IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 18 July 2012 (all times are UTC)
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| 01:43 | <laurei> pnfs or dnbd for server failover running fat clients, has this been discussed?
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| 01:59 | <laurei> my idea is to run multiple ltsp servers that present a single read only dnbd/pnfs file system to the fat clients, so that not only is the load distributed but having a server fail will not be noticed by clients
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| 02:45 | <dsugar100> Anyone around for a quick question - I'm seeing an error after login on my client:
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| 02:45 | compiz[32400]: segfault at 800000038 ip 00007f56e354ef38 sp 00007fff8afc0f30 error 4 in libGL.so.1.2[7f56e3532000+5d000]
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| 04:24 | <qwebirc18138> Slam my name is M Mudasser Khan
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| 04:24 | i need some help regardining LTSP
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| 04:24 | i have ubuntu 10.04
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| 04:28 | <qwebirc18138> hello telex
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| 04:29 | hello is any body here
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| 04:41 | <qwebirc18138> hello any body here
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| 04:41 | plz tel me if any one here
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| 04:41 | oh hello oh hello oh hello ???????????????????????????????
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| 04:41 | looking some help about ltsp
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| 07:22 | <laurei> alkisg i got pretty deep into btrfs, sounds great
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| 07:25 | <alkisg> laurei: cool, did you do anything fancy with it?
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| 07:27 | <laurei> heh no just admired it :)
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| 07:28 | i wanted to run another crazy idea by you from 0143 in the log
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| 07:29 | <alkisg> Server failover? What about the ssh connection?
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| 07:36 | <laurei> i have a crude failover at the moment with two ltsp servers and have set up isc dhcp failovers, its working great, with ldap and nfs homes, if a server crashes then the client might have to reboot but at least will always get to reconnect to the second server
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| 07:37 | tested works great
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| 07:37 | ssh connection?
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| 07:37 | <alkisg> LTSP uses it for authentication, but you say you're using LDAP, so nm there
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| 07:38 | Ah, unless you're only using LDAP for the server...
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| 07:38 | and not for the chroot
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| 07:38 | <laurei> ldap is for everything
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| 07:39 | <alkisg> So you're NOT using ldm?
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| 07:39 | <laurei> im just thinking that the only thing that stands in the way of seamless failover is having the nbd image (or nfs) served by some kind of redundant file system, or is there something im missing?
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| 07:39 | I'm using fat clients so I'm assume ldm isnt needed here
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| 07:40 | <alkisg> LTSP fat clients use ldm by default
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| 07:40 | Unless you're using some custom fat client implementation of your own
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| 07:40 | <laurei> yeah its stock
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| 07:40 | <alkisg> SSH then
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| 07:40 | Not LDAP
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| 07:40 | <laurei> so ssh is standing in the way then?
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| 07:41 | <alkisg> I'm not sure what happens when the ssh login connection dies on fat clients
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| 07:41 | <laurei> so ssh is connecting to ldap via the server?
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| 07:42 | <alkisg> Client ldm => uses ssh connection to the server to authenticate
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| 07:42 | Server => uses ldap to authenticate the user
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| 07:42 | Why don't you invest in some kind of VM teleporting?
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| 07:42 | <laurei> that does make sense. so if i have ldap in the chroot then ssh isn't needed at all?
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| 07:43 | <alkisg> You'd need another DM for LDAP in the chroot, as LDM doesn't support it
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| 07:45 | <laurei> ahh ok supposing i have nfs_home enabled then ssh is really only for auth?
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| 07:45 | <alkisg> Yes, and for ltsp_remoteapps etc
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| 07:45 | (for fat clients, while for thin everything goes through the ssh connection)
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| 07:48 | <laurei> i think fat clients will be more popular in the future, would you agree / disagree?
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| 07:50 | <alkisg> I think so too, but it's just a personal opinion, not a ...developer one :)
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| 07:52 | <laurei> haha cool thin clients to me are like the equivelant of 8 track players
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| 07:52 | i do have my servers based in vms but not sure if teleporting is the way to go, ive seen them move really slowly, and haven't seen that used in a failover situation in any type of automated fashion
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| 09:46 | <hace> currently setting ltsp cluster with windows 2008 as application server
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| 09:46 | anyone know what license i need for client?
