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


Channel log from 27 August 2012   (all times are UTC)

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05:36
<qwebirc86595>
hello
05:37
anyone around ?
05:39
how do i start x11vnc on the client side ??
05:39
<muppis>
x11vnc -noshm -connect <host>
05:40
<qwebirc86595>
i am getting display error.
05:44
<alkisg>
!epoptes
05:44
<ltsp>
alkisg: 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
05:55
<Phantomas>
alkisg: spammer :p
05:56
<alkisg>
Nah, it just makes vnc'ing to clients so much easier :)
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06:14
<elias_a>
BTW - how do you guys inform the students about use of Epoptes?
06:15
There's been a lot of discussion in Finland that monitoring computer use without explicit consent is against law.
06:18
<qwebirc86595>
can i setup x11vnc on the server and the client .. to allow client to view the server desktop and vise versa?
06:18
trying to avoid epoptes
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06:23
<mealstrom>
good morning
06:23
<knipwim>
morning mealstrom !
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07:25
<alkisg>
(09:15:33 πμ) elias_a: There's been a lot of discussion in Finland that monitoring computer use without explicit consent is against law. => and that applies to students too, even when the teacher explicitly tells them that he's monitoring their computers, and even if he's in the classroom and is monitoring the computers with his eyes anyway?
07:28
I've heard that's true for Italy too, and it made me wonder how are sysadmins supposed to have root access without having access to everything the students do in their PCs as well...
07:28
Logging facilities, ssh, ~/mozilla history... all those should be forbidden then
07:30
Multiuser systems like Linux and LTSP should be forbidden as well :)
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08:08
<Hyperbyte>
alkisg, the key is "without explicit consent"
08:13
It's very good that there's discussion about privacy laws like that.
08:13
It makes it illegal for me to secretly install a VNC server on your computer, or to sniff your network packets
08:14
Those laws will force companies or schools, or public places with computers, to make it clear to users that "yes - you are being monitored"
08:18
Few years ago we had the same problem here, with an employee who got fired, and then my boss took over her mailbox and everything that was in it
08:19
Seems reasonable enough, but she wanted to take us to court for invading her private e-mail (it was her personal mailbox, on the company servers, i.e. jan@company.nl)
08:20
Our lawyer advised us that this won't hold up in court because something that so clearly a company mailbox, cannot be considered "private property"
08:20
But he also said we should add a notice, just to make sure. Since then we have this notice on every login prompt, including ldm, and we also put it in contracts:
08:20
http://users.recreatie-zorg.nl/jan/ldm.jpg
08:21
Makes sense though, to me... maybe there could be some universal logo that indicates "this system is monitored"
08:21
So all sysadmins can put it on the systems they monitor
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08:28
<markit>
hi, am I wrong or ltsp-build-client does not have an option to use the apt cache of the host? I've the feeling that is working in chroot and re-downloading a LOT of stuff
08:32
<Hyperbyte>
markit, if you want that, you need to set up a local repo and use the --mirror argument I think.
08:33
Often the host apt cache can't be used anyways due to different architectures
08:33
<markit>
Hyperbyte: this could be a workaround
08:33
Hyperbyte: host and guest are both i386, and if you use ltsp-chroot you have the option to use host cache just for this situation
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08:34
<markit>
Hyperbyte: I also have an apt-cacher-ng, but I'm not asked about a proxy
08:34
<Hyperbyte>
markit, for the build it'd less useful though, because there's no cached downloads for kernel and all the base packages LTSP needs, since those were installed from CD
08:35
<markit>
Hyperbyte: do you think that i.e. kde packages took from cd don't go in apt cache?
08:36
mmm in this case you could be right
08:38
<Hyperbyte>
markit, seems a bit pointless if you install something from CD? Copying the whole installation to harddisk first, and then installing. Would be redundant. Windows XP does that and the installation takes hours.
08:38
I don't -know- this, but it would seem to me that apt would cache anything it downloads, not anything that is already downloaded.
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09:01
<alkisg>
Hyperbyte: so, it's not illegal to install a vnc server (or epoptes etc), it's just illegal to use it without user consent, right? So if a teacher only uses the monitoring/controlling functions when a student asks him to, everything is fine?
09:03
markit: ltsp-build-client --mount-package-cache
09:03
You don't need apt-proxy-ng etc in an LTSP environment, it's useless
09:04
<markit>
alkisg: oh, thanks (apt-proxy is in my home environment)
09:04
I've to run see later
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09:33
<Hyperbyte>
alkisg, I think that's the concept yes.
09:34
<alkisg>
Cool
09:35
<Hyperbyte>
Either way, people need to be taught that doing things on someone elses' computer means that you can easily be monitored.
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10:17
<piet>
@alkisg Hi, since we tried to make epoptes run, the ltsp-image on second server refuses login of users. I drove to the lab now. Do You have time? Should I let You in ?
10:17
<alkisg>
Hi piet
10:17
piet: do you have LDM_SSHOPTIONS in that server's lts.conf?
10:20
<piet>
@alkisg there was a rem in front. Did You have to set that during that action?
10:20
<alkisg>
Remove the comment, reboot a client and see if it logins
10:20
<piet>
@alkisg a moment . . .
