graceful-master-takeover is not OK

[xiao...@gmail.com]

Hi,

    Three mysql node, one master,two slave。Three orchestrator raft mode, I try 'orchestrator-client  -c graceful-master-takeover -i mysql-a -d mysql-b', mysql-b  becomes master, mysql-c slave success,but mysql-a start slave report error!!!

Master_SSL_Verify_Server_Cert: No

                Last_IO_Errno: 1593

                Last_IO_Error: Fatal error: Invalid (empty) username when attempting to connect to the master server. Connection attempt terminated.

Retry change master to ***   

start slave;  is OK.  

Why????  Thanks..

[Shlomi Noach]

orchestrator does not know what the replication credentials are.

from https://github.com/github/orchestrator/blob/master/docs/install.md#grant-access-to-orchestrator-on-all-your-mysql-servers :

On MySQL 5.6 and above, and if using master_info_repository = 'TABLE', let orchestrator have access to the mysql.slave_master_info table. This will allow orchestrator to grab replication credentials if need be.

GRANT SELECT ON mysql.slave_master_info TO 'orchestrator'@'orch_host';

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