MySQL的主从复制与主从切换详解

MySQL的主从复制与主从切换详解

  • 一、MySql主从节点的搭建
    • [一、 master主节点的搭建](#一、 master主节点的搭建)
        • [1. 查看是否开启bin_log日志](#1. 查看是否开启bin_log日志)
        • [2. MySQL开启log_bin功能](#2. MySQL开启log_bin功能)
        • [3. 创建主从复制用户并授权](#3. 创建主从复制用户并授权)
        • [4. mysql数据库状态查看](#4. mysql数据库状态查看)
        • [5. 主节点锁表并进行数据备份](#5. 主节点锁表并进行数据备份)
    • 二、solve从节点的搭建
        • [1. 配置文件添加内容](#1. 配置文件添加内容)
        • [2. 同步主库数据并授权](#2. 同步主库数据并授权)
        • [3. 主库解除锁定](#3. 主库解除锁定)
        • [4. 开启从节点](#4. 开启从节点)
        • [5. 检查从节点状态](#5. 检查从节点状态)
        • [6. 确认主从复制开启成功](#6. 确认主从复制开启成功)
          • [1. 查看主节点相关信息](#1. 查看主节点相关信息)
          • [2. 查看从节点相关信息](#2. 查看从节点相关信息)
  • [二、主从同步失败问题定位,Slave_IO_Running: No](#二、主从同步失败问题定位,Slave_IO_Running: No)
  • 三、MSQL主从切换操作

一、MySql主从节点的搭建

一、 master主节点的搭建

1. 查看是否开启bin_log日志

注: 若log_bin为ON表示已启用bin_log日志,为OFF表示未开启,则需执行下一步开启log_bin功能

复制代码
mysql> show global variables like 'log_bin%';
+---------------------------------+------------------------------+
| Variable_name                   | Value                        |
+---------------------------------+------------------------------+
| log_bin                         | ON                           |# ON为开启,OFF关闭
| log_bin_basename                | /mysqld/data/mysql-bin       |
| log_bin_index                   | /mysqld/data/mysql-bin.index |
| log_bin_trust_function_creators | OFF                          |
| log_bin_use_v1_row_events       | OFF                          |
+---------------------------------+------------------------------+
2. MySQL开启log_bin功能
  • 修改mysql配置文件my.cnf 添加内容如下
bash 复制代码
[root@localhost ~]# vi my.cnf
[mysqld]
log-bin=mysql-bin  #指定并激活mysql二进制文件名称
server-id = 1   #设置server-id 为1 代表开启二进制,若为0代表禁止二进制,mysql8.0默认为1,8.0以前默认为0
  • 此台服务器mysql完整配置在这里!

    [mysqld]
    skip-name-resolve
    default_storage_engine = InnoDB
    basedir = /opt/rdapp/mysqld
    datadir = /opt/rdapp/mysqld/data
    port=3306
    #socket = /opt/rdapp/mysqld/pid/mysql.sock
    pid-file = /opt/rdapp/mysqld/pid/mysql.pid
    log-error = /opt/rdapp/mysqld/logs/err.log
    log_error_verbosity = 3
    default_authentication_plugin = mysql_native_password
    skip-log-bin
    back_log = 600 #mysql等待连接的堆栈大小
    lower_case_table_names = 1 #不区分表的大小写
    max_allowed_packet = 1024M #接收数据包的大小
    binlog_cache_size = 8M
    max_connections = 1000 #最大连接数
    open_files_limit = 65535 #打开文件描述符限制
    table_open_cache = 1024 #表缓存
    read_buffer_size = 2M #读入缓冲区大小
    read_rnd_buffer_size = 8M #随机读取缓冲区大小
    sort_buffer_size = 8M #执行排序使用的缓冲区大小
    join_buffer_size = 8M #联合查询操作使用的缓冲区大小
    thread_cache_size = 64 #可以重新利用保存在缓存中线程的数量
    key_buffer_size = 4M #指定���于索引的缓冲区大小
    slow_query_log = 1 #慢日志
    long_query_time = 3 #慢查询时间,超过3秒则为慢查询
    slow_query_log_file= /opt/rdapp/mysqld/logs/slow.log #慢日志保存位置
    default-storage-engine = InnoDB #默认存储引擎
    innodb_buffer_pool_size = 512M #innodb缓冲池大小
    innodb_write_io_threads = 4
    innodb_read_io_threads = 4
    innodb_thread_concurrency = 0 #默认为0,表示不限制并发数
    innodb_purge_threads = 1
    innodb_flush_log_at_trx_commit = 2 #日志刷新级别
    innodb_log_buffer_size = 2M
    innodb_log_file_size = 64M
    innodb_log_files_in_group = 3 #以以循环方式将日志文件写到多个文件。推荐设置为3
    innodb_max_dirty_pages_pct = 90 #innodb主线程刷新缓存池中的数据,使脏数据比例小于90%
    innodb_lock_wait_timeout = 120 #InnoDB事务在被回滚之前可以等待一个锁定的超时秒数
    log_bin = mysql-bin
    #binlog_format = mixed
    binlog_expire_logs_seconds = 2592000 #超过30天的binlog删除
    log-bin-trust-function-creators = 1
    sql_mode = "STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION"
    character_set_server = utf8mb4
    #collation_server = utf8mb4_general_ci
    general_log = on
    general_log_file = /opt/rdapp/mysqld/logs/general.log
    plugin-load-add = connection_control.so
    interactive_timeout = 900
    wait_timeout = 900
    connection_control_failed_connections_threshold = 0
    connection_control_min_connection_delay = 15000
    connection_control_max_connection_delay = 30000
    #skip-name-resolve
    #host_cache_size=10

