IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 12 November 2018 (all times are UTC)
| 00:06 | jphein has joined IRC (jphein!b8178628@gateway/web/freenode/ip.184.23.134.40) | |
| 00:07 | <jphein> Hello! I am stuck again. =] For some reason the xfreerdp screen script is not working
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| 00:07 | <jphein> when I run the xfreerdp command from xterm on the ltsp client it works, but using the screen script it crashes
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| 00:08 | My lts.conf is: https://github.com/jphein/boxen/blob/master/lts.conf
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| 00:08 | I've created a symlink to the script to use xfreerdp-nightly like this
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| 00:09 | ln -s /usr/share/ltsp/screen.d/xfreerdp /usr/share/ltsp/screen.d/xfreerdp-nightly
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| 00:09 | ln -s /opt/freerdp-nightly/bin/xfreerdp /usr/bin/xfreerdp-nightly
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| 00:11 | SCREEN_07 = "xfreerdp-nightly /v: /u: /p: /sound /microphone /rfx /multitransport /network:auto /gfx:AVC444 /f" works
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| 00:21 | However neither the xfreerdp nor the xfreerdp-nightly screen scripts work when calling form the menu
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| 01:02 | oh! don't pass "/v:" with the RDP_SERVER variable like you use to
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| 05:25 | <namespac3> What do you guys to do build new images and test them in specific workstations before letting everyone else boot them?
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| 05:26 | My usual routine is to build the chroot with --skipimage, then ltspchroot into it and fix some stuff up, then ltsp-update-image
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| 05:27 | The problem is that automatically updates the kernels in the tftpboot and installs the new image in /opt/ltsp/images
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| 05:28 | I'd like to be able to build a new image and not have it be the default.. let me use my pxelinux.cfg to select a system my MAC address for me to test it on first
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| 05:31 | I can put the chroot elsewhere with --base, and I can use --chroot to give it a different name with ltsp-build-client and that's OK. Then I can ltsp-build-image --base /foo chrootname and i'll get /var/lib/tftpboot/chrootname/* all setup.. no harm to my /var/lib/tftpboot/amd64.. so all good
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| 05:33 | but then I have /foo/images/chrootname.img, which I have to get nbd-server to export, then I when a boot a client it still tries to TFTP the tftpboot/amd64/lts.conf instead of tftpboot/chrootname/lts.conf
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| 05:34 | any of you guys have a good process for testing new images without letting any user machines try to boot them before you're ready?
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| 06:13 | <quinox> I assign different images to MAC addresses from the TFTP
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| 06:26 | <alkisg> "which I have to get nbd-server to export" ==> ltsp-config nbd-server
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| 06:26 | " still tries to TFTP the tftpboot/amd64/lts.conf instead of tftpboot/chrootname/lts.conf" ==> nbd-root=server-ip:/opt/ltsp/newchroot in the cmdline
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| 06:58 | <namespac3> alkisg, nice. thank you
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| 06:58 | <alkisg> np
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| 07:00 | <namespac3> speaking of NBD, any idea how to add some redundancy to it? It sucks that losing the NBD connection kills all the clients.. so I can't reboot the server without freezing everyone
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| 07:01 | Considering the export is read only, there's gotta be a way to have more than 1 NBD server exporting the same image with some proxy or failover
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| 07:08 | <alkisg> namespac3: the clients only use nbd from the server? Not sshfs or nfs, no home dirs?
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| 07:17 | <namespac3> oh yeah, they do use sshfs as well for home
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| 07:17 | hmmm
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| 07:17 | that would be another problem
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| 07:25 | <alkisg> namespac3: if you're looking a system that allows you to access /home while the server is online, it's easy, it's called "local disk" :D
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| 07:26 | OK there are some network file systems that do offer redundancy, but ltsp doesn't have integrated support for any of them
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| 07:26 | s/online/offline, above
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| 07:27 | <namespac3> lol
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| 07:28 | which ones do offer redundancy?
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| 07:28 | my image is still trying to fetch amd64/lts.conf ...