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| 11:15 | <qwebirc84234> slam
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| 11:16 | any one here and i m looking some ltsp
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| 11:16 | any one here
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| 11:30 | <Hyperbyte> Sure. What do you need help with qwebirc84234? #fail
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| 11:32 | <knipwim> take it easy Hyperbyte :)
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| 11:33 | * ogra_ likes if users are so patient, saves a lot of support work :) | |
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| 11:54 | <Hyperbyte> knipwim, oh, I'm taking it very easy. :)
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| 12:14 | <[GuS]> Hi guys!
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| 12:15 | i have a doub, can i specify a xorg file configuration for a workstation like used in ltsp4? (i am on Gentoo). Also, if the case, wheres the file has to be? (path)
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| 12:17 | <alkisg> !lts.conf
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| 12:17 | <ltsp> alkisg: lts.conf: http://manpages.ubuntu.com/lts.conf
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| 12:17 | <alkisg> Read about X_CONF there
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| 12:17 | But in most cases it's *not* necessary, you can use X_* lts.conf options instead
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| 12:18 | <[GuS]> alkisg: i know, but is to fix font corruption on a intel video card.
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| 12:19 | alkisg: i can add xorg options in ltsp?
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| 12:19 | ok, let me read the link
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| 12:19 | <alkisg> Yup
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| 12:19 | What's the option you want to add?
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| 12:19 | <[GuS]> alkisg: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/820881/comments/25
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| 12:19 | Those
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| 12:20 | <alkisg> Sure, you can do that with X_OPTION* directives
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| 12:20 | <[GuS]> Ahh great, thanks alkisg. I will try
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| 12:20 | <alkisg> For i915.semaphores, you'd need pxelinux.cfg/01-mac-address
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| 12:20 | <[GuS]> alkisg: yep, i know :)
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| 12:20 | Thanks
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| 12:21 | <alkisg> "Heavy screen and font corruption when free memory is low on GMA950" ==> then it doesn't happen if you use NBD swap?
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| 12:22 | <[GuS]> I do use it, and still happens
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| 12:22 | :(
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| 12:22 | Also using latest kernel, latest xorg-drivers...
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| 12:23 | is a Intel Corporation 82945G/GZ Integrated Graphics Controller, and i have 2 workstations with this same problem/card
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| 12:24 | <alkisg> 12.04?
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| 12:25 | <[GuS]> alkisg: nope, LTSP
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| 12:25 | <alkisg> Which distro?
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| 12:25 | <[GuS]> Gentoo
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| 12:25 | <alkisg> Sorry
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| 12:25 | Gentoo, ok
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| 12:30 | <[GuS]> alkisg: the slash in example X_OPTION_02 = "\"AnotherOption\" \"True\"" are necesary?
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| 12:31 | <alkisg> It works that way, not sure if they're necessary or not
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| 12:31 | <[GuS]> ok
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| 12:35 | alkisg: great, that works. No more font corruption :)
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| 12:52 | <alkisg> Cool
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| 15:08 | <knipwim> [GuS]: you can do a ltsp-chroot --arch=i686 --mount-all to mount the portage dirs
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| 15:08 | or create a /etc/ltsp/ltsp-chroot.conf on the server with the following vars
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| 15:08 | ARCH=i686
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| 15:08 | MOUNT_ALL=true
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| 15:09 | and then ltsp-chroot will always mount everything for /opt/ltsp/i686
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| 15:09 | <[GuS]> knipwim: ok, thaks
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| 15:09 | <knipwim> also it automatically unmount everything when you exit the chroot
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| 15:09 | <[GuS]> thanks*
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| 15:10 | nice
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| 15:25 | <knipwim> [GuS]: just out of curiosity, which ltsp-server and kicktoo are you using?
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| 15:26 | <[GuS]> ltsp 5.3.7 kicktoo 0.4.2
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| 15:27 | <knipwim> the 5.4 at least deals with that /etc/ltsp_chroot problem
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| 16:06 | <[GuS]> knipwim: nice. I will test in my vbox Gentoo test VM
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| 16:08 | <knipwim> [GuS]: and do you make a 5.3 client yet?
