IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 28 November 2012   (all times are UTC)

00:05
<vagrantc>
||cw: ltsp-pnp is not tied to NFS or NBD
00:05
||cw: debian uses NFS by default, ubuntu uses NBD by default, either can use either
00:06
er, rather
00:06
actually, er, ltsp-pnp *only* works with NBD.
00:06
since there's no chroot to export
00:09
and some things get removed in order to support ltsp-pnp
00:09
i need to update the debian wiki with the ltsp-pnp stuff
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04:42
<vicd>
Hi, All! Sorry for my english. The problem sounds like: Exported device is too big for me. On client boot.
04:42
From busybox works: nbd-client 10.0.0.4 -N quantal /dev/nbd0
04:42
and gives the same error (Exported device is too big for me): nbd-client 10.0.0.4 -N name /dev/nbd0, where 'name' - any name that do not exists in /etc/nbd-server/config
04:46
<work_alkisg>
vicd: what's the output of this command? egrep -rv '^#|^$' /etc/nbd-server/
04:46work_alkisg is now known as alkisg
04:47
<vicd>
/etc/nbd-server/config:[generic]
04:47
/etc/nbd-server/config: # The [generic] section is required, even if nothing is specified
04:47
/etc/nbd-server/config: # there.
04:47
/etc/nbd-server/config: # When either of these options are specified, nbd-server drops
04:47
/etc/nbd-server/config: # privileges to the given user and group after opening ports, but
04:47
/etc/nbd-server/config: # _before_ opening files.
04:47
/etc/nbd-server/config: user = nobody
04:47
/etc/nbd-server/config: group = nobody
04:47
/etc/nbd-server/config: oldstyle = true
04:47
/etc/nbd-server/config:[oneiric]
04:47
/etc/nbd-server/config: exportname = /srv/ltsp/oneiric.img/i386.img
04:47
/etc/nbd-server/config: port = 2001
04:47
/etc/nbd-server/config: readonly = true
04:47
/etc/nbd-server/config:[quantal]
04:48
by the way oneiric works OK
04:48
<alkisg>
quantal is empty?
04:48
<vicd>
what you meen?
04:49
<alkisg>
(06:47:44 πμ) vicd: /etc/nbd-server/config:[quantal]
04:50
That was the last line you pasted
04:50
If you don't have anything under that one, then that section is empty
04:50
<vicd>
(10:47:39) vicd: /etc/nbd-server/config: exportname = /srv/ltsp/quantal.img/i386.img
04:50
(10:47:39) vicd: /etc/nbd-server/config: port = 2003
04:50
(10:47:39) vicd: /etc/nbd-server/config: readonly = true
04:50
<alkisg>
vicd: what is your server distro/version?
04:51
<vicd>
server opensuse 12.2
04:51
<alkisg>
You are mixing named and port-based nbd exports
04:51
<vicd>
also i have config in /etc/xinit.d
04:52
<alkisg>
E.g. a quantal chroot would default to connecting to a name-based export of nbd-server, at its IANA assigned port of 10809
04:52
<vicd>
yes, mixing, and for oneiric in works
04:53
<alkisg>
In other words, you shouldn't have "oldstyle" and "port" for quantal, and nbd-server should be listening on 10809
04:53
Oneiric uses port-based exports
04:53
That's the old method
04:53
<vicd>
remove port option&
04:53
<alkisg>
nbd-client server-ip -N name ==> that means port 10809
04:53
If you want a specific port, don't specify the -N name
04:55
<vicd>
but nbd-client 10.0.0.4 -N quantal /dev/nbd0 works
04:55
do not work at startup
04:56
<alkisg>
vicd: from the client: cat /proc/cmdline
05:00
<vicd>
ro initrd=initrd.img-xxx root=/dev/nbd0 init=/sbin/init-ltsp nbdname=quantal ipv6.disable=1 BOOT_IMAGE=vmlinuz-xxx
05:01
sorry
05:01
one moment
05:02
<alkisg>
Try: nbdroot=:quantal
05:02
(in your pxelinux.cfg/default)
05:04
Basically you might want to specify the following, so that you have a standard configuration:
05:05
/etc/nbd-server/conf.d/ltsp_quantal.conf:[/opt/ltsp/quantal]
05:05
/etc/nbd-server/conf.d/ltsp_quantal.conf:exportname = /opt/ltsp/images/quantal.img
05:05
/etc/nbd-server/conf.d/ltsp_quantal.conf:readonly = true
05:05
...and in pxelinux.cfg, nbdroot=/opt/ltsp/quantal
05:06
<vicd>
with "nbdroot=:quantal" error persists, but client goes far
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05:08
<alkisg>
vicd: for :quantal, you need to change your nbd-server config too
05:08
(06:47:44 πμ) vicd: /etc/nbd-server/config:[quantal]
05:08
should become:
05:08
(06:47:44 πμ) vicd: /etc/nbd-server/config:[:quantal]
05:09
And nbd-server restarted
05:09
<vicd>
and it has x11 problem, i will try another client
05:09
<alkisg>
Ah ok
05:09
If it goes that far, you're done with the nbd problem
05:10
<vicd>
another client boots ok
05:11
big thanks for halp
05:12
help ^)
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05:30
<alkisg>
You're welcome
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06:48
<pl_>
Hi
06:49
Anybody know how the fat-client home directory mount mechanism work ?
