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


Channel log from 23 May 2013   (all times are UTC)

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07:45
<lifeboy>
Good morning all!
07:50
Ubuntu 12.04 server with a client chroot of 10.04: I've been told 12.04 NBD is path based, whereas 10.04 was port based. How difficult is it to change the 12.04 to be port based? The reason is that my clients have all sorts of troubles with a later (3.x) kernel, the graphics drivers are not working for one, but there may be more. So I'm thinking of rather using 10.04 which I know is tried and testing with the client hardware
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08:36
<Gremble>
hi all
08:36
I'm on debian Wheezy and hitting up against the NFS default in PXE
08:37
I can manually set it to use NBD in pxelinux.cfg/default , but I'd like not to have to, is there a more permanent setting?
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10:12
<lifeboy>
Gremble: Just had the discussion with alkisg over the last week. Change the setting in the chroot /etc/ltsp/update-kernels.conf, run /usr/share/ltsp/update-kernels in the chroot, exit the chroot and run ltsp-update-kernels. That should make the change to NBD.
10:13
<Gremble>
lifeboy, fantastic thank you
10:19
<lifeboy>
Anyone here yet that can tell me how to change NBD server to run on a port again instead of a path, so that an older chroot client (Ubuntu 10.04) can connect to it?
10:38
<Gremble>
surely an NBD server is running on a port, and serving a path no?
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10:54
<lifeboy>
NBD server in Ubuntu 12.04 was changed to use named based (sorry, not path based as I said earlier) exports, but it can be changed to run on a port by using the oldstyle option. The question is how to change the config for LTSP.
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13:37
<lifeboy>
?
13:37
away
13:38
Strange, isn't away without a message supposed un-away me?
13:40
I'm pretty clueless when it comes to the finer intricacies of irc commands...
13:43
Anyone yet that has knowledge about how to run NBD server in "old style" port mode instead of name based operation?
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14:38
<||cw>
lifeboy: I'm not sure what you mean by "name based"
14:39
service name? like, from /etc/services? service names and port numbers are usually interchangeable.
14:39
so if you just want to run it on a different port, you can edit the services file, or just put the port number in there
14:40
don't forget to change the chroot too
14:40
er, not chroot, lts.conf
14:40* ||cw is still waking up
14:44
<Hyperbyte>
lifeboy, nbd name based vs port based is different way of accessing nbd image
14:44
Err, ||cw, not lifeboy
14:45
Named based: everything on port 2000, but client asks for image A or image B
14:45
<||cw>
ah
14:45
<Hyperbyte>
Port based: image A on port 2000, image B on port 2001
14:45* ||cw is out of date
14:46
<||cw>
and still kinda sleepy
14:46
<Hyperbyte>
lifeboy, you can configure port based vs. name based in the nbd config. There's documentation about that somewhere for sure. I believe as of Ubuntu 12.04, LTSP uses named based. Before that port based.
14:47
-d
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15:19
<gbaman>
Got a slight problem with my LTSP setup, fat client, login screen loads, I log in, it looks like it is about to load then it restarts the login screen and presents it again
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17:41
<lifeboy>
Hi all, sorry, it's evening here already and I had some people over...
17:42
I have found the NBD server config changes I think I need and will now test it.
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18:03
<lifeboy>
I'm setting the configuration for NBD: Would the /opt/ltsp/i386 group in the nbd config and swap use the same port or a different one? I've set the port for the first one to 2001.
18:04
<vagrantc>
in newer versions of LTSP it uses the standard NBD port...
18:04
it uses named based exports, and a single port
18:04
rather than distinguishing by port
18:04
10809
18:05
port-based exports are deprecated
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18:06
<gbaman>
evening all
18:07
hey vagrantc, got a question. On the pi, when i log in, it thinks a bit, then restarts the login screen
18:07
no error messages
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18:08
<gbaman>
i tried another user account, same thing
18:08
<vagrantc>
gbaman: probably bad host key
18:08
gbaman: normally fixed with ltsp-update-sshkeys
18:08
<gbaman>
already tried that
18:08
that isnt it
18:08
<vagrantc>
(and if doing NBD, ltsp-update-image)
18:08
<gbaman>
not using NBD
18:08
<vagrantc>
gbaman: is it connecting to the correct server?
