Docker mysql 主从

一、独立容器部署mysql主从　

# 主从 my.cnf加上

[mysqld]
server-id = XXX
log-bin = mysql-bin
log-bin-index = log-bin.index　

　　（1）master

docker run -d \
--name mysql_master \
-p 3310:3306 \
-v /data/conf/master-slave/master.cnf:/etc/mysql/my.cnf \
-v /data/conf/master-slave/localtime:/etc/localtime  \
-v /data/storage/cluster_data/master_data:/var/lib/mysql \
-e MYSQL_ROOT_PASSWORD=Password4Root \
mysql

　　（2）slave　

docker run -d \
--name mysql_slave \
-p 3311:3306 \
-v /data/conf/master-slave/slave.cnf:/etc/mysql/my.cnf \
-v /data/conf/master-slave/localtime:/etc/localtime \
-v /data/storage/cluster_data/slave_data:/var/lib/mysql \
-e MYSQL_ROOT_PASSWORD=Password4Root \
--link mysql_master:master \
mysql

　　（3）查看　

docker ps
CONTAINER ID        IMAGE                   COMMAND                  CREATED              STATUS              PORTS                            NAMES
dc5f46aa135b        mysql                   "docker-entrypoint.s…"   About a minute ago   Up About a minute   0.0.0.0:3311->3306/tcp           mysql_slave
be3e1af663cd        mysql                   "docker-entrypoint.s…"   About a minute ago   Up About a minute   0.0.0.0:3310->3306/tcp           mysql_master

　　（4）主库Replication设置

# 登入主库
docker exec -it mysql_master mysql -uroot -pPassword4Root

mysql> grant all privileges on *.* to 'repl'@'%' identified by 'repl_password';
Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> show master status\G;
*************************** 1. row ***************************
             File: mysql-bin.000003
         Position: 434
     Binlog_Do_DB:
 Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)

　　（5）从库Replication设置

# 登入从库
docker exec -it mysql_slave mysql -uroot -pPassword4Root

# 设置主从
mysql> change master to
    -> master_host='master',
    -> master_user='repl',
    -> master_password='repl_password',
    -> master_log_file='mysql-bin.000003',
    -> master_log_pos=434;

# 启动slave
mysql> start slave;

# 查看状态
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: master
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 434
               Relay_Log_File: 5925cc301b6b-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB:
          Replicate_Ignore_DB:

　　

　　

　　（6）测试

　　主库新建数据库

　　

　　从库查看

　　

　　尝试重启mysql_master容器，slave状态变为connecting

　　

　　重启完成后，状态恢复正常

　　

二、Docker Swarm mysql主从

　　（1）创建secret文件

# echo "Password4Root" | docker secret create root_cluster_password -
w4wv4askqam5znua5032gm8vt

　　（2）使用swarm配置管理

　　master.cnf和slave.cnf要存在

# 创建主从配置文件
[root@manager master-slave]# docker config create master.cnf master.cnf
t1rjlq7djtulxzl7gppf3rrum
[root@manager master-slave]# docker config create slave.cnf slave.cnf
u229zquvbevbq50k92ylqcgqn

　　（3）创建overlay网络　　

# docker network create -d overlay mysql-cluster --subnet 10.10.2.0/24
zf4n8waxc283uprq8eppx2gzp

　　（4）创建服务　

# master
[root@manager ~]# docker service create \
> --name mysql_master \
> --replicas 1 \
> --network mysql-cluster \
> --secret root_cluster_password \
> --config src=master.cnf,target=/etc/mysql/my.cnf \
> -e MYSQL_ROOT_PASSWORD_FILE=/run/secrets/root_cluster_password \
> --mount type=volume,src=master_data,dst=/var/lib/mysql \
> --publish 3320:3306 \
> mysql
nuthmf6fdpmjmew1pzhdninmg
overall progress: 1 out of 1 tasks
1/1: running   [==================================================>]
verify: Service converged

# slave
[root@manager ~]# docker service create \
> --name mysql_slave \
> --replicas 1 \
> --network mysql-cluster \
> --secret root_cluster_password \
> --config src=slave.cnf,target=/etc/mysql/my.cnf \
> --mount type=volume,src=slave_data,dst=/var/lib/mysql \
> -e MYSQL_ROOT_PASSWORD_FILE=/run/secrets/root_cluster_password \
> --publish 3321:3306 \
> mysql
pyed0j0jlijy1upbyicuayvko
overall progress: 1 out of 1 tasks
1/1: running   [==================================================>]
verify: Service converged