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07:37
<Ukir1>
hai, how to use repository from DVD disc while ltsp-build-client ?
07:41
<work_alkisg>
Which distro/version/disk?
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07:44
<Ukir1>
centos 6.3, ltsp-server-5.2.17-1.el6.i686
07:45* alkisg has never used centos, no idea, sorry
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07:50
<Ukir1>
thanks, i'll use dialup internet connection anyway
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15:03
<zamba>
how can i fix the lock on the screensaver for my TCs?
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15:05
<Hyperbyte>
zamba, how did you end up with a screensaver on your thin client?
15:05
This shouldn't be happening, it is disabled by LTSP by default.
15:06
<zamba>
hm, ok
15:06
is there a way i can look into a TC session?
15:07
i'm running LTSP remotely and i need to take a look at what's happening at that location
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15:11
<zamba>
my users are describing problems and i have no way of helping them, as i can't see what they're seeing
15:17
<andygraybeal_>
zamba, i know alkisg can do this, he's done it with me.
15:18
i don't know how he does it though :)
15:18
i'm sure others can explain it here in the channel, so there is hope.
15:18
<zamba>
good, good, i'll just wait for the ultimate answer :)
15:19
<andygraybeal_>
oh i think he made an app for it....
15:19
yea, ihaven't tried it tyet
15:19
i need to though
15:19
<Hyperbyte>
zamba, ultimate answer:
15:19
!epoptes
15:19
<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
15:19
<andygraybeal_>
yay Hyperbyte :)
15:20
<Hyperbyte>
You'd need to install it though, you can't do it -right now-
15:20
For immediate access there was another trick....
15:20
<andygraybeal_>
yea, that's what he did with me
15:20
he was like.. ya this long string of gook and bam he's on my computer
15:20
i was like.. holy shit
15:21
<Hyperbyte>
Yeah, he uses reverse VNC connections
15:21
<zamba>
yeah, i've seen that
15:21
<Hyperbyte>
I think
15:21
<zamba>
i know he did the same with screen
15:22
<Hyperbyte>
So, either install epoptes so you can manage them in the future
15:22
Or use reverse VNC. :)
15:22
<zamba>
for just ssh sessions, thought
15:22
right now i'm interested in the reverse VNC thingy :)
15:22
i guess epoptes is the successor of italc?
15:22
<andygraybeal_>
yea, that's what i understand
15:22
<Hyperbyte>
zamba, yes, it is.
15:23
Wait no
15:23
Sorry
15:23
epoptes is the successor of sch-scripts or something... whatever he called it
15:23
<zamba>
yeah
15:23
<Hyperbyte>
iTalc and epoptes are not related
15:23
<zamba>
but it's more or less the same as italc
15:23
same features, i guess
15:24
<Hyperbyte>
iTalc runs on Windows, I don't think epoptes does that
15:24
epoptes was designed with LTSP in mind though, so if you're running LTSP and need a monitor tool, I guess epoptes would be your best choice.
15:25
<zamba>
well.. i'm not sure where to install the server
15:25
because i want to have a "movable" monitor station
15:25
# epoptes-client -c
15:25
connect: Connection refused
15:25
connect:errno=111
15:25
epoptes-client ERROR: Failed to fetch certificate from localhost:789
15:26
i guess i need alkisg for this
15:26
because i don't really want the server to be installed on the tc server
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17:53
<alkisg>
zamba: for flexible monitoring of ltsp clients, you may install epoptes on the ltsp server, and then use x2go to connect to the ltsp server from wherever, e.g. windows PCs over ADSL connections
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18:27
<ltspuser_28>
Hi any buddy thier
18:27
i am newbie to thin client stuff and needed some help
18:29
needed help with regard to choosing the hardware
18:29
for testing thin client
18:30
and my application is running a media player and video conference
18:30
any help
18:36
<elias_a>
ltspuser_28: What kind of video content and what kind of video conference?