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| 07:28 | is there another arg I can pass to tell it to get mychroot/lts.conf
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| 07:28 | <alkisg> For example, there's glusterfs
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| 07:29 | You can still use ltsp even with local disks
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| 07:29 | !local-boot
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| 07:29 | <ltsp> local-boot: If you want LTSP fat clients on a low-speed network, you can put i386.img on e.g. C:\Boot\LTSP\i386.img and use this command line in pxelinux.cfg: APPEND ro initrd=ltsp/i386/initrd.img init=/sbin/init-ltsp root=/dev/sda1 rootflags=ro loop=/Boot/LTSP/i386.img; IPAPPEND 3
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| 07:29 | <alkisg> This avoids the nbd issue
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| 07:29 | And, if you put an FSTAB line to mount /home locally, it's automatically used
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| 07:30 | And, you'd need a synching command via e.g. epoptes to sync the server image with the client image
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| 07:30 | On the client, what's the result of `cat /proc/cmdline` ?
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| 07:33 | <namespac3> BOOT_IMAGE=vmlinuz-4.15.0-38-generic ro initrd=initrd.img-4.15.0-38-generic init=/sbin/init-ltsp forcepae root=/dev/nbd0 nbd-root=192.168.1.1:/opt/ltsp/mychroot ltsp.break=50-rm-system-services BOOTIF=01-02-03-04-05-06
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| 07:33 | IPs and MACs change to protect the guilty :)
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| 07:33 | I'm using ltsp.break because the image builds don't work anymore and I'm tyring to figure out why
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| 07:34 | Since the 4.15.0-36 upgrade clients freeze up before boot
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| 07:34 | of X
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| 07:34 | nbd-root totally works
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| 07:37 | <alkisg> OK so you're using IPAPPEND 3 and the client doesn't do a dhcp request in the initramfs
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| 07:37 | <namespac3> hmm.. looks like 05-getltsconfigfile does this: tftp -m binary "$SERVER" -c get ${pathonly:-/ltsp/$(detect_arch)/}${LTSCONF:-"lts.conf"} $lts_conf_temp >/dev/null
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| 07:37 | <alkisg> So it doesn't get the ROOTPATH from the DHCP server
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| 07:37 | <namespac3> hmm. I'm only doing ipappend 2
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| 07:38 | <alkisg> OK then your $filename should be set at that point
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| 07:38 | So you could configure filename at the dhcp server
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| 07:39 | At that point, cat /run/net*.conf
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| 07:39 | What is the "filename" value there?
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| 07:39 | <namespac3> ah, I'm setting it my in dhcpd like so: filename "ltsp/amd64/pxelinux.0";
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| 07:40 | <alkisg> It should be ltsp/newchroot/pxelinux.0
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| 07:40 | <namespac3> yeah, lemme change that
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| 07:40 | <alkisg> Although it's still possible that a bug in that code might invalidate even that, and prefer BOOT_IMAGE path, which will be empty, and then it'll fall back to $(detect_arch) :D
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| 07:40 | <namespac3> oh shoot sorry
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| 07:41 | filename "ltsp/doraemon/pxelinux.0";
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| 07:41 | <alkisg> https://bugs.launchpad.net/ltsp/+bug/1594840
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| 07:41 | <namespac3> But I'm only setting IPAPPEND 2, whereas I should set IPAPPEND 3?
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| 07:41 | <alkisg> Nah that's not an issue
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| 07:41 | Both are valid use cases
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| 07:43 | In a normal system, we have: BOOT_IMAGE=/boot/vmlinuz-4.15.0-38-generic
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| 07:43 | So the path is there
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| 07:43 | Unfortunately, ltsp uses different pxelinux.0's for each subdir, instead of a global one at /var/lib/tftpboot/pxelinux.0, which makes the path there empty
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| 07:44 | <namespac3> yeah on my working system I don't get any path.. just the non-absolute kernel name
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| 07:45 | <alkisg> So there are maaaany possible sources to get the name, and all of them fail in some use cases, and the code needs to be reworked to take into account more cases
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| 07:46 | <namespac3> Can I just add the path to the pxelinux.cfg/<mac addr> file?
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| 07:52 | hmm.. nope
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| 07:56 | well, let me try just editing the script in the new chroot and then update iamge
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| 08:05 | <alkisg> namespac3: You can probably just pass another manual BOOT_IMAGE=/path/to/lts.conf in the cmdline
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| 08:13 | <namespac3> well let me try that, because apparanetly the init-ltsp.d/* scripts don't come from inside the chroot directory
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| 08:14 | <alkisg> They do
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| 08:21 | <namespac3> hmm.. well I edited it and rebuilt with ltsp-update-image and my edit isn't in the image
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| 08:23 | but happy days, your BOOT_IMAGE trick worked
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| 08:48 | <alkisg> namespac3: eh, maybe the client is using the wrong image too :)
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| 08:52 | <namespac3> it's working.. but I really need to put some more effort into making this better
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| 08:56 | what I would really like the solve is the crashing on shutdown
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| 09:12 | <alkisg> namespac3: crashing on shutdown? Do you have the greek schools ppa in the chroot sources.list?
