[16962] in athena10
Re: Postfix FQDN requested during installation
daemon@ATHENA.MIT.EDU (Aaron M. Ucko)
Thu Nov 7 15:41:44 2019
From: amu@alum.mit.edu (Aaron M. Ucko)
To: Anthony Valenti Grebe <agrebe@mit.edu>
CC: debathena <debathena@mit.edu>
Date: Thu, 07 Nov 2019 15:40:41 -0500
In-Reply-To: <7B090956-5CB7-4616-BE38-7AD363632C1D@mit.edu> (Anthony Valenti
Grebe's message of "Mon, 4 Nov 2019 23:59:21 -0500")
Message-ID: <udlzhh7ju7q.fsf@mit.edu>
MIME-Version: 1.0
Content-Type: text/plain
Thanks for clarifying!
The difference between kinit and renew is that kinit is a standard
Kerberos utility that only obtains raw Kerberos credentials, whereas
renew is an Athena-specific alias that additionally authenticates to AFS
(via the Athena-specific fsid -a, though standard aklog will typically
also do) and tries to refresh your Zephyr service tickets.
Speaking of Zephyr, what does "systemctl status zhm.service" report?
-- Aaron
Anthony Valenti Grebe <agrebe@mit.edu> writes:
> Dear Ben,
>
> Thank you for your detailed response, and Im sorry that it took me so long to respond on my end.
>
> Ive tried answering both yes and no to the debathena-msmtp-mta prompt (on different install attempts), and it seems like Ive run into either prompts or
> installation problems either way. But if this step isnt necessary for accessing AFS, then I guess I will just leave the FQDN as localhost.mit.edu and not
> worry about this part.
>
> Ive tried to install debathena-standard from the installer script (that I got from debathena.mit.edu/install-debathena.sh) on both my laptop (running Ubuntu
> 14) and my Chromebook (running Ubuntu 16 on top of Chrome OS; Im not exactly sure how this works other than that Ubuntu lives inside a chroot). In the past,
> I hadnt been able to access AFS on my laptop, but for some reason it seemed to work today. (I think that Ive tried to run kinit before and still been
> unable to access AFS; today I tried renew instead, so maybe that is the difference?) Given that it now seems to be working on my laptop, I would believe that
> the Chromebook is having problems just because of conflicts between Ubuntu and Chrome OS.
>
> I cant seem to get Zephyr to work on either machine (it just says Hostmaster not responding while initializing Zephyr). This seems less important than AFS
> access, though, given that Zephyr doesnt seem to be in as widespread use as in the past.
>
> The one question I have left: Is there a difference between kinit and renew, and what is the point of each? I would have naively thought that I would use
> kinit to access AFS and only use renew if I had left my computer on for a long time, but empirically it seems like renew gives me access to AFS and kinit does
> nothing discernible.
>
> Thank you,
> Anthony
>
> On Oct 28, 2019, at 12:44 AM, Benjamin Kaduk <kaduk@mit.edu> wrote:
>
> Hi Anthony,
>
> There's a few points to cover here, so let me take them separately:
>
> This FQDN you're being asked for is part of the Postfix configuration, a
> mail transfer agent; it's unlikely to affect your ability to use AFS and/or
> zephyr. (Incidentally, my recollection is that most debathena systems
> ended up with exim, not postfix, but I could be misremembering. I believe
> there's also a question in the installer about debathena-msmtp-mta, for
> which a "yes" answer would probably avoid the postfix question.)
>
> The "correct" FQDN value to use depends on where your machine is located
> and who is providing the network for it. For example, machines in the
> W20-575 athena cluster had hostnames like w20-575-3.mit.edu because IS&T
> assigned them to be that way.
>
> Could you say a bit more about what procedure you're using to run the
> installation? In particular, what "metapackage" (like debathena-login or
> debathena-login-graphical) do you pick, and are you getting the installer
> script itself from https://debathena.mit.edu/install-debathena.sh ?
>
> Thanks,
>
> Ben
>
> On Sat, Oct 26, 2019 at 12:02:24PM -0400, Anthony Valenti Grebe wrote:
>
> I'm trying to install debathena from the installer scripts online, but
> during the installation, I'm asked to specify the fully qualified domain
> name I want to use for Postfix and other programs. (The default option
> appears to be "localhost.") What should I put here?
> I've tried to run the installer several times without success (after
> installation I'm never able to access my files in the AFS system or send
> Zephyrs, even after typing renew or kinit), so presumably I'm doing
> something wrong, which might have been guessing the wrong domain name to
> use here.
> Thank you for any help you can give me here.
> Best,
> Anthony
--
Aaron M. Ucko, KB1CJC (amu at alum.mit.edu, ucko at debian.org)
http://www.mit.edu/~amu/ | http://stuff.mit.edu/cgi/finger/?amu@monk.mit.edu