    #MGR集群
    disabled_storage_engines = "MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,MEMORY"
    server_id = 2
    gtid_mode = ON
    enforce_gtid_consistency = ON
    binlog_checksum = NONE
    log_slave_updates = ON
    binlog_format = ROW
    #sql_require_primary_key = ON
    master_info_repository = TABLE
    relay_log_info_repository = TABLE
    transaction_write_set_extraction = XXHASH64
    plugin_load_add='group_replication.so'
    group_replication_group_name = "f5b933ac-d49d-11eb-b9bf-005056863e69"
    group_replication_start_on_boot = on
    group_replication_local_address = "mysqlnode2.service.rdapp.internal:33061"
    group_replication_group_seeds = "mysqlnode1.service.rdapp.internal:33061,mysqlnode2.service.rdapp.internal:33061"
    group_replication_bootstrap_group = off
    report_host = "mysqlnode2.service.rdapp.internal"
    group_replication_transaction_size_limit = 150000000 #组复制最大事务大小大小限制
    group_replication_consistency = before
    group_replication_communication_max_message_size = 10M
    group_replication_flow_control_certifier_threshold = 25000
    group_replication_autorejoin_tries = 10
    group_replication_member_expel_timeout = 60
    binlog_transaction_dependency_tracking = writeset
    slave_parallel_type = LOGICAL_CLOCK
    slave_preserve_commit_order = ON
    slave_checkpoint_period = 2
    slave_checkpoint_group = 256

    [client]
    port = 3306
    socket = /opt/rdapp/mysqld/pid/mysql.sock

    [mysqldump]
    quick
    max_allowed_packet = 512M #服务器发送和接受的最大包长度
    [myisamchk]
    key_buffer_size = 8M
    sort_buffer_size = 8M
    read_buffer = 4M
    write_buffer = 4M

3. 创建主从复制用户并授权
bash 复制代码
# 登录作为主节点的mysql
[root@localhost mysqld]# /opt/rdapp/mysqld/mysqld-os/mysqld/bin/mysql -h 10.8.109.165  -urdapp -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 8.0.25 MySQL Community Server - GPL
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.


# mysql内输入下面的命令
mysql> create user 'repl'@'%' identified by 'Nucleus!';
Query OK, 0 rows affected (0.02 sec)

mysql> grant replication slave on *.* to 'repl'@'%';
Query OK, 0 rows affected (0.01 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.41 sec)

mysql> select user,host from  mysql.user;
+------------------+-----------+
| user             | host      |
+------------------+-----------+
| hl               | %         |
| rdapp            | %         |
| repl             | %         |
| auditor          | 127.0.0.1 |
| reraat           | 127.0.0.1 |
| security         | 127.0.0.1 |
| systemadmin      | 127.0.0.1 |
| mysql.infoschema | localhost |
| mysql.session    | localhost |
| mysql.sys        | localhost |
| rdapp            | localhost |
+------------------+-----------+
11 rows in set (0.00 sec)
4. mysql数据库状态查看
bash 复制代码
# 查看mysql的数据库
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.00 sec)

# 查看log_bin信息
mysql> show global variables like 'log_bin%';
+---------------------------------+------------------------------+
| Variable_name                   | Value                        |
+---------------------------------+------------------------------+
| log_bin                         | ON                           |
| log_bin_basename                | /mysqld/data/mysql-bin       |
| log_bin_index                   | /mysqld/data/mysql-bin.index |
| log_bin_trust_function_creators | OFF                          |
| log_bin_use_v1_row_events       | OFF                          |
+---------------------------------+------------------------------+


