Details
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Bug
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Status: Done
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Low
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Resolution: Fixed
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None
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None
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None
Description
**Reported in Launchpad by Johan Nilsson last update 02-05-2017 08:35:55
When running Percona Xtrabackup 2.4.1, the option --slave-info does not include channel name.
And as far as I can understand when reviewing the code, multiple channels will not work correctly...
- xtrabackup --version
xtrabackup version 2.4.1 based on MySQL server 5.7.10 Linux (x86_64) (revision id: a2dc9d4)
- mysql -e "select @@version
------------@@version ------------
5.7.11-log ------------
- mysql -e "show slave status\G"
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- 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: <host>
Master_User: <user>
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000003
Read_Master_Log_Pos: 151
Relay_Log_File: mysql-relay-<host>.000011
Relay_Log_Pos: 364
Relay_Master_Log_File: mysql-bin.000003
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: mysql.%
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 151
Relay_Log_Space: 747
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: 972
Master_UUID: 7095dd7c-d634-11e5-8252-6cae8b52a7ba
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: <channel>
Master_TLS_Version:
- 1. row ***************************
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- cat xtrabackup_slave_info
CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000003', MASTER_LOG_POS=151
Looking at storage/innobase/xtrabackup/innobackupex, it seems like the info for xtrabackup_slave_info is fetched from 'SHOW SLAVE STATUS', when I guess that the correct way should be to select information from mysql.slave_master_info, mysql.slave_relay_log_info and mysql.gtid_executed.
An alternative solution whould be to get configured channel names from mysql.slave_master_info, and then do 'SHOW SLAVE STATUS FOR CHANNEL $channel_name'