IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 29 August 2015 (all times are UTC)
| 00:04 | <dgroos> Hi! Holed up in my classroom with a desperate attempt to get my ltsp-pnp setup to function. Have twice today run a fresh install of ubuntu 14.04.3 on the same PC I had it working on 12.04 last year.
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| 00:07 | <dgroos> Amazingly enough, even with a fresh install, then going to alkisg's https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp help page and carefully cutting and pasting of the commands I get all the way until...
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| 00:08 | ... ltsp-update-image --cleanup / (run as root) and it doesn't run! Each time I get this error: http://pastebin.ubuntu.com/12218688/
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| 00:08 | As you can imagine, I've done plenty of googling but to no success :-(
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| 00:10 | <dgroos> Please feel free to throw-out any ideas!
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| 00:36 | The first line of the error message linked above is: root@southsci1:~# ltsp-update-image --cleanup /mount: wrong fs type, bad option, bad superblock on overlayfs, missing codepage or helper program, or other error
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| 00:38 | <maldridge> dgroos: if I had to guess, you are missing a filesystem compatibility package of some kind
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| 00:38 | <dgroos> maldridge: Thanks for engaging!
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| 00:39 | I checked that out as per this page: http://askubuntu.com/questions/525243/why-do-i-get-wrong-fs-type-bad-option-bad-superblock-error
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| 00:40 | and tried to install some of the helper programs. That was a couple of days ago and 3 ubuntu reinstalls ago.
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| 00:41 | <maldridge> you have installed nfs-common and the error persists
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| 00:41 | <dgroos> let me check...
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| 00:42 | nope... installing now...
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| 00:43 | do I need a reboot after install? I installed and again tried: ltsp-update-image --cleanup / and get the same error message.
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| 00:43 | [!brb!]
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| 00:43 | <maldridge> shouldn't need to reboot
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| 00:45 | <maldridge> dgroos: does the file its trying to mount actually exist?
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| 00:54 | <dgroos> maldridge: um, how do I find out? Not sure which that is. All I know is that the ltsp-update-image in the ltsp-pnp system creates an image of the server for the clients to PXE-boot to.
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| 00:57 | <maldridge> so the last line of that error had a file in /tmp
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| 00:57 | did that file actually exist at that location
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| 00:59 | <dgroos> I cd to /tmp and did ls -la and there is no, tmp.* in there. That's a problem I guess...?
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| 01:00 | <maldridge> do you have a gui?
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| 01:00 | (on the server)
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| 01:00 | <dgroos> yes, I'll check via the gui...
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| 01:01 | don't see any tmp.anything in there...
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| 01:03 | <maldridge> so, lets try this
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| 01:03 | get two terminals up
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| 01:03 | (this is why you need the gui)
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| 01:04 | <dgroos> k :-)
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| 01:04 | <maldridge> in one run "watch -n 0.1 ls /tmp"
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| 01:04 | in the other, try to update the ltsp image
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| 01:04 | <dgroos> sudo?
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| 01:04 | <maldridge> no sudo on the first one
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| 01:06 | <dgroos> wow! there was a quick flash of a few lines in the watch... terminal, right where a file with the letter "t" would appear... but then it was gone, yup, tried again, got the same results.
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| 01:06 | <maldridge> huh, so it seems like it is creating the file, it just can't mount it
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| 01:08 | <dgroos> This is on a fresh install, that's what I don't get. Did a normal ubuntu install, for partitioning chose the "erase the disk then reinstall 14.04.3" option.
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| 01:10 | <maldridge> if you can wait a few, I can go remote into one of my installs and see if this is an issue with the latest ubuntu
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| 01:11 | <dgroos> Thanks!
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| 01:11 | <maldridge> doubtful, but not impossible
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| 01:11 | <dgroos> Sure... also just writing...
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| 01:11 | You know when this error first started to appear? That was 3 installs ago with me set-up server when I was trying to solve the https://bugs.launchpad.net/ltsp/+bug/1352038 problem...
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| 01:12 | it happened for the first time after I tried this fix: https://bugs.launchpad.net/ltsp/+bug/1352038/comments/3
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| 01:13 | but that can't still be affecting things since I've re-re installed since then? Could it?
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| 01:23 | <maldridge> no, a wipe would clear any artifacts from an old install
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| 01:24 | <dgroos> thought so...
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| 01:25 | is there anything about the NIC's or my network configuration or the school's configuration that could cause something like this? It's a new school year so maybe extra blocks-etc have been put into the firewall.
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| 01:26 | <maldridge> no, this is definitly a local issue on the server itself
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| 01:27 | <dgroos> OK. Could there be some issue on this particular HD? The error said something about a possible bad superblock but I figured if the computer seems to be working fine it probably isn't that... RAM?
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| 01:28 | I'm clutching at straws... That's why I thought maybe it might (however unlikely) be a prob with the new version of 14.04.3...