# 查看主节点的状态信息
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000004 |      156 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
# mysql-bin.000004 指二进制的名称 
# 数据库的变更标识
# 复制哪个库
# 不允许复制哪个库
# 是否激活gtid
5. 主节点锁表并进行数据备份
  • 备份数据后面导入从节点,保证主从数据库起始数据一致
bash 复制代码
[root@localhost ~]# /opt/rdapp/mysqld/mysqld-os/mysqld/bin/mysql -h 10.8.109.165  -urdapp -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 17
Server version: 8.0.25 MySQL Community Server - GPL

Copyright (c) 2000, 2021, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
#锁表
mysql> FLUSH TABLES WITH READ LOCK;
Query OK, 0 rows affected (0.00 sec)
#数据备份
[root@localhost ~]# /opt/rdapp/mysqld/mysqld-os/mysqld/bin/mysqldump -h127.0.0.1 -ureraat -p --all-databases --triggers --routines --events  > /root/data.sql
Enter password:

#解表
[root@localhost ~]# UNLOCK TABLES;

二、solve从节点的搭建

1. 配置文件添加内容
  • 修改mysql配置文件my.cnf 添加内容如下
bash 复制代码
[root@lopocalhost mysqld]# vi my.cnf                                                                                                                                                                                                                                                                    nnnnnnnn
[mysqld]
server-id = 21   # server-id必须是唯一的,与master节点不同就可以
2. 同步主库数据并授权
bash 复制代码
# 登录将作为从节点的mysql
[root@localhost mysqld]# /opt/rdapp/mysqld/mysqld-os/mysqld/bin/mysql -h 10.8.109.166  -urdapp -pxxx
# mysql内输入下面的命令
#  从库导入主库导出的数据data.sql,确保主从数据库内容一致
mysql> source /root/data.sql ;

mysql> CHANGE MASTER TO
    -> master_host='10.8.109.165',
    -> MASTER_USER='repl',
    -> master_password='Nucleus!',
    -> MASTER_LOG_FILE='mysql-bin.000005',
    -> MASTER_LOG_POS=1;
Query OK, 0 rows affected, 7 warnings (0.00 sec)
3. 主库解除锁定
bash 复制代码
[root@localhost ~]# /opt/rdapp/mysqld/mysqld-os/mysqld/bin/mysql -h 10.8.109.165  -urdapp -pxxx
#解表
[root@localhost ~]# UNLOCK TABLES;
4. 开启从节点

mysql> start slave;

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

5. 检查从节点状态
复制代码
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.8.109.165
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000010
          Read_Master_Log_Pos: 156
               Relay_Log_File: localhost-relay-bin.000005
                Relay_Log_Pos: 371
        Relay_Master_Log_File: mysql-bin.000010
             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: 752
              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: 400f2c2b-e2bb-11ee-8f85-00505686c1d1
             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:
1 row in set, 1 warning (0.00 sec)

ERROR:
No query specified

mysql> show variables like 'server_uuid';
+---------------+--------------------------------------+
| Variable_name | Value                                |
+---------------+--------------------------------------+
| server_uuid   | 05e7063e-908d-11ec-9916-00505686574e |
+---------------+--------------------------------------+
1 row in set (0.00 sec)
6. 确认主从复制开启成功
1. 查看主节点相关信息
bash 复制代码
mysql> show processlist;
+----+-----------------+--------------------+------+-------------+------+---------------------------------------------------------------+------------------+
| Id | User            | Host               | db   | Command     | Time | State                 | Info             |
+----+-----------------+--------------------+------+-------------+------+---------------------------------------------------------------+------------------+
|  5 | event_scheduler | localhost          | NULL | Daemon      |  316 | Waiting on empty queue                 | NULL             |
| 14 | rdapp           | 10.8.109.165:44440 | NULL | Query       |    0 | init                 | show processlist |
| 19 | repl            | 10.8.109.166:48682 | NULL | Binlog Dump |  151 | Master has sent all binlog to slave; waitingfor more updates | NULL             |
+----+-----------------+--------------------+------+-------------+------+---------------------------------------------------------------+------------------+
3 rows in set (0.00 sec)

mysql> show databases;
2. 查看从节点相关信息
bash 复制代码
mysql> show processlist;
+----+-----------------+--------------------+------+---------+------+--------------------------------------------------------+------------------+
| Id | User            | Host               | db   | Command | Time | State      | Info             |
+----+-----------------+--------------------+------+---------+------+--------------------------------------------------------+------------------+
|  5 | system user     | connecting host    | NULL | Connect |  132 | Waiting for master to send event      | NULL             |
|  6 | system user     |                    | NULL | Query   |  132 | Slave has read all relay log; waiting for more updates | NULL             |
|  7 | event_scheduler | localhost          | NULL | Daemon  |  132 | Waiting on empty queue      | NULL             |
| 11 | rdapp           | 10.8.109.165:38224 | orgs | Sleep   |    5 |      | NULL             |
| 15 | rdapp           | 10.8.109.166:40990 | NULL | Query   |    0 | init      | show processlist |
+----+-----------------+--------------------+------+---------+------+--------------------------------------------------------+------------------+
5 rows in set (0.00 sec)

