IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 6 October 2020 (all times are UTC)
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| 04:41 | <mathesis> hi everyone
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| 04:43 | Success stories page removed from ltsp.org?
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| 04:52 | <alkisg> mathesis: yes, all the old ltsp.org site was removed
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| 04:52 | As we didn't want to maintain a web server anymore, so we moved the hosting to github
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| 04:52 | (which doesn't support php)
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| 04:54 | <mathesis> ok
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| 04:56 | Do you know use cases of ltsp in business environment?
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| 04:57 | <alkisg> You can find ltsp.org/stories in internet archive
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| 04:57 | And read many business stories online
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| 04:58 | E.g. this is the deleted ubuntultsp site: http://web.archive.org/web/20190802232847/https://help.ubuntu.com/community/UbuntuLTSP
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| 04:59 | You can also find the deleted stories there
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| 05:14 | <mathesis> ltsp is most used in greece!
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| 05:36 | <alkisg> mathesis: yup, so it ended up being developed in greece as well :)
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| 05:36 | Same as epoptes.org
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| 05:46 | <mathesis> alkisg: I want ltsp to start a small software agency
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| 05:46 | software with python, flask and sqlite
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| 05:46 | html & css
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| 05:47 | I think that ltsp can help me to save costs
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| 10:46 | <Fenchi> Hello. Is it possible to speed up TFTP? I find the download of the initrd.img slow.
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| 10:53 | <alkisg> Fenchi: what are you using, undionly.kpxe?
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| 10:53 | I.e. do your clients load PXE from BIOS first, and then undionly.kpxe from the LTSP server,
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| 10:53 | or do they load ipxe.lkrn locally, from a boot manager?
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| 10:58 | <Fenchi> I am using isc-dhcp-server
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| 10:59 | With this configuration :
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| 10:59 | <alkisg> When the clients boot, and ipxe loads, see if this appears: "using undionly"
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| 10:59 | <Fenchi> if exists ipxe.menu { filename "ltsp/ltsp.ipxe"; } elsif option arch = 00:00 { filename "ltsp/undionly.kpxe"; } elsif option arch = 00:07 { filename "ltsp/snponly.efi"; } elsif option arch = 00:09 { filename "ltsp/snponly.efi"; } else { filename "ltsp/unmatched-client"; }
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| 11:01 | <alkisg> Fenchi: do the clients have a hard disk?
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| 11:03 | <Fenchi> Je ne vois pas de "using undionly"
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| 11:03 | These are clients without hard disk
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| 11:04 | *I don't see a "using undionly"
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| 11:07 | <alkisg> Which tftp server are you using, dnsmasq?
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| 11:07 | Or tftpd-hpa?
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| 11:08 | <Fenchi> I am using dnsmasq
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| 11:09 | <alkisg> pleas run this: journalctl -u dnsmasq | grep /srv/tftp | tail -n 30 | nc termbin.com 9999
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| 11:09 | What is the output?
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| 11:13 | <Fenchi> oct. 06 11:12:32 srv-ltspaio-dm dnsmasq-tftp[1174]: failed sending /srv/tftp/ltsp/undionly.kpxe to 10.185.8.210oct. 06 11:12:32 srv-ltspaio-dm dnsmasq-tftp[1174]: sent /srv/tftp/ltsp/undionly.kpxe to 10.185.8.210oct. 06 11:12:34 srv-ltspaio-dm dnsmasq-tftp[1174]: sent /srv/tftp/ltsp/ltsp.ipxe to 10.185.8.210oct. 06 11:12:37 srv-ltspaio-dm
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| 11:13 | dnsmasq-tftp[1174]: sent /srv/tftp/ltsp/focal/vmlinuz to 10.185.8.210oct. 06 11:12:37 srv-ltspaio-dm dnsmasq-tftp[1174]: sent /srv/tftp/ltsp/ltsp.img to 10.185.8.210
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| 11:13 | Sorry for the layout
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| 11:15 | <alkisg> Fenchi: ok,
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| 11:15 | can you please try this?
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| 11:15 | sudo wget boot.ipxe.org/ipxe.pxe -O /srv/tftp/ltsp/undionly.kpxe
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| 11:15 | Then, reboot a client and see if it downloads the initrd faster
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| 11:22 | <Fenchi> It didn't change anything and it didn't load the undionly
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| 11:22 | <alkisg> So the client loads initrd slowly again? How many seconds to load ONLY the initrd?
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| 11:23 | Btw if you run the command I gave you, it will give me better information
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| 11:23 | journalctl -u dnsmasq | grep /srv/tftp | tail -n 30 | nc termbin.com 9999
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| 11:30 | <Fenchi> It takes about 20 seconds
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| 11:30 | *Loading initrd.img takes about 20 seconds
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| 11:34 | <alkisg> Fenchi: what is your client speed, 100mbps or gigabit?
