[lustre-discuss] Nodemap, ssk and mutiple fileset from one client

[Hans Henrik Happe]

Thanks, for the input. WRT to one LNET per fileset, is there some
technical reason for this design?

Cheers,
Hans Henrik

On 06.01.2020 09.41, Moreno Diego (ID SIS) wrote:
>
> I’m not sure about the SSK limitations but I know for sure that you
> can have multiple filesets belonging to the same filesystem on a
> client. As you already said, you’ll basically need to have one LNET
> per fileset (o2ib0, o2ib1, o2ib2), then mount each fileset with the
> option ‘-o network=<filesets_lnet>’.
>
>  
>
> I gave a talk on our setup during last LAD (https://bit.ly/35oaPl7),
> slide 24 contains a few details on this. It’s for a routed
> configuration but we also had it working without LNET routers.
>
>  
>
> Diego
>
>  
>
>  
>
> *From: *lustre-discuss <lustre-discuss-bounces at lists.lustre.org> on
> behalf of Jeremy Filizetti <jeremy.filizetti at gmail.com>
> *Date: *Tuesday, 31 December 2019 at 04:22
> *To: *Hans Henrik Happe <happe at nbi.dk>
> *Cc: *"lustre-discuss at lists.lustre.org" <lustre-discuss at lists.lustre.org>
> *Subject: *Re: [lustre-discuss] Nodemap, ssk and mutiple fileset from
> one client
>
>  
>
> It doesn't look like this would be possible due to nodemap or SSK
> limitations.  As you pointed out, nodemap must associate a NID with a
> single nodemap.  SSK was intentionally tied to nodemap by design.  It
> does a lookup on the nodemap of a NID to verify it matches what is
> found in the server key.  I think even if you used multiple NIDs for a
> client like o2ib(ib0),o2ib1(ib0) you would still run into issues due
> to LNet, but I'm not certain on that.
>
>  
>
> Jeremy
>
>  
>
> On Mon, Dec 30, 2019 at 9:30 PM Hans Henrik Happe <happe at nbi.dk
> <mailto:happe at nbi.dk>> wrote:
>
>     Hi,
>
>     Is it possible to have one client mount multiple fileset's with
>     different ssk keys.
>
>     Basically, we would just like to hand out a key to clients that should
>     be allowed to mount a specific fileset (subdir). First, it looks like
>     the nodemap must contain the client NID for it to be able to
>     mount. The
>     key is not enough. Secondly, nodemaps are not allowed hold the same
>     NIDs, so it seems impossible to have multiple ssk protected filesets
>     mounted from one client, unless multiple NIDs are used?
>
>     Example: For nodes A and B and filesets f0 (key0) and f1 (key1).
>
>     A: Should be allowed to mount f0 (key0).
>     B: Should be allowed to mount f0 (key0) and f1 (key1).
>
>     Cheers,
>     Hans Henrik
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