[17011] in athena10
Re: Postfix FQDN requested during installation
daemon@ATHENA.MIT.EDU (Anthony Grebe)
Sun Dec 1 08:56:55 2019
To: "Aaron M. Ucko" <amu@alum.mit.edu>
CC: debathena <debathena@mit.edu>
From: Anthony Grebe <agrebe@mit.edu>
Message-ID: <f67c58f6-7306-ca71-668b-95aba3d9186f@mit.edu>
Date: Sun, 1 Dec 2019 08:56:44 -0500
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Dear Aaron,
Thank you for explaining this, and I apologize that it's taken me so
long for me to respond.
When I run "systemctl status zhm.service," I get the response
"systemctl: command not found." It's not super important to fix this,
so don't worry about trying to debug if this is a complicated problem,
although if this is something straightforward I can try to implement it.
Thank you,
Anthony
On 11/7/19 3:40 PM, Aaron M. Ucko wrote:
> 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