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| 11:39 | Fenchi: in general, in gigabit with tftp the best speed is about 3.5 seconds for initrd
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| 11:39 | There are 3 methods to choose from, undionly.kpxe, ipxe.pxe, and http; and you're supposed to try them until you find the fastest one for you,
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| 11:39 | but if your client is 100mbps, then the best is around 15 seconds via tftp
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| 12:00 | <Fenchi> Alright i will try each one
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| 12:01 | <alkisg> (02:34:18 PM) alkisg: Fenchi: what is your client speed, 100mbps or gigabit?
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| 12:01 | <Fenchi> Even with the tftp command, it is slow. So that I am in gigabit
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| 12:02 | <alkisg> Do you have epoptes installed? Can you do a lan benchmark from the menus?
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| 12:06 | <Fenchi> I don't have epoptes but when I test with iperf, I have 823 Mbits / sec
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| 12:07 | <alkisg> You can use http if you want, it's documented in github discussion issues
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| 12:07 | !http
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| 12:07 | <ltspbot> I do not know about 'http', but I do know about these similar topics: 'tftp-http'
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| 12:07 | <alkisg> !tftp-http
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| 12:07 | <ltspbot> tftp-http: To replace tftp with http: https://github.com/ltsp/ltsp/issues/75#issuecomment-694732254
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| 12:09 | <Fenchi> One thing I forgot to mention. I'm doing fat client and my initrd.img file is 85MB (I installed zfs-initramfs which takes 30MB)
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| 12:09 | <alkisg> Yes that's normal, usually it's 80 mb
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| 12:09 | It gets downloaded in 3.5 seconds with tftp here
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| 12:30 | <Fenchi> I just tried the HTTP boot method. I added "http://10.185.5.201:8000/" at the start of the filename in isc-dhcp-server. And it's going super fast, the initrd.img file takes 0.8 seconds to download. It's so beautiful :-)Thank alkisg
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| 12:54 | <Aison> alkisg, no chance to make my ltsp working
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| 12:54 | there is really some problem when setting up the network on the netboot client
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| 12:55 | <Aison> so if you have some time, I come back to your offer to take short look at it via vnc
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| 13:23 | <alkisg> Fenchi: you're welcome
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| 13:25 | Aison, around?
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| 13:26 | Aison, if will help if you have a virtualbox client on the server, so that I can see the client boot process too
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| 13:28 | <Aison> the vnc access is given to a workstation with a virtualbox
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| 13:28 | would that work?
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| 13:29 | how do I make the connection again?
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| 13:29 | <alkisg> Aison, and the server?
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| 13:30 | !vnc-dide
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| 13:30 | <ltspbot> vnc-dide: To share your screen with me, run this: sudo apt-get --yes install x11vnc; x11vnc -connect srv1-dide.ioa.sch.gr - this is a reverse connection, it doesn't need port forwarding etc.
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| 13:32 | <Aison> server over ssh
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| 13:32 | <alkisg> OK
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| 13:38 | <Aison> btw: reseting the vbox is not working sometimes. no idea why. it's better to turn the machine off and then on again
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| 13:39 | <alkisg> Aison, this is a bug of vbox ipxe, it works fine if you use ipxe.iso,
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| 13:40 | how to type / in virtualbox, shift+a number?
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| 13:40 | <Aison> uhm, here I just press the / key?!?
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| 13:40 | <alkisg> we have different keyboard layout, it doesn't work
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| 13:40 | <Aison> what do you wish?
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| 13:40 | <kvaps> alkisg: Hi, I can't push to launchpad for some reason :-/
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| 13:41 | <Aison> alkisg, what layout do you wish?
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| 13:41 | <alkisg> Aison, cat run/net*.conf
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| 13:41 | Type that
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| 13:41 | kvaps: hi, I can't check for a couple of hours, will do so later
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| 13:42 | <kvaps> alkisg: not sure if it is your problem)
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| 13:42 | <Aison> this is new, that nfs server is not responding :)
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| 13:42 | <kvaps> alkisg: ah, it seems working now
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| 13:45 | <alkisg> Aison, I need to leave, I"ll be back in around an hour
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| 13:45 | We could continue then
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| 13:45 | <Aison> alkisg, ok, thx so far :D
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| 13:53 | <kvaps> alkisg: could you trigger build for ltsp-cloud please?
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| 14:29 | <alkisg> kvaps: done
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| 14:29 | Aison, checking...
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| 14:29 | <kvaps> alkisg: thanks
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| 14:35 | <Aison> alkisg, looks like continuing the boot process stops the network connection...
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| 14:35 | <alkisg> Aison, yes, maybe kodi applies its own network configuration somewhere?
