Red Hat Bugzilla – Bug 889630
gluster volume delete is not atomic
Last modified: 2013-07-24 13:45:12 EDT
Description of problem:
One can run "gluster volume delete <vol>" on a client (nothing wrong with that, I presume). Under some circumstances, it appears this can fail:
root@medusa:/var/lib/glusterd# gluster volume delete skateboard0
Deleting volume will erase all information about the volume. Do you want to continue? (y/n) y
Operation failed on skateboard-ib
However, it doesn't completely fail. It deletes part, but not all, of the associated metadata for the volume, leaving behind just enough that the server refuses to start:
[2012-12-21 11:43:28.594814] E [glusterd-store.c:1320:glusterd_store_handle_retrieve] 0-glusterd: Unable to retrieve store handle for /var/lib/glusterd/vols/skateboard0/info, error: No such file or directory
[2012-12-21 11:43:28.594879] E [glusterd-store.c:2184:glusterd_store_retrieve_volumes] 0-: Unable to restore volume: skateboard0
[2012-12-21 11:43:28.594914] E [xlator.c:385:xlator_init] 0-management: Initialization of volume 'management' failed, review your volfile again
[2012-12-21 11:43:28.594935] E [graph.c:294:glusterfs_graph_init] 0-management: initializing translator failed
[2012-12-21 11:43:28.594951] E [graph.c:483:glusterfs_graph_activate] 0-graph: init failed
[2012-12-21 11:43:28.595233] W [glusterfsd.c:831:cleanup_and_exit] (-->/usr/sbin/glusterd(main+0x32e) [0x7f8e1ed55b2e] (-->/usr/sbin/glusterd(glusterfs_volumes_init+0x191) [0x7f8e1ed58ad1] (-->/usr/sbin/glusterd(glusterfs_process_volfp+0x192) [0x7f8e1ed58932]))) 0-: received signum (0), shutting down
This is because, among other things, the directory /var/lib/glusterd/vols/skateboard0/ was not empty (it contained a pid file in the 'run' directory).
Please ensure that operations such as volume deletes are fully atomic: ie, they either fully succeed, or fully fail; not some unhappy in between state that causes the system to be unavailable.
Version-Release number of selected component (if applicable): 3.3.1
David, thanks for the report, and we too think this has to be fixed soon. Meantime, can you see the behavior in 3.4.0qa (qa6 is latest at the moment) releases?
KP, any idea if this is already fixed in master branch?
Could you please find out if it was "swift.pid" that you said you found in /var/lib/glusterd/vols/skateboard0/run/ ?
CHANGE: http://review.gluster.org/4639 (glusterd: Mark vol as deleted by renaming voldir before cleaning up the store) merged in master by Anand Avati (email@example.com)