10:23
@alkisg yes, it works. Thanks. Let me check, if I can see the epoptes clients right now . . .
10:24
<alkisg>
piet: did you manage to split your clients into your 2 servers from your dhcp server settings?
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10:29* alkisg loves his new sd-ext partition in his android phone... 1.5 Gb of space available to install apps, instead of 100 mb :D
10:29
<qwebirc56905>
hello
10:30
I have acquired a wyse z90dz thin client with Suse Enterprise linux
10:30
i have a running ltsp server that I would like to connect to
10:31
is it possible to use the preinstalled suse os to connect as a client?
10:31
<Hyperbyte>
qwebirc56905, sounds like a plan. Set the thin client in BIOS to do network boot, and you're done.
10:32
<qwebirc56905>
thanks for your help, the previous administrator did not enable PXE boot and I think the clients are on a different subnet
10:32
is it possible to point the local client to the server?
10:32
<Hyperbyte>
You can just go into the BIOS and enable it
10:33
You probably can, but it's a whole lot easier to do PXE.
10:33
<qwebirc56905>
currently the other clients are running debian-builds that have been dd'd to their local harddrives
10:33
<Hyperbyte>
qwebirc56905, why would you do that?
10:33
The whole point of LTSP is that you don't need harddrives anymore
10:34
It can do network boot out of the box... unless you don't have PXE capable clients, it should be your first choice for booting.
10:34
<qwebirc56905>
yes, i understand, I am just taking over from a previous administrator,
10:34
doesn't PXE need to have the server on the same subnet as the clients?
10:35
plus the other problem is that the university's IT people have their own DHCP server running
10:35
so we don't want to interfere
10:35
<Hyperbyte>
I don't -think- so, but you'd need a router that routes UDP and a DHCP server on the local network
10:35
Well that's easy... you can configure proxy DHCP
10:36
Basically you have: <university network> -- <LTSP server> -- <LTSP clients>
10:36
<qwebirc56905>
we have a server in one room and the lab in another and they happen to be on different subnets
10:36
<alkisg>
Also, local booting will allow your clients to do XDMCP, not LTSP. So no sound, local devices etc
10:36
<Hyperbyte>
Where the LTSP server relays DHCP from the university network, and add the PXE network boot required bits.
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10:37
<Hyperbyte>
qwebirc56905, sounds like your setup is more complicated than it needs to be.
10:37
<qwebirc56905>
actually for local booting we used the ltsp-debian-build
10:37
and we boot off the nfs mount
10:38
so its a proper ltsp client
10:38
only the ltsp debain build is already on the local client
10:38
<alkisg>
LTSP doesn't support that without editing the initramfs sources
10:38
So I really doubt that works as you think it is
10:38
Anyway, the easiest way is to install ipxe on grub on the clients
10:39
Plays with any distro, doesn't need a dhcp server, then the client boots from the network
10:39
<qwebirc56905>
yes I think the previous admin guy did something like that
10:39
<alkisg>
You install it once and then forget about the client local installations completely, you just maintain the ltsp server then
10:40
<qwebirc56905>
ok so how do I set up the server to work with PXE, especially across a different subnet
10:40
<alkisg>
It doesn't need configuration, just don't install a dhcp server in it
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10:40
<alkisg>
What you need is a tiny ipxe configuration script
10:41
<qwebirc56905>
ok
10:41
<alkisg>
That does: dhcp net0; set next-server=ip of ltsp server; boot
10:41
<Hyperbyte>
qwebirc56905, what you need to do is configure the IP of the server and location of the image in GRUB ipxe
10:41
Right, what alkisg said. :)
10:42
<qwebirc56905>
ok, so let me try that on the current lab machines
10:42
then for the wyse thin client
10:42
<Hyperbyte>
Normally a DHCP server tells thin clients where to find the boot server and boot image. You'll need to tell that to the bootloader instead.
10:42
<qwebirc56905>
it boots into suse enterprise
10:44
<Hyperbyte>
qwebirc56905, some advice: get a laptop without internet, create two virtual machines, one LTSP server and one LTSP client, and see how LTSP works out of the box, with PXE
10:44
This will give you valuable experience, and will show you the concept of a regular, normal LTSP installation
10:44
Then when that works, try installing grub ipxe into the thin client, see how it boots then
10:44
And when that works, implement it in your lab.
10:45
<qwebirc56905>
fair enough :), I was just hoping I could plug this wyse thin client into an already setup and working ltsp system
10:45
<Hyperbyte>
qwebirc56905, yes, you can - if you use regular, non-hacked LTSP.
10:46
Give it to me, I'll set it to do netboot in BIOS (they usually do by default already, so probably not even needed)
10:46
<qwebirc56905>
sure :)
10:46
<Hyperbyte>
Then I attach it to network, and my LTSP server does the rest.