18:08
<gbaman>
yes
18:08
<vagrantc>
how do you know?
18:08
<gbaman>
it is loading the entire image off the server
18:10
<vagrantc>
that doesn't tell me what server LDM is trying to connect to :P
18:10
gbaman: set up SCREEN_02=shell, and try: ssh user@server
18:10
<gbaman>
even if it was trying to connect to my second LTSP server, the login details are the same
18:12
<lifeboy>
vagrantc: I need to make an Ubuntu 10.04 kernel chroot connect to a 12.04 server using NBD. I tried a Wheezy chroot, but can't get the X display driver to work.
18:13
<gbaman>
when i enter the correct username it also says permanently adding host etc then the correct IP
18:13
<vagrantc>
lifeboy: that doesn't sound like fun at all :(
18:13
<lifeboy>
The 10.04 chroot works on the client hardware and I've spend a lot of time trying to get the Wheezy chroot to work, but the quickest way to get this resolved seems to be to just make bnd work in the "old" mode
18:13
<vagrantc>
gbaman: do you have SERVER= specified in lts.conf?
18:13
<gbaman>
no?
18:13
<vagrantc>
gbaman: or LDM_SERVER?
18:14
<gbaman>
nope
18:14
<vagrantc>
gbaman: in short, good.
18:14
<gbaman>
ok
18:14
<vagrantc>
gbaman: does it successfully log in?
18:15
gbaman: to a shell?
18:15
<gbaman>
i have uncommented SCREEN_02=shell but when holding ctrl+alt+2 i dont get a shell
18:15
<vagrantc>
so where did you run ssh user@server from?
18:15
<gbaman>
i havent yet
18:15
was going to run it from the client
18:15
<vagrantc>
11:13 < gbaman> when i enter the correct username it also says permanently adding host etc then the correct IP
18:15
??
18:16
LDM says that?
18:16
<gbaman>
it gets that far yes, then thinks a bit, then restarts LDM
18:16
yes
18:16
LDM says that
18:16
<vagrantc>
gbaman: did you restart your client after changing lts.conf?
18:16
<gbaman>
yes, a number of times
18:17
changed that a few hours ago
18:17
<vagrantc>
and SCREEN_02=shell isn't working?
18:17
<gbaman>
nope
18:17
<vagrantc>
then it sounds like it's not reading your lts.conf
18:17
<gbaman>
i have a shell on screen 1, but it isnt accepting any usernames
18:17
and then LDM on 7
18:17
<vagrantc>
you have a getty login on screen 1...
18:18
<gbaman>
getty?
18:19
i have a login prompt
18:19
<vagrantc>
the program that presents the login prompt
18:19
it is named getty
18:19
<gbaman>
ltsp167 login:
18:19
<vagrantc>
yes, that
18:19
<gbaman>
ah, never knew that
18:19
<vagrantc>
well, there are others, but that's an oldish, common one
18:19
<gbaman>
login details dont work
18:19
<vagrantc>
gbaman: anyways, you should shave the yak of why your lts.conf isn't respected
18:20
it's a local login, not connected to the server
18:20
so that's expected
18:20
<gbaman>
ok, i will go enable the root user on the chroot and reboot it
18:20
<vagrantc>
no.
18:20
<gbaman>
?
18:20
<vagrantc>
figure out your lts.conf problem
18:20
which files are you editing?
18:21
when you say you uncomment SCREEN_02=shell, which file did you edit?
18:21
<gbaman>
"/var/lib/tftpboot/ltsp/armhf/lts.conf"
18:22
<vagrantc>
are you using dnsmasq for dhcp?
18:22
<gbaman>
no
18:22
didn't set up a DHCP server this time
18:22
<vagrantc>
what dhcp server are you using, and what files does it tell your client to download?
18:22
<gbaman>
using one on a windows server
18:22
I cant modify it though
18:23
<vagrantc>
well, that's your problem
18:23
<gbaman>
it was though working
18:23
so that can't be the problem
18:23
<vagrantc>
and you're loading the kernel off of SD card?
18:23
<gbaman>
yes
18:23
<vagrantc>
can't be the problem, eh?
18:23
<gbaman>
I have 2 folders and I can switch between them and it works
18:23
<vagrantc>
i'll let you figure it out for yourself, then.
