docker mysql主从复制

本篇基于https://www.cnblogs.com/sweetchildomine/p/7814692.html，进行整合。修改内容包括 以下几点：
1. 实现不同：个人转换为在docker内运行2个mysql容器，对容 器进行单独ip设置,而原文中是两个ip不同的机器或者虚拟机
2. 原文中调用镜像，命令使用了一些镜像id，容器id，对此改用 镜像名称、容器别名 的形式，便于使用。
3.容器设置ip,参考与 http://blog.youkuaiyun.com/tzm1921995/article/details/52526661

一、准备工作

1. docker pull mysql:5.7.21  //拉取mysql5.7.21版本的镜像
2. 使用network plugin创建一个新的bridge，然后即可通过–ip 选项自定ip，实现docker 容器固定ip 
   # 1.设置新的bridge,别名br1，ip段根据个人喜好设置即可    
   docker network  create  -d bridge --subnet=192.168.210.0/24 --gateway=192.168.210.1 -o parent=eth0 br1
   # 2. 查看
    docker network ls

二、Master 部分

1. 宿主机持久化mysql data 以及mysql.cnf

 mkdir -pv /usr/local/mysqlData/master/cnf
 mkdir -pv /usr/local/mysqlData/master/data
 # 1. 创建mysql.cnf
   cd /usr/local/mysqlData/master/cnf
   touch mysql.cnf 
 # 2. 编辑mysql.cnf 
    vi /usr/loal/mysqlData/master/cnf/mysql.cnf

 # 3. master mysql.cnf的内容,复制

---

    [mysqld]
    pid-file = /var/run/mysqld/mysqld.pid
    socket = /var/run/mysqld/mysqld.sock
    datadir = /var/lib/mysql

    symbolic-links=0

    character-set-server = utf8   
    #skip-networking  
    innodb_print_all_deadlocks = 1
    max_connections = 2000  
    max_connect_errors = 6000  
    open_files_limit = 65535  
    table_open_cache = 128   
    max_allowed_packet = 4M  
    binlog_cache_size = 1M  
    max_heap_table_size = 8M  
    tmp_table_size = 16M  

    read_buffer_size = 2M  
    read_rnd_buffer_size = 8M  
    sort_buffer_size = 8M  
    join_buffer_size = 28M  
    key_buffer_size = 4M  

    thread_cache_size = 8  

    query_cache_type = 1  
    query_cache_size = 8M  
    query_cache_limit = 2M  

    ft_min_word_len = 4  

    log-bin = mysql-bin
    server-id = 100  #ip的最后一位，个人设置的masterip为192.168.210.100
    binlog_format = mixed  

    performance_schema = 0  
    explicit_defaults_for_timestamp  

    #lower_case_table_names = 1  

    interactive_timeout = 28800  
    wait_timeout = 28800  

    # Recommended in standard MySQL setup  

    sql_mode=NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER,STRICT_TRANS_TABLES   

    [mysqldump]  
    quick  
    max_allowed_packet = 16M  

    [myisamchk]
    key_buffer_size = 8M
    sort_buffer_size = 8M
    read_buffer = 4M
    write_buffer = 4M

2. 启动容器，命名为master

docker run -itd --net=br1 --ip=192.168.210.100 -p 3306:3306 --name master -v /usr/local/mysqlData/master/cnf:/etc/mysql/conf.d -v /usr/local/mysqlData/master/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=masterpwd mysql

3.进入master容器,开启root 远程访问， 并添加复制master数据的用户

[root@192 ~]# docker exec -it master /bin/bash
root@942c2253509c:/# mysql -uroot -pmasterpwd 

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'masterpwd' WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> GRANT REPLICATION SLAVE ON *.* to 'reader'@'%' identified by 'readerpwd';

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

三、Slave 部分(与Master操作类似)

1. 宿主机持久化mysql data 以及mysql.cnf

mkdir -pv /usr/local/mysqlData/slave/cnf
mkdir -pv /usr/local/mysqlData/slave/data
# 1. 创建mysql.cnf
cd /usr/local/mysqlData/slave/cnf
touch mysql.cnf

