docker mysql 主從配置

qiuqiumade發表於2021-01-27
DockerMySql
前言

之前配置過windows的主從，現在來複習一下docker 的主從配置

主從原理

master庫 ——》curd操作——-》記錄到binlog日誌中——-》通過IO執行緒——-》儲存到ready log（中繼日誌）——》sql執行緒—–》寫入到slave庫

配置

  1. master 配置

    # master 配置
server-id=1             # 服務ID，主庫一般設定為1
log-bin=binlog          # 檔案格式
binlog_format=mixed        # 日誌格式，stament,row,mixed

  2. slave 配置

    # slave 配置
server-id=2                # 服務ID
log-bin=binlog
binlog_format=mixed

  3. master 建立擁有許可權的使用者，用來主備處理

    # 建立使用者
CREATE USER 'backup'@'%' IDENTIFIED BY '123456';
# 授予許可權
GRANT ALL PRIVILEGES ON *.* TO 'backup'@'%' WITH GRANT OPTION;
# 更新許可權
flush privileges;

  4. 檢視主庫的日誌狀態

    # master 主庫狀態
show master status
+---------------+----------+--------------+------------------+-------------------+
| File          | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------+----------+--------------+------------------+-------------------+
| binlog.000002 |      156 |              |                  |                   |
+---------------+----------+--------------+------------------+-------------------+

  5. 主備連線

    # docker master主庫 ip地址
change master to master_host='172.17.0.2',
master_user='backup',
master_password='123456',
master_port=3306,
master_log_file='binlog.000002',
master_log_pos=156;

# 開啟slave
start slave

  6. 檢視備庫狀態

    show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.17.0.2
                  Master_User: backup
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: binlog.000012
          Read_Master_Log_Pos: 156
               Relay_Log_File: 5dd396d0bfec-relay-bin.000003
                Relay_Log_Pos: 365
        Relay_Master_Log_File: binlog.000012
             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: 156
              Relay_Log_Space: 746
              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: 1
                  Master_UUID: 3bc79f30-5616-11eb-9070-0242ac110002
             Master_Info_File: mysql.slave_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:
       Master_public_key_path:
        Get_master_public_key: 0
            Network_Namespace:

  # 重要引數
  Slave_IO_Running: Yes
  Slave_SQL_Running: Yes
  # 只有當這2個引數都為yes，才是真正聯通

  7. 測試流程

    # master 建立 庫
create database t1;
create table test(id int(11) not null, name varchar(20) not null);
# 這些建立完之後，從庫也會有
本作品採用《CC 協議》，轉載必須註明作者和本文連結
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