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


Channel log from 3 November 2011   (all times are UTC)

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01:46
<cliebow_>
hiho jammcq
01:52
<jammcq>
hey cliebow_
01:53
<lifeboy>
Anyone awake here?
01:53
<cliebow_>
nice to see you here..not hthe same without you
01:53
been real quiet..Gadi still looks live
01:53
<jammcq>
yeah, I try to pop in when I can
01:54
also I was checking if sbalneav was in yet. I dropped him at the airport around 2pm
01:54
he should be arriving home about now
01:54
<cliebow_>
me too..ohhh airport
01:55
<lifeboy>
Booting LTSP with PXE using NFS, I get an error:
01:55
/scripts/nfs-bottom/ltsp: line 47: can't create /root/etc/hostname: Read-only file system
01:55
<cliebow_>
im still trying to get a handle on the changes coming..seems tied to sshpam auth
01:55
<lifeboy>
and then
01:55
init: hostname main process (1039) terminated with status 1
01:56
Anyone know what's causing this?
01:56
Gadi: you still around?
01:56
<jammcq>
lifeboy: sorry, it's way beyond my current knowledge of ltsp
01:56
<cliebow_>
lifeboy, pretty late here
01:56
<lifeboy>
Here too, 4am...
01:57
No rest for the wicked... :D
01:57
<cliebow_>
wow..worked all night ..again
02:00
i cant pretend to know how to help..i can only ask at what stage you see this error..
02:04
<lifeboy>
It's in line 47 of /usr/share/initramfs-tools/scripts/nfs-bottom/ltsp which is:
02:04
cat /proc/sys/kernel/hostname > ${rootmnt}/etc/hostname || true
02:05
I think {rootmnt} is readonly, but I can't find anything via google that says what I