Dear Community, I call for your wisdom, as it appears that googling for keywords doesn't help much. I have a glusterfs volume with replica count 2, and I tried to perform the online upgrade procedure described in the docs (http://gluster.readthedocs.io/en/latest/Upgrade-Guide/upgrade_to_3.10/). It all went almost fine when I'd done with the first replica, the only problem was the self-heal procedure that refused to complete until I commented out all IPv6 entries in the /etc/hosts. So far, being sure that it all should work on the 2nd replica pretty the same as it was on the 1st one, I had proceeded with the upgrade on the replica 2. All of a sudden, it told me that it doesn't see the first replica at all. The state before upgrade was: sst2# gluster volume status Status of volume: gv0 Gluster process TCP Port RDMA Port Online Pid ------------------------------------------------------------------------------ Brick sst0:/var/glusterfs 49152 0 Y 3482 Brick sst2:/var/glusterfs 49152 0 Y 29863 NFS Server on localhost 2049 0 Y 25175 Self-heal Daemon on localhost N/A N/A Y 25283 NFS Server on sst0 N/A N/A N N/A Self-heal Daemon on sst0 N/A N/A Y 4827 NFS Server on sst1 N/A N/A N N/A Self-heal Daemon on sst1 N/A N/A Y 15009 Task Status of Volume gv0 ------------------------------------------------------------------------------ There are no active volume tasks sst2# gluster peer status Number of Peers: 2 Hostname: sst0 Uuid: 26b35bd7-ad7e-4a25-a3f9-70002771e1fc State: Peer in Cluster (Connected) Hostname: sst1 Uuid: 5a2198de-f536-4328-a278-7f746f276e35 State: Sent and Received peer request (Connected) sst2# gluster volume heal gv0 info Brick sst0:/var/glusterfs Number of entries: 0 Brick sst2:/var/glusterfs Number of entries: 0 After upgrade, it looked like this: sst2# gluster volume status Status of volume: gv0 Gluster process TCP Port RDMA Port Online Pid ------------------------------------------------------------------------------ Brick sst2:/var/glusterfs N/A N/A N N/A NFS Server on localhost N/A N/A N N/A NFS Server on localhost N/A N/A N N/A Task Status of Volume gv0 ------------------------------------------------------------------------------ There are no active volume tasks sst2# gluster peer status Number of Peers: 2 Hostname: sst1 Uuid: 5a2198de-f536-4328-a278-7f746f276e35 State: Sent and Received peer request (Connected) Hostname: sst0 Uuid: 26b35bd7-ad7e-4a25-a3f9-70002771e1fc State: Peer Rejected (Connected) My biggest fault probably, at that point I googled and found this article https://gluster.readthedocs.io/en/latest/Administrator%20Guide/Resolving%20Peer%20Rejected/ -- and followed its advice, removing at sst2 all the /var/lib/glusterd contents except the glusterd.info file. As the result, the node, predictably, lost all information about the volume. sst2# gluster volume status No volumes present sst2# gluster peer status Number of Peers: 2 Hostname: sst0 Uuid: 26b35bd7-ad7e-4a25-a3f9-70002771e1fc State: Accepted peer request (Connected) Hostname: sst1 Uuid: 5a2198de-f536-4328-a278-7f746f276e35 State: Accepted peer request (Connected) Okay, I thought, this is might be a high time to re-add the brick. Not that easy, Jack: sst0# gluster volume add-brick gv0 replica 2 'sst2:/var/glusterfs' volume add-brick: failed: Operation failed The reason appeared to be natural: sst0 still knows that there was the replica on sst2. What should I do then? At this point, I tried to recover the volume information on sst2 by putting it offline and copying all the volume info from the sst0. Of course it wasn't enough to just copy as is, I modified /var/lib/glusterd/vols/gv0/sst*\:-var-glusterfs, setting listen-port=0 for the remote brick (sst0) and listen-port=49152 for the local brick (sst2). It didn't help much, unfortunately. The final state I've reached is as follows: sst2# gluster peer status Number of Peers: 2 Hostname: sst1 Uuid: 5a2198de-f536-4328-a278-7f746f276e35 State: Sent and Received peer request (Connected) Hostname: sst0 Uuid: 26b35bd7-ad7e-4a25-a3f9-70002771e1fc State: Sent and Received peer request (Connected) sst2# gluster volume info Volume Name: gv0 Type: Replicate Volume ID: dd4996c0-04e6-4f9b-a04e-73279c4f112b Status: Started Snapshot Count: 0 Number of Bricks: 1 x 2 = 2 Transport-type: tcp Bricks: Brick1: sst0:/var/glusterfs Brick2: sst2:/var/glusterfs Options Reconfigured: cluster.self-heal-daemon: enable performance.readdir-ahead: on storage.owner-uid: 1000 storage.owner-gid: 1000 sst2# gluster volume status Status of volume: gv0 Gluster process TCP Port RDMA Port Online Pid ------------------------------------------------------------------------------ Brick sst2:/var/glusterfs N/A N/A N N/A NFS Server on localhost N/A N/A N N/A NFS Server on localhost N/A N/A N N/A Task Status of Volume gv0 ------------------------------------------------------------------------------ There are no active volume tasks Meanwhile, on sst0: sst0# gluster volume info Volume Name: gv0 Type: Replicate Volume ID: dd4996c0-04e6-4f9b-a04e-73279c4f112b Status: Started Snapshot Count: 0 Number of Bricks: 1 x 2 = 2 Transport-type: tcp Bricks: Brick1: sst0:/var/glusterfs Brick2: sst2:/var/glusterfs Options Reconfigured: storage.owner-gid: 1000 storage.owner-uid: 1000 performance.readdir-ahead: on cluster.self-heal-daemon: enable sst0 ~ # gluster volume status Status of volume: gv0 Gluster process TCP Port RDMA Port Online Pid ------------------------------------------------------------------------------ Brick sst0:/var/glusterfs 49152 0 Y 31263 NFS Server on localhost N/A N/A N N/A Self-heal Daemon on localhost N/A N/A Y 31254 Task Status of Volume gv0 ------------------------------------------------------------------------------ There are no active volume tasks Any ideas how to bring the sst2 back to normal are appreciated. As a last resort solution, I can schedule the downtime, backup data, kill the volume and start all over, but I would like to know if there is a shorter path. Thank you very much in advance. -- Best Regards, Seva Gluschenko _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://lists.gluster.org/mailman/listinfo/gluster-users