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| 16:08 | <[GuS]> knipwim: nope, 5.2
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| 16:08 | knipwim: i had problems with 5.3 too. I dont remember which one..
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| 16:08 | <knipwim> okay, i won't remove that one yet
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| 16:08 | <[GuS]> With 5.2, the problem was about /etc/ltsp_chroot
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| 16:09 | ok
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| 16:09 | and the X that didnt boot was cause a broken lib, which solved with revdep-rebuild
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| 16:09 | <knipwim> if you have details on the 5.3, send them to me
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| 16:09 | <[GuS]> Ok
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| 16:10 | * alkisg hasn't used PRINTER_0_DEVICE yet... but wouldn't it be much easier to have it autodetected/automatically exported, e.g. LTSP_PUBLISH_PRINTERS=True (=the default) instead? | |
| 16:11 | <knipwim> [GuS]: i can't fix any gentoo ltsp problems if i don't know
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| 16:11 | <[GuS]> knipwim: i know :)
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| 16:11 | <alkisg> Maybe even with an udev rule that matches all printers...
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| 16:12 | <[GuS]> Just figured out after fix the /etc/ltsp_chroot
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| 16:12 | <knipwim> :)
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| 16:12 | <alkisg> So that hotplugging is supported as well
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| 16:12 | <[GuS]> Cuase otherwise, i wouldnt know...
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| 16:12 | <knipwim> alkisg: i trust your judgement :)
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| 16:12 | not using printers anyway
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| 16:13 | <alkisg> knipwim: till now, I was using CUPS, I've never used jetpipe, so I'm not experienced enough to judge that, but I do think it sounds saner...
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| 16:13 | * [GuS] in my work, we use many printers in our clients, which use LTSP | |
| 16:13 | <alkisg> stgraber: ? ^
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| 16:15 | ogra_: ? ^
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| 16:15 | <ogra_> i dont know how the code changed during the rewrite
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| 16:16 | * ogra_ hasnt touched jetpipe since he created it :P | |
| 16:16 | <alkisg> ogra_: but does it sound sane to use udev to publish any connected printers with jetpipe by default?
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| 16:16 | <ogra_> i know that usblp0 always wroked ootb thogh
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| 16:16 | as long as we are sure we're a thin client, why not
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| 16:16 | <alkisg> Cool
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| 16:17 | <ogra_> i wouldnt do that on a fat client or normal desktop
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| 16:17 | <alkisg> Why not on a fat client?
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| 16:17 | <ogra_> well, probably even on a fat client but make it configurable easily
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| 16:17 | i see fat clients more like normal desktops
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| 16:18 | while thin clients are just kbd/mouse/monitor extenders for the server
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| 16:18 | <alkisg> I'm using CUPS printer sharing with fat clients, but it does require a couple of extra steps, while jetpipe doesn't,
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| 16:18 | <ogra_> right
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| 16:18 | <alkisg> ...do you think there would be any drawbacks (e.g. some printers not working) if they used jetpipe too?
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| 16:18 | We could easily disable cupsd on fat clients by default...
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| 16:18 | <ogra_> well, feel free to do as you like, i just wouldnt like it on by default on normal desktops :)
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| 16:19 | <alkisg> Of course :)
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| 16:19 | Ty for the feedback :)
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| 16:22 | <stgraber> alkisg: moving jetpipe to a udev hook sounds good (as long as there's a parameter that you need to set for that to happen)
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| 16:24 | <alkisg> stgraber: why not LTSP_PUBLISH_PRINTERS=*True* by default?
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| 16:24 | Isn't it more common to want the printers published to the ltsp server, than not?
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| 16:26 | <stgraber> I don't like the idea of someone being able to scan port 9100 of a badly configured network and trigger prints on all the printers of the network
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| 16:26 | there are also quite a few viruses for printers (modifying firmware so that they are indefinitely broken or even overheat in some cases) that I wouldn't like to work out of the box
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| 16:29 | <alkisg> stgraber: what if we were using iptables to only allow access from the server?
