docker-compose啟動mysql雙機熱備互為主從的方法實現
1. 環境說明
| IP地址 | 服務 |
|---|---|
| 10.1.xxx.65 | mysql-01 |
| 10.1.xxx.66 | mysql-02 |
2. 啟動 mysql-01
創建master-01 目錄，目錄下邊創建 docker-compose.yml和my.cnf兩個文件如下：
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
啟動
docker-compose up -d
3. 啟動 mysql-02
創建master-02 目錄，下邊創建 docker-compose.yml和my.cnf兩個文件如下：
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
啟動
docker-compose up -d
4. 配置主從同步
4.1 mysql-01（master） ==> mysql-02（slave）
登錄10.1.xxx.66操作
1）確定slave設置
進入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
從該容器登錄mysql-01服務查看其master狀態
從哪兒登錄無所謂，我這裡是從mysql-02登錄mysql-01的，順便可以測試一下兩個容器的連通性。
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
根據mysql-01 的master 狀態拼接mysql-02 設置 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）配置主從同步
進入mysql-02服務
前邊查看mysql-01的master狀態後，隻退出瞭mysql（並沒有退出容器）因此這裡直接從容器裡登錄mysql-02。
root@ead2301cd20d:/# mysql -uroot -pyqKlmgs1cl
設置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;
啟動slave
mysql> start slave; Query OK, 0 rows affected (0.00 sec)
查看主從狀態
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）
登錄10.1.xxx.65操作
1）確定slave設置
同上，隻是master點換成瞭mysql-02。
根據mysql-02的master狀態確定 mysql-01的slave設置命令。
2）配置主從同步
同上，隻不過這次是在mysql-01服務上執行命令。
3）驗證
我們可以在mysql-01 上創建表，然後看看mysql-02上有沒有；
然後在mysql-02上創建表，看看mysql-01上有沒有。
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