10:46
<qwebirc56905>
yes it does a pxe search already
10:46
but like i said the server is on another subnet
10:47
so it doesn't find anything
10:47
<Hyperbyte>
But the previous admin has hacked LTSP to work in some way he thought was good - and it works, congrats - but now you're running into problems because a) nobody knows exactly how it works and b) you've lost a lot of benefits that LTSP brings
10:47
<qwebirc56905>
i agree
10:48
<Hyperbyte>
So, keep in mind what alkisg and I said: GRUB with IPXE is your best option when you have clients on another subnet than the server, and can't run DHCP
10:48
<alkisg>
qwebirc56905: another way to implement it is to install a proxydhcp server in that subnet. It's very small and easy, but it does require a linux pc that's always up in that subnet.
10:48
(that doesn't interfere with the univ dhcp setup)
10:48
<Hyperbyte>
And then first start with doing a regular LTSP installation on a test machine, it'll give you lots of valuable information about how LTSP works.
10:48
<qwebirc56905>
ok cool
10:48
can we expand on this solution
10:49
<Hyperbyte>
Or, you could go all-in and change the basics... for example, get your server to your subnet. Then you fix everything in one go.
10:49
<alkisg>
The proxydhcp solution? Do you have a linux pc that's always running? Which distro/version?
10:49
<qwebirc56905>
yes proxydhcp
10:49
do you mean in the lab
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10:50
<alkisg>
I mean in the same subnet as the clients, so that you don't need to use dhcp relays
10:50
<qwebirc56905>
no, I currently don't, only lab computers come on when students need them. I could put one on permanently.
10:50
<Hyperbyte>
qwebirc56905, couldn't you just move the server to the lab?
10:51
<alkisg>
OK, for general info about proxydhcp:
10:51
!proxydhcp
10:51
<ltsp>
alkisg: proxydhcp: A proxy DHCP server is defined by the PXE specification as a server which sends auxiliary boot information to clients, like the boot filename, tftp server or rootpath, but leaves the task of IP leasing to the normal DHCP server. More info: https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
10:51
<qwebirc56905>
there is a security risk
10:51
<Hyperbyte>
qwebirc56905, how so?
10:53
<qwebirc56905>
server in locked up server room, but the lab is accessible by all students.
10:53
ok so proxy dhcp sounds like the answer
10:53
<Hyperbyte>
qwebirc56905, wait - question about your setup
10:53
Is each lab connected to it's own switch?
10:54
<qwebirc56905>
one lab with one switch/hub (not sure exactly), connecting to university switch, university provides DHCP
10:55
<Hyperbyte>
Suggestion: <uni network> -- <ltsp server with dhcp proxy> -- <lab switch> -- <thin clients>
10:56
Then you don't need a PC 'always on' in the lab, you just connect the entire lab directly to the LTSP server, and go to the uni network via the LTSP server.
10:56
<qwebirc56905>
cabling between lab switch and server is difficult to setup
10:56
<Hyperbyte>
Then you use traditional two nic LTSP setup. That's very common and very well documented solution.
10:57
qwebirc56905, well, it would require you to patch exactly two cables. Shouldn't be too difficult, unless your previous sysadmin has -really- made a mess of things. In which case, you have bigger problems. :P
10:57
<qwebirc56905>
we may want to setup clients in staff members offices as well, so we have to use the university networking
10:58
<Hyperbyte>
mhm
10:59
<qwebirc56905>
thanks for the two nic suggestion I plan to look into it, but for the short term, i want to try your dhcp proxy suggestion
10:59
<alkisg>
qwebirc56905: if you want even more subnets for office pcs, then maybe ipxe is best for you
10:59
It's very easy to install on windows as well (for professors that have win installations)
11:00
<qwebirc56905>
but does ipxe work on a wys thin client?
11:00
<alkisg>
It wouldn't be a good solution to require a proxydhcp server on each different subnet...
11:00
Sure
11:00
You just put it in the grub menu
11:00
It's distro independed
11:01
<Hyperbyte>
qwebirc56905, is the university cooperative with you? Because if they are, and they're not already using PXE boot, they could as well configure -their- DHCP server to help your thin clients find the LTSP server. If they're not using PXE boot, this will not affect any of the computers in the network, except the ones you configure to do PXE boot. This would be the holy grail of solutions.
11:02
<qwebirc56905>
funny you ask about being cooperative :), this university is a one-stop microsoft shop :(
11:02
<Hyperbyte>
Doesn't matter. Microsoft DHCP server can be configured to send PXE boot info for LTSP.
11:03
Only question is: are they using PXE already somewhere on the network? If they aren't, they could make LTSP PXE boot work through the entire network in one go.
11:03
<qwebirc56905>
i meant and they can't stand anything linux :(, so i doubt I would get their support, but thanks for the suggestion
11:04
so we have settled on the ipxe solution
11:04
<Hyperbyte>
https://help.ubuntu.com/community/UbuntuLTSP/LTSPWindowsDHCP <- have a ready anyways
11:05
*read
11:05
<qwebirc56905>
thanks. just remind me, on the wyse device, isn't the suse enterprise booting ROM encoded, so I won't be able to mess with grub?
11:09
<alkisg>
I don't know that model, but it's usually a DOM device, like an embedded disk, writeable normally
11:09
Not ROM
11:09
<qwebirc56905>
and one last possibilty, when I boot into the built-in Suse setup, it allows me to connect to an X server, how do I configure the ltsp server to allow this?
