On Thu, Jan 21, 2021 at 8:34 AM Adam Boyhan <adamb@xxxxxxxxxx> 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" <adamb@xxxxxxxxxx>
> To: "dillaman" <dillaman@xxxxxxxxxx>
> Cc: "Eugen Block" <eblock@xxxxxx>, "ceph-users" <ceph-users@xxxxxxx>, "Matt Wilder" <matt.wilder@xxxxxxxxxx>
> Sent: Wednesday, January 20, 2021 3:42:46 PM
> Subject: Re: 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" <jdillama@xxxxxxxxxx>
> To: "adamb" <adamb@xxxxxxxxxx>
> Cc: "Eugen Block" <eblock@xxxxxx>, "ceph-users" <ceph-users@xxxxxxx>, "Matt Wilder" <matt.wilder@xxxxxxxxxx>
> Sent: Wednesday, January 20, 2021 3:28:39 PM
> Subject: Re: Re: RBD-Mirror Snapshot Backup Image Uses
>
> On Wed, Jan 20, 2021 at 3:10 PM Adam Boyhan <adamb@xxxxxxxxxx> 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" <eblock@xxxxxx>
> > To: "adamb" <adamb@xxxxxxxxxx>
> > Cc: "ceph-users" <ceph-users@xxxxxxx>, "Matt Wilder" <matt.wilder@xxxxxxxxxx>
> > Sent: Wednesday, January 20, 2021 3:00:54 PM
> > Subject: Re: 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 <adamb@xxxxxxxxxx>:
> >
> > > 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
> > > _______________________________________________
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> > _______________________________________________
> > ceph-users mailing list -- ceph-users@xxxxxxx
> > To unsubscribe send an email to ceph-users-leave@xxxxxxx
>
> [1] https://ceph.io/community/new-mimic-simplified-rbd-image-cloning/
>
> --
> Jason
>
--
Jason
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