I've just recently taken on the task of looking after our mySQL databases, and have been given the task of setting master-master replication. We have a live server which has a mySQL database which is constantly receiving data and a backup server which has been configured as a replication slave to the master. What I need to do now is set the live server up as a slave to the backup. I have an idea of what is necessary, and I guess I'm just looking for someone to confirm I've got it right before I go and do it (or tell me a better way of doing it).
- Create slave user on backup-server
- Grant replication privileges to the user
- stop slave on backup-server
- set database lock(read only) on live-server so no new data can be added (and hence replicated to backup)
- Get master status from backup-server
-open new ssh session to live-server and issue change master command to point at backup-server - start slave on live
- unlock database on live
- start slave on backup
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