11:10
<alkisg>
That's a generic ubuntu question, not related to ltsp. You do that from lightdm.conf
11:10
It's difficult to have ROMs of e.g. 100 MB size, so it's usually a writeable disk-like medium
11:11
Boot with a usb live stick and check for yourself
11:11
Or just check from within suse
11:11
<qwebirc56905>
when the client boots it doesn't give the option of boot device
11:11
wyse client I mean
11:12
<alkisg>
Press f2, f8, f11, f12 etc
11:12
But you can do that from suse as long as it gives you a root terminal option
11:12
<qwebirc56905>
yes, it does, thanks for the option
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11:13
<qwebirc56905>
thank you to both Hyperbyte and alkisg for your patient help
11:13
I am really impressed :)
11:13
<Hyperbyte>
Sure!
11:13
By the way
11:13
<alkisg>
You're welcome
11:13
<stgraber>
r/win 37
11:13
<Hyperbyte>
If you're using LTSP, be sure to add yourself to the LTSP world map
11:13
<stgraber>
oops
11:14
<Hyperbyte>
qwebirc56905, http://www.ltsp.org/stories/
11:14
<qwebirc56905>
sure, we have had a working lab for a year now :)
11:15
thanks, I hope to come back and pick your brains some more another time :)
11:15
<Hyperbyte>
Looking forward to reading your story. :)
11:16
<qwebirc56905>
Bye...
11:16
<Hyperbyte>
Byebye!
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11:19
<Hyperbyte>
I have some question I want to throw out here see what happens
11:19
Ubuntu 12.04, thin clients, cups, HP Laserjet 4300 printer
11:20
Many times, while printing certain documents with large images, the printer just stops and cups hangs on the printjob saying "Processing since..."
11:20
Well printer doesn't actually start
11:20
To be more precise.
11:20
Does this ring any bells?
11:20
<alkisg>
Libreoffice only? Or that happens with pdf too?
11:21
<Hyperbyte>
Often with LibreOffice I think, but I think it also happens with PDF
11:21
Currently I'm looking at the print job in /var/spool/cups/ and it seems like cups has generated a proper PDF for printing
11:21
It just doesn't print
11:21
<alkisg>
And the printer is connected to the network, or directly to the server, or...?
11:22
<Hyperbyte>
Network
11:22
No localapps, server apps use cups on the server directly, which connects to the printer.
11:22
<alkisg>
Then it doesn't sound ltsp related... dunno, I've heard about problems with libreoffice printing but not about general printing problems
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11:23
<Hyperbyte>
Just removed the job cups was hanging on and the printer immediately started again
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13:50
<markit>
alkisg1: new nick :) I'm fine tuning the fat chroot, I've removed grub-common grub-pc, you confirm that are useless? Why they insist in installing them?
13:50alkisg1 is now known as alkisg
13:51
<alkisg>
They're indeed useless, they're pulled in by the kernel package
13:51
<markit>
I've been asked if uninstall the bootloader too... I said YES, ok?
13:52
<alkisg>
Errr I don't remember that question, did you have /sys, /dev etc mounted?
13:52
(bind-mounted in the chroot)
13:52
ltsp-chroot -a ?
13:52
Or -m, whatever it is...
13:52* alkisg stopped using chroots now with ltsp-pnp...
13:53
<alkisg>
Anyways if your server reboots ok, you're fine :)
13:55
<markit>
alkisg: argh, don't loose your knowledge about "the old ltsp way" pls, I need your help and probably ever will :)
13:55
how are things going with ltsp-pnp, btw?
13:56
<alkisg>
Just fine, we've no need for the "old-way" anymore :)
13:56
<markit>
ehm, yes, I've it bin mounted, a risk?
13:56
let's try to reboot then, sigh
13:56
<alkisg>
So I think it's time you dive in, read the code, send patches etc!
13:57
<markit>
alkisg: lol, I'm still trying to learn python, sigh
13:57
so my plans are as usual too optimistic
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14:04
<markit>
alkisg: it still boots (I entered chroot with ltsp-chroot -a i386 -p -d -c), so can I consider that is safe answery "yes" when prompted about boot loader remove? Or I was just luck?
14:04
btw, where is the source of ltsp-pnp hosted? would love just have a look
14:04
<alkisg>
markit: so it's safe, yeah
14:04
!ltsp-source
14:04
<ltsp>
alkisg: ltsp-source: at http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/files
14:05
<alkisg>
ltsp-pnp is there ^
14:05
Along with the rest of ltsp
14:05
<markit>
oh, so good, is an "official" project then
14:05
<alkisg>
It's actually only an ltsp-update-image parameter
14:05
There's no "ltsp-pnp" package or executable...
14:06
<markit>
ehm, probably you are too busy, but is there / will be there soon a "high level explaination" of the stuff?
14:06
<alkisg>
!ltsp-pnp
14:06
<ltsp>
alkisg: 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
14:07
<markit>
I've to run, brb, and will read the url, thanks
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14:11
<markit>
wow :)
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14:36
<alkisg>
knipwim: http://ts-new.sch.gr/mediawiki/index.php?title=%CE%95%CE%B9%CE%B4%CE%B9%CE%BA%CF%8C:%CE%A3%CF%85%CE%BB%CE%BB%CE%BF%CE%B3%CE%AE&bookcmd=download&collection_id=569914736b256cfa&writer=rl&return_to=%CE%91%CF%81%CF%87%CE%B9%CE%BA%CE%AE+%CE%A3%CE%B5%CE%BB%CE%AF%CE%B4%CE%B1
14:36
We installed a mediawiki module that generates .pdf files from wiki page "collections"
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14:37
<alkisg>
It might prove useful for ltsp.org as well...