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| 16:30 | <stgraber> alkisg: that'd be reasonable. Would need quite some tricks to work with ltsp-cluster and people overriding LDM_SERVER, but yeah, I think I'd be fine with that
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| 16:33 | <alkisg> Cool, I think we could add all LDM_SERVERs on boot time, and upon login
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| 16:33 | I'll have a look into this
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| 17:48 | <[GuS]> knipwim: btw, what could be this error? http://img861.imageshack.us/img861/2218/ltsp1.png it appears when booting
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| 17:49 | knipwim: also i think cause of that the lts.conf is not being copied, so i have to put it under the chroot to work.
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| 18:00 | <knipwim> [GuS]: good one, i just noticed it too
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| 18:01 | i planned to look at it later though
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| 18:02 | i noticed i have it in my current install also, but the client is booting
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| 18:03 | <[GuS]> knipwim: ok
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| 18:03 | I dont know then why the lts.conf does not get copied. i've applied what the wiki says, about using curl.
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| 18:04 | And i've installed curl in the chroot
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| 18:04 | <knipwim> and it still doesn't work?
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| 18:40 | <thebwt> So I'm doing a awkward ltsp configuration, and trying to figure out where things are breaking down. We need to use 'ipxe' to manually specify a path to the pxelinux.0 file (can't use dhcp). So this part works, the kernel is loaded over apache, but after that it tries to grab pxelinux.cfg profiles over tftp, which seems to fail. Is the tftp data somehow tied to the assumed dhcp address (which we don't use)?
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| 18:41 | <thebwt> I can manually tftp into the server, but I feel like the pxelinux binary has the wrong tftp info, and I'm not sure where to change that
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| 18:42 | <alkisg> thebwt: do you need to use pxelinux? Just point ipxe to the kernel directly...
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| 18:42 | <muppis> You specify static IP?
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| 18:42 | <thebwt> muppis: nope, it's dhcp. But it has a hostname
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| 18:42 | alkisg: the kernel directly doesn't seem to work in the past.. let me try again
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| 18:42 | alkisg: thats vmlinuz right?
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| 18:43 | <alkisg> thebwt: it does work, if you need the ipxe command line for that I can look it up for you...
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| 18:43 | vmlinuz/initrd.img
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| 18:43 | <thebwt> that would be awesome!
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| 18:43 | going to try initrd and kernel directly with those
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| 18:45 | <alkisg> dhcp net0
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| 18:45 | # Put the LTSP server IP in the following line
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| 18:45 | set next-server 10.160.31.10
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| 18:45 | kernel tftp://${next-server}/ltsp/i386/vmlinuz ro initrd=initrd.img nbdroot=${next-server}:2000 nbd_proxy=false
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| 18:45 | initrd tftp://${next-server}/ltsp/i386/initrd.img
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| 18:45 | boot vmlinuz
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| 18:45 | That's for tftp, change it to http
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| 18:45 | Also put the correct command line there
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| 18:46 | And you can put the ip info too, moment...
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| 18:46 | <thebwt> wow, thanks!
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| 18:46 | <alkisg> thebwt: google translate that: http://alkisg.mysch.gr/steki/index.php?topic=1451.msg30596#msg30596
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| 18:46 | Recent ipxe versions support scripts as grub initrds
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| 18:47 | So you can put the script in a text file, if you didn't know that
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| 18:47 | <thebwt> I saw stuff about that, needed to getting ti working manually before I started to play with that
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| 18:48 | but actaully.. it may be easier to troubleshoot if I jsut write a script
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| 18:48 | thanks so much, this has been killing me for that last day
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| 18:48 | <alkisg> You're welcome
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| 18:48 | thebwt: btw, depending on your configuration, you might even not need ipxe
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| 18:49 | So if you want, you can describe your use case with more details...
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| 18:49 | <alkisg> There are things like e.g. proxydhcp that help a lot there
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| 18:50 | tftp is also used to fetch lts.conf, so it's preferred to http
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| 18:50 | <thebwt> I work at a university, dhcp is out of our department. So getting things liekt his into our network is a bunch of red tape.
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| 18:51 | So I'm trying to compensate by not needing dhcp info
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| 18:51 | that's all
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| 18:51 | <alkisg> !proxydhcp | echo thebwt:
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| 18:51 | <ltsp> thebwt: I do not know about 'proxydhcp', but I do know about these similar topics: 'proxy-dhcp'
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| 18:51 | <alkisg> !proxy-dhcp | echo thebwt:
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| 18:51 | <ltsp> thebwt: proxy-dhcp: https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
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| 18:52 | <alkisg> So you can (re)use the university dhcp without touching it
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| 18:52 | That's much saner than the ipxe way, and it works with NIC boot roms too
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| 18:52 | <thebwt> would this dhcp proxy have to act as a gateway for labs though?