18:24
<gbaman>
:(
18:24
ok, i will go and set up the proxyDHCP again
18:25
<vagrantc>
proxydhcp won't work for the pi
18:26
basically, you need your DHCP server to tell it which lts.conf to download
18:26
alternately, since you're using NFS, just edit /opt/ltsp/armhf/etc/lts.conf directly, instead of from the tftp dir.
18:26* vagrantc goes back too work
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18:30
<gbaman>
wait a sec vagrantc, it has to be reading the config file....
18:30
as the thing is loading as a fat client
18:31
<vagrantc>
they have 512MB of ram?
18:31
then it'll autodetect fatclient
18:32
typically
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18:34
<gbaman>
is there a command to force it to be a thin client?
18:35
<lifeboy>
Ok, I think I've got NBD server set up to run in the old style with the "oldstyle = true" option and "port=2002", I get an X logon prompt, the logon does not succeed :(
18:39
<gbaman>
why is nothing ever easy with linux...
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18:40
<vagrantc>
try booting an rpi over the network with windows, and it'll seem mighty easy.
18:40
by comparison
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18:41
<gbaman>
:)
18:41
ha ha ha, very funny vagrantc
18:41
ok, just swapped over to an older very of my armhf chroot, and it loaded and logged in fine...
18:41
*version
18:43
how do you force thin client?
18:44
<vagrantc>
LTSP_FATCLIENT=false
18:44
or is it just FATCLIENT?
18:46
<lifeboy>
Re the logon that fails, I have http://pastebin.com/n62CXKLs the logs. vagrantc or anyone: Could you see what may cause this?
18:47* vagrantc really needs to check out of #ltsp for a few hours
18:47
<vagrantc>
hopefully sommeone else can help
18:48* lifeboy hopes so too... so close and yet so far... will trawl the interwebs some more to see what comes up
18:48
<vagrantc>
typically it's issues with ltsp-update-sshkeys
18:52
<gbaman>
vagrantc how important is indentation in the lts.conf file?
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18:53
<lifeboy>
I see in the chroot logs that it complains that the key has changed. What is the order in which ltsp-update-client, ltsp-update-sshkeys, ltsp-update-kernels are run?
18:54
<vagrantc>
gbaman: not at all
18:54
<lifeboy>
key = sshkey
18:54
<vagrantc>
lifeboy: ltsp-update-sshkeys ; ltsp-update-image
18:54
if you'er using NBD
18:54
<gbaman>
because you are right, none of them seem to be reading the config file
18:54
<vagrantc>
you don't need ltsp-update-image at all with NFS
18:54
<lifeboy>
Ah, I didn't update the image after running ltsp-update-sshkeys
18:55
<gbaman>
maybe it is time to start over again
18:56
i also just noticed on the pi is error: socket failed : connection refused
18:56
it continues on fine
18:56
<vagrantc>
probably making an NBD reqest for swap
18:56
<gbaman>
is it important?
19:00
well, i am baffled by LTSP, it does seem to be ignoring the config file, but I dont get it, it didnt ignore it at the start on this machine as it booted as a thin client
19:01
<vagrantc>
did it try to download the i386 config file?
19:01
also, log into the thin client itself, and see what's in /etc/lts.conf vs. /opt/ltsp/armhf/etc/lts.conf on the server
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19:33
<lifeboy>
Still can't log in and can't get the sshkey prompt (which times out in the script and restarts because it doesn't get a "yes/no" response) to go away. I have run ltsp-update-sshkeys and then ltsp-update-image...
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19:36
<gbaman>
well not vagrantc
19:36
*now
19:36
we might be in luck
19:37
i edited /opt/ltsp/armhf/etc/lts.conf and added LTSP_FATCLIENT=false
19:37
and it loaded up as a fat client
19:37
<lifeboy>
vagrantc, is there some project planned/under way to update the documentation for ltsp. There are so many questions being asked that would be really good in documentation or a wiki?
19:39
<gbaman>
everyone knows lifeboy a developers least enjoyable thing is writing documentation :)
19:40
<lifeboy>
But gbaman, that doesn't mean someone can't work on it, or at least formalise it, as long as the devs drop some notes somewhere and are involved in the process. Or is that wishfull thinking? ;-)
19:41
I see there are many pages that were created by the devs, but they're just old...
