Hi,
can you share where that comment comes from? I can't find it in the
docs or on github. The only place I found is this Oracle guide which
is for Ceph Luminous, that is quite old:
https://docs.oracle.com/en/operating-systems/oracle-linux/ceph-storage/ceph-luminous-UsingCephStorageforOracleLinux.html
I have no idea if newer versions support subtree checking though,
we've been looking into ganesha many years ago and it didn't work for
us at that time at all. I have that on my agenda to give it another
try, but I don't find the time at the moment. Hopefully someone else
has more insights for you.
Regards,
Eugen
Zitat von Davíð Steinn Geirsson <david@xxxxxx>:
Hey all,
When I moved my file server shares to CephFS, I set each share on
its own CephFS. The reason was this comment in the nfs-ganesha
example config:
# Note that FSAL_CEPH does not support subtree checking, so there is
# no way to validate that a filehandle presented by a client is
# reachable via an exported subtree.
#
# For that reason, we just export "/" here.
Now, this is fine for low numbers of shares, but as they have grown
it feels a bit overkill to be creating two or more new pools
(metadata + data + sometimes another EC data) for each share. Tuning
the PG numbers for those pools is also kind of a pain.
I'm wondering, would using a subvolume for the share provide the
needed security isolation?
Best,
Davíð
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