IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 9 May 2017 (all times are UTC)
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| 06:22 | <yashpal> how i will install ltsp server with fedora
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| 06:23 | <alkisg> Fedora hasn't supported LTSP for 5 years or so
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| 06:23 | So better use a deb-based distribution like Ubuntu or Debian
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| 06:55 | <ZAJDAN> alkisg: hi....this is something 'remarkably'...that LTSP is not on some "big" distro as is RedHat, CentOS...usually such distros are used in corporate area
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| 06:56 | <alkisg> ZAJDAN: redhat maintains gnome and a lot of key compontents
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| 06:56 | But there are 50.000 packages
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| 06:56 | <ZAJDAN> and where else is the better place for LTSP than corporate area
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| 06:56 | <alkisg> So, *most* of them are maintained by independed developers in whatever distro they prefer
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| 06:57 | I prefer Ubuntu, so I maintain LTSP on Ubuntu. It seems that no LTSP developer is using Fedora.
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| 06:57 | <ZAJDAN> paradox..I personaly use LTSP for 4 stations :_) but why not :_)
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| 07:23 | <Trendzetter> goodmorning LTSP
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| 07:23 | <question1000> alkisg: ok, back again ... finally online in the classroom
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| 07:24 | not toooo much time now ... but I will be back at 11h
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| 07:25 | maybe you're here then...
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| 07:28 | <Trendzetter> I am using a LTSP-pnp to show a chrome kiosk. I was suggested to use marco window manager to correct the resolution of the screen.
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| 07:29 | When I run marco from a xinit script I get a pointer on screen with correct resolution.
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| 07:30 | But if I run chrome afterwards it is not displayed. I only get a pointer no windows.
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| 07:31 | <alkisg> question1000: 11h => in which time zone? :)
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| 07:32 | Trendzetter: you need to run marco & to put it in the background
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| 07:37 | <question1000> alkisg: germany here :)
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| 07:39 | <alkisg> question1000: ok, when you can, run vnc
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| 07:39 | !vnc-edide
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| 07:39 | <ltsp> vnc-edide: To share your screen with me, open Epoptes → Help menu → Remote support → Host: srv1-dide.ioa.sch.gr, and click the Connect button
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| 07:41 | <Trendzetter> @alkisg: It works exactly as it should now! :D
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| 07:41 | <alkisg> Trendzetter: cool
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| 10:41 | <question1000> alkisg: ok. back
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| 10:41 | late, but back...
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| 10:41 | finally
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| 10:43 | alkisg: still there?
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| 11:06 | <question1000> ok, we missed.... will try it again tomorrow. bye
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| 15:33 | <SYS64738> hi
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| 15:34 | <alkisg> Hello
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| 15:38 | <SYS64738> where can i find info about disable the shutdown button of the window manager for the clients ?
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| 15:39 | I found users to input the admin when the system ask for the admin password
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| 15:39 | (admin password)
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| 15:40 | <alkisg> Which distro/version/desktop environment are you using?
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| 15:42 | <SYS64738> xfce4
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| 15:44 | ubuntu 16.04.2 / xfce4
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| 15:46 | <alkisg> You should ask at #xfce or #xubuntu, then... other desktop environments work fine
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| 15:48 | <SYS64738> ok thanks
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| 15:50 | alkisg: wich distro are you using on ltsp enviroments ?
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| 15:50 | <alkisg> Ubuntu mate
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| 16:01 | SYS64738: also have a look at using ltsp fat clients, instead of thin
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| 16:01 | !fatclients
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| 16:01 | <ltsp> fatclients: Nowadays LTSP supports thin and fat clients. They are both diskless and netbooted from the same LTSP chroot, but while thin clients run the session on the server and transfer the screen, fat clients run the session locally with their own CPU/RAM, thus performing amazingly better. See also !ltsp-pnp and https://help.ubuntu.com/community/UbuntuLTSP/FatClients
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| 16:01 | <alkisg> !ltsp-pnp
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| 16:01 | <ltsp> ltsp-pnp: ltsp-pnp is an alternative (upstream) method to maintain LTSP installations for thin and fat clients that doesn't involve chroots: https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
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| 16:01 | <alkisg> That ^ tutorial is the best way to install ltsp nowadays
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| 16:02 | <SYS64738> thanks
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| 16:02 | indeed I have fat client hw
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| 16:02 | thanks
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| 16:03 | I think the problem for fatclients is my old servers
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| 16:04 | <alkisg> SYS64738: then follow that last wiki page, it should take you only 1 hour to install the os and ltsp
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| 16:05 | For fat clients, any server with 1-2 gb ram should be fine
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| 16:05 | <SYS64738> are fat clients enviroments easier for servers than thin ?
