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
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