docker下的mysql主从同步

mysql- @ imooto- 3年前

docker下的mysql主从同步

先介绍一下我搭建使用的环境：centos7
坑1：mysqld: Can't read dir of '/etc/mysql/conf.d/'，这是因为Centos7安全Selinux禁止了一些安全权限，导致mysql和mariadb在进行挂载/var/lib/mysql的时候会提示如下信息

logs命令查看，发现提示信息是：chown: changing ownership of ‘/var/lib/mysql/....‘: Permission denied

于是，解决方法有这么两个：

  1. 在docker run中加入 --privileged=true  给容器加上特定权限
  2. 关闭selinux
    本人采用的是第一种方式
    坑2：CHANGE MASTER TO MASTER_HOST='192.168.150.129',MASTER_PORT=3306,MASTER_USER='repl',MASTER_PASSWORD='repl',MASTER_LOG_FILE='binlog.000002',MASTER_LOG_POS=761;  我在linux上配置了主机名与ip的映射，因此我再master_host填写的是我的主机名，但是一直连不上，后来改为ip地址即可

主从配置文件

master配置文件/home/mysql/etc/master/master.cnf

  1. [mysqld]
  2. server_id = 1
  3.  
  4. character-set-server=utf8mb4
  5. collation-server=utf8mb4_unicode_ci
  6. default-storage-engine=INNODB
  7.  
  8. #Optimize omit
  9.  
  10. sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
  11.  
  12. log-bin     = /var/lib/mysql/binlog
  13. log_bin_trust_function_creators=1
  14. binlog_format = ROW
  15. expire_logs_days = 99
  16. sync_binlog = 0
  17.  
  18. slow-query-log=1
  19. slow-query-log-file=/var/log/mysql/slow-queries.log
  20. long_query_time = 3
  21. log-queries-not-using-indexes

slave配置文件/home/mysql/etc/slave/slave.cnf

  1. [mysqld]
  2. server_id = 2
  3.  
  4. character-set-server=utf8mb4
  5. collation-server=utf8mb4_unicode_ci
  6. default-storage-engine=INNODB
  7.  
  8. #Optimize omit
  9.  
  10. sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
  11.  
  12. log-bin     = /var/lib/mysql/binlog
  13. log_bin_trust_function_creators=1
  14. binlog_format = ROW
  15. expire_logs_days = 99
  16. sync_binlog = 0
  17.  
  18. relay_log=slave-relay-bin
  19. log-slave-updates=1
  20. slave-skip-errors=all
  21.  
  22. slow-query-log=1
  23. slow-query-log-file=/var/log/mysql/slow-queries.log
  24. long_query_time = 3

log-queries-not-using-indexes

启动容器,配置主从复制

创建数据目录：

  1. mkdir -p /home/mysql/data/master
  2. mkdir -p /home/mysql/data/slave
  3.  
  4. MASTER_DIR=/home/mysql/data/master
  5. SLAVE_DIR=/home/mysql/data/slave

启动MySQL容器：

  1. docker run --name mysql-master \
  2. -v /home/mysql/etc/master:/etc/mysql/conf.d \
  3. -v /home/mysql/data/master:/var/lib/mysql \
  4. -e MYSQL_ROOT_PASSWORD=root \
  5. -d \
  6. mysql:5.7
  7.  
  8.  
  9. docker run --name mysql-slave \
  10. -v /home/mysql/etc/slave:/etc/mysql/conf.d \
  11. -v /home/mysql/data/slave:/var/lib/mysql \
  12. -e MYSQL_ROOT_PASSWORD=root \
  13. --link mysql-master:master \
  14. -d mysql:5.7

Master上创建复制用户：

  1. docker exec -it mysql-master mysql -p
  2.  
  3. CREATE USER 'repl'@'%' IDENTIFIED BY 'repl';
  4. GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%';

查看Master节点 Binlog状态：

  1. show master status\G
  2. *************************** 1. row ***************************
  3.              File: binlog.000008
  4.          Position: 595
  5.      Binlog_Do_DB:
  6.  Binlog_Ignore_DB:
  7. Executed_Gtid_Set:
  8. 1 row in set (0.00 sec)

在Slave节点上配置复制：

  1. docker exec -it mysql-slave mysql -p
  2.  
  3. CHANGE MASTER TO \
  4. MASTER_HOST='master',\
  5. MASTER_PORT=3306,\
  6. MASTER_USER='repl',\
  7. MASTER_PASSWORD='repl',\
  8. MASTER_LOG_FILE='binlog.000008',\
  9. MASTER_LOG_POS=595;
  10.  
  11. start slave;
  12.

查看Salve状态：

  1. show slave status\G
  2. *************************** 1. row ***************************
  3.                Slave_IO_State: Waiting for master to send event
  4.                   Master_Host: master
  5.                   Master_User: repl
  6.                   Master_Port: 3306
  7.                 Connect_Retry: 60
  8.               Master_Log_File: binlog.000008
  9.           Read_Master_Log_Pos: 595
  10.                Relay_Log_File: slave-relay-bin.000002
  11.                 Relay_Log_Pos: 317
  12.         Relay_Master_Log_File: binlog.000008
  13.              Slave_IO_Running: Yes
  14.             Slave_SQL_Running: Yes
  15.               Replicate_Do_DB:
  16.           Replicate_Ignore_DB:
  17.            Replicate_Do_Table:
  18.        Replicate_Ignore_Table:
  19.       Replicate_Wild_Do_Table:
  20.   Replicate_Wild_Ignore_Table:
  21.                    Last_Errno: 0
  22.                    Last_Error:
  23.                  Skip_Counter: 0
  24.           Exec_Master_Log_Pos: 595
  25.               Relay_Log_Space: 524
  26.               Until_Condition: None
  27.                Until_Log_File:
  28.                 Until_Log_Pos: 0
  29.            Master_SSL_Allowed: No
  30.            Master_SSL_CA_File:
  31.            Master_SSL_CA_Path:
  32.               Master_SSL_Cert:
  33.             Master_SSL_Cipher:
  34.                Master_SSL_Key:
  35.         Seconds_Behind_Master: 0
  36. Master_SSL_Verify_Server_Cert: No
  37.                 Last_IO_Errno: 0
  38.                 Last_IO_Error:
  39.                Last_SQL_Errno: 0
  40.                Last_SQL_Error:
  41.   Replicate_Ignore_Server_Ids:
  42.              Master_Server_Id: 1
  43.                   Master_UUID: 7a5a452f-fca9-11e6-be18-0242ac110002
  44.              Master_Info_File: /var/lib/mysql/master.info
  45.                     SQL_Delay: 0
  46.           SQL_Remaining_Delay: NULL
  47.       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
  48.            Master_Retry_Count: 86400
  49.                   Master_Bind:
  50.       Last_IO_Error_Timestamp:
  51.      Last_SQL_Error_Timestamp:
  52.                Master_SSL_Crl:
  53.            Master_SSL_Crlpath:
  54.            Retrieved_Gtid_Set:
  55.             Executed_Gtid_Set:
  56.                 Auto_Position: 0
  57.          Replicate_Rewrite_DB:
  58.                  Channel_Name:
  59.            Master_TLS_Version:
  60. 1 row in set (0.00 sec)

  laravel , 闲得慌 , laravel , 闲得慌 ,

作者  :  imooto

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