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| 01:31 | <maldridge> so at that point in the install, its created a temporary disk and tries to mount it in order to install the actual system to it
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| 01:31 | the error you're getting is that it can't mount the temporary disk to complete the install
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| 01:32 | <dgroos> that makes sense.
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| 01:32 | <maldridge> dunno why you'd be getting it though
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| 01:33 | hmm, I'm not able to immeadiately duplicate that issue, but it doesn't look like this particular host is using the pnp method
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| 01:34 | <dgroos> thanks for trying!
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| 01:34 | <maldridge> this is an interesting issue, lemme look at something real quick
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| 01:36 | ok, I've got a spare box spinning up and I'm going to run the install here, are you on 64 bit or 32
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| 01:36 | <dgroos> hardware is 64 and it's running a 32 as per the ltsp-pnp directions.
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| 01:37 | <maldridge> ok, I'm running 64 as that's the image I had, but shouldn't be too different; can you link your guide
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| 01:38 | <dgroos> https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
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| 01:40 | <maldridge> hmm, I don't get that error at all
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| 01:40 | I'm perplexed
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| 01:40 | <dgroos> ?!
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| 01:41 | yes...
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| 01:41 | Is it a fresh 14.04.3?
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| 01:42 | <maldridge> fresh with one or two local packages inserted in
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| 01:42 | nothing that could affect this though
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| 01:43 | <dgroos> how could this be? I've gotten it on 2 straight fresh installs, and specifically this last one I did nothing else but the ltsp-pnp page...
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| 01:43 | <maldridge> I'm going to go ahead and spin up a box from an installer instead of an image and see if this happens there
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| 01:43 | <dgroos> I'm tempted to do a 12.04 lts install...
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| 01:43 | OK thanks!
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| 01:56 | <maldridge> just to be sure, you have squashfs-tools installed, right?
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| 01:58 | <dgroos> yes
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| 02:00 | <maldridge> hmm, at this point I'm completely out of ideas
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| 02:01 | best I've got would be to ask work_alkisg, this is deeper into ltsp than I am familiar
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| 02:01 | <dgroos> maldridge: Thank you very much for trying.
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| 02:01 | it's 9 pm and I'm pretty sure the custodians are going to kick me out pretty soon anyway.
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| 02:02 | That's good advice. I can access remotely. Have a good evening!
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| 02:02 | <maldridge> you too
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| 18:42 | <dgroos> Hi — can anyone familiar with the inner workings of ltsp-pnp help me figure why I get http://paste.ubuntu.com/12224687/ when I run sudo ltsp-update-image --cleanup /
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| 18:43 | <maldridge> ah, back at it on a saturday I see
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| 18:43 | <dgroos> I get this error when following work_alkisg page, “https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp” right after a fresh install of 14.04.3. Keep getting this problem—have done 2 fresh installs yesterday!
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| 18:43 | maldridge: yup :-)
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| 18:44 | ssh’ing into server from home…
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| 18:46 | The first week of our physical science class just passed and no access to the computers! they’re just sitting there :-(
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| 18:47 | <maldridge> ah, year has already started for you then
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| 18:48 | <dgroos> true…
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| 18:49 | <maldridge> dgroos: curiosity, which install media are you using
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| 18:51 | <work_alkisg> dgroos: 14.04.3 has a newer kernel than 14.04.1, which you previously had installed, and thus a newer kernel, that's why you're having the issue
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| 18:51 | <dgroos> Well, the first first reinstall was via a flash drive, the next 2 were via a dvd I had burned from the iso. (yeah, so actually 3 fresh installs in the last 3 days.
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| 18:51 | <work_alkisg> You can either install the normal 14.04 kernel, not the hwe stack,
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| 18:52 | or download the ltsp-update-image from launchpad
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| 18:52 | But you need to download the specific revision where I had fixed the issue, because later on they reverted the fix
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| 18:52 | Don't download its latest version
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| 18:53 | <dgroos> work_alkisg: OK—this is with a fresh install I did yesterday with the 14.04.3? I made sure I put the /boot on the same partition as everything else…
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| 18:54 | <work_alkisg> It's not the /boot problem it's another one
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| 18:55 | !overlayfs
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| 18:55 | <ltsp`> overlayfs: Overlayfs was mainlined in Linux 3.18+, so this (http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/2639) LTSP commit is required, but missing from some distributions like e.g. Ubuntu 15.xx.
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| 18:55 | <dgroos> Ah! I didn’t get that far in my brain…
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| 18:55 | <work_alkisg> So you either need linux < 3.18, or that ^ patch
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| 18:56 | <dgroos> where can I get the proper patch for the fresh install I did yesterday (14.04.3)?
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| 19:00 | <work_alkisg> dgroos, you did see the patch I linked above, right? That's the one you need...
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| 19:01 | <dgroos> I went to the page and it says, “files modified:” then lists 2…
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| 19:01 | I click on one of the two (…hooks/ltsp) and… not sure what this all means, sorry.
