One side affect of using sub volumes is that you can then only take a snap at the sub volume level, nothing further down the tree. I find you can use the same path on the auth without the sub volume unless I’m missing something in this thread. On Mon, Jan 2, 2023 at 10:21 AM Jonas Schwab < jonas.schwab@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > Thank you very much! Works like a charm, except for one thing: I gave my > clients the MDS caps 'allow rws path=<subvolume path>' to also be able > to create snapshots from the client, but `mkdir .snap/test` still returns > mkdir: cannot create directory ‘.snap/test’: Operation not permitted > > Do you have an idea what might be the issue here? > > Best regards, > Jonas > > PS: A happy new year to everyone! > > On 23.12.22 10:05, Kai Stian Olstad wrote: > > On 22.12.2022 15:47, Jonas Schwab wrote: > >> Now the question: Since I established this setup more or less through > >> trial and error, I was wondering if there is a more elegant/better > >> approach than what is outlined above? > > > > You can use namespace so you don't need separate pools. > > Unfortunately the documentation is sparse on the subject, I use it > > with subvolume like this > > > > > > # Create a subvolume > > > > ceph fs subvolume create <filesystem name> <subvolume name> > > --pool_layout <pool name> --namespace-isolated > > > > The subvolume is created with namespace fsvolume_<subvolume name> > > You can also find the name with > > > > ceph fs subvolume info <filesystem name> <subvolume name> | jq -r > > .pool_namespace > > > > > > # Create a user with access to the subvolume and the namespace > > > > ## First find the path to the subvolume > > > > ceph fs subvolume getpath <filesystem name> <subvolume name> > > > > ## Create the user > > > > ceph auth get-or-create client.<username> mon 'allow r' osd 'allow > > rw pool=<pool name> namespace=fsvolumens_<subvolume name>' > > > > > > I have found this by looking at how Openstack does it and some trial > > and error. > > > > > _______________________________________________ > 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
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