19:42
<gbaman>
many pages spread over the internet over multiple wikis
19:43
i do agree, the documentation for LTSP is quite poor, you need to find an LTSP expert to be able to do anything complicated
19:43
like... LTSP boot a raspberry pi as a fat client :)
19:43
<lifeboy>
And it think is must be wasting a lot of good time from the devs!
19:44
<gbaman>
vagrantc! I have a shell!
19:44
ha ha!
19:44
now what
19:44
:)
19:46
seems it was ignoring the config file in the tftp section
19:48
and i am able to ssh into the server from that shell
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20:00
<vagrantc>
gbaman: does it prompt you for anything other than the password? does it output any warnings or anything?
20:01
<gbaman>
it does not prompt me for a password, i had a root account already created on that chroot
20:01
interestingly though it does not ask for a password...
20:01
<vagrantc>
hrm?
20:01
when you ssh?
20:02
SCREEN_02=shell just drops you into a shell without need of a password
20:02
<gbaman>
yes
20:02
<vagrantc>
i.e. don't use it on production environments
20:02
<gbaman>
lol
20:02
yes
20:02
when i hit ctrl+alt+2, i get presented with root@ltsp167:/#
20:02
<vagrantc>
good good
20:03
and if you: ssh $user@server
20:03
?
20:03
<gbaman>
work
20:03
s
20:03
<vagrantc>
any warnings?
20:03
<gbaman>
nope
20:03
<vagrantc>
asks for a password?
20:03
<gbaman>
yes
20:03
<vagrantc>
tail -F /var/log/ldm.log
20:03
<gbaman>
one sec
20:03
<vagrantc>
and then ctrl-alt-f7 and log via LDM
20:04
then ctrl-alt-f2 and see what it says
20:04
<gbaman>
will take a min, rebooting the client. I have been trying to retrace my steps from an old backup
20:05
i found a script for installing all the raspberry pi software
20:05
so took out the important bits and ran it
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20:05
<gbaman>
so was going through it line by line testing each time
20:08
https://dl.dropboxusercontent.com/u/1122948/temp/Photo%2023-05-2013%2021%2007%2032.jpg
20:10
vagrantc you may want to check the install script in case that helps
20:10
https://dl.dropboxusercontent.com/u/1122948/pi/ltsppiscript1.sh
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20:11
<gbaman>
seeing as it worked before running the script and not after
20:16
the ltsp really does not build a client with very much, sudo not included, wget not included, nano not included
20:17
<vagrantc>
yup.
20:17
<gbaman>
so, any ideas vagrantc?
20:17
<vagrantc>
there's no reason to have any of those on an actual thin client
20:17
and they're easy enough to install if you need them
20:17
<gbaman>
well, i guess you are right
20:18
<vagrantc>
gbaman: haven't really had a chance to take a llook
20:18
<gbaman>
ok
20:18
well, the script will have been missing bits out as it does not have sed
20:18
by default installed
20:19
I will rerun the script now with sed installed
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20:27
<gbaman>
it seems to be having a lot of trouble setting up ca-certificates
20:27
E: Could not open file /tmp/ca-certificates.template.53960 - open (2: No such file or directory)
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21:56
<free_>
someone can help me with sound within ubuntu ltsp?
21:57
<Hyperbyte>
!ask
21:57
<ltsp>
ask: Don't ask to ask a question, simply ask it, and if someone knows the answer, they'll respond. Please hang around for at least a full hour after asking a question, as not everybody constantly monitors the channel.
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22:02
<free2>
MB AD525PV3, Audio Realtek Chip ALC622 within Intel sound hda board. I have sound when booting with Ubuntu Desktop 64-bits 12.04, but doesn´t have any sound when booting by LTSP. lts.conf is
22:02
[Default] LOCALDEV = True SOUND = True LDM_DIRECTX = True
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22:22
<lifeboy>
I'm still not able to login form a thin client using the ldm logon prompt. If I logon from SCREEN_08 (where root is logged in already due to SCREEN_08=shell in lts.conf) using ssh 192.168.8.100, I can answer "yes" and login. Then the LDM login also works. But after restarting the thin client, the problem is the same again. How do I tell the chroot to be happy with my ssh key?
22:23
s/login form/login from/
22:24
<Hyperbyte>
lifeboy, good job on being specific! Most people leave out this small detail: you had to answer 'yes' and login.
