On Thu, Mar 19, 2020 at 6:19 AM Eugen Block <eblock@xxxxxx> wrote: > > Hi, > > one workaround would be to create a protected snapshot on the primary > image which is also mirrored, and then clone that snapshot on the > remote site. That clone can be accessed as required. +1. This is the correct approach. If you are using a Mimic+ cluster (i.e. require OSD release >= Mimic), you can use skip the protect step. > I'm not sure if there's a way to directly access the remote image > since it's read-only. > > Regards, > Eugen > > > Zitat von Ml Ml <mliebherr99@xxxxxxxxxxxxxx>: > > > Hello, > > > > my goal is to back up a proxmox cluster with rbd-mirror for desaster > > recovery. Promoting/Demoting, etc.. works great. > > > > But how can i access a single file on the mirrored cluster? I tried: > > > > root@ceph01:~# rbd-nbd --read-only map cluster5-rbd/vm-114-disk-1 > > --cluster backup > > /dev/nbd1 > > > > But i get: > > root@ceph01:~# fdisk -l /dev/nbd1 > > fdisk: cannot open /dev/nbd1: Input/output error > > > > dmesg shows stuff like: > > [Thu Mar 19 09:29:55 2020] nbd1: unable to read partition table > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > > > Here is my state: > > > > root@ceph01:~# rbd --cluster backup mirror pool status cluster5-rbd --verbose > > health: OK > > images: 3 total > > 3 replaying > > > > vm-106-disk-0: > > global_id: 0bc18ee1-1749-4787-a45d-01c7e946ff06 > > state: up+replaying > > description: replaying, master_position=[object_number=3, tag_tid=2, > > entry_tid=3], mirror_position=[object_number=3, tag_tid=2, > > entry_tid=3], entries_behind_master=0 > > last_update: 2020-03-19 09:29:17 > > > > vm-114-disk-1: > > global_id: 2219ffa9-a4e0-4f89-b352-ff30b1ffe9b9 > > state: up+replaying > > description: replaying, master_position=[object_number=390, > > tag_tid=6, entry_tid=334290], mirror_position=[object_number=382, > > tag_tid=6, entry_tid=328526], entries_behind_master=5764 > > last_update: 2020-03-19 09:29:17 > > > > vm-115-disk-0: > > global_id: 2b0af493-14c1-4b10-b557-84928dc37dd1 > > state: up+replaying > > description: replaying, master_position=[object_number=72, > > tag_tid=1, entry_tid=67796], mirror_position=[object_number=72, > > tag_tid=1, entry_tid=67796], entries_behind_master=0 > > last_update: 2020-03-19 09:29:17 > > > > More dmesg stuff: > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:29:55 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] blk_update_request: 95 callbacks suppressed > > [Thu Mar 19 09:30:02 2020] blk_update_request: I/O error, dev nbd1, sector 0 > > [Thu Mar 19 09:30:02 2020] buffer_io_error: 94 callbacks suppressed > > [Thu Mar 19 09:30:02 2020] Buffer I/O error on dev nbd1, logical block > > 0, async page read > > [Thu Mar 19 09:30:02 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] blk_update_request: I/O error, dev nbd1, sector 1 > > [Thu Mar 19 09:30:02 2020] Buffer I/O error on dev nbd1, logical block > > 1, async page read > > [Thu Mar 19 09:30:02 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] blk_update_request: I/O error, dev nbd1, sector 2 > > [Thu Mar 19 09:30:02 2020] Buffer I/O error on dev nbd1, logical block > > 2, async page read > > [Thu Mar 19 09:30:02 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] blk_update_request: I/O error, dev nbd1, sector 3 > > [Thu Mar 19 09:30:02 2020] Buffer I/O error on dev nbd1, logical block > > 3, async page read > > [Thu Mar 19 09:30:02 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] blk_update_request: I/O error, dev nbd1, sector 4 > > [Thu Mar 19 09:30:02 2020] Buffer I/O error on dev nbd1, logical block > > 4, async page read > > [Thu Mar 19 09:30:02 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] blk_update_request: I/O error, dev nbd1, sector 5 > > [Thu Mar 19 09:30:02 2020] Buffer I/O error on dev nbd1, logical block > > 5, async page read > > [Thu Mar 19 09:30:02 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] blk_update_request: I/O error, dev nbd1, sector 6 > > [Thu Mar 19 09:30:02 2020] Buffer I/O error on dev nbd1, logical block > > 6, async page read > > [Thu Mar 19 09:30:02 2020] block nbd1: Other side returned error (30) > > [Thu Mar 19 09:30:02 2020] blk_update_request: I/O error, dev nbd1, sector 7 > > [Thu Mar 19 09:30:02 2020] Buffer I/O error on dev nbd1, logical block > > 7, async page read > > > > Do i have to stop the replaying or how can i mount the image on the > > backup cluster? > > > > Thanks, > > Michael > > _______________________________________________ > > ceph-users mailing list -- ceph-users@xxxxxxx > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > -- Jason _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |