Doing some more testing.
I can demote the rbd image on the primary, promote on the secondary and the
image looks great. I can map it, mount it, and it looks just like it should.
However, the rbd snapshots are still unusable on the secondary even when
promoted. I went as far as taking a 2nd snapshot on the rbd before
demoting/promoting and that 2nd snapshot still won't work either. Both
snapshots look and work great on the primary.
If I request a resync from the secondary the rbd snapshots start working just
like the primary, but only if I request a resync.
I get the same exact results whether I am using a 15.2.8 or 16.1 client.
From: "adamb" <ad...@medent.com>
To: "dillaman" <dilla...@redhat.com>
Cc: "ceph-users" <ceph-users@ceph.io>, "Matt Wilder" <matt.wil...@bitmex.com>
Sent: Tuesday, January 26, 2021 1:51:13 PM
Subject: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
Did some testing with clients running 16.1. I setup two different clients, each
one dedicated to its perspective cluster. Running Proxmox, I compiled the
latest Pacific 16.1 build.
root@Ccspacificclient:/cephbuild/ceph/build/bin# ./ceph -v
*** DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
ceph version 16.1.0-8-g5f17c37f78 (5f17c37f78a331b7a4bf793890f9d324c64183e5)
pacific (rc)
root@Bunkpacificclient:/cephbuild/ceph/build/bin# ./ceph -v
*** DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
ceph version 16.1.0-8-g5f17c37f78 (5f17c37f78a331b7a4bf793890f9d324c64183e5)
pacific (rc)
Unfortunately, I am hitting the same exact issues using a pacific client.
Would this confirm that its something specific in 15.2.8 on the osd/mon nodes?
From: "Jason Dillaman" <jdill...@redhat.com>
To: "adamb" <ad...@medent.com>
Cc: "ceph-users" <ceph-users@ceph.io>, "Matt Wilder" <matt.wil...@bitmex.com>
Sent: Friday, January 22, 2021 3:44:26 PM
Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
On Fri, Jan 22, 2021 at 3:29 PM Adam Boyhan <ad...@medent.com> wrote:
>
> I will have to do some looking into how that is done on Proxmox, but most
> definitely.
Thanks, appreciate it.
> ________________________________
> From: "Jason Dillaman" <jdill...@redhat.com>
> To: "adamb" <ad...@medent.com>
> Cc: "ceph-users" <ceph-users@ceph.io>, "Matt Wilder" <matt.wil...@bitmex.com>
> Sent: Friday, January 22, 2021 3:02:23 PM
> Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
>
> Any chance you can attempt to repeat the process on the latest master
> or pacific branch clients (no need to upgrade the MONs/OSDs)?
>
> On Fri, Jan 22, 2021 at 2:32 PM Adam Boyhan <ad...@medent.com> wrote:
> >
> > The steps are pretty straight forward.
> >
> > - Create rbd image of 500G on the primary
> > - Enable rbd-mirror snapshot on the image
> > - Map the image on the primary
> > - Format the block device with ext4
> > - Mount it and write out 200-300G worth of data (I am using rsync with some
> > local real data we have)
> > - Unmap the image from the primary
> > - Create rdb snapshot
> > - Create rdb mirror snapshot
> > - Wait for copy process to complete
> > - Clone the rdb snapshot on secondary
> > - Map the image on secondary
> > - Try to mount on secondary
> >
> > Just as a reference. All of my nodes are the same.
> >
> > root@Bunkcephtest1:~# ceph --version
> > ceph version 15.2.8 (8b89984e92223ec320fb4c70589c39f384c86985) octopus
> > (stable)
> >
> > root@Bunkcephtest1:~# dpkg -l | grep rbd-mirror
> > ii rbd-mirror 15.2.8-pve2 amd64 Ceph daemon for mirroring RBD images
> >
> > This is pretty straight forward, I don't know what I could be missing here.
> >
> >
> > ________________________________
> > From: "Jason Dillaman" <jdill...@redhat.com>
> > To: "adamb" <ad...@medent.com>
> > Cc: "ceph-users" <ceph-users@ceph.io>, "Matt Wilder"
> > <matt.wil...@bitmex.com>
> > Sent: Friday, January 22, 2021 2:11:36 PM
> > Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
> >
> > Any chance you could write a small reproducer test script? I can't
> > repeat what you are seeing and we do have test cases that really
> > hammer random IO on primary images, create snapshots, rinse-and-repeat
> > and they haven't turned up anything yet.
> >
> > Thanks!
> >
> > On Fri, Jan 22, 2021 at 1:50 PM Adam Boyhan <ad...@medent.com> wrote:
> > >
> > > I have been doing a lot of testing.
> > >
> > > The size of the RBD image doesn't have any effect.
> > >
> > > I run into the issue once I actually write data to the rbd. The more data
> > > I write out, the larger the chance of reproducing the issue.
> > >
> > > I seem to hit the issue of missing the filesystem all together the most,
> > > but I have also had a few instances where some of the data was simply
> > > missing.
> > >
> > > I monitor the mirror status on the remote cluster until the snapshot is
> > > 100% copied and also make sure all the IO is done. My setup has no issue
> > > maxing out my 10G interconnect during replication, so its pretty obvious
> > > once its done.
> > >
> > > The only way I have found to resolve the issue is to call a mirror resync
> > > on the secondary array.
> > >
> > > I can then map the rbd on the primary, write more data to it, snap it
> > > again, and I am back in the same position.
> > >
> > > ________________________________
> > > From: "adamb" <ad...@medent.com>
> > > To: "dillaman" <dilla...@redhat.com>
> > > Cc: "ceph-users" <ceph-users@ceph.io>, "Matt Wilder"
> > > <matt.wil...@bitmex.com>
> > > Sent: Thursday, January 21, 2021 3:11:31 PM
> > > Subject: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
> > >
> > > Sure thing.
> > >
> > > root@Bunkcephtest1:~# rbd snap ls --all CephTestPool1/vm-100-disk-1
> > > SNAPID NAME SIZE PROTECTED TIMESTAMP NAMESPACE
> > > 12192 TestSnapper1 2 TiB Thu Jan 21 14:15:02 2021 user
> > > 12595
> > > .mirror.non_primary.a04e92df-3d64-4dc4-8ac8-eaba17b45403.34c4a53e-9525-446c-8de6-409ea93c5edd
> > > 2 TiB Thu Jan 21 15:05:02 2021 mirror (non-primary peer_uuids:[]
> > > 6c26557e-d011-47b1-8c99-34cf6e0c7f2f:12801 copied)
> > >
> > >
> > > root@Bunkcephtest1:~# rbd mirror image status CephTestPool1/vm-100-disk-1
> > > vm-100-disk-1:
> > > global_id: a04e92df-3d64-4dc4-8ac8-eaba17b45403
> > > state: up+replaying
> > > description: replaying,
> > > {"bytes_per_second":0.0,"bytes_per_snapshot":0.0,"local_snapshot_timestamp":1611259501,"remote_snapshot_timestamp":1611259501,"replay_state":"idle"}
> > >
> > > service: admin on Bunkcephmon1
> > > last_update: 2021-01-21 15:06:24
> > > peer_sites:
> > > name: ccs
> > > state: up+stopped
> > > description: local image is primary
> > > last_update: 2021-01-21 15:06:23
> > >
> > >
> > > root@Bunkcephtest1:~# rbd clone CephTestPool1/vm-100-disk-1@TestSnapper1
> > > CephTestPool1/vm-100-disk-1-CLONE
> > > root@Bunkcephtest1:~# rbd-nbd map CephTestPool1/vm-100-disk-1-CLONE
> > > /dev/nbd0
> > > root@Bunkcephtest1:~# blkid /dev/nbd0
> > > root@Bunkcephtest1:~# mount /dev/nbd0 /usr2
> > > mount: /usr2: wrong fs type, bad option, bad superblock on /dev/nbd0,
> > > missing codepage or helper program, or other error.