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20:10
<mgariepy>
stgraber, feeling like SRUing stuff for LTSP in precise ?
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20:31
<nfh>
Hello,
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20:33
<nfh>
did anyone start a ltsp terminal client on raspberry pi?
20:36
<zamba>
alkisg: ah, ok
20:40
<knipwim>
nfh: not start yet
20:40
nfh: but working on it
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20:45
<zamba>
alkisg: i install x2go on the ltsp server?
20:45
<alkisg>
Yup
20:45
<zamba>
alkisg: but how do i set up the reverse vnc connection that everyone in here is talkinga about?
20:45
<alkisg>
zamba: you don't need that, do you?
20:45
Epoptes will do reverse connections for the clients
20:45
You'll do a forward connection to connect to your ltsp server
20:46
The reverse connection trick is useful for remote support, so that the person that needs support doesn't have to do port forward etc
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20:46
<zamba>
this is a bit of a touch and go, since i've never used either epoptes or x2go
20:46
<alkisg>
But when some sysadmin wants to access his own server, forward connections are just fine, unless he too has restrictions on port forwarding
20:46
<zamba>
x2go is not in any repos
20:47
<alkisg>
https://launchpad.net/~x2go/+archive/stable
20:48
Basic question before you start: "can you currently ssh to your server?"
20:48
If you can, then x2go+epoptes will be a piece of cake
20:48
<zamba>
yup
20:49
this is me
20:49
nothing is piece of cake for me
20:49
i have my own paragraph in murphy's law
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21:47
<Hyperbyte>
zamba, don't be so glum. :P
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22:24
<zamba>
hehe
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22:27
<zamba>
x2go doesn't work
22:28
is there something i'm missing?
22:29
trying to connect using the x2goclient
22:29
from windows
22:29
it says connecting
22:30
and i get a new black window with X2GO in the background
22:30
and it's stuck there
22:31
and then: "No response received from the remote server. Do you want to terminate the current session?"
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22:32
<[conrad]>
I'm using LTSP as outlined via https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp . I'm running into an issue, where it seems no matter what I do, the thin clients connecting to the LTSP server are not properly pulling in DNS information. Thin client users are not available to sudo commands to modify resolv files, though we wouldn't want to do that anyway. We've tried modifying lts.conf using DNS_SERVER as outlined in the link I s
22:32
upplied, as well as the dnsmasq modifications outlined in the link, and nothing seems to be working. Again, the thin clients all boot up and function properly otherwise. Any ideas?
22:35
<zamba>
"Warning: No data received from remote proxy within 30 seconds."
22:35
as i said.. murphy
22:38
<vagrantc>
[conrad]: search for issues with resolvconf
22:38
!resolvconf
22:38
<ltsp>
Error: "resolvconf" is not a valid command.
22:38
<vagrantc>
alkisg might know more
22:40
<alkisg>
[conrad]: https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp#DNS_issues
22:40
Do the "alternative way" there
22:40
Unfortunately Ubuntu chose to do a very bad implementation of local dns resolving, using dnsmasq as a library while hooking the reserved port 53
22:41
So when one installs a desktop system, he cannot install a dns server without telling network-manager to stop the local resolver hack
22:42
zamba: try from an ubuntu client first, to check if it's a server or client problem
22:42
<[conrad]>
alkisg: As mentioned in my original post, I tried both items in that link.
22:43
<zamba>
alkisg: k
22:43
<alkisg>
[conrad]: sorry I read too fast. So, the dns on your server also doesn't work, right?
22:43
E.g. if you ssh to your server, or if you login locally (if it isn't headless), you don't have a working dns. Correct?
22:44
<[conrad]>
alkisg: Not the case. The server itself has full access to the internet.
22:44
<alkisg>
[conrad]: that doesn't make any sense though... you said "thin" clients, not "fat", right?
22:44
Or they're fat?
22:45
"Thin client users are not available to sudo commands to modify resolv file" ==> yup sounds like they're fat
22:45
So, back to lts.conf + DNS_SERVER
22:45
1) Verify that they're fat: open a terminal and see the hostname
22:46
If it's ltsp123, they're fat. If it's the server hostname, they're thin.
22:46
2) Get a local client shell and run `getltscfg -a`, to check that your lts.conf settings actually reach the client and are parsed correctly. For example,
22:46
!screen_02
22:46
<ltsp>
screen_02: To get a root shell on an Ubuntu thin client: https://help.ubuntu.com/community/UbuntuLTSP/ClientTroubleshooting#Using_a_shell_SCREEN
22:47
<[conrad]>
alkisg: It does appear they're fat ( by the hostname you provided ). The devices themselves are of minimal resources, and that link from Ubuntu doesn't show "ltsp-update-image --cleanup /" command as being specific for thin nor fat.