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14:43
<markit>
alkisg: I've some weird problem with dhcp
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14:43
<markit>
tsharking the bound1 I have a sequence of
14:44
discover, offer, request, ack and then discover again...
14:44
until the client gives up
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14:45
<markit>
is there any parameter for the bond interface that could make some harm in the process?
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14:48
<markit>
maybe is waiting for a boot parameter I miss
14:51
mmm the log has some errors
14:52
no, not related with dhcp (just a mistype in /etc/hosts)
14:57
client bios says "PXE-E55: ProxyDHCP service did not reply to request on port 4011"
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15:12
<alkisg>
markit: do you have another dhcp server that sends nak messages?
15:12
<markit>
not that switch
15:12
not on that dedicated switch
15:12
<alkisg>
Was it working before you tried the bonding part?
15:13
<markit>
new installation, always with bond, first time I try if works
15:13
<alkisg>
markit: proxydhcp? are you using a proxy dhcp server or a normal one?
15:14
<markit>
normal one as far as I understand, let me pastebin you dnsmasq.conf
15:14
<alkisg>
dnsmasq isn't a good dhcp server in normal dhcp mode
15:15
So it'd be better if you used the regular isc-dhcp, like also the standard ltsp installation proposes
15:15
dnsmasq is good for proxy-dhcp mode, but not for the normal one
15:15
Its dhcp code is not reentrant and that causes great delays
15:16
<markit>
alkisg: http://pastebin.com/K88q6JLV
15:16
alkisg: I've ever used dnsmasq so far, sigh, I know was not the best but I though was what you also used and suggested as "working"
15:17
<alkisg>
In 99% of the cases here we're using it for proxy dhcp
15:17
In 1% of the cases, they're using 2-nic setups, and dnsmasq works there as well, but only for a few clients
15:17
<markit>
I see (don't know how to configure for proxy dhcp, I should since sooner or later I will face that kind of setup)
15:17
<alkisg>
If one isn't using proxydhcp, there's no reason for him to prefer dnsmasq
15:18
<markit>
is just it provides a lot of functionalities, like dnscach, tftp and dhcp
15:18
one tool for 3 good things :)
15:19
[01:29] [alkisg] running `dhcp net0` and then `config` on the command line is the best way to see what the client gets
15:19
this you meant was to run on the server?
15:19
http://www.nubae.com/logs/ltsp20100812_pg1.html
15:19
<alkisg>
No, on the client booted with ipxe
15:19
!irclogs
15:19
<ltsp>
alkisg: Error: "irclogs" is not a valid command.
15:20
<alkisg>
!learn as irclogs This channel is logged, archives are available at http://irclogs.ltsp.org
15:20
<ltsp>
alkisg: (learn [<channel>] <key> as <value>) -- Associates <key> with <value>. <channel> is only necessary if the message isn't sent on the channel itself. The word 'as' is necessary to separate the key from the value. It can be changed to another word via the learnSeparator registry value.
15:20
<alkisg>
!learn irclogs as This channel is logged, archives are available at http://irclogs.ltsp.org
15:20
<ltsp>
alkisg: The operation succeeded.
15:21
<jocarter>
hey alkisg!
15:21
<alkisg>
Heya jocarter :)
15:22
markit: sudo /opt/ltsp/i386/usr/lib/klibc/bin/ipconfig -n bond1
15:22
What's the output there?
15:22
<markit>
IP-Config: bond1 hardware address 00:0a:cd:1a:52:60 mtu 1500 DHCP RARP
15:22
<alkisg>
It didn't write anything about getting some ip address from a dhcp server, did it?
15:23
<markit>
ehm, after I fixed the error in /etc/hsots, I noticed the message about PXE-E55: ProxyDHCP service did not reply to request on port 4011
15:23
BUT now I see there has been a IP assigned!
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15:24
<markit>
so it gets 192.168.1.124 (strange did not stareted with .100?)
15:24
DHCP IP 192.168.20.1
15:25
and then the PXE-E55: Pr... message
15:25
<alkisg>
The client got 192.168.1.x? Isn't that from your dhcp server on the other switch?
15:25
<markit>
sorry, my mistype
15:26
192.168.20.124
15:26* markit asames
15:26
<alkisg>
And the output of `sudo /opt/ltsp/i386/usr/lib/klibc/bin/ipconfig -n bond1` didn't show an ip address, correct?
15:26
<markit>
correct
15:26
(I had to issue ^C to terminate, correct?)
15:27
<alkisg>
It doesn't matter, it would have quitted after 60 seconds
15:27
So the client did get an ip address, yet it failed to boot?
