IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 21 August 2015 (all times are UTC)
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| 11:06 | <dale_> Firstly, I've never used this before so forgive me
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| 11:06 | I cant seem to save groups on epoptes
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| 11:07 | Everytime I close the program any groups I have made disappear
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| 11:07 | Any pointers would be appreciated, I'm using Edubuntu 14.04 with LTSP with 4 fat clients and I want to be able to Wake On LAN
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| 16:08 | <quinox> Running with a fat client, and I can't figure out where the (gtk?) printing dialogue gets its printers from
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| 16:09 | it's doesn't seem to be from the locally running CUPS, since that one has diff. printers
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| 16:09 | nor it's the server's CUPS, again because it has diff. printers
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| 16:09 | * quinox is puzzled | |
| 16:12 | <quinox> I'm printing from inside chrome and libreoffice - my WM is awesome
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| 16:58 | <dgroos> ping work_alkisg
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| 17:08 | <quinox> no hurry
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| 17:08 | it might not even be LTSP but just general Linux weirdness - my knowledge of the whole printer setup is sorely lacking
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| 17:16 | <lauri> Hi guys
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| 17:16 | could anyone elaborate why aufs/overlayfs was introduced?
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| 17:16 | wasn't tmpfs enough?
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| 17:16 | <vsuojanen> quinox: meanwhile i could try "When users login from LDM session the init scripts check first is the cups installed in chroot and after that sets up CUPS_SERVER (default from LDM_SERVER)". i don't know if this helps clarifying. just snipp my experience
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| 17:23 | <vsuojanen> lauri: I think it's something with nbd mounts and perhaps ltspfs.
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| 17:23 | https://help.ubuntu.com/community/UbuntuLTSP/LTSPWithoutNFS
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| 17:24 | <quinox> vsuojanen: maybe, it would suggest that the locally running CUPs is important... maybe the printing dialogs are just out-of-sync or something
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| 17:27 | <vsuojanen> what desktop session do you have? perhaps someone here has usedd the same distro and session as you
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| 17:27 | <lauri> vsuojanen: both NBD and NFS use now aufs/overlayfs
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| 17:28 | vsuojanen: it's even incorrectly documented there, scripts are looking for aufs/overlayfs
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| 17:30 | "LTSP chroots require aufs/overlayfs support in kernel to work so until now we have been using Ubuntu kernels that have the required patches."
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| 17:53 | <vsuojanen> I'm not expert here but least the ltspfs mounts different type filesystems and they need to be mounted locally (local devices). I don't know if it's possible to have rw without overlayfs on top
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| 17:54 | the root image is ro image or nfs
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| 17:54 | *ro nfs
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| 17:56 | <lauri> vsuojanen: I have booted Linux over read-only NFS with some tmpfs mountpoints
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| 17:56 | and I think that's the way it used to be with LTSP on Ubuntu 12.04
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| 18:01 | <vsuojanen> you are right. I remember that this changed when I started to use 14.04. Some LTSP servers ltsp*..conf files are also sourced different from 12.04
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| 18:06 | it's getting better. it's just documentation is old.
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| 18:07 | work_alkisg is now known as alkisg | |
| 18:08 | <vsuojanen> not saying 12.04 was bad but it's good time to start looking also 14.04
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| 18:09 | <alkisg> (09:03:05 μμ) muppis: work_alkisg, but then isn't there i386 directorey created under it, so created chroot wont be in root of stick? ==> that's a feature, you can use one stick for multiple chroots :D
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| 18:17 | <alkisg> lauri: do you mean the old method of bind-mounting each file that we wanted to make writeable, from the tmpfs to the nbd/nfs?
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| 18:18 | <muppis> alkisg, but I wanted to use for just one and even boot the client from stick.
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| 18:18 | <alkisg> lauri: it's very very difficult to maintain a list of files that need to be writable in a client boot, and it changes with each distribution/version etc
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| 18:18 | muppis: then you can mv the files, it only takes 1 sec
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| 18:18 | They're in the stick, not in the disk
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| 18:20 | <muppis> That's true, but then same use rsync even it takes longer. :)
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| 18:32 | alkisg is now known as work_alkisg | |
| 18:36 | <vsuojanen> I have built client chroot directly to USB. symlink the ltsp BASE dir (/opt/ltsp) to USB and skip creating the image. I have used TFTP_DIRS="/tmp" for updating the client images
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| 18:41 | then rsync or cp the images to USB assuming you want to mount the image locally
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| 19:33 | work_alkisg is now known as alkisg | |
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| 20:06 | <alkisg> dgroos: hey
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| 20:06 | Did you want something?
