IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 31 August 2015   (all times are UTC)

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12:46
<fiesh>
does anyone have some recommendation as to how to debug ltsp not logging in correctly, saying that ssh got no response?
12:46
is there some flag that can make logging more verbose? this message alone helps me zero :/
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16:05
<dgroos>
I've got a tftp timeout error on a recent install of 14.04.3 with ltsp-pnp. The image builds fine now, but the clients won't boot. Any ideas?
16:14
work_alkisg: I imagine this is the same issue you helped me with on the previous install. Is there some written instructions somewhere for this bug?
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16:26
<dgroos>
Alas, lunch break over, students at door. Be back in an hour!
16:58
<maldridge>
dgroos: probably an issue with tftp not actually being started
16:59
you should pgrep tftp on the server and see if you see anything there
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17:33
<dgroos>
maldridge: hi!
17:33
students just left...
17:33
So, let me try that...
17:36
maldridge: can you give me a hint as to the pgrep command? I've not done it...
17:38
<maldridge>
its like grep, but works for processes
17:39
<dgroos>
so, I did htop, filtered for a processes that had tftp in it, but none...
17:42
<maldridge>
ah, that is probably why they are timing out
17:44
I'd try to sudo service tftpd start
17:44
might be tftp, and then try again
17:44
<dgroos>
will do
17:45
sudo service tftpd start returns tftpd: unrecognized service
17:49
<maldridge>
you should install tftpd-hpa, and then edit the config file at /etc/defaults/tftpd-hpa to look like this https://github.com/utdlug/lug_config/blob/master/roles/tftp/files/tftpd-hpa
17:49
I'm sure work_alkisg knows of a better way, but that's how mine is put together
17:49
<dgroos>
maldridge: Thanks I'll give it a go!
17:53
hmmm... mine said:
17:53
TFTP_ADDRESS="[::]:69"
17:53
I'll fix now...
17:54
got it, will try again
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17:56
<dgroos>
Still open tftp open timeout...
17:56
<maldridge>
and you started the service after installing/editing the file?
17:58
<dgroos>
I do that by...? I tried sudo service tftpd start and still get the tftpd: unrecognized service...
17:59
I actually have to head to get ready for my next classes :-( will return after school is over in 2 hours 15 min!
18:00
Again, thanks maldridge for engaging!
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20:33
<dgroos>
Students leave... and I can return!
20:40
ps ax | grep tftp
20:40
oops
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20:47
<professor_>
Boa Tarde
20:47
Alguem fala portugues?
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20:54
<maldridge>
professor_: Eu não estou ciente de qualquer um que pode, desculpe.
20:54
(google translate)
20:57
<dgroos>
When I grep :69 I get: http://pastebin.ubuntu.com/12240943/ Should there be 3 lines?
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21:01
<maldridge>
eh, that'll work. I tend to disable v6 on networks that don't run it, but that's a site specific choice
21:04
<professor_>
Configurei o epoptes e o terminal não consegue carregar o modo grafico por completo
21:04
porque?
21:08
<dgroos>
OK, so that's good. Why then, when I: ps ax | grep tftp the only process I get is the grep process itself--Is that OK?
21:08
<maldridge>
run "pgrep tftp"
21:09
professor_:
21:09
Você recebe as mensagens de erro?
21:10
<dgroos>
maldridge: I run "pgrep tftp" and it returns nothing.
21:10
<maldridge>
then it is not likely that you have tftpd running
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21:11
<dgroos>
Seems like on an ltsp server, that service should always be running. Or, does it just start when it receives something from a client seeking to boot?
21:11
<maldridge>
dgroos: I've had a great deal of trouble with getting tftpd to run reliably as a standalone daemon, I'd set it up like the answer in this question: http://askubuntu.com/questions/581772/how-to-install-and-configure-a-tftp-server-on-14-04
21:12
<dgroos>
:-) I'll give it a go!
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21:31
<dgroos>
hmmm... says it will need to remove some important looking files e.g. ltsp-client and more. http://pastebin.ubuntu.com/12241118/
21:32
<maldridge>
right, you need the one for inetd
21:33
https://linuxlink.timesys.com/docs/linux_tftp
21:33
mid way down the page
21:38
<dgroos>
OK so I just install xinetd? It seems that I'd have to configure the rest of the ltsp system so that the attempt to boot will be made from a different service--the xinetd?
