Snapshotting with cache/tiering *is* supposed to work. Can you open a bug? -Sam On Thu, Aug 20, 2015 at 3:36 PM, Andrija Panic <andrija.panic@xxxxxxxxx> wrote: > This was related to the caching layer, which doesnt support snapshooting per > docs...for sake of closing the thread. > > On 17 August 2015 at 21:15, Voloshanenko Igor <igor.voloshanenko@xxxxxxxxx> > wrote: >> >> Hi all, can you please help me with unexplained situation... >> >> All snapshot inside ceph broken... >> >> So, as example, we have VM template, as rbd inside ceph. >> We can map it and mount to check that all ok with it >> >> root@test:~# rbd map cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5 >> /dev/rbd0 >> root@test:~# parted /dev/rbd0 print >> Model: Unknown (unknown) >> Disk /dev/rbd0: 10.7GB >> Sector size (logical/physical): 512B/512B >> Partition Table: msdos >> >> Number Start End Size Type File system Flags >> 1 1049kB 525MB 524MB primary ext4 boot >> 2 525MB 10.7GB 10.2GB primary lvm >> >> Than i want to create snap, so i do: >> root@test:~# rbd snap create >> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5@new_snap >> >> And now i want to map it: >> >> root@test:~# rbd map >> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5@new_snap >> /dev/rbd1 >> root@test:~# parted /dev/rbd1 print >> Warning: Unable to open /dev/rbd1 read-write (Read-only file system). >> /dev/rbd1 has been opened read-only. >> Warning: Unable to open /dev/rbd1 read-write (Read-only file system). >> /dev/rbd1 has been opened read-only. >> Error: /dev/rbd1: unrecognised disk label >> >> Even md5 different... >> root@ix-s2:~# md5sum /dev/rbd0 >> 9a47797a07fee3a3d71316e22891d752 /dev/rbd0 >> root@ix-s2:~# md5sum /dev/rbd1 >> e450f50b9ffa0073fae940ee858a43ce /dev/rbd1 >> >> >> Ok, now i protect snap and create clone... but same thing... >> md5 for clone same as for snap,, >> >> root@test:~# rbd unmap /dev/rbd1 >> root@test:~# rbd snap protect >> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5@new_snap >> root@test:~# rbd clone >> cold-storage/0e23c701-401d-4465-b9b4-c02939d57bb5@new_snap >> cold-storage/test-image >> root@test:~# rbd map cold-storage/test-image >> /dev/rbd1 >> root@test:~# md5sum /dev/rbd1 >> e450f50b9ffa0073fae940ee858a43ce /dev/rbd1 >> >> .... but it's broken... >> root@test:~# parted /dev/rbd1 print >> Error: /dev/rbd1: unrecognised disk label >> >> >> ========= >> >> tech details: >> >> root@test:~# ceph -v >> ceph version 0.94.2 (5fb85614ca8f354284c713a2f9c610860720bbf3) >> >> We have 2 inconstistent pgs, but all images not placed on this pgs... >> >> root@test:~# ceph health detail >> HEALTH_ERR 2 pgs inconsistent; 18 scrub errors >> pg 2.490 is active+clean+inconsistent, acting [56,15,29] >> pg 2.c4 is active+clean+inconsistent, acting [56,10,42] >> 18 scrub errors >> >> ============ >> >> root@test:~# ceph osd map cold-storage >> 0e23c701-401d-4465-b9b4-c02939d57bb5 >> osdmap e16770 pool 'cold-storage' (2) object >> '0e23c701-401d-4465-b9b4-c02939d57bb5' -> pg 2.74458f70 (2.770) -> up >> ([37,15,14], p37) acting ([37,15,14], p37) >> root@test:~# ceph osd map cold-storage >> 0e23c701-401d-4465-b9b4-c02939d57bb5@snap >> osdmap e16770 pool 'cold-storage' (2) object >> '0e23c701-401d-4465-b9b4-c02939d57bb5@snap' -> pg 2.793cd4a3 (2.4a3) -> up >> ([12,23,17], p12) acting ([12,23,17], p12) >> root@test:~# ceph osd map cold-storage >> 0e23c701-401d-4465-b9b4-c02939d57bb5@test-image >> osdmap e16770 pool 'cold-storage' (2) object >> '0e23c701-401d-4465-b9b4-c02939d57bb5@test-image' -> pg 2.9519c2a9 (2.2a9) >> -> up ([12,44,23], p12) acting ([12,44,23], p12) >> >> >> Also we use cache layer, which in current moment - in forward mode... >> >> Can you please help me with this.. As my brain stop to understand what is >> going on... >> >> Thank in advance! >> >> >> >> >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > > -- > > Andrija Panić > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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