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| 18:53 | <alkisg> No
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| 18:53 | It's just a local helper that tells the clients about "next-server" and "boot-filename"
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| 18:53 | <thebwt> neat...
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| 18:53 | thanks a ton
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| 18:53 | <alkisg> And you can limit the clients it answers to from dnsmasq.conf
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| 18:54 | !forget proxy-dhcp
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| 18:54 | <ltsp> alkisg: The operation succeeded.
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| 18:55 | <alkisg> !learn proxydhcp as A proxy DHCP server is defined by the PXE specification as a server which sends auxiliary boot information to clients, like the boot filename, tftp server or rootpath, but leaves the task of IP leasing to the normal DHCP server. More info: https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
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| 18:55 | <ltsp> alkisg: The operation succeeded.
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| 18:58 | <Hyperbyte> !nbdswap
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| 18:58 | <ltsp> Hyperbyte: Error: "nbdswap" is not a valid command.
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| 18:58 | <alkisg> Ouch some people edited that wiki page and put invalid info in it :(
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| 18:58 | <Hyperbyte> alkisg, time to put it on the real LTSP wiki. ;-)
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| 18:59 | <alkisg> Hyperbyte: afaik we're not putting distro-specific information to the LTSP wiki, do we?
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| 18:59 | <Hyperbyte> Not entirely sure. I don't see why we wouldn't though.
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| 18:59 | We could have a general page explaining what ProxyDHCP is at least, with some pointers to which software to use and how to configure it
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| 18:59 | <alkisg> Alex said that we want to leave the distro documentation to each distro site...
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| 19:00 | Well, then the pointer would still be that ubuntultsp wiki page, which now is invalid
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| 19:00 | <Hyperbyte> Question - with fat clients, don't I -need- nbdswap?
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| 19:01 | <alkisg> Hyperbyte: err, fats are not different than thins wrt swap
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| 19:01 | If you have enough RAM for your needs, you don't need swap, else you do
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| 19:01 | I always put 512MB nbd swap to both thin and fat clients
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| 19:02 | I think the most recent ltsp default is to enable NBD_SWAP automatically for clients with little RAM, little==different depending on if they're thin or fat
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| 19:22 | <thebwt> so during boot up, I'm getting "IP-Config: no response after `n` seconds, giving up" I think this si while it's trying to get nbd going
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| 19:28 | <thebwt> hmm seems to be general dhcp issues
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| 19:28 | woot
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| 19:29 | <[GuS]> [15:04] <knipwim> and it still doesn't work? ---> No :(
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| 19:35 | <[GuS]> knipwim: I have a question. I use xdmcp instead of ldm, since here in my work, most of the thin clients login in other server instead of the one that has ltsp installed, case does not work if i use LDM.
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| 19:35 | even when in that other server, i have installed ldminfo
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| 19:43 | <thebwt> alkisg: nbd seem to think that the line "nbdroot=${next-server}:2000 nbd_proxy=false" is "insuficient information" when I alt-f7 to look at the log, the name is set to 2000, the port and device are left blank
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| 19:43 | <alkisg> thebwt: use the command line from your /var/lib/tftpboot/ltsp/i386/pxeinux.cfg/default
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| 19:43 | That nbdroot=... was the old command line, for 10.04
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| 19:44 | <thebwt> roger
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| 19:56 | <[GuS]> Well, time to go home. Thanks all! cheers.
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| 20:28 | <jamyl> hello peoples :)
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| 21:06 | <Hyperbyte> jamyl, hi!