15:27
<markit>
seems so :)
15:27
I can try to reboot now
15:28
<alkisg>
It looks like dnsmasq is advertising the proxy mode even if you didn't declare it
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15:28
<markit>
can't be a problem that does not find the rest of the boot process? I can't express myself clearly, but seems to me to recall from you
15:29
that maybe was asking the rest of info for the pxeboot but did not got them
15:29
<alkisg>
Try with ipxe, it gives a more clear view of the situation
15:29
<markit>
ok, let me try to find it and burn a cd
15:40
usual luck.. I've downloaded ipxe.iso, created a cd but does not boot, nor system rescue cd, probably faulty cdrom :(
15:40
I'll try with an usb key, hold on, sigh
15:48
alkisg: seems to work... tftp loading ... 90%
15:48
now is stick at "Trying to load pxelinux.cfg/default OK"
15:49
frozen? do I have to press enter?
15:53
<knipwim>
alkisg: i gather you use this one? http://www.mediawiki.org/wiki/Extension:Collection
15:54
<markit>
tehre is some traffic: 6.010368 192.168.20.124 -> 192.168.20.1 UDP 60 Source port: 49163 Destination port: 46568
15:54
<knipwim>
also, i got a login problem on my local ltsp boot
15:55
when logging in, it's like the name of the user isn't sent
15:55
this line, which appears on normal logins, isn't present:
15:55
SSH: Server;Ltype: Authname;Remote: 192.168.0.11-49973;Name: wim [preauth]
15:56
it just connects and then fails with a Connection closed by 192.168.0.14 [preauth]
15:56
and the server public keys are copied to the client
15:56
any hints?
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16:02
<alkisg>
knipwim: yup, extension:collection
16:02
knipwim: and ssh (without ldm, login etc) works fine locally, from the root account?
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16:03
<alkisg>
Eh, the user account, rather
16:03
su -; ssh user@server
16:04
markit: no you don't need to press enter
16:04
!quiet-splash
16:04
<ltsp>
alkisg: quiet-splash: to disable the splash screen in Ubuntu, in order to see any boot error messages, run `sudo gedit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default` and remove quiet splash .
16:04
<alkisg>
It's probably very very slow at the tftp downloading for some reason
16:04
But do press ctrl+b, write dhcp net0 and config, and check if you got all the expected info
16:06
<markit>
right now? seems to ignore the keyboard
16:06
what about plymouth:force-splash ? remove that too?
16:10
rebooted, ^b, I don't know if everything ok, what surprises me that under proxydhcp I've items, but refer to the dhcp server 192.168.20.1
16:10
so maibe is just a duplicated info
16:11
is filename /ltsp/i386/pxelinux.0 ok?
16:13
<knipwim>
alkisg: ok, it's logging in now, but only after I added the server ssh key to the /root/.ssh/known_hosts
16:15
and I see I don't have my server home dir mounted
16:25
<markit>
62.846398 192.168.20.1 -> 192.168.20.124 TFTP 141 Error Code, Code: File not found, Message: file /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/64b2f4b8-74fe-d511-85e4-4879282662ae non trovato
16:25
mm that looks interesting
16:25
oh, not at all, sorry for the noise
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16:29
<alkisg>
markit: so all info seems ok? After dhcp net0, try: kernel /ltsp/i386/vmlinuz, how long does that take? More than a few secs?
16:30
<markit>
alkisg: seems stuck at Loading mvlinuz..
16:30
is slow like hell.. probably it will take 2 days to load
16:30
<alkisg>
knipwim: there's a check about mounting /home/username, if it's on a different partition than /, it's assumes that it was already by other means and it doesn't use sshfs for it
16:31
knipwim: err what's the use case exactly? Copied a chroot to some client locally?
16:31
<markit>
alkisg: wife's calling, brb asap
16:32
(now in not yet reacing loading vmlinuz, I'm capturing the traffic anyway)
16:32
<knipwim>
alkisg: i installed ltsp-client and ldm on my laptop, and trying to boot it into ltsp using a local grub init=/sbin/init-ltsp line
16:33
<alkisg>
knipwim: but you do have a server nearby, right?
16:33
<knipwim>
yes
16:33
on the local net, it's retrieving the lts.conf from there
16:33
<alkisg>
knipwim: did you / should you get a cow environment?
16:33
(tmpfs etc)
16:34
<knipwim>
yeah, the gentoo bind mounts :)
16:34
<alkisg>
Ah right
16:34
<knipwim>
except /home though
16:34
<alkisg>
And your local disk is mounted ro, right?
16:34
<knipwim>
erm, no
16:34
that would probably be a good idea :)
16:35
<alkisg>
Yeah, let's try to simulate the environment more accurately... and also avoid any side effects to your laptop :)
16:35
bbiab
16:41
<markit>
alkisg: do you think worths the trouble try to reconfigure with eth1 instead of bond1? looks it like a networking issue?
16:42
<alkisg>
markit: well, try some other protocol than tftp, e.g. nbd, http...
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16:43
<alkisg>
If they all suck, then sure, it's a networking issue, if only tftp sucks, then it sounds like "no"
16:43
<markit>
ehm, how could I try a different protocol?
16:43
do you mean connect a laptop with fixed compatible IP and try to navigate and so on?
16:44
<alkisg>
cd /boot; python -m SimpleHTTPServer
16:44
<markit>
you mean ^b, then ..? where cd /boot?