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| 16:05 | lighter
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| 16:05 | <alkisg> A whooole lot lightter
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| 16:06 | <SYS64738> cool
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| 16:06 | thank you very much
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| 16:06 | <alkisg> np
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| 16:06 | <SYS64738> I am really interested in this
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| 16:06 | <alkisg> You can still use xfce in that case, as the shutdown button will then just work locally
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| 16:06 | <SYS64738> I am reading about the kiok mode for xfce
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| 16:06 | kiosk
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| 16:07 | <alkisg> Eh, are you following the blog of some user?
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| 16:07 | Which tutorial are you reading?
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| 16:07 | <SYS64738> however I am curious and I'll try to restart from your link above
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| 16:07 | https://wiki.xfce.org/howto/kiosk_mode
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| 16:08 | what's the meaning for ltsp-pnp?
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| 16:08 | <alkisg> Ah, some lockdown setting of xfce? other DEs have those too...
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| 16:09 | ltsp-pnp makes it easier to maintain the server as it doesn't have a chroot
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| 16:09 | Read the wiki page, it has details there
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| 16:09 | <SYS64738> ok
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| 16:09 | <alkisg> That's the recommented method nowadays
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| 16:09 | <SYS64738> the ltsp docs are very jungled
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| 16:09 | never find that page
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| 16:11 | epoptes is it a greek word ?
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| 16:11 | <alkisg> Yes
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| 16:12 | !epoptes
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| 16:12 | <ltsp> epoptes: Epoptes is a computer lab administration and monitoring tool. It works on Ubuntu and Debian based labs with LTSP or non-LTSP servers, thin and fat clients, standalone workstations, NX clients etc. More info: http://www.epoptes.org
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| 16:12 | <alkisg> Install that one too, it helps
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| 16:13 | <SYS64738> Zeus Epoptes
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| 16:13 | cool
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| 16:13 | time go now, thanks again man!
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| 16:14 | <alkisg> np
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| 17:16 | <xKill> hi everybody, I'm having some problems with ltsp on ubuntu mate 16.04. Clients run good but sometimes they hang for a while, from 20 secs to a minute, then continue working without problems. This happens randomly
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| 17:17 | i have other ltsp (older ubuntu 10.10) and this dont happens to them
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| 17:31 | <alkisg> xKill: do you see any weird messages in the output of `dmesg`?
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| 17:31 | Both on the server and the clients?
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| 17:32 | <xKill> let me check
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| 17:33 | <alkisg> For example, if on the server you see "link is down", that means network disconnected, thus the clients would hang...
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| 17:39 | <xKill> nop, nothing weird
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| 17:50 | <alkisg> put the client dmesg and syslog to pastebin
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| 17:54 | <xKill> ok
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| 18:00 | dmesg
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| 18:00 | https://pastebin.com/XGLz5j2h
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| 18:01 | syslog
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| 18:01 | https://pastebin.com/4eT9CYzr
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| 18:02 | those are from ltsp client (thin client)
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| 18:14 | <alkisg> xKill: are you using nfs?
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| 18:14 | and, ext4 on the client?
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| 18:14 | Maybe those are from the server...
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| 18:18 | localxterm | echo xKill:
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| 18:19 | !localxterm | echo xKill:
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| 18:19 | <ltsp> xKill: localxterm: Any applications that you launch on a thin client actually runs on the server, not on the client itself. If you want to open a program on the client locally, you can type 'ltsp-localapps <program>' in a run dialog or in a terminal. For example, 'ltsp-localapps xterm' to open a terminal running on the client.
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| 18:19 | <alkisg> Run dmesg on a local xterm on the client, not on the thin client session which runs on the server...
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| 18:19 | <xKill> nono
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| 18:19 | I ran dmesg locally on the client
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| 18:20 | <alkisg> [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-75-generic root=UUID=7975c69b-afef-46c3-8073-e0180a62c46c ro priority=low quiet splash
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| 18:20 | That's not a kernel command line for thin clients
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| 18:20 | <xKill> on client's tty
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| 18:20 | <alkisg> It's the server dmesg
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| 18:20 | The client command line is root=/dev/nbd0 etc
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| 18:20 | <xKill> i just went to a client pressed ctrl+alt+f1, then login
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| 18:20 | and run dmesg
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| 18:21 | that's on the client side i think
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| 18:21 | <alkisg> If you were able to login with alt+ctrl+f1, you have something really broken :)
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| 18:21 | <xKill> i've enabled it on purpose
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| 18:21 | <alkisg> How?
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| 18:21 | Thin clients don't have users so you can't login localy
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| 18:21 | (in the chroot, there are no users defined)
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| 18:21 | <xKill> i've enabled root on the client
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| 18:22 | on chroot
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| 18:22 | <alkisg> Look, if you run this: cat /proc/cmdline
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| 18:22 | Then you should see root=/dev/nbd0
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| 18:22 | If you see root=UUID=7975c69b-afef-46c3-8073-e0180a62c46c ro then it's your server
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| 18:22 | <xKill> lets see
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| 18:22 | <alkisg> Try the localxterm I said above
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| 18:23 | <xKill> i wish you can see what im seeing lol
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| 18:23 | <alkisg> That's what epoptes is for:)
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| 18:23 | But you somehow deleted the client?!