21:38
<maldridge>
don't install xinetd
21:38
that will remove the meta packages that it described in your gist
21:39
mid way down that guide it explains how to do it with inetd, which is different
21:39
<dgroos>
OK, I see that, I'll give that a go.
21:59
In the referenced page it says "...locate the line that looks like...). Well, the line in /etc/inetd.conf that looks the closest to that is:
21:59
9571 stream tcp nowait nobody /usr/sbin/tcpd /usr/sbin/ldminfod
21:59
<maldridge>
just add the line it wants down at the bottom of the file
22:00
<dgroos>
k
22:00
reboot needed?
22:01
<maldridge>
no, just restart inetd
22:01
dgroos: my current class is ending, I'll be afk briefly and then back at a terminal in ~15 minutes
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22:19
<dgroos>
maldridge: a teacher too? where?
22:19
<maldridge>
dgroos: student, UT Dallas
22:20
<dgroos>
Installed inetutils-inetd so I could restart inetd and that did restart. However, "pgrep tftp" still returns nothing.
22:20
<maldridge>
yeah, it won't be started until you try to boot a client
22:20
inet intercepts the connection and spins up the appropriate daemon to handle the request
22:20
<dgroos>
Ah, participant in class in that role :-)
22:21
I tried to start a client (same tftp open timeout) and then pgrep tftp and still returns a blank. I must be missing something...
22:22
What are you studying?
22:22
<maldridge>
Software Engineering
22:22
<dgroos>
cool, that's only getting more significant as time goes on.
22:23
<maldridge>
I sure hope so, but I'm more on the devops side
22:23
I'm not really sure why your clients aren't able to connect at this point
22:24
because you've basically manually run through the process that builds out the ltsp servers at UTD
22:25
just to be sure, you don't have any firewalls running that need to be reconfigured, do you?
22:26
<dgroos>
There may be some bug in the ltsp 'ecosystem' that only those who are building the system in many contexts know about.
22:27
I've installed/activated no firewall out of a normal install.
22:28
maldridge: Thanks again for your efforts and good luck on your studies. I'll be here for another hour or 2 but I'll be around--have to go and pour some agar plates...
22:29
<maldridge>
ok. I think by default ltsp serves its boot files from dnsmasq, but that kind of assumes you are running your own dhcp
22:29
unless you are doing IPAPPEND stuffs, but I steer well clear of that
22:32
<dgroos>
Have you read alkisg's install page for ltsp-pnp? It mentions both of these things... https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
22:33
<maldridge>
yeah, I read it early in the summer, but I have control of the DHCP server for my segment, so I don't use ltsp's default methods for that
22:34
I don't think this is an ubuntu issue either, at least not directly. My test cluster on campus uses 14.04.3 and I haven't seen issues with it
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22:37
<dgroos>
I wonder if it is only my implementation? I'm really tempted to go back to 12.04 but I was hoping to get beyond that noxious bug where sometimes the menu bar appeared blank.
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22:40
<maldridge>
possible, are your machines actually trying to contact the right tftp server?
22:42
<dgroos>
OK... your comment about dns and IPAPPEND and looking at alkis' page got me wondering... I'm embarrassed...
22:43
<maldridge>
forget to set some options?
22:43
<dgroos>
I re-did the section on "DNS issues", done it so many times and I thought I had, but maybe I didn't.
22:44
well, just did the section starting with, "sudo -i" and going on to sed... and, well, the clients boot!
22:44
<maldridge>
huzzah!
22:45* maldridge observes that this is the exact reason for configuration management
22:46
<dgroos>
Let me be the poster child on that ;-)
22:48
<maldridge>
glad its working now, hopefully it will stay that way
22:49
<dgroos>
I wouldn't have gotten it if you hadn't mentioned dnsmask etc and I hadn't had that page of ltsp-pnp in front of me. Thanks again for your help!!!
22:49
<maldridge>
np
22:50
<dgroos>
Have a good evening (same time zone I think, I'm here in Minneapolis).
22:50
<maldridge>
you too
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