Red Hat Bugzilla – Bug 765437
[FEAT] Use uuid in volume info file for servers instead of hostname or ip address
Last modified: 2016-04-19 03:55:44 EDT
In the volume info file, if the servers were referenced by uuid if the hostnames or ip addresses of the hosts change, the bricks would still reference the correct machine.
In the IRC channel today, we had someone whose network had been renumbered. He had created his volumes using IP addresses instead of hostnames. He was able to peer probe which changed the host information to accurately reflect the new ip addresses, but the volumes still pointed at the old addresses. They could not run replace-brick to update the addresses of their bricks.
If the bricks were referenced by host uuid, the peer probe would have allowed the bricks to resolve to the new information without further changes.
because of the large number of bugs filed against mainline version\ is ambiguous and about to be removed as a choice.
If you believe this is still a bug, please change the status back to NEW and choose the appropriate, applicable version for it.
I myself encountered a situation where this feature would have prevented a disruption in my gluster volumes' availability after a hostname-change. Although detaching and re-attaching the peer was successful against the new hostname, at some point it reverted to the old hostname (which was to a different IP address), and my brick-hosts became detached as a result.