IRC chat logs for #ltsp on irc.libera.chat (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?
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| 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?
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| 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!
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| 16:58 | <maldridge> dgroos: probably an issue with tftp not actually being started
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| 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!
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| 17:33 | students just left...
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| 17:33 | So, let me try that...
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| 17:36 | maldridge: can you give me a hint as to the pgrep command? I've not done it...
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| 17:38 | <maldridge> its like grep, but works for processes
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| 17:39 | <dgroos> so, I did htop, filtered for a processes that had tftp in it, but none...
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| 17:42 | <maldridge> ah, that is probably why they are timing out
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| 17:44 | I'd try to sudo service tftpd start
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| 17:44 | might be tftp, and then try again
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| 17:44 | <dgroos> will do
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| 17:45 | sudo service tftpd start returns tftpd: unrecognized service
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| 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
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| 17:49 | I'm sure work_alkisg knows of a better way, but that's how mine is put together
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| 17:49 | <dgroos> maldridge: Thanks I'll give it a go!
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| 17:53 | hmmm... mine said:
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| 17:53 | TFTP_ADDRESS="[::]:69"
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| 17:53 | I'll fix now...
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| 17:54 | got it, will try again
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| 17:56 | <dgroos> Still open tftp open timeout...
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| 17:56 | <maldridge> and you started the service after installing/editing the file?
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| 17:58 | <dgroos> I do that by...? I tried sudo service tftpd start and still get the tftpd: unrecognized service...
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| 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!
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| 18:00 | Again, thanks maldridge for engaging!
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| 20:33 | <dgroos> Students leave... and I can return!
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| 20:40 | ps ax | grep tftp
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| 20:40 | oops
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| 20:47 | <professor_> Boa Tarde
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| 20:47 | Alguem fala portugues?
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| 20:54 | <maldridge> professor_: Eu não estou ciente de qualquer um que pode, desculpe.
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| 20:54 | (google translate)
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| 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
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| 21:04 | <professor_> Configurei o epoptes e o terminal não consegue carregar o modo grafico por completo
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| 21:04 | porque?
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| 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?
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| 21:08 | <maldridge> run "pgrep tftp"
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| 21:09 | professor_:
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| 21:09 | Você recebe as mensagens de erro?
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| 21:10 | <dgroos> maldridge: I run "pgrep tftp" and it returns nothing.
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| 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?
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| 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
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| 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/
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| 21:32 | <maldridge> right, you need the one for inetd
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| 21:33 | https://linuxlink.timesys.com/docs/linux_tftp
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| 21:33 | mid way down the page
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| 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?
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| 21:38 | <maldridge> don't install xinetd
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| 21:38 | that will remove the meta packages that it described in your gist
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| 21:39 | mid way down that guide it explains how to do it with inetd, which is different
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| 21:39 | <dgroos> OK, I see that, I'll give that a go.
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| 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:
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| 21:59 | 9571 stream tcp nowait nobody /usr/sbin/tcpd /usr/sbin/ldminfod
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| 21:59 | <maldridge> just add the line it wants down at the bottom of the file
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| 22:00 | <dgroos> k
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| 22:00 | reboot needed?
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| 22:01 | <maldridge> no, just restart inetd
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| 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?
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| 22:19 | <maldridge> dgroos: student, UT Dallas
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| 22:20 | <dgroos> Installed inetutils-inetd so I could restart inetd and that did restart. However, "pgrep tftp" still returns nothing.
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| 22:20 | <maldridge> yeah, it won't be started until you try to boot a client
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| 22:20 | inet intercepts the connection and spins up the appropriate daemon to handle the request
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| 22:20 | <dgroos> Ah, participant in class in that role :-)
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| 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...
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| 22:22 | What are you studying?
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| 22:22 | <maldridge> Software Engineering
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| 22:22 | <dgroos> cool, that's only getting more significant as time goes on.
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| 22:23 | <maldridge> I sure hope so, but I'm more on the devops side
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| 22:23 | I'm not really sure why your clients aren't able to connect at this point
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| 22:24 | because you've basically manually run through the process that builds out the ltsp servers at UTD
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| 22:25 | just to be sure, you don't have any firewalls running that need to be reconfigured, do you?
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| 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.
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| 22:27 | I've installed/activated no firewall out of a normal install.
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| 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...
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| 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
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| 22:29 | unless you are doing IPAPPEND stuffs, but I steer well clear of that
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| 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
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| 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
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| 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?
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| 22:42 | <dgroos> OK... your comment about dns and IPAPPEND and looking at alkis' page got me wondering... I'm embarrassed...
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| 22:43 | <maldridge> forget to set some options?
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| 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.
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| 22:44 | well, just did the section starting with, "sudo -i" and going on to sed... and, well, the clients boot!
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| 22:44 | <maldridge> huzzah!
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| 22:45 | * maldridge observes that this is the exact reason for configuration management | |
| 22:46 | <dgroos> Let me be the poster child on that ;-)
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| 22:48 | <maldridge> glad its working now, hopefully it will stay that way
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| 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!!!
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| 22:49 | <maldridge> np
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| 22:50 | <dgroos> Have a good evening (same time zone I think, I'm here in Minneapolis).
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| 22:50 | <maldridge> you too
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