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| 18:23 | <xKill> I have a vm that's a thin client
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| 18:23 | <alkisg> !vnc-dide
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| 18:23 | <ltsp> 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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| 18:24 | <alkisg> Did the vm client ever hang for 30 secs etc?
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| 18:24 | <xKill> it boots like a normal thin client, then I go to its local tty and run commands as root (which I've enabled on chroot by setting a password)
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| 18:24 | <alkisg> Because I don't believe the VM client would have networking issues...
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| 18:24 | cat /proc/cpuinfo => see cpu. free => see ram. hostname => see pc name
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| 18:24 | <xKill> ok
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| 18:25 | <alkisg> Those should tell you if it's the client or the server :)
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| 18:25 | If the prompt says root@ltsp123, then it's locally on the client..
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| 18:25 | <xKill> 1 core xeon
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| 18:25 | mi server have 4 cores
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| 18:26 | root@PXE-TEST
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| 18:26 | that pastebins are from the client man,
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| 18:26 | <alkisg> And cat /proc/cmdline says root=UUIDxxx?
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| 18:26 | <xKill> yes
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| 18:26 | <alkisg> PXE-TEST is what, a hostname you set in lts.conf?
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| 18:26 | <xKill> nono
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| 18:26 | wait
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| 18:27 | pxe test its the name from dhcp
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| 18:27 | <alkisg> ...ok
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| 18:27 | What's the output of `cat /proc/mounts | nc termbin.com 9999`
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| 18:27 | ...on that "client" :)
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| 18:28 | <xKill> cmdline shows
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| 18:28 | BOOT_IMAGE=vmlinuz-4.4.0-38-generic ro initrd=initrd.img-4.4.0-38-generic init=/sbin/init-ltsp forcepae root=/dev/nbd0 BOOTIF=01-00-50-56-99-a9-9c
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| 18:28 | <alkisg> Aaah now we're starting to get real feedback :)
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| 18:28 | Now run dmesg | grep BOOT_IMAGE
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| 18:28 | Does it show the same root=/dev/nbd0 there?
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| 18:28 | Because in your pastebin, it didn't
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| 18:28 | Because you pasted the server dmesg :)
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| 18:29 | <xKill> [ 0.000000] Kernel command line: BOOT_IMAGE=vmlinuz-4.4.0-38-generic ro initrd=initrd.img-4.4.0-38-generic init=/sbin/init-ltsp forcepae root=/dev/nbd0 BOOTIF=01-00-50-56-99-a9-9c
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| 18:29 | <alkisg> That's what you pasted previously: [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-75-generic root=UUID=7975c69b-afef-46c3-8073-e0180a62c46c ro priority=low quiet splash
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| 18:30 | See the difference there?
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| 18:30 | <xKill> lets see
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| 18:30 | <alkisg> So the https://pastebin.com/XGLz5j2h that you pasted was the server dmesg
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| 18:30 | Now just paste the one from the client...
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| 18:30 | dmesg | nc termbin.com 9999
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| 18:31 | <xKill> just did it again
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| 18:31 | run dmesg
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| 18:31 | to a file
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| 18:31 | copy file content
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| 18:31 | to pastebin
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| 18:31 | https://pastebin.com/h5bRQXNj
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| 18:32 | http://termbin.com/wekb
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| 18:38 | <alkisg> xKill: the VM hanged for several seconds?
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| 18:40 | <alkisg> I don't see anything in the client logs, so it sounds server-side related
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| 18:40 | Does it do that with real clients too?
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| 18:44 | <xKill> that happens with real clients
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| 18:45 | couldnt replicate it with the vm
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| 18:45 | <alkisg> Right, so it sounds networking related
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| 18:45 | <xKill> the other ltps works fine
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| 18:45 | ubuntu 10.10
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| 18:46 | <alkisg> The other ltsp is on the same server?
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| 18:46 | <xKill> I have a esx enviroment so vms move from server to server frequently
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| 18:47 | no problems at all
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| 18:50 | <alkisg> Have a `ping` running on the client
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| 18:50 | And when it happens ,see if there are lost sequence numbers...
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| 18:50 | And one from the server too
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| 18:51 | <xKill> im going to try that, it happens randomly, sometimes it happens 1 time a day, sometimes more
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| 18:54 | <alkisg> Also note that if the dmesg is from the vm, which hasn't had the issue... then it doesn't help at all...
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| 18:54 | You would need a recent dmesg from a client that had the issue
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| 18:55 | (and its recent syslog too)
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| 18:55 | <xKill> ill come back tomorrow with a client dmesg and syslog from a real client.
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| 18:56 | thanks for your help man
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| 18:56 | <alkisg> np
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