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| 14:37 | <Aison> kodi is not started at this time
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| 14:37 | the systemd service kodi.service starts kodi
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| 14:44 | <Aison> if you like, you can also download the kodi.img or the original image. My uplink connection is quite fast
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| 14:47 | <alkisg> Aison, ufw was blocking networking
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| 14:47 | <Aison> wow
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| 14:47 | not required anyway
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| 14:48 | by default it is installed with ubuntu. I use it on servers, but on this netboot client it is not really necessary
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| 14:48 | <alkisg> Aison, try to login, even in vt2 if kodi doesn't autostart
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| 14:50 | I'll leave for a while, see how it goes, talk to you later
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| 14:50 | <Aison> alkisg, big thanks to you :)
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| 15:18 | <Aison> is it possible to hide the "Other options" section from the ipxe menu?
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| 15:21 | and is it possible to have a client section in ltsp.conf that matches the boot image? eg. in my case [image/kodi]
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| 15:25 | alkisg, i can not login with "root" (user root can't auth via pamltsp) nor with user "kodi" (User kodi doesn't exist)
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| 15:26 | <alkisg> !root
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| 15:26 | <ltspbot> I do not know about 'root', but I do know about these similar topics: 'ROOT_PASSWORD_HASH', 'chroot'
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| 15:26 | <alkisg> !ltsp.conf
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| 15:26 | <ltspbot> ltsp.conf: Configuration file for LTSP: https://ltsp.org/man/ltsp.conf/
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| 15:26 | <alkisg> Aison, see the examples section ^ for root
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| 15:27 | You can completely hide the menu if you want
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| 15:28 | To match the image... what's the use case, you have multiple images, and you want users to select them via a menu? Or is it "a specific image for each client"?
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| 15:29 | <Aison> i'm going to have multiple images
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| 15:29 | and I would like to set a hostname depending on the booted image
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| 15:30 | <alkisg> So the users will be able to select the image that they want from a menu?
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| 15:30 | <Aison> yes
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| 15:30 | not in all cases, there will be some "kiosk" clients where the image must be "fixed"
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| 15:31 | <alkisg> Try HOSTNAME="%{IMAGE}%{IP}"
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| 15:31 | Not sure if it'll work
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| 15:31 | <Aison> ok :-)
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| 15:31 | <alkisg> Aison, usually it's easier to just have one image, with multiple programs, and only activate the program you want while the client boots
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| 15:32 | So you'd have kiosk, chrome etc installed, and you'd select which one you want to activate on boot
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| 15:32 | *kodi, chrome etc
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| 15:32 | But of course that doesn't suit all use cases; but in many cases, it's better than multiple images
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| 15:33 | <Aison> k
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| 15:34 | <alkisg> kvaps: https://launchpadlibrarian.net/500919960/upload_2657391_log.txt
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| 15:34 | I think launchpad doesn't like git commit --amend and force push
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| 15:34 | At least the commit time needs to be updated
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| 15:42 | <kvaps> alkisg: I don't remember I did force push today🤔
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| 15:44 | any way packages are built, thank you
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| 15:47 | <alkisg> Ah, great
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| 16:19 | <Aison> alkisg, almost everything is working now ;) is it possible to have a boot logo? *not important*
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| 16:20 | and I still need to fix this stupid initramfs problem with static-routes
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| 16:22 | and %{IMAGE} in hostname is not supported. It is not evaluated by /usr/share/ltsp/client/init/45-networking.sh
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| 16:22 | but I guess it is somehow possible to add
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| 16:24 | <alkisg> Aison, about boot logo => nothing special in ltsp about it; google about "boot logo" without involving ltsp there
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| 16:25 | <Aison> I tried plymouth and it works on the original image, but not on the ltsp image. I guess it requires some kernel parameters or whatever. Not important ;)
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| 16:25 | <alkisg> Re: static routes, put POST_INIT_ADD_ROUTE="ip add route blah blah" commands in ltsp.conf
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| 16:25 | cat /proc/cmdline and make sure quiet splash is there
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| 16:26 | <Aison> alkisg, static routes: yeah, I know. But once a day initramfs should be fixed also ^^
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| 16:27 | <alkisg> Do you mean "file a bug report for initramfs-tools on debian"? Sure, that's the best way, although it might take a lot of time to get that accepted
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| 16:27 | Some time in the future they'll leave from klibc-tools and adopt dhclient; ubuntu has already made steps in that direction; but debian is slow in adopting new things
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| 16:28 | <Aison> I already took a look into the generation scripts. I guess it is not even that hard to fix and a provide a patch
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| 16:48 | alkisg, the problem of POST_INIT_ADD_ROUTE="ip ..." is, that it depends on the subnet of the client
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| 16:49 | but maybe I can match it with [10.0.*] section or such
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| 17:16 | <Aison0> do you guys have a donation account for the ltsp project? ;)
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| 17:19 | <alkisg> Aison, or you can write an "if" command that checks the subnet etc, either in a script in /usr/share/ltsp/client/init, or in an ltsp.conf [section], and then call the section,
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| 17:19 | see `man ltsp.conf` => examples on how to do that
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| 17:20 | No donation account for ltsp, it's a small project... chose some developer and donate to him directly :)
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