> > >
> > >
> > > Primary still looks good.
> > >
> > > root@Ccscephtest1:~# rbd clone CephTestPool1/vm-100-disk-1@TestSnapper1
> > > CephTestPool1/vm-100-disk-1-CLONE
> > > root@Ccscephtest1:~# rbd-nbd map CephTestPool1/vm-100-disk-1-CLONE
> > > /dev/nbd0
> > > root@Ccscephtest1:~# blkid /dev/nbd0
> > > /dev/nbd0: UUID="830b8e05-d5c1-481d-896d-14e21d17017d" TYPE="ext4"
> > > root@Ccscephtest1:~# mount /dev/nbd0 /usr2
> > > root@Ccscephtest1:~# cat /proc/mounts | grep nbd0
> > > /dev/nbd0 /usr2 ext4 rw,relatime 0 0
> > >
> > >
> > >
> > >
> > >
> > >
> > > From: "Jason Dillaman" <jdill...@redhat.com>
> > > To: "adamb" <ad...@medent.com>
> > > Cc: "Eugen Block" <ebl...@nde.ag>, "ceph-users" <ceph-users@ceph.io>,
> > > "Matt Wilder" <matt.wil...@bitmex.com>
> > > Sent: Thursday, January 21, 2021 3:01:46 PM
> > > Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
> > >
> > > On Thu, Jan 21, 2021 at 11:51 AM Adam Boyhan <ad...@medent.com> wrote:
> > > >
> > > > I was able to trigger the issue again.
> > > >
> > > > - On the primary I created a snap called TestSnapper for disk
> > > > vm-100-disk-1
> > > > - Allowed the next RBD-Mirror scheduled snap to complete
> > > > - At this point the snapshot is showing up on the remote side.
> > > >
> > > > root@Bunkcephtest1:~# rbd mirror image status
> > > > CephTestPool1/vm-100-disk-1
> > > > vm-100-disk-1:
> > > > global_id: a04e92df-3d64-4dc4-8ac8-eaba17b45403
> > > > state: up+replaying
> > > > description: replaying,
> > > > {"bytes_per_second":0.0,"bytes_per_snapshot":0.0,"local_snapshot_timestamp":1611247200,"remote_snapshot_timestamp":1611247200,"replay_state":"idle"}
> > > >
> > > > service: admin on Bunkcephmon1
> > > > last_update: 2021-01-21 11:46:24
> > > > peer_sites:
> > > > name: ccs
> > > > state: up+stopped
> > > > description: local image is primary
> > > > last_update: 2021-01-21 11:46:28
> > > >
> > > > root@Ccscephtest1:/etc/pve/priv# rbd snap ls --all
> > > > CephTestPool1/vm-100-disk-1
> > > > SNAPID NAME SIZE PROTECTED TIMESTAMP NAMESPACE
> > > > 11532 TestSnapper 2 TiB Thu Jan 21 11:21:25 2021 user
> > > > 11573
> > > > .mirror.primary.a04e92df-3d64-4dc4-8ac8-eaba17b45403.9525e4eb-41c0-499c-8879-0c7d9576e253
> > > > 2 TiB Thu Jan 21 11:35:00 2021 mirror (primary
> > > > peer_uuids:[debf975b-ebb8-432c-a94a-d3b101e0f770])
> > > >
> > > > Seems like the sync is complete, So I then clone it, map it and attempt
> > > > to mount it.
> > >
> > > Can you run "snap ls --all" on the non-primary cluster? The
> > > non-primary snapshot will list its status. On my cluster (with a much
> > > smaller image):
> > >
> > > #
> > > # CLUSTER 1
> > > #
> > > $ rbd --cluster cluster1 create --size 1G mirror/image1
> > > $ rbd --cluster cluster1 mirror image enable mirror/image1 snapshot
> > > Mirroring enabled
> > > $ rbd --cluster cluster1 device map -t nbd mirror/image1
> > > /dev/nbd0
> > > $ mkfs.ext4 /dev/nbd0
> > > mke2fs 1.45.5 (07-Jan-2020)
> > > Discarding device blocks: done
> > > Creating filesystem with 262144 4k blocks and 65536 inodes
> > > Filesystem UUID: 50e0da12-1f99-4d45-b6e6-5f7a7decaeff
> > > Superblock backups stored on blocks:
> > > 32768, 98304, 163840, 229376
> > >
> > > Allocating group tables: done
> > > Writing inode tables: done
> > > Creating journal (8192 blocks): done
> > > Writing superblocks and filesystem accounting information: done
> > > $ blkid /dev/nbd0
> > > /dev/nbd0: UUID="50e0da12-1f99-4d45-b6e6-5f7a7decaeff"
> > > BLOCK_SIZE="4096" TYPE="ext4"
> > > $ rbd --cluster cluster1 snap create mirror/image1@fs
> > > Creating snap: 100% complete...done.
> > > $ rbd --cluster cluster1 mirror image snapshot mirror/image1
> > > Snapshot ID: 6
> > > $ rbd --cluster cluster1 snap ls --all mirror/image1
> > > SNAPID NAME
> > > SIZE PROTECTED TIMESTAMP
> > > NAMESPACE
> > > 5 fs
> > > 1 GiB Thu Jan 21 14:50:24 2021
> > > user
> > > 6
> > > .mirror.primary.f9f692b8-2405-416c-9247-5628e303947a.39722e17-f7e6-4050-acf0-3842a5620d81
> > >
> > > 1 GiB Thu Jan 21 14:50:51 2021 mirror (primary
> > > peer_uuids:[cd643f30-4982-4caf-874d-cf21f6f4b66f])
> > >
> > > #
> > > # CLUSTER 2
> > > #
> > >
> > > $ rbd --cluster cluster2 mirror image status mirror/image1
> > > image1:
> > > global_id: f9f692b8-2405-416c-9247-5628e303947a
> > > state: up+replaying
> > > description: replaying,
> > > {"bytes_per_second":1140872.53,"bytes_per_snapshot":17113088.0,"local_snapshot_timestamp":1611258651,"remote_snapshot_timestamp":1611258651,"replay_state":"idle"}
> > >
> > > service: mirror.0 on cube-1
> > > last_update: 2021-01-21 14:51:18
> > > peer_sites:
> > > name: cluster1
> > > state: up+stopped
> > > description: local image is primary
> > > last_update: 2021-01-21 14:51:27
> > > $ rbd --cluster cluster2 snap ls --all mirror/image1
> > > SNAPID NAME
> > > SIZE PROTECTED TIMESTAMP
> > > NAMESPACE
> > > 5 fs
> > > 1 GiB Thu Jan 21 14:50:52
> > > 2021 user
> > > 6
> > > .mirror.non_primary.f9f692b8-2405-416c-9247-5628e303947a.0a13b822-0508-47d6-a460-a8cc4e012686
> > >
> > > 1 GiB Thu Jan 21 14:50:53 2021 mirror (non-primary
> > > peer_uuids:[] 9824df2b-86c4-4264-a47e-cf968efd09e1:6 copied)
> > > $ rbd --cluster cluster2 --rbd-default-clone-format 2 clone
> > > mirror/image1@fs mirror/image2
> > > $ rbd --cluster cluster2 device map -t nbd mirror/image2
> > > /dev/nbd1
> > > $ blkid /dev/nbd1
> > > /dev/nbd1: UUID="50e0da12-1f99-4d45-b6e6-5f7a7decaeff"
> > > BLOCK_SIZE="4096" TYPE="ext4"
> > > $ mount /dev/nbd1 /mnt/
> > > $ mount | grep nbd
> > > /dev/nbd1 on /mnt type ext4 (rw,relatime,seclabel)
> > >
> > > > root@Bunkcephtest1:~# rbd clone CephTestPool1/vm-100-disk-1@TestSnapper
> > > > CephTestPool1/vm-100-disk-1-CLONE
> > > > root@Bunkcephtest1:~# rbd-nbd map CephTestPool1/vm-100-disk-1-CLONE
> > > > --id admin --keyring /etc/ceph/ceph.client.admin.keyring
> > > > /dev/nbd0
> > > > root@Bunkcephtest1:~# mount /dev/nbd0 /usr2
> > > > mount: /usr2: wrong fs type, bad option, bad superblock on /dev/nbd0,
> > > > missing codepage or helper program, or other error.
