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Replication on Slave is broken due to wrong password while executing change master to master command ... Still Maxscale shows slave as Slave, Running
change master to master_host='192.168.47.23', master_user='repuser', master_password='<wrong password>', master_port=3306 , MASTER_USE_GTID=slave_pos;
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MariaDB [test]> show slave status\G
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*************************** 1. row ***************************
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Slave_IO_State: Connecting to master
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Master_Host: 192.168.47.23
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Master_User: repuser
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Master_Port: 3306
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Connect_Retry: 60
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Master_Log_File:
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Read_Master_Log_Pos: 4
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Relay_Log_File: node_02-relay-bin.000001
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Relay_Log_Pos: 4
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Relay_Master_Log_File:
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Slave_IO_Running: Connecting
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Slave_SQL_Running: Yes
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Replicate_Do_DB:
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Replicate_Ignore_DB:
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Replicate_Do_Table:
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Replicate_Ignore_Table:
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Replicate_Wild_Do_Table:
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Replicate_Wild_Ignore_Table:
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Last_Errno: 0
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Last_Error:
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Skip_Counter: 0
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Exec_Master_Log_Pos: 4
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Relay_Log_Space: 256
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Until_Condition: None
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Until_Log_File:
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Until_Log_Pos: 0
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Master_SSL_Allowed: No
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Master_SSL_CA_File:
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Master_SSL_CA_Path:
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Master_SSL_Cert:
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Master_SSL_Cipher:
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Master_SSL_Key:
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Seconds_Behind_Master: NULL
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Master_SSL_Verify_Server_Cert: No
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Last_IO_Errno: 1045
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Last_IO_Error: error connecting to master 'repuser@192.168.47.23:3306' - retry-time: 60 maximum-retries: 100000 message: Access denied for user 'repuser'@'192.168.47.24' (using password: YES)
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Last_SQL_Errno: 0
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Last_SQL_Error:
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Replicate_Ignore_Server_Ids:
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Master_Server_Id: 1
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Master_SSL_Crl:
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Master_SSL_Crlpath:
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Using_Gtid: Slave_Pos
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Gtid_IO_Pos: 1-1-23991
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Replicate_Do_Domain_Ids:
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Replicate_Ignore_Domain_Ids:
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Parallel_Mode: optimistic
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SQL_Delay: 0
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SQL_Remaining_Delay: NULL
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Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
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Slave_DDL_Groups: 44
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Slave_Non_Transactional_Groups: 0
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Slave_Transactional_Groups: 23988
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1 row in set (0.000 sec)
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[root@max_02 tmp]# maxctrl list servers
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┌────────┬───────────────┬──────┬─────────────┬─────────────────┬────────────┐
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│ Server │ Address │ Port │ Connections │ State │ GTID │
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├────────┼───────────────┼──────┼─────────────┼─────────────────┼────────────┤
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│ node1 │ 192.168.47.23 │ 3306 │ 2 │ Master, Running │ 1-1-598192 │
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├────────┼───────────────┼──────┼─────────────┼─────────────────┼────────────┤
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│ node2 │ 192.168.47.24 │ 3306 │ 0 │ Slave, Running │ 1-1-23991 │
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└────────┴───────────────┴──────┴─────────────┴─────────────────┴────────────┘
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Maxscale configuration part :-
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[MySQLMonitor]
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type=monitor
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module=mariadbmon
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servers=node1,node2
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user= maxscale
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password= xxxxxxxxx
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replication_user=repuser
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replication_password=xxxxxxxxx
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monitor_interval=5000
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auto_failover=true
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auto_rejoin=true
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enforce_read_only_slaves=1
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backend_connect_timeout=10
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backend_read_timeout=10
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backend_write_timeout=10
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mariadbmon module may consider below parameter to validate the replication status on slave node.
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Slave_IO_Running: Connecting
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Slave_SQL_Running: Yes
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Seconds_Behind_Master: NULL
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Last_IO_Errno: XXXXXX
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Last_IO_Error: error connecting to master 'repuser@192.168.47.XX:3306' - retry-time: 60 maximum-retries: 100000 message: Access denied for user 'repuser'@'192.168.47.YY' (using password: YES)
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Validated with
STOP SLAVE IO_THREAD;
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STOP SLAVE SQL_THREAD;
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maxctrl list servers output is running as expected , Slave as Running. Only in case of Slave_IO_Running: Connecting , maxctrl list servers shows Slave as Slave, Running
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