【Docker专题】docker-compose启动mysql双机热备互为主从的方法实现
1. 环境说明
IP地址 | 服务 |
---|---|
10.1..65 | mysql-01 |
10.1..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
services:
db:
image: ‘harbocto..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
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
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
services:
db:
image: ‘harbocto..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
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
4. 配置主从同步
4.1 mysql-01(master) ==> mysql-02(slave)
登录10.1..66操作
1)确定slave设置
进入mysql-02容器
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ead2301cd20d harbocto..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。
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:
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。
设置slave
master_port = 3306,
master_user = ‘root’,
master_password = ‘yqKlmgs1cl’,
master_log_file = ‘mysql-bin.000002’,
master_log_pos = 154;
启动slave
Query OK, 0 rows affected (0.00 sec)
查看主从状态
*************************** 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..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。