> > > >
> > > > On the primary still no issues
> > > >
> > > > root@Ccscephtest1:/etc/pve/priv# rbd clone
> > > > CephTestPool1/vm-100-disk-1@TestSnapper
> > > > CephTestPool1/vm-100-disk-1-CLONE
> > > > root@Ccscephtest1:/etc/pve/priv# rbd-nbd map
> > > > CephTestPool1/vm-100-disk-1-CLONE --id admin --keyring
> > > > /etc/ceph/ceph.client.admin.keyring
> > > > /dev/nbd0
> > > > root@Ccscephtest1:/etc/pve/priv# mount /dev/nbd0 /usr2
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > ________________________________
> > > > From: "Jason Dillaman" <jdill...@redhat.com>
> > > > To: "adamb" <ad...@medent.com>
> > > > Cc: "Eugen Block" <ebl...@nde.ag>, "ceph-users" <ceph-users@ceph.io>,
> > > > "Matt Wilder" <matt.wil...@bitmex.com>
> > > > Sent: Thursday, January 21, 2021 9:42:26 AM
> > > > Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
> > > >
> > > > On Thu, Jan 21, 2021 at 9:40 AM Adam Boyhan <ad...@medent.com> wrote:
> > > > >
> > > > > After the resync finished. I can mount it now.
> > > > >
> > > > > root@Bunkcephtest1:~# rbd clone
> > > > > CephTestPool1/vm-100-disk-0@TestSnapper1
> > > > > CephTestPool1/vm-100-disk-0-CLONE
> > > > > root@Bunkcephtest1:~# rbd-nbd map CephTestPool1/vm-100-disk-0-CLONE
> > > > > --id admin --keyring /etc/ceph/ceph.client.admin.keyring
> > > > > /dev/nbd0
> > > > > root@Bunkcephtest1:~# mount /dev/nbd0 /usr2
> > > > >
> > > > > Makes me a bit nervous how it got into that position and everything
> > > > > appeared ok.
> > > >
> > > > We unfortunately need to create the snapshots that are being synced as
> > > > a first step, but perhaps there are some extra guardrails we can put
> > > > on the system to prevent premature usage if the sync status doesn't
> > > > indicate that it's complete.
> > > >
> > > > > ________________________________
> > > > > From: "Jason Dillaman" <jdill...@redhat.com>
> > > > > To: "adamb" <ad...@medent.com>
> > > > > Cc: "Eugen Block" <ebl...@nde.ag>, "ceph-users" <ceph-users@ceph.io>,
> > > > > "Matt Wilder" <matt.wil...@bitmex.com>
> > > > > Sent: Thursday, January 21, 2021 9:25:11 AM
> > > > > Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
> > > > >
> > > > > On Thu, Jan 21, 2021 at 8:34 AM Adam Boyhan <ad...@medent.com> wrote:
> > > > > >
> > > > > > When cloning the snapshot on the remote cluster I can't see my ext4
> > > > > > filesystem.
> > > > > >
> > > > > > Using the same exact snapshot on both sides. Shouldn't this be
> > > > > > consistent?
> > > > >
> > > > > Yes. Has the replication process completed ("rbd mirror image status
> > > > > CephTestPool1/vm-100-disk-0")?
