MySQL: UUIDs must be different for replication to work

Preparing a new MySQL Replication Infrastructure (on Ubuntu) for running System.

 

 mysql> SHOW SLAVE STATUS , got:

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.

 

Identified that because of the UUID duplicated. Because of the same VM copy.

$ sudo cat /var/lib/mysql/auto.cnf
[auto]
server-uuid=f3ddf669-3e76-11eb-a627-0050568dded3

 

 

Required to change it Then, auto rebuilt it.

$ sudo mv /var/lib/mysql/auto.cnf /var/lib/mysql/auto.cnf~

 

$ sudo systemctl restart mysql

 

$ sudo cat /var/lib/mysql/auto.cnf
[auto]
server-uuid=a7e111ba-45c9-11eb-b0d5-0050568db87d

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