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| 19:02 | <work_alkisg> That's the file involved: http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/view/2648/server/ltsp-update-image
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| 19:02 | Replace your ltsp-update-image with that one, it should fix both issues, the /boot (which you no longer have) and the overlayfs one
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| 19:03 | <dgroos> Cool, I can do that :-)
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| 19:03 | Thanks!!!
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| 19:03 | <work_alkisg> np, unfortunately the fix was reverted and I have to re-commit it some time in the future...
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| 19:08 | <maldridge> huh, any idea why it was reverted?
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| 19:12 | <work_alkisg> vagrantc fixed the /boot issue in a better way, but he didn't see that I solved other issues in that commit, so it was by mistake...
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| 19:18 | <dgroos> work_alkisg: I replace the ltsp-update-image, fixed permissions, ran sudo -i and then ltsp-update-image —cleanup / and get this error message:
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| 19:18 | Should I reboot the computer?
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| 19:20 | … and get this: http://paste.ubuntu.com/12224884/
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| 19:20 | <work_alkisg> dgroos, you downloaded the web page instead of the file
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| 19:20 | <dgroos> :-P
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| 19:20 | <work_alkisg> Use a browser to download it :)
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| 19:20 | <dgroos> :-)
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| 19:20 | <work_alkisg> Not wget, launchpad is a bit non intuitive there...
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| 19:26 | <dgroos> that’s looking more like it :-)
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| 19:26 | <work_alkisg> :)
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| 19:35 | <dgroos> just finished—successfully—building! Is there any way I can check if this will work remotely? I’m about to install Mate base and x2go. I could make a virtualbox setup… seems I did something like this in the distant past…
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| 19:36 | <maldridge> dgroos: depends, can you get a network connection to the PXE side of the box remotely?
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| 19:38 | <dgroos> Right, can’t do that. I’ve got a 2 NIC set up (one to WAN other to classroom LAN) but only have 1 cord plugged in at this time.
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| 19:38 | <work_alkisg> yup, virtualbox or kvm
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| 19:39 | !kvm
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| 19:39 | <ltsp`> kvm: Virtual thin client: kvm -vga-vmware -ctrl-grab -no-shutdown -net nic,model=virtio -net user,tftp=/var/lib/tftpboot,bootfile=/ltsp/i386/pxelinux.0
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| 19:39 | <dgroos> !virtualbox
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| 19:39 | <ltsp`> Error: "virtualbox" is not a valid command.
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| 19:39 | <work_alkisg> You're about to install mate *after* ltsp-update-image?
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| 19:39 | <dgroos> :-)
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| 19:39 | <work_alkisg> Why didn't you use the mate cd?
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| 19:40 | <dgroos> …and a bunch of other stuff…
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| 19:40 | Well, not sure how the different flavors work. I’m using Mate because that’s required to use x2go—doesn’t seem to work otherwise (including fallback).
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| 19:41 | <work_alkisg> I don't understand why you're "about to install mate"
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| 19:41 | <dgroos> so I should have installed with a Mate CD? Does this matter?
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| 19:41 | <work_alkisg> If you used the ubuntu-mate cd, then mate is already installed
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| 19:41 | Well, in theory multiple DEs are supported
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| 19:41 | <dgroos> No, I didn’t use the ubuntu-mate cd.
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| 19:41 | <work_alkisg> In practise, not everything goes as planned, so if someone is only using one DE, it's better to only have that one installed
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| 19:42 | flashback should be working fine with x2go, unless some minor bug came up in recent versions...
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| 19:42 | <dgroos> The only x2go that’s working w/14.04 is with Mate.
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| 19:42 | * work_alkisg isn't using 14.04 because ubuntu has introduced an issue with the keyboard layout | |
| 19:42 | <dgroos> I could only get w/Mate to work. What do you recommend?
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| 19:42 | <work_alkisg> For now, ubuntu 12.04... :)
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| 19:43 | (+flashback)
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| 19:43 | Later on I'll try to get better support for mate
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| 19:43 | * work_alkisg needs to go for now, cheers! | |
| 19:43 | <dgroos> Thanks again :-)
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| 19:43 | bye
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| 19:43 | <maldridge> 'later
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| 19:47 | <dgroos> hmmm… I’m thinking the best use of time at the moment is work on curriculum and give the boot test on Monday!
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| 19:48 | Thanks again maldridge !
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| 19:51 | <maldridge> eh, alkisg actually solved it
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| 19:51 | * maldridge files this issue away under "arcane kernel problems" | |
| 19:52 | <dgroos> Yeah, he has spent a lot of time helping out.
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| 19:53 | seems like that other bug wasn’t documented yet?
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| 19:53 | <maldridge> probably was, but not anywhere I found it
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| 19:54 | <dgroos> Yup. Well I’m feeling better—there’s hope things will work again :-)
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| 19:55 | Taking off now! Have a great weekend :maldridge
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