IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 13 July 2016 (all times are UTC)
| 00:09 | <maldridge> lazlo: ltsp does use the chroot, but the authentication is done against the server
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| 00:31 | <lazlo> maldridge, that expains one part of it. However when I log in, I can see the root FS. I can navigate from ./~ to /opt/ltsp/i386 in a terminal or graphical file managr.
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| 00:32 | Sorry for the typos. I am eating, be done in a few.
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| 00:33 | <maldridge> yes, that is what is expected, what are you wanting to setup and there may be a better way to do that
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| 00:36 | <lazlo> OK, I had been under the impression that the thin client would be confined to the chroot fs.
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| 00:37 | <maldridge> so the chroot fs is what's used to boot the machine, after that your session actually is sshfs mounted from the ltsp server
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| 00:39 | <lazlo> Good info thanks! I am doing this because I like learning. I have a little Xeon D-1520 and I wanted a more portable way to run virt-manager from my desktop or laptop. The thin client seems ideal, I just have a lot to learn about sercuing it.
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| 00:40 | ANd about Configuration.
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| 00:40 | <maldridge> lazlo: learning is a great goal, however you may with to look for other solutions, ltsp was designed for running large numbers of machines from a single powerful one, it sounds like you're wanting to do something closer to a "personal cloud"
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| 00:43 | <lazlo> Well, in a way. It's just that tunneling X via ssh (putty) is a bit clunky and I have always wanted to learn about LTSP.
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| 00:43 | I am sure there are much better ways to do it, I just know them yet.
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| 00:44 | <maldridge> fair, one of the things that ltsp uses tangentially that you may wish to look into is x2go, which is a solution for remote X desktops
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| 00:46 | <lazlo> I'm reading the wiki now.
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| 00:55 | maldridge, x2go does seem to be a nice package. I'll check it out later tonight after I make an new lv and clone my base-vm fs onto it.
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| 00:57 | Now that I now I was setting up LTSP correctly to begain with I feel a lot better about moving on to another project.
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| 00:57 | Know that I *know...
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| 00:58 | lol, too many typos
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| 01:00 | Anyway, thanks for you help and have a good night!
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| 01:00 | <maldridge> no problem, good luck with your endeavors!
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| 12:19 | <tarzeau> is anyone running an ltsp server on ubuntu 16.04? with debian i386 chroot?
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| 12:20 | what is the AOE option for in pxelinux.cfg/default ?
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| 12:51 | <julienfayad> Hello there, any way to get a log of user logins on ltsp FAT clients ?
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| 12:54 | tarzeau AOE seem to stand for ATA over ethernet
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| 12:54 | it’s a protocol to bind a remote filesystem to your local machine
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| 12:54 | by default ltsp uses NBD
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| 12:55 | <tarzeau> i see, no, i want NBD, and i figured the udpate-kernels nbd stuff is in the chroot... retrying...
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| 12:55 | <julienfayad> do you need to change this configuration ?
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| 12:55 | <tarzeau> we've got two ltsp servers running ubuntu 12.04 lts and want to migrate to 16.04
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| 12:55 | we're using get_hosts for the ldm load balancing
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| 12:55 | <julienfayad> well I’m using a 16.04 LTSP server
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| 12:55 | <tarzeau> i can't get my client to boot. with 32-bit clients?
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| 12:55 | <julienfayad> but following ltsp-pnp approach (so I have no chroot not)
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| 12:56 | <tarzeau> i can't use pnp, since our clients only run X and are 32-bit only
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| 12:56 | and since ubuntu 16.04 destroyed 32bit with pae
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| 12:56 | <julienfayad> well when you say they don’t boot you mean it stops at the pxe boot step in the bios ?
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| 12:56 | <tarzeau> no they get the kernel and initrd
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| 12:57 | and then i get: mount: mounting /dev/nbd0 on /root failed: no such file or directory
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| 12:57 | and a page full of other errors
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| 12:57 | target file system doesn't have requested /sbin/init-ltsp
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| 12:58 | but the target DOES have /sbin/init-ltsp
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| 12:58 | <julienfayad> well when I initially tried to use the chroot approach I was also facing issues (and the /dev/nbd0 error seems familiar)
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| 12:59 | I was suspecting missing drivers or packages on the chroot but I never fixed it as someone here exposed to me the pnp approach which was great for me
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| 12:59 | <tarzeau> and you're all running 64bit?
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| 12:59 | <julienfayad> when i was facing those errors I was using an ubuntu server image and installed GUI in the chroot only
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| 12:59 | yeah all 64
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| 13:00 | the oldest machine I have support 64 bits
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| 13:00 | so it’s fine with me
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| 13:00 | in your case it might not be possible
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| 13:00 | <tarzeau> i don't want to buy 100 new clients just for them to run only an x server
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| 13:00 | so i'll rather try to build an ltsp chroot using ubuntu 16.04 with self-built 32-bit kernels
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| 13:00 | it's not the age, but the design (very small, and zotac and alix machines actually)
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| 13:00 | and no active cooling
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| 13:01 | <julienfayad> makes sense, well I was in another situation so could easily get the ltsp-pnp working
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| 13:02 | so I didn’t really fixed the issues I was having with chroot
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| 13:02 | quick question, are you getting the exact same error on clients with different hardware ?