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| 20:07 | <dgroos> Howdy alkisg
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| 20:07 | <alkisg> Hello
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| 20:07 | <dgroos> I do have a question--seems like the fix you did the other day might have gotten overwritten?
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| 20:07 | back to the same issue.
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| 20:08 | I did do an dist-upgrade...
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| 20:08 | <alkisg> Ah. You either need to download the same version again, or wait for an update...
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| 20:08 | <dgroos> download the same version? That sounds good.
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| 20:08 | <alkisg> dgroos: http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/2648
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| 20:08 | Browse files at that revision, locate ltsp-update-image
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| 20:08 | Put it to /usr/sbin/
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| 20:08 | <dgroos> that version works for 14.04?
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| 20:09 | <alkisg> You have 14.04.2, right?
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| 20:09 | <dgroos> And I just need to re-load every time I dist-upgrade w/new kernel?
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| 20:09 | yes
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| 20:09 | <alkisg> I'm not exactly sure when the change happened, in .1 or .2 or .3
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| 20:09 | <dgroos> I'll check...
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| 20:09 | <alkisg> It's after the 3.18 kernel I think
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| 20:10 | You don't need to reload it, no, unless you get a new ltsp version
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| 20:12 | <dgroos> ah, it's 14.04.3
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| 20:13 | <alkisg> which kernel?
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| 20:14 | Phantomas: http://www.phoronix.com/scan.php?page=article&item=bcache-fs-linux&num=1 ==> bcache *fs* ? :)
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| 20:14 | <dgroos> strange, here it's saying 14.04.1?: 3.16.0-46-generic #62~14.04.1-Ubuntu SMP Tue Aug 11 16:28:19 UTC 2015 i686 i686 i686 GNU/Linux
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| 20:15 | <alkisg> You have the -utopic instead of the -vivid kernel
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| 20:17 | sudo apt-get install --purge linux-generic-lts-vivid linux-headers-generic-lts-vivid linux-image-generic-lts-vivid
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| 20:17 | | |
| 20:17 | <dgroos> lsb_release -a and that gives: No LSB modules are available. Description: Ubuntu 14.04.3 LTS
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| 20:17 | <alkisg> ...or something like that
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| 20:17 | Yes both results are ok, you have 14.04.3 with the 14.04.1 kernel
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| 20:18 | *14.04.2, probably...
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| 20:18 | <dgroos> :-)
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| 20:18 | <alkisg> The build of the 14.04.2 kernel was done on an 14.04.1 VM :D
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| 20:18 | Nothing to worry about
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| 20:18 | <dgroos> 'k. I'll try the command and see...
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| 20:19 | * alkisg reboots to get the -vivid kernel as well... | |
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| 20:35 | <Phantomas> work_alkisg: not sure where the caching part goes in such a fs though
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| 20:36 | it seems useful only when you have >1 disks
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| 20:49 | <work_alkisg> One via the network, one local caching
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| 20:49 | 'night all :)
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| 21:30 | <dgroos> All working :-D Ready for first day of students! Thanks work_alkisg !
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| 21:44 | * maldridge is still tracing self service system issues for 1st year accounts... | |
| 21:46 | <dgroos> work_alkisg: hmmm… not working again, same boot issue. Happened after rebuilding the image (worked at that time) and a reboot of server (didn’t work after that). Ideas?
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| 21:47 | <maldridge> dgroos: something beign set in sysctl but not saved to a file?
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| 21:48 | <dgroos> I’ll check syslog?
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| 21:49 | not sure how to check.
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| 21:59 | <dgroos> work_alkisg: I googled and checked /etc/sysctl.conf and every line there was commented out.
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| 22:00 | Then checked /etc/sysctl.d/ folder and has 8 files, not sure if I should check them all? What I’m looking for?
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| 22:02 | <maldridge> dgroos: I suggested that on the off chance that you had enabled IP forwarding live and didn't commit to a file
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| 22:08 | <dgroos> work_alkisg I set up the server at the start of the summer. I didn’t do anything out of the normal as best I remember. Do I just need to put that 1 file in /usr/sbin/ upon reboot?
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