22:25
There's your problem. If your SSH keys from server are not configured in the client, or if they are invalid (for example, because the IP address of the server has changed), you have to verify the SSH keys by answering 'yes'.
22:25
<lifeboy>
free2, do you have the sound driver available in your chroot? If I remember correctly the sound will not work unless the bootimage that the LTSP clients starts with has the sound driver correctly configured.
22:25
<Hyperbyte>
However, LDM does not answer 'yes' for you, since LTSP configures the SSH keys correctly. If your IP has changed, you need to tell LTSP to re-configure the SSH keys.
22:25
<vagrantc>
by default, recent versions of ldm don't bother to verify the ip address
22:25
<Hyperbyte>
!update-sshkeys
22:25
<ltsp>
I do not know about 'update-sshkeys', but I do know about these similar topics: 'ltsp-update-sshkeys'
22:26
<Hyperbyte>
!ltsp-update-sshkeys
22:26
<ltsp>
ltsp-update-sshkeys: If you changed your server IP, you need to run ltsp-update-sshkeys, and if you're using NBD (Ubuntu) you also need ltsp-update-image afterwards
22:26
<lifeboy>
I do ltsp-update-sshkeys, but it doens't fix the problem
22:26
I have to state though:
22:26
The server runs Ubuntu 12.04 and the clients are 10.04
22:27
<Hyperbyte>
That might be related. Either way, it's ssh key problem.
22:27
I need sleep. :)
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22:27
<Hyperbyte>
(as long as you have to answer 'yes' while ssh'ing, ldm won't work)
22:28
<lifeboy>
hehe, so do I, but I need to fix this. Yeh, I have seen this for an hour or more, but can't get it fixed.
22:28
Maybe I can remove manually paste the key into the chroot?
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22:28
<lifeboy>
into the ssh keyfile that is
22:29
<Hyperbyte>
1. Create backup
22:29
2. Try
22:29
G'night. :)
22:29
<lifeboy>
:) Will do, thanks, G'night
22:31
<vagrantc>
lifeboy: that will work until whatever's broken it breaks it again
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22:49
<lifeboy>
Yes, I guess it will.
22:52
just had look throught the script in ltsp-update-sshkeys and it looks pretty straightforward to me.
22:53
I sse alkisg was the last person to update it. Maybe he knows?
22:53
<vagrantc>
well, it's not putting the correct key into the file?
22:54
<lifeboy>
I'll go through the files and script manually and see what it does.
22:54
<vagrantc>
lifeboy: sh -x /usr/sbin/ltsp-update-sshkeys
22:54
will be a good deal more verbose ... maybe too noisy
22:56
<lifeboy>
maybe a good idea. Let me see
23:10
This is becoming weird: There is a dsa, ecdsa & rsa host pub key on my server and all three those keys are in the /etc/ssh/ssh_known_hosts file in the chroot.
23:10
I just installed openssh-server into the chroot and added a user to be able to log into the booted chroot...
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23:21
<lifeboy>
When I try to log into the booted chroot with "ssh -v 192.168.8.147" I get (at the end): debug1: SSH2_MSG_KEXINIT sent, which apparently is some kind of key error, which confirms what I already know. But the text of the keys match??
23:29
<vagrantc>
lifeboy: the format of /etc/ssh/ssh_host*.pub and /opt/ltsp/*/etc/ssh/ssh_known_hosts is a bit different
23:29
lifeboy: do the lines in ssh_known_hosts begin with "server ssh-rsa ....."
23:29
lifeboy: and is "server" what LDM's trying to log in to?
23:30
<lifeboy>
Yes, I did take that into account
23:31
<vagrantc>
lifeboy: from the thin client, delete /etc/ssh/ssh_known_hosts, ssh $user@server
23:31
what do you end up with in /root/.ssh/known_hosts ?
23:31
oh, it'll probably be hashed... that won't be real useful...
23:32
<lifeboy>
At the moment I can't log into the client, X is broken, so I'll just disable it first... gimme a moment.
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23:55
<lifeboy>
I think I may have a bad chroot. One I log in, I can't sudo although I have all the correct right, my home dir is not there and all sort of other strange things. I'm built a new lucid chroot and will test with that again.
23:55
s/One/Once/
23:56
s/built/building/
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