环境规划
192.168.31.178 Master/Slave
192.168.31.179 Master/Slave
192.168.31.178 配置
gtid-mode=ON
enforce_gtid_consistency=on
log-slave-updates=true
master-info-repository=TABLE
relay-log-info-repository=TABLE
relay_log = /data/mysql/relay.log
relay_log_index = /data/mysql/relay_log.index
report-port = 3306
sync-master-info=1
slave_parallel_workers=5
binlog-checksum=CRC32
master-verify-checksum=1
slave-sql-verify-checksum=1
binlog-rows-query-log_events=1
auto-increment-increment = 2
auto-increment-offset = 1
slave-skip-errors = all
skip-slave-start = 1 #防止复制随着mysql启动而自动启动
slave-parallel-type = LOGICAL_CLOCK
server-id = 1
192.168.31.179 配置
gtid-mode=ON
enforce_gtid_consistency=on
log-slave-updates=true
master-info-repository=TABLE
relay-log-info-repository=TABLE
relay_log = /data/mysql/relay.log
relay_log_index = /data/mysql/relay_log.index
report-port = 3306
sync-master-info=1
slave_parallel_workers=5
binlog-checksum=CRC32
master-verify-checksum=1
slave-sql-verify-checksum=1
binlog-rows-query-log_events=1
auto-increment-increment = 2
auto-increment-offset = 2
slave-parallel-type = LOGICAL_CLOCK
slave-skip-errors = all
skip-slave-start = 1 #防止复制随着mysql启动而自动启动
server-id = 11
创建同步用户和备份最新数据的数据库
两台数据库都要执行
grant replication slave on . to 'ops'@'192.168.10.%' identified by 'ops123';
flush privileges;
最新数据库执行备份最新的数据
mysqldump -uroot -p --single-transaction --default-character-set=utf8 --master-data=2 --flush-logs --triggers --routines --events --all-databases > all.sql
**在对应的从库执行导入sql
**scp all.sql 192.168.1.179:/data/
切换到179服务器导入sql文件
source /data/all.sql
连接主从
192.168.1.178
CHANGE MASTER TO
MASTER_HOST = '192.168.31.179',
MASTER_PORT = 3306,
MASTER_USER = 'ops',
MASTER_PASSWORD = 'ops123',
MASTER_AUTO_POSITION = 1;
192.168.1.179
CHANGE MASTER TO
MASTER_HOST = '192.168.31.178',
MASTER_PORT = 3306,
MASTER_USER = 'ops',
MASTER_PASSWORD = 'ops123',
MASTER_AUTO_POSITION = 1;
测试环境
192.168.31.178
MySQL [(none)]> show slave status\G
1. row **
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.31.179
Master_User: ops
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000007
Read_Master_Log_Pos: 38729
Relay_Log_File: relay.000006
Relay_Log_Pos: 367
Relay_Master_Log_File: mysql-bin.000007
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: 38729
Relay_Log_Space: 954
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: 0Master_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: 11
Master_UUID: 64d5d956-a3e7-11ea-9725-000c29e5421a
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: c6617d6e-a3e4-11ea-bb0d-000c29f6218f:1-8
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version: 192.168.31.179
MySQL [(none)]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.31.178
Master_User: ops
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000012
Read_Master_Log_Pos: 38769
Relay_Log_File: relay.000006
Relay_Log_Pos: 38942
Relay_Master_Log_File: mysql-bin.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: 38769
Relay_Log_Space: 39529
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: c6617d6e-a3e4-11ea-bb0d-000c29f6218f
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: c6617d6e-a3e4-11ea-bb0d-000c29f6218f:3-8
Executed_Gtid_Set: c6617d6e-a3e4-11ea-bb0d-000c29f6218f:1-8
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Retrieved_Gtid_Set: c6617d6e-a3e4-11ea-bb0d-000c29f6218f:3-8 #表示收到的事务数
Executed_Gtid_Set: c6617d6e-a3e4-11ea-bb0d-000c29f6218f:1-8 #表示执行完的事务数
如果主从报错 需要从这两个参数去重新启动规划主从
假如主从复制出现错误
当在 slave 上执行 show slave status\G
Retrieved_Gtid_Set: $UUID:3-9
Executed_Gtid_Set: $UUID:1-8
此时 Slave_SQL_Running: No
上面的信息表明：
slave 收到了 UUID:3-9 个事务，执行成功 UUID:1-8，1-8表示已经执行完成了。在这里出现了错误，也就是说执行 UUID:1-9时出现了错误。所以我们应该要跳过下一个事务即 9；
**解决方法：
按照下列步骤执行**
mysql> stop slave;
mysql> set gtid_next='$UUID:9';
mysql> begin;
mysql> commit;
mysql> set gtid_next='automatic';
mysql> start slave;
在跳过之前，分析一下 Binlog 并且记录下来，分析是否可以跳过。跳过之后，看一下主从数据是否一致，是否需要修复数据等等，请谨慎操作。可以使用mysqlcheck来修复数据