# 2. 编辑mysql.cnf 
vi /usr/loal/mysqlData/slave/cnf/mysql.cnf

# 3. slave mysql.cnf的内容,复制即可。注意ip的设置值

---

    [mysqld]
    pid-file    = /var/run/mysqld/mysqld.pid
    socket    = /var/run/mysqld/mysqld.sock
    datadir    = /var/lib/mysql

    symbolic-links=0

    character-set-server = utf8   
    #skip-networking  
    innodb_print_all_deadlocks = 1
    max_connections = 2000  
    max_connect_errors = 6000  
    open_files_limit = 65535  
    table_open_cache = 128   
    max_allowed_packet = 4M  
    binlog_cache_size = 1M  
    max_heap_table_size = 8M  
    tmp_table_size = 16M  

    read_buffer_size = 2M  
    read_rnd_buffer_size = 8M  
    sort_buffer_size = 8M  
    join_buffer_size = 28M  
    key_buffer_size = 4M  

    thread_cache_size = 8  

    query_cache_type = 1  
    query_cache_size = 8M  
    query_cache_limit = 2M  

    ft_min_word_len = 4  

    log-bin = mysql-bin
    server-id = 101 # id的最后一位，个人设置ip:192.168.210.101
    binlog_format = mixed  

    performance_schema = 0  
    explicit_defaults_for_timestamp  

    #lower_case_table_names = 1  

    interactive_timeout = 28800  
    wait_timeout = 28800  

    # Recommended in standard MySQL setup  

    sql_mode=NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER,STRICT_TRANS_TABLES   

    [mysqldump]  
    quick  
    max_allowed_packet = 16M  

    [myisamchk]
    key_buffer_size = 8M
    sort_buffer_size = 8M
    read_buffer = 4M
    write_buffer = 4M

2. 启动容器，命名为slave

docker run -itd --net=br1 --ip=192.168.210.101 -p 3307:3306 --name slave -v /usr/local/mysqlData/slave/cnf:/etc/mysql/conf.d -v /usr/local/mysqlData/slave/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=slavepwd mysql    

3.进入slave容器,开启root 远程访问,并添加slave数据的用户

#进入容器开启root 远程访问
[root@192 ~]# docker exec -it slave /bin/bash
#登陆mysql
root@942c2253509c:/# mysql -uroot -pslavepwd
mysql> grant SHOW DATABASES,SELECT on *.* to 'slave'@'%' identified by 'slavepwd';
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

4. 切换到master容器，进入mysql

[root@192 ~]# docker exec -it master /bin/bash
root@942c2253509c:/# mysql -uroot -pmasterpwd 
# 查询master的信息
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000003 |     1063 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

5. 切换到slave容器，继续进行mysql操作

mysql> change master to master_host='192.168.210.100',master_user='reader',master_password='readerpwd',master_log_file='mysql-bin.000003',master_log_pos=1063;
Query OK, 0 rows affected, 2 warnings (0.00 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: 192.168.210.100
                  Master_User: reader
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000003
          Read_Master_Log_Pos: 1063
               Relay_Log_File: 785b10c19cd6-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: 
           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: 1063
              Relay_Log_Space: 534
              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: 100
                  Master_UUID: 03cd5fba-07e3-11e8-81d3-0242c0a8d264
             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

至此，基础设置完成，下面进行验证
即master 添加一个数据库，查看slave是否进行相同的判断。

# master 创建slavetest_success
mysql> create database slavetest_success;
Query OK, 1 row affected (0.00 sec)

# slave 查看
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| slavetest_success  |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

---

参考博客列表
[1]: https://www.cnblogs.com/sweetchildomine/p/7814692.html 高因咖啡 《docker mysql 主从复制》
[2]: http://blog.youkuaiyun.com/tzm1921995/article/details/52526661 tzm1921995 《docker 容器固定ip》