How to change GlusterFS replica 2 to replica 3 with arbiter 1?

Question

GlusterFS 3.7 introduced arbiter volume which it is a 3-way replication where the third brick is the arbiter.

How does one change from 2-way replication to 3-way replication with arbiter?

I could not find any documentation of changing running replica 2 volume to arbiter volume.

Reference: https://gluster.readthedocs.io/en/latest/Administrator%20Guide/arbiter-volumes-and-quorum/

Answer 1

Just sent the patch http://review.gluster.org/#/c/14502/ to add this functionality. If everything goes well, it should make it to the 3.8 release.