Re: Path to a cephfs subvolume

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Hi,

On 22.03.22 16:23, Robert Vasek wrote:
Hello,

I have a question about cephfs subvolume paths. The path to a subvol seems
to be in the format of <subvol group>/<subvol>/<some UUID>, e.g.:

/volumes/csi/csi-vol-59c3cb5a-a9ee-11ec-b412-0242ac110004/b2b5a0b3-e02b-4f93-a3f5-fdcef80ebbea

I'm wondering about the <some UUID> segment. Where is it coming from, why
is there this indirection? I suppose this means there can be multiple of
these UUIDs? Nowhere in "ceph fs subvolume{,group}" can I find anything to
list them (without actually traversing <subvol group>/<subvol>/*) however.

Or can you give me hints where to look for this in the code?

These kind of path elements are used in the cephfs CSI plugin for kubernetes. They are not related to cephfs itself.


Regards,

Burkhard


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