[OpenAFS] Limiting mount point to known cells
Jeffrey E Altman
jaltman@auristor.com
Fri, 26 Aug 2022 22:13:53 -0400
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On 8/26/2022 5:13 PM, Ingo van Lil (inguin@gmx.de) wrote:
> Hello OpenAFS experts,
>
> is there any way to run an AFS client with both the -dynroot and -afsdb
> options, but still limit the /afs mount point to known cells
> (specifically: only my home cell)?
There is no explicit support for this behavior in OpenAFS but you might be
able to approximate it by
* enabling -dynroot
* disabling -afsdb
* removing the OpenAFS distributed CellServDB file
* creating a CellServDB file contain only one line for the cell and no
servers
>my.cell # My personal cell
A cell entry with no servers is an implicit request to lookup the
servers via DNS.
I do not remember if this works with -afsdb disabled but it might.
>
> Longer explanation of my problem:
>
> When I run "git status" somewhere inside the AFS hierarchy it freezes
> for a minute or two. git tries to access the directory /afs/.git, and I
> see that afsd sends multiple DNS requests to the loopback address
> 127.0.0.53. Not sure why it does that, it seems to be somehow related to
> systemd-resolved in Fedora Linux.
>
> Running without -dynroot solves the issue, but according to the manual
> it will keep my machine from booting in case my home cell can't be
> contacted. Not very attractive.
>
> Running without -afsdb solves the issue. That's what I do now, but it
> requires to manually specify the servers for my home cell in CellServDB.
> Ideally I'd like to get that info from DNS.
>
> Thanks in advance for any advice you can give!
>
> Regards,
> Ingo
>
> _______________________________________________
> OpenAFS-info mailing list
> OpenAFS-info@openafs.org
> https://lists.openafs.org/mailman/listinfo/openafs-info
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<div class="moz-cite-prefix">On 8/26/2022 5:13 PM, Ingo van Lil (<a
class="moz-txt-link-abbreviated moz-txt-link-freetext"
href="mailto:inguin@gmx.de">inguin@gmx.de</a>) wrote:<br>
</div>
<blockquote type="cite"
cite="mid:aa7229eb-69f2-3a2c-67a0-864cbc870e6f@gmx.de">Hello
OpenAFS experts, <br>
<br>
is there any way to run an AFS client with both the -dynroot and
-afsdb <br>
options, but still limit the /afs mount point to known cells <br>
(specifically: only my home cell)? <br>
</blockquote>
<p>There is no explicit support for this behavior in OpenAFS but you
might be<br>
able to approximate it by</p>
<ul>
<li>enabling -dynroot</li>
<li>disabling -afsdb</li>
<li>removing the OpenAFS distributed CellServDB file</li>
<li>creating a CellServDB file contain only one line for the cell
and no servers<br>
>my.cell # My personal cell</li>
</ul>
<p>A cell entry with no servers is an implicit request to lookup the
servers via DNS. <br>
I do not remember if this works with -afsdb disabled but it might.<br>
</p>
<blockquote type="cite"
cite="mid:aa7229eb-69f2-3a2c-67a0-864cbc870e6f@gmx.de"> <br>
Longer explanation of my problem: <br>
<br>
When I run "git status" somewhere inside the AFS hierarchy it
freezes <br>
for a minute or two. git tries to access the directory /afs/.git,
and I <br>
see that afsd sends multiple DNS requests to the loopback address
<br>
127.0.0.53. Not sure why it does that, it seems to be somehow
related to <br>
systemd-resolved in Fedora Linux. <br>
<br>
Running without -dynroot solves the issue, but according to the
manual <br>
it will keep my machine from booting in case my home cell can't be
<br>
contacted. Not very attractive. <br>
<br>
Running without -afsdb solves the issue. That's what I do now, but
it <br>
requires to manually specify the servers for my home cell in
CellServDB. <br>
Ideally I'd like to get that info from DNS. <br>
<br>
Thanks in advance for any advice you can give! <br>
<br>
Regards, <br>
Ingo <br>
<br>
_______________________________________________ <br>
OpenAFS-info mailing list <br>
<a class="moz-txt-link-abbreviated moz-txt-link-freetext"
href="mailto:OpenAFS-info@openafs.org">OpenAFS-info@openafs.org</a>
<br>
<a class="moz-txt-link-freetext"
href="https://lists.openafs.org/mailman/listinfo/openafs-info">https://lists.openafs.org/mailman/listinfo/openafs-info</a>
<br>
</blockquote>
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