> > > > >
> > > > > > Primary Site
> > > > > > root@Ccscephtest1:~# rbd snap ls --all CephTestPool1/vm-100-disk-0
> > > > > > | grep TestSnapper1
> > > > > > 10621 TestSnapper1 2 TiB Thu Jan 21 08:15:22 2021 user
> > > > > >
> > > > > > root@Ccscephtest1:~# rbd clone
> > > > > > CephTestPool1/vm-100-disk-0@TestSnapper1
> > > > > > CephTestPool1/vm-100-disk-0-CLONE
> > > > > > root@Ccscephtest1:~# rbd-nbd map CephTestPool1/vm-100-disk-0-CLONE
> > > > > > --id admin --keyring /etc/ceph/ceph.client.admin.keyring
> > > > > > /dev/nbd0
> > > > > > root@Ccscephtest1:~# mount /dev/nbd0 /usr2
> > > > > >
> > > > > > Secondary Site
> > > > > > root@Bunkcephtest1:~# rbd snap ls --all CephTestPool1/vm-100-disk-0
> > > > > > | grep TestSnapper1
> > > > > > 10430 TestSnapper1 2 TiB Thu Jan 21 08:20:08 2021 user
> > > > > >
> > > > > > root@Bunkcephtest1:~# rbd clone
> > > > > > CephTestPool1/vm-100-disk-0@TestSnapper1
> > > > > > CephTestPool1/vm-100-disk-0-CLONE
> > > > > > root@Bunkcephtest1:~# rbd-nbd map CephTestPool1/vm-100-disk-0-CLONE
> > > > > > --id admin --keyring /etc/ceph/ceph.client.admin.keyring
> > > > > > /dev/nbd0
> > > > > > root@Bunkcephtest1:~# mount /dev/nbd0 /usr2
> > > > > > mount: /usr2: wrong fs type, bad option, bad superblock on
> > > > > > /dev/nbd0, missing codepage or helper program, or other error.
> > > > > >
> > > > > >
> > > > > >
> > > > > > ________________________________
> > > > > > From: "adamb" <ad...@medent.com>
> > > > > > To: "dillaman" <dilla...@redhat.com>
> > > > > > Cc: "Eugen Block" <ebl...@nde.ag>, "ceph-users"
> > > > > > <ceph-users@ceph.io>, "Matt Wilder" <matt.wil...@bitmex.com>
> > > > > > Sent: Wednesday, January 20, 2021 3:42:46 PM
> > > > > > Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
> > > > > >
> > > > > > Awesome information. I new I had to be missing something.
> > > > > >
> > > > > > All of my clients will be far newer than mimic so I don't think
> > > > > > that will be an issue.
> > > > > >
> > > > > > Added the following to my ceph.conf on both clusters.
> > > > > >
> > > > > > rbd_default_clone_format = 2
> > > > > >
> > > > > > root@Bunkcephmon2:~# rbd clone
> > > > > > CephTestPool1/vm-100-disk-0@TestSnapper1
> > > > > > CephTestPool2/vm-100-disk-0-CLONE
> > > > > > root@Bunkcephmon2:~# rbd ls CephTestPool2
> > > > > > vm-100-disk-0-CLONE
> > > > > >
> > > > > > I am sure I will be back with more questions. Hoping to replace our
> > > > > > Nimble storage with Ceph and NVMe.
> > > > > >
> > > > > > Appreciate it!
> > > > > >
> > > > > > ________________________________
> > > > > > From: "Jason Dillaman" <jdill...@redhat.com>
> > > > > > To: "adamb" <ad...@medent.com>
> > > > > > Cc: "Eugen Block" <ebl...@nde.ag>, "ceph-users"
> > > > > > <ceph-users@ceph.io>, "Matt Wilder" <matt.wil...@bitmex.com>
> > > > > > Sent: Wednesday, January 20, 2021 3:28:39 PM
> > > > > > Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image Uses
> > > > > >
> > > > > > On Wed, Jan 20, 2021 at 3:10 PM Adam Boyhan <ad...@medent.com>
> > > > > > wrote:
> > > > > > >
> > > > > > > That's what I though as well, specially based on this.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Note
> > > > > > >
> > > > > > > You may clone a snapshot from one pool to an image in another
> > > > > > > pool. For example, you may maintain read-only images and
> > > > > > > snapshots as templates in one pool, and writeable clones in
> > > > > > > another pool.