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| 12:46 | <fiesh> setting LDM_PRIMTER_DEFAULT doesn't help with `lpq` or `lpr`, I still have to specify the printer with `lpq -P <printer>` btw
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| 12:51 | <alkisg> fiesh: I think that's an Ubuntu-specific cups patch? Not sure
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| 13:35 | <fiesh> hmm it's possible. Alas I couldn't find any environment variable that affects lpr. It's not that important really though
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| 15:47 | <bendles> Hola.
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| 15:48 | Need some help if anyone is willing!
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| 15:50 | In attempting to build a client, I was following a set of instructions and I had gotten to the point where I'm actually building the client. Upon entering the following 'ltsp-build-client --arch i386 --kiosk --skipimage --dist precise --chroot ltsp-vmview' I get an error.
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| 15:51 | 'E: Release signed by unknown key (key id 40976EAF437D05B5)
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| 15:51 | 'error: LTSP client installation ended abnormally'
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| 15:52 | Not sure really what my next step is to resolve this issue.
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| 15:52 | <||cw> you're using 12.04? why so old?
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| 15:52 | <bendles> I'm using 18.04
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| 15:52 | <||cw> then why --dist precise
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| 15:52 | <bendles> Ubuntu Server, anyways. . .
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| 15:53 | The instructions were from 12.04
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| 15:53 | I think
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| 15:53 | I'm no expert on linux, but attempting to learn.
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| 15:53 | <||cw> !install
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| 15:53 | <ltsp> install: http://wiki.ltsp.org/wiki/Installation/Ubuntu for Ubuntu, or http://wiki.ltsp.org/wiki/Installation for other distributions
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| 15:54 | <bendles> Follow that and do those things? Again, I can follow instructions, but am just starting to follow some of the logic.
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| 15:54 | <||cw> you don't need to specify --dist if you're biulding the same as the server, and also you'll need the greek schools PPA for 18.04
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| 15:55 | those instructions should work great on 18.04
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| 15:55 | <bendles> Awesome. Thanks for you help @ ||cw
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| 18:14 | <carbm2> I've searched through the chat logs but I'm still not finding an answer. Is it possible to authenticate to another server during LDM login? I'm needing my fat clients to also authenticate with kerberos. Right now I added a line to X01-localapps to put a symbolic link in the users home folder on the server to point to the cache file. Then a link on the client /tmp to the cache file in their home dir. This works and I can jump to the s
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| 18:15 | However, I'm really looking for kinit to be called on the client and use the users password. Is it possible to capture/reuse the password on login via LDM? Everything in the local PAM appears to be ignored. It appears its just there for if you have to unlock/authenticate again later.
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| 19:28 | <bendles> ||cw: Can I specify, somewhere, what I want the built image to be?
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| 19:29 | I'd like to be able to boot directly into VMWare View Horizon, but I'm not sure how to specify that.
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| 19:30 | <||cw> you configure that in the chroot. might look at the script that does remote desktop and base it off that.
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| 19:30 | <bendles> Thanks! You've really been helpful!
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| 19:30 | <||cw> making it boot as a view client will take some customizing
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| 19:31 | but it's not that hard once you find the bits. been a while since I dug into that though
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| 19:31 | <alkisg> carbm2: ltsp5 doesn't use pam on the clients, it authenticates by logging in via ssh to the server
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| 19:32 | <bendles> We are finally rolling out our VDI environment and I'm trying to setup a cost efficient way to PXE boot our existing desktops and have them image to this thin client.
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| 19:32 | <alkisg> So you'd need to change a few things to make it work with pam, like switch to libpam_sshauth that ltsp6 will use... or, if you can do the things you want server-side, there it's using pam...
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| 19:54 | <carbm2> bendles, thank you. I will look into the libpam_sshauth. I just need to be pointed in the right direction. Where can I read up on ltsp6 changes/goals?
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| 19:54 | <bendles555> carbm2: wasn't me that was helping you with that, sorry!
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| 19:55 | <alkisg> !ltsp6
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| 19:55 | <ltsp> ltsp6: (#1) https://bugs.launchpad.net/ltsp/?field.tag=ltsp6, or (#2) wiki.ltsp.org/wiki/Dev:LTSPPamNotes
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| 19:56 | <carbm2> alkisg, thank you!
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