22:48
<alkisg>
Clients with >400 RAM become fats automatically
22:48
If you want to force them to be thins, you can put LTSP_FATCLIENT=False
22:48
But if you only wanted thins, then why use the ltsp-pnp method?
22:48
<zamba>
alkisg: http://pastie.org/5450209
22:48
alkisg: seems to be a server problem
22:48
<alkisg>
[conrad]: That method mainly targets fat labs, or at least mixed fat + thin labs
22:49
zamba: 3d sessions won't run without 3d acceleration
22:49
Try gnome-fallback or unity-2d etc
22:49
<zamba>
well.. i've tried with gnome as well
22:49
<[conrad]>
alkisg: We already have a DHCP server on the server, and when I came in yesterday inquiring on a guide/link for that specific setup, I was provided the link.
22:49
<zamba>
alkisg: no option for that?
22:50
<alkisg>
[conrad]: ah, you were misguided then, the dhcp setup is unrelated to the "no chroot == ltsp-pnp" method
22:50
<zamba>
unity, kde, gnome, xfce and so on
22:51
<alkisg>
[conrad]: for the dhcp part, you have 2 options, either change your existing dhcp server to offer the boot filename + next server, or use a proxydhcp (ltsp-pnp does the second one, but you don't want its no-chroot part though)
22:51
https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
22:51
https://help.ubuntu.com/community/UbuntuLTSP/LTSPWindowsDHCP
22:52
[conrad]: ltsp-pnp can work with thin clients too though. It just takes a bit more time to generate the image
22:52
So, for a quick solution, try LTSP_FATCLIENT=False in lts.conf
22:53
zamba: do you have gnome-fallback or unity-2d installed? Which version of ubuntu is this?
22:54
<zamba>
i'm trying gnome-session-fallback now
22:54
*sigh*
22:55
well.. i now got four small new windows
22:55
i'm trying just gnome now
22:56
http://pastie.org/5450234
22:57
stupid
22:57
<[conrad]>
alkisg: Tried that. Doesn't seem to work. But did confirm with a VM with 256MB that everything works as expected.
22:57
<zamba>
as i said.. everything that works for everyone else will break for me without reason
22:58
<alkisg>
[conrad]: it sounds like your lts.conf doesn't apply to your clients
22:58
Paste its contents first to pastebin
22:58
<zamba>
alkisg: i tried single application and then /usr/bin/gnome-session-fallback
22:58
<alkisg>
zamba: or try single application + xterm
22:58
And then try fallback from the xterm window
22:59
<zamba>
nope
22:59
Nov 28 23:58:14 thinny /usr/bin/x2gostartagent: successfully started X2Go agent session with ID marius-66-1354143492_stRTERMINAL_dp24
22:59
Nov 28 23:58:22 thinny /usr/bin/x2gomountdirs[17127]: WARNING: mounting of /home/marius/.x2go/S-marius-66-1354143492_stRTERMINAL_dp24/spool failed
22:59
<[conrad]>
alkisg: Seems you might be right. Even though I've only created 64-bit images, and have 64-bit clients running, I see the following message in the server's syslog "Nov 28 17:55:59 vm-rdp1 dnsmasq-tftp[2974]: file /var/lib/tftpboot/ltsp/i386/lts.conf not found". Will pastebin full contents shortly.
23:01
alkisg: http://pastebin.com/JH8673c2
23:02
Actually, the thin client gets the same error.
23:02
<alkisg>
[conrad]: and, the output of `ls -l /var/lib/tftpboot/ltsp/i386/lts.conf` ?
23:03
zamba: in the x2go session properties dialog, try disabling print support
23:04
<zamba>
trying that now
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23:04
<zamba>
alkisg: nah
23:05
<alkisg>
zamba: and that's from a linux client?
23:05
<zamba>
yup
23:05
client installed from the same ppa as the server
23:05
<alkisg>
zamba: type: /j murphy
23:05
:P :D
23:05
*/nick, sorry
23:06
It's late here though, 'night all...
23:06
<zamba>
:(
23:06
i've fucking had it
23:06
<alkisg>
(there's an x2go mailing list)
23:06
<zamba>
so tired of stuff not working
23:06
stuff NEVER, ever works for me
23:06
i have to spend hours and hours debugging every single little thing
23:07* alkisg hopes epoptes will at least work out of the box for zamba... epoptes.org/installation
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23:07
<zamba>
i can pretty much guarantee you it won't
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