16:44
<alkisg>
No, on the server
16:45
Then, on some other pc, open a web browser, and go to this url: 192.168.20.1:8000
16:45
<markit>
ok
16:45
<alkisg>
And download the kernel from there, see how long it takes
16:46
knipwim: what's the output of `cat /proc/mounts` when you've booted as an ltsp-client?
16:53
<markit>
alkisg: starting.... and seem frozen
16:54
wondering if some iptables rule or squid3 stuff can hurt (should not but...)
16:55
<knipwim>
alkisg: http://dpaste.com/792139/
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16:56
<markit>
alkisg: with wireshark, I see that each datapacket is sent twice... bad boinding?
16:57
<cliebow>
boinking?
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17:00
<knipwim>
i added the "ro" option as a kernel parameter, but i think it still uses the /etc/fstab file to remount to rw
17:01
<alkisg>
knipwim: normally /etc/fstab is overwritten, it's in the bind-mounted list, isn't it?
17:01
knipwim: ah, ro for the kernel parameter is usually for the initramfs
17:02
Not for the root disk
17:02
(I think)
17:02
...or not... well..
17:03
<knipwim>
alkisg: how is it overwritten? only if $CONFIGURE_FSTAB is provided right?
17:03
<alkisg>
That's true by default
17:04
http://www.kernel.org/doc/Documentation/kernel-parameters.txt => ro [KNL] Mount root device read-only on boot
17:05
<knipwim>
well my /etc/fstab is certainly not overwritten
17:05
<alkisg>
./client/share/ltsp/init-ltsp.d/50-fstab:if [ -n "$CONFIGURE_FSTAB" ] && ! boolean_is_true "$CONFIGURE_FSTAB"; then
17:06
Does `cat > file` work with bind-mounts?
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17:06
<knipwim>
i see, a long forgotten CONFIGURE_FSTAB=False in my lts.conf
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17:09
<knipwim>
but still mounted rw
17:10
<alkisg>
cat /proc/cmdline?
17:10
<knipwim>
ip=eth0:dhcp root=UUID=748f4a26-f9d4-4081-9d79-ab44b7ec3d2b ro init=/sbin/init-ltsp ltsp.server=192.168.0.1
17:11
i actually saw dracut mounting with options ro
17:11
<alkisg>
Try ltsp.break=50-fstab
17:11
You'll see if it's mounted ro at that point... if not, you can remount it ro to see if it changes anything
17:12
<knipwim>
also a reminder to document ltsp kernel parameters :)
17:12
<alkisg>
!alkisg-todo
17:12
<ltsp>
alkisg: alkisg-todo: (#1) ltsp-update-image.symlinks, or (#2) upload fixed nbd-server package in the PPA, or (#3) implement LDM_[PRE|IN|POST]SESSION_CMD, or (#4) put IPAPPEND support in ltsp-update-kernels, or (#5) prefer kernels from img rather than dir, or (#6) LDM password hash, or (#7) check remoteapps in fat clients
17:12
<alkisg>
Hehe completely forgot about that :D
17:13
<markit>
alkisg: solved :) or :(
17:13
was just that in /interfaces I put slaves none INSTEAD of bond-slaves none
17:13
sighhhhhhh!!!! thanks a lot for helping in troubleshooting
17:13
<alkisg>
Meh
17:13* knipwim is going to make dinner
17:13
<alkisg>
np, stupid error though
17:13
<markit>
I'm really shocked by this, in any case
17:13
<alkisg>
I mean, difficult to pinpoint
17:14
<markit>
alkisg: is not the error that scares me, but the lack of error info
17:14
yep... IT is really a nightmare sometime
17:14
a full afternoon wasted :(
17:14
yesterday I had to update a raid controller firmware
17:14
should have been a 10 minute work
17:15
it took 1 hour, just to be able to boot the pc with the "dos" disk
17:15
well, I have to fix my installation scripts ASAP ;P
17:16
and thanks again for the troubleshooting info, I would have not be able to solve alone
17:16
(I would be still at dhcp level hunting, lol)
17:17
<alkisg>
ltsp can send dos boot disks ;)
17:17
(over the network)
17:18
<markit>
alkisg: ehm, I keep it for the "advanced course" you will teach me in 2045,thanks ;P
17:42
<alkisg>
knipwim: rootflags= [KNL] Set root filesystem mount option string
17:44
(it shouldn't matter though, ro should be enough... try ltsp.break=50-fstab...)
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18:59
<markit>
mm seems I've still problems, sigh
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20:15
<qwebirc7673>
Hello
20:16
Looking for a bit of help setting up LTSP
20:16
<markit>
any expert about bonding? I've a lot of issues (in short... do not work)
20:16
qwebirc7673: just ask, hope someone can help :)
20:17
<qwebirc7673>
I have it up an running on CentOS6, however I would like to run rdesktop or freerdp instead of LDM
20:17
I don't see any docs on this, I've try to RTFM before going on IRC
20:18
Basically I want to use LTSP to run an office full of thin clients that use rdesktop to connnect to Windows Server Remote Desktop Session
20:22
<elias_a>
Right on.