二、主从同步失败问题定位,Slave_IO_Running: No

复制代码
# "Slave_IO_Running:  Yes" 和 "Slave_SQL_Running: Yes"  都是Yes才是正确的,否则都主从都有问题


# 查看从节点状态
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: 10.8.109.165
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000005
          Read_Master_Log_Pos: 4
               Relay_Log_File: server2-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000005
             Slave_IO_Running: No                   
            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: 4
              Relay_Log_Space: 156
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 13117
                Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.    ## 停掉备库实例,删除备库 data 文件夹下的的 auto.cnf 
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 1
                  Master_UUID:
             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: 240315 10:44:01
     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:
1 row in set, 1 warning (0.00 sec)

ERROR:
No query specified

问题:
*  Last_Error: Error 'Operation CREATE USER failed for 'repl'@'%'' on query. Default database: ''. Query: 'CREATE USER 'repl'@'%' IDENTIFIED WITH 'mysql_native_password' AS '*1E63BECE0EBF96B7F6F0167BB416443EF9079EB8''


1. 查看server_id是否不同
mysql>  show variables like 'server_id';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id     | 2     |
+---------------+-------+
1 row in set (0.00 sec)

2. 用户授权是否正确

3. uuid也需要不同
解决方法:停掉备库实例,删除备库 data 文件夹下的的 auto.cnf
具体操作如下:
[root@localhost data]# ls
auto.cnf    client-cert.pem  #ib_16384_0.dblwr  ibdata1      ib_logfile2   master1.pid       mysql-bin.000006  performance_schema  server-cert.pem  undo_001
ca-key.pem  client-key.pem   #ib_16384_1.dblwr  ib_logfile0  ibtmp1        mysql             mysql-bin.index   private_key.pem     server-key.pem   undo_002
ca.pem      cms              ib_buffer_pool     ib_logfile1  #innodb_temp  mysql-bin.000005  mysql.ibd         public_key.pem      sys
[root@localhost data]# rm -rf auto.cnf
[root@localhost data]# systemctl restart mysqld
[root@localhost data]# /opt/rdapp/mysqld/mysqld-os/mysqld/bin/mysql -h 10.8.109.165  -urdapp -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.25 MySQL Community Server - GPL
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

#查看uuid
mysql>  show variables like 'server_uuid';
+---------------+--------------------------------------+
| Variable_name | Value                                |
+---------------+--------------------------------------+
| server_uuid   | 400f2c2b-e2bb-11ee-8f85-00505686c1d1 |
+---------------+--------------------------------------+
1 row in set (0.01 sec)

三、MSQL主从切换操作

1、 从库10.8.109.166上执行操作如下

复制代码
# 停止从库的运行
mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

# 清空主从信息
mysql> reset slave all;
Query OK, 0 rows affected, 1 warning (0.00 sec)

# 关闭只读开启读写,转为新主库
mysql>  set global read_only=off;
Query OK, 0 rows affected (0.00 sec)

mysql>  set global super_read_only=off;
Query OK, 0 rows affected (0.00 sec)


# 查看二进制binlog文件的名称,此处是 mysql-bin.000006 (后面主节点切换到从要用)
mysql> show master status ;
+------------------+----------+--------------+------------------+--------------------------------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                          |
+------------------+----------+--------------+------------------+--------------------------------------------+
| mysql-bin.000006 |    87795 |              |                  | 400f2c2b-e2bb-11ee-8f85-00505686c1d1:1-136 |
+------------------+----------+--------------+------------------+--------------------------------------------+

2、主库10.8.109.165执行操作如下

复制代码
# 主库设置执行新主库复制链路,转为新从库,完成主从切换(注意:此处的MASTER_LOG_FILE='mysql-bin.000006'中mysql-bin.000006为上一步骤在原来的从节点查询到的结果)

mysql> CHANGE MASTER TO
    -> master_host='10.8.109.165',
    -> MASTER_USER='repl',
    -> master_password='Nucleus!',
    -> MASTER_LOG_FILE='mysql-bin.000006',        
    -> MASTER_LOG_POS=1;
Query OK, 0 rows affected, 7 warnings (0.01 sec)

# 开始运行从库
mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.01 sec)

# 查看从库状态
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 100.66.101.5
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000006
          Read_Master_Log_Pos: 87795
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 371
        Relay_Master_Log_File: mysql-bin.000006
             Slave_IO_Running: Yes     #此处必须为yes代表成功
            Slave_SQL_Running: Yes     #此处必须为yes代表成功
              Replicate_Do_DB:
          Replicate_Ignore_DB:
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table:
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 0
............................................................省略
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