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| 21:08 | <dhanasekaran> Hi Guys I am unable download kernel from tftpd-hpa server
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| 21:08 | please guys help
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| 21:09 | <alkisg> !tftp
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| 21:09 | <ltsp> alkisg: tftp: Here's a page to help you troubleshoot TFTP problems in Ubuntu: https://help.ubuntu.com/community/UbuntuLTSP/Troubleshooting/TFTP
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| 21:09 | <dhanasekaran> I tried 'mode binary' then 'get /i386/pxelinux.0' Not working
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| 21:10 | <dhanasekaran> alkisg, I write TFTP_DIRECTORY="/opt/ltsp" in /etc/default/tftpd-hpa
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| 21:10 | <alkisg> Why?
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| 21:10 | Put your /etc/default/tftpd-hpa as it was
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| 21:11 | <dhanasekaran> But unable to download the kernel from server
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| 21:12 | alkisg, this my config file http://pastebin.com/L9N7enzN
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| 21:13 | alkisg, I put all files in /opt/ltsp location'
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| 21:13 | <alkisg> dhanasekaran: why?
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| 21:13 | <dhanasekaran> I try to download file to local machine show root ~ # tftp 192.168.70.25
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| 21:13 | tftp> mode binary
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| 21:13 | tftp> get netboor.tar
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| 21:13 | Transfer timed out.
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| 21:14 | <alkisg> Then you'd need to notify LTSP that your kernels are NOT in /var/lib/tftpboot/ltsp/i386 as they're supposed to be
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| 21:14 | dhanasekaran: please don't write what you're trying; try what I'm writing
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| 21:14 | Put back the defaults, don't mess up your configuration
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| 21:15 | <dhanasekaran> alkisg, netboot.tar in /opt/ltsp location
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| 21:15 | I try to download connection timed out error
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| 21:16 | <alkisg> Which distro/version are you using?
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| 21:16 | <dhanasekaran> ubuntu 12.04 64-bit
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| 21:17 | alkisg, tftp-hpa 5.2
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| 21:18 | alkisg, any configuration mistake i done it?
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| 21:18 | <alkisg> dhanasekaran: yes
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| 21:19 | You shouldn't modify your /etc/default/tftpd-hpa, put it back as it was
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| 21:19 | <dhanasekaran> alkisg, please guide me.. I am new guys try ltsp
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| 21:19 | <alkisg> Also, don't use .tar files, they cannot be used for booting
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| 21:19 | I did guide you
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| 21:19 | I told you 4 times to restore your /etc/default/tftpd-hpa as it was
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| 21:19 | <dhanasekaran> alkisg, thanks , I did it restored
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| 21:20 | <alkisg> OK, now restart the tftpd-hpa service
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| 21:20 | * alkisg heads off to bed, someone might continue with any other problems that you may still have... | |
| 21:20 | <dhanasekaran> tftpd-hpa stop/waiting
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| 21:20 | tftpd-hpa start/running
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| 21:20 | ok done it
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| 21:30 | <dhanasekaran> Guys Any one help me Transfer timed out. Tftpd-hpa
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| 21:30 | Guys Any one help me Transfer timed out. Tftpd-hpa
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| 21:30 | Guys Any one help me Transfer timed out. Tftpd-hpa
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| 21:31 | <||cw> anything in the server logs?
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| 21:34 | <dhanasekaran> ||cw, I am new guys to ltsp.. please guide me How to resolve this issue.
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| 21:35 | <||cw> if you tftp is timing out, it's not an ltsp issue, it's a server/tftp/client/networking issue
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| 21:35 | can you get any file at all from tftp?
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| 21:35 | <dhanasekaran> no
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| 21:36 | but in my client ping ing server working
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| 21:36 | server reachable in client end
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| 21:36 | <||cw> that doens't mean you don't have a network issue
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| 21:37 | <dhanasekaran> ||cw, yes
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| 21:37 | <||cw> you need an error from the server side too, syslog? debug mode?
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| 21:37 | I've never needed to debug tftp before
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| 21:37 | <dhanasekaran> how to go debug mode
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| 21:39 | <dhanasekaran> ||cw, I am using ubutnu 12.04 64-bit
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| 21:41 | <||cw> man tftpd-hpa ?
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| 21:41 | <dhanasekaran> ||cw, I read But Not working I tried 'mode binary' then 'get /i386/pxelinux.0'
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| 21:43 | <||cw> it's standard linux trouble shooting stuffs. I dont' really have time to train you. sorry.
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| 21:43 | <dhanasekaran> ||cw, thanks ...
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