1.xxx.65 -uroot -pyqKlmgs1cl
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000002 | 154 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql> exit
根据mysql-01 的master 状态拼接mysql-02 设置 slave的命令：
CHANGE MASTER TO master_host = '10.1.xx.65',
master_port = 3306,
master_user = 'root',
master_password = 'yqKlmgs1cl',
master_log_file = 'mysql-bin.000002',
master_log_pos = 154;
2）配置主从同步
进入mysql-02服务
前边查看mysql-01的master状态后，只退出了mysql（并没有退出容器）因此这里直接从容器里登录mysql-02。
root@ead2301cd20d:/# mysql -uroot -pyqKlmgs1cl
设置slave
mysql> CHANGE MASTER TO master_host = '10.1.xx.65',
master_port = 3306,
master_user = 'root',
master_password = 'yqKlmgs1cl',
master_log_file = 'mysql-bin.000002',
master_log_pos = 154;
启动slave
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
查看主从状态
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.1.30.65
Master_User: root
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 154
Relay_Log_File: mysql-relay.000003
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000002
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: 523
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: 150
Master_UUID: af701e96-0279-11ed-a999-0242ac130002
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)4.2 mysql-02（master） ==> mysql-01（slave）
登录10.1.xxx.65操作
1）确定slave设置
同上，只是master点换成了mysql-02。
根据mysql-02的master状态确定 mysql-01的slave设置命令。
2）配置主从同步
同上，只不过这次是在mysql-01服务上执行命令。
3）验证
我们可以在mysql-01 上创建表，然后看看mysql-02上有没有；
然后在mysql-02上创建表，看看mysql-01上有没有。
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