> > > > > > >
> > > > > > > root@Bunkcephmon2:~# rbd clone
> > > > > > > CephTestPool1/vm-100-disk-0@TestSnapper1
> > > > > > > CephTestPool2/vm-100-disk-0-CLONE
> > > > > > > 2021-01-20T15:06:35.854-0500 7fb889ffb700 -1
> > > > > > > librbd::image::CloneRequest: 0x55c7cf8417f0 validate_parent:
> > > > > > > parent snapshot must be protected
> > > > > > >
> > > > > > > root@Bunkcephmon2:~# rbd snap protect
> > > > > > > CephTestPool1/vm-100-disk-0@TestSnapper1
> > > > > > > rbd: protecting snap failed: (30) Read-only file system
> > > > > >
> > > > > > You have two options: (1) protect the snapshot on the primary image
> > > > > > so
> > > > > > that the protection status replicates or (2) utilize RBD clone v2
> > > > > > which doesn't require protection but does require Mimic or later
> > > > > > clients [1].
> > > > > >
> > > > > > >
> > > > > > > From: "Eugen Block" <ebl...@nde.ag>
> > > > > > > To: "adamb" <ad...@medent.com>
> > > > > > > Cc: "ceph-users" <ceph-users@ceph.io>, "Matt Wilder"
> > > > > > > <matt.wil...@bitmex.com>
> > > > > > > Sent: Wednesday, January 20, 2021 3:00:54 PM
> > > > > > > Subject: Re: [ceph-users] Re: RBD-Mirror Snapshot Backup Image
> > > > > > > Uses
> > > > > > >
> > > > > > > But you should be able to clone the mirrored snapshot on the
> > > > > > > remote
> > > > > > > cluster even though it’s not protected, IIRC.
> > > > > > >
> > > > > > >
> > > > > > > Zitat von Adam Boyhan <ad...@medent.com>:
> > > > > > >
> > > > > > > > Two separate 4 node clusters with 10 OSD's in each node. Micron
> > > > > > > > 9300
> > > > > > > > NVMe's are the OSD drives. Heavily based on the
> > > > > > > > Micron/Supermicro
> > > > > > > > white papers.
> > > > > > > >
> > > > > > > > When I attempt to protect the snapshot on a remote image, it
> > > > > > > > errors
> > > > > > > > with read only.
> > > > > > > >
> > > > > > > > root@Bunkcephmon2:~# rbd snap protect
> > > > > > > > CephTestPool1/vm-100-disk-0@TestSnapper1
> > > > > > > > rbd: protecting snap failed: (30) Read-only file system
> > > > > > > > _______________________________________________
> > > > > > > > ceph-users mailing list -- ceph-users@ceph.io
> > > > > > > > To unsubscribe send an email to ceph-users-le...@ceph.io
> > > > > > > _______________________________________________
> > > > > > > ceph-users mailing list -- ceph-users@ceph.io
> > > > > > > To unsubscribe send an email to ceph-users-le...@ceph.io
> > > > > >
> > > > > > [1]
> > > > > > https://ceph.io/community/new-mimic-simplified-rbd-image-cloning/
> > > > > >
> > > > > > --
> > > > > > Jason
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Jason
> > > >
> > > >
> > > >
> > > > --
> > > > Jason
> > >
> > >
> > >
> > > --
> > > Jason
> > > _______________________________________________
> > > ceph-users mailing list -- ceph-users@ceph.io
> > > To unsubscribe send an email to ceph-users-le...@ceph.io
> >
> >
> >
> > --
> > Jason
>
>
>
> --
> Jason
--
Jason
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