20:25
<markit>
qwebirc7673: I have these lines under [default]
20:25
SCREEN_07 = ldm
20:25
SCREEN_08 = rdesktop -f -k it 192.168.1.5
20:26
so it automatically connects as rdp to host 192.168.1.5
20:26
of course you need the rdesktop package installed in your ltsp server
20:26
the above is an old old config for an old ltsp, hope it is still valid
20:27
<Hyperbyte>
markit, no
20:27
If you want rdesktop to replace LDM, you use SCREEN_07=rdesktop [arguments] -instead of- SCREEN_07=ldm
20:27
You don't need SCREEN_07=ldm if you're not gonna use it
20:27
<markit>
Hyperbyte: should be, but at those time did not worked
20:28
it worked only with screen_07 and 08
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20:29
<Hyperbyte>
markit, not reproducable on Ubuntu 12.04
20:29
<markit>
was in debian afaik
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20:33
<qwebirc7673>
Thanks Hyperbyte, where is SCREEN_07 set? (sorry for the newbie questions...)
20:34
<Hyperbyte>
!lts.conf
20:34
<ltsp>
Hyperbyte: lts.conf: http://manpages.ubuntu.com/lts.conf
20:34
<Hyperbyte>
qwebirc7673, and don't be sorry. :)
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20:53
<markit>
alkisg: the problem I have with the bound is not (or not only) due to the slave thing... I've it again, now seems to work, a random one
20:53
alkisg: I've changed to a 100mbs switch, and had a look at cat /proc/net/bonding/bond0
20:54
(also I've changed the name of the bond from bond1 to bond0, since with bond1 ifconfig -a showed also a bond0... not so good
20:54
)
20:56
<alkisg>
markit: I only tested bonding for 1 year before I upgraded to gigabit switch, and I wrote there my experience: https://help.ubuntu.com/community/UbuntuLTSP/Trunking
20:56
...now I don't even remember what I wrote :)
20:57
<markit>
alkisg: :) don't you use bonding with gbit switches also?
20:57
I do
20:57
<alkisg>
Many schools only have switches with 1 gigabit port, and also the pci bandwidth limit is 1 gbps, and also the clients are often 100 mbps, so it doesn't make much sense to trouble the teachers with bonding
20:58
Only on special occassions where the teacher is savvy enough, we talk about it in our forums and propose bonding
21:01
<markit>
fabolus, I enter "halt" and it does not switch off completely, sometime
21:01
is realling like walking on the eggs
21:01* markit depressed as usual
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21:03
<||cw>
markit: ubuntu 12.04? halt -p
21:03
they changed the default :/
21:05
<markit>
||cw: ehm, but sometime works, are you sure? and with the new default, what does it do? suspend?
21:08
||cw: thanks a lot, so at least is not the server malfunctioning :)
21:09
<||cw>
just stops everything and says "powered off" or something
21:10
like on the old AT systems that dont' support powering off
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21:30
<qwebirc7673>
I'm sure it's something obvious, but I've added SCREEN_07=rdesktop (arguments), I've even tried SCREEN_07=shell, but all of this seems to be having no effect. The lts.conf file was empty, is that normal?
21:32
<alkisg>
Yes, and, put [Default] as the first line
21:32
Btw where does the qwebirc7673 name come from? Any freenode-related site that hosts qwebirc?
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21:33
<markit>
alkisg: is he looking at the correct lts.conf? don't know about centos places
21:33
<alkisg>
No idea either
21:34
<markit>
qwebirc7673: are you editing /etc/lts.conf (WRONG) or which one?
21:35
btw, balance-alb works fine with http server, but not for pxe boot (arp timeout), let's go back to -rr
21:35
<qwebirc7673>
I'm connecting to IRC using the web chat client on www.ltsp.org/irc/
21:35
It auto-assigned me that name,
21:36
<alkisg>
Cool I didn't know we had that :)
21:36
<qwebirc7673>
I was editing /opt/ltsp/i386/etc/lts.conf
21:36
<markit>
qwebirc7673: no problem about your nick, at least for me... was asking about what file are you editing :) what path?
21:36
ok, wondering if is the right one for Centos
21:37
<qwebirc7673>
That was wrong, just got it.
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21:37
<qwebirc7673>
I had to edit the lts.conf under "/var/lib/tftpboot/ltsp/i386/lts.conf"
21:37
That one was not empty
21:37
<markit>
qwebirc7673: and there were no warning like "don't edit me"? :)
21:38
read all the comments on top, just to be sure
21:38
<qwebirc7673>
Nope, it was completely empty
21:40
<markit>
alkisg: don't know if is pxe client that ruins the behaviour of the bond, I've rebooted and now is slow like hell again, I'm hopeless
21:41
maybe an hardware problem on the switch, lol
21:41
I've also changed cabling
21:42
<alkisg>
markit: well, if all else fails, you can still assign different duties to the NIC, one to serve the nbd image and the other to handle the session
21:42
Or you can split the clients...
21:42
<markit>
alkisg: split the clients?
21:42
<alkisg>
Or try some channel like #networking, maybe they have some advice for you
21:42
Yeah, half of them to be served by nic1, the other half by nic2
21:43
<markit>
I've no idea how to do it, I will ask you in case (and when you have time)
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