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| 13:02 | (back then I remember not all clients were showing the exact same errors)
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| 13:02 | <tarzeau> yes same problem
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| 13:04 | <julienfayad> have you enable some logs: https://help.ubuntu.com/community/UbuntuLTSP/ClientTroubleshooting
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| 13:05 | <tarzeau> it doesn't even get that far. the kernel is sent, however stops booting
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| 13:05 | so i'm building an ubuntu chroot now
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| 13:06 | oh wait, they're not supporting 32 bit anymore
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| 13:07 | <tarzeau> there are 32-bit images though, so let me just try
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| 13:07 | <julienfayad> where did you get that info from ?
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| 13:07 | <tarzeau> they don't have 32-bit kernels anymore, well not the pae ones
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| 13:24 | <tarzeau> of course it wouldn't just work...
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| 13:31 | <julienfayad> yeah it would have been too good to be true :-)
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| 14:52 | <julienfayad> Ok, something I’m not wrapping my head around
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| 14:52 | I’m in a root shell on one ltsp client
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| 14:52 | I issue the “ps ax | grep rpc” to see if this service is up and running
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| 14:52 | it return nothing
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| 14:53 | I launch it by hand: “/usr/sbin/rpc.gssd -vvv”
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| 14:53 | I ps ax again and it still won’t show
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| 14:53 | this worked quite well on the ltsp server
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| 14:53 | it is a fat client and I use ltsp-pnp
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| 14:54 | it’s as if ps is ‘broken’ on LTSP clients… ?
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| 14:59 | I think it’s a ps issue because I can see logs related to rpc.gssd in the syslog file
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| 15:21 | on another side, it seems LTPS clients don’t have the same folder structure as the server… for instance the /run/rpc/pipefs directory is missing on LTSP clients
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| 15:21 | and that is required by rpc.gssd to mount a kerberized drive
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| 15:21 | any idea what might be causing that ?
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| 17:42 | <julienfayad> ok it seems it’s an issue with rpcbind which is missing from the LTSP client
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| 17:42 | are these modules removed from LTSP clients at boot ?
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| 17:45 | <vagrantc> kernel module?
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| 17:45 | or installed package?
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| 17:55 | <julienfayad> well I’m not so sure
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| 17:56 | how could I know if rpcbind is a kernel module or part of a package ?
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| 17:57 | <vagrantc> dpkg -S rpcbind (if using a debian-derived system)
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| 17:58 | <julienfayad> that’s the output on the working station (the LTSP server): http://paste.ubuntu.com/19292525/
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| 18:00 | <vagrantc> dpkg -S rm-system-services
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| 18:00 | you may want to add KEEP_SYSTEM_SERVICES=rpcbind to lts.conf
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| 18:01 | and a handful of other services...
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| 18:01 | <julienfayad> the output of the second dpkg is: ltsp-client-core: /usr/share/ltsp/init-ltsp.d/50-rm-system-services
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| 18:02 | <vagrantc> look at that file, and you'll see a list of services that are disabled by default
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| 18:02 | or you'll at least see several lists of services that are disabled based on certain conditions
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| 18:03 | <julienfayad> if ! grep -q nfs /etc/fstab; then
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| 18:03 | rm_services="$rm_services $(allowed_services "
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| 18:03 | and there I can see rpcbind among others
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| 18:03 | all related to NFS
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| 18:04 | so basically adding an nfs mount in my /etc/fstab should make all these services available by default
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| 18:04 | <vagrantc> as i said the other day, you'll probably want to add some things to KEEP_SYSTEM_SERVICES
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| 18:04 | or that...
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| 18:04 | <julienfayad> without the need to edit the lts.conf
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| 18:04 | :-)
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| 18:04 | I’ll try that tomorrow and keep you posted but that looks like the fix to my problem
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| 18:04 | thanks vagrantc
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| 18:04 | vagrantc++
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| 21:53 | <Kamgha> So i'm at a loss of what my problem could be. I've got my server running, client loads the image fine over PXE network. When I try to login my screen will go black then kick my back out to the login page.
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| 22:47 | Anyone have an idea? I've run out of ideas. Able to ssh back into the server from the client fine in a terminal as well.
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| 22:47 | <quinox> try checking the SSH log on the server
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| 22:47 | <quinox> perhaps a diff. WM (dropdown bottom left, "session")
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| 22:48 | we sometimes have LTSP assign existing UIDs to people, which messes up access to their home folders causing like what you describe
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| 22:48 | <Kamgha> checking log on server says it received a disconnect from the IP of the client and disconnected by user
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| 22:49 | I've only got failsafe Xterm and default. would I need to install a new WM?
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| 22:49 | <quinox> failsafe xterm should be good
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| 22:49 | it uses nothing so it can't break :)
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| 22:50 | there might be some other debug option, I'm just an LTSP user
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| 22:50 | but stick around, the devs are in here and super helpful
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| 22:51 | <Kamgha> ok, thanks. Ya doesn't seem to do anything even changing session. I can use the shell with CTRL+ALT+F2 and SSH works fine for all users i try :(
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