　　

[root@manager ~]# docker service ls
ID                  NAME                MODE                REPLICAS            IMAGE               PORTS
nuthmf6fdpmj        mysql_master        replicated          1/1                 mysql:latest        *:3320->3306/tcp
pyed0j0jlijy        mysql_slave         replicated          1/1                 mysql:latest        *:3321->3306/tcp　

　　（5）主从配置

# 登入master所在节点的主库

mysql> grant all privileges on *.* to 'repl'@'%' identified by 'repl_password';
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> show master status\G;
*************************** 1. row ***************************
             File: mysql-bin.000003
         Position: 434
     Binlog_Do_DB:
 Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)

# 登入slave所在节点从库
mysql> change master to
    -> master_host='mysql_master',
    -> master_user='repl',
    -> master_password='repl_password',
    -> master_log_file='mysql-bin.000003',
    -> master_log_pos=434;
Query OK, 0 rows affected, 2 warnings (0.29 sec)

mysql> start slave;
Query OK, 0 rows affected (0.01 sec

　　查看状态

　　

　　（6）测试验证

　　主库创建数据库

　　

　　查看从库

　　

　　stop 主库（在swarm集群中，关停的容器默认会自动重启）

　　

　　重启完成后恢复正常

　　

三、服务编排部署mysql主从

　　（1）mysql_replications.yml　　

version: "3.3"
services:
  master:
    image: mysql:latest
    networks:
      - rep_net
    ports:
      - "3330:3306"
    volumes:
      - type: volume
        source: master-data
        target: /var/lib/mysql
        volume:
          nocopy: true
    configs:
      - source: localtime
        target: /etc/localtime
      - source: master.cnf
        target: /etc/mysql/my.cnf
    deploy:
      replicas: 1
      restart_policy:
        condition: on-failure
      resources:
        limits:
          cpus: '0.8'
          memory: 500M
        reservations:
          cpus: '0.25'
          memory: 200M
    secrets:
      - root_password
    environment:
      - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/root_password

  slave:
    image: mysql:latest
    networks:
      - rep_net
    ports:
      - "3331:3306"
    volumes:
      - type: volume
        source: slave-data
        target: /var/lib/mysql
        volume:
          nocopy: true
    configs:
      - source: localtime
        target: /etc/localtime
      - source: slave.cnf
        target: /etc/mysql/my.cnf
    deploy:
      replicas: 1
      restart_policy:
        condition: on-failure
      resources:
        limits:
          cpus: '0.8'
          memory: 500M
        reservations:
          cpus: '0.25'
          memory: 200M
    secrets:
      - root_password
    environment:
      - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/root_password

secrets:
  root_password:
    external: true

configs:
  localtime:
    external: true
  master.cnf:
    external: true
  slave.cnf:
    external: true

volumes:
  master-data:
  slave-data:
networks:
  rep_net:
    driver: overlay

　　（2）部署服务

# docker stack deploy -c mysql_replications.yml repl
Creating network repl_rep_net
Creating service repl_master
Creating service repl_slave

　　（3）查看服务

[root@manager stack_compose]# docker service ls
ID                  NAME                MODE                REPLICAS            IMAGE
khfpkq81op7b        repl_master         replicated          1/1                 mysql:latest        *:3330->3306/tcp
u7k4enpy1eru        repl_slave          replicated          1/1                 mysql:latest        *:3331->3306/tcp

　　（4）配置主从

# master

# docker exec -it fb85153f27ac mysql -uroot -pPassword4Root

mysql> grant all privileges on *.* to 'repl'@'%' identified by 'repl_password';
Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> show master status\G;
*************************** 1. row ***************************
             File: mysql-bin.000003
         Position: 434
     Binlog_Do_DB:
 Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)

# slave

mysql> change master to
    -> master_host='master',
    -> master_user='repl',
    -> master_password='repl_password',
    -> master_log_file='mysql-bin.000003',
    -> master_log_pos=434;
Query OK, 0 rows affected, 2 warnings (0.01 sec)

mysql> start slave;
Query OK, 0 rows affected (0.00 sec

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: master
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 434
               Relay_Log_File: 0ddecac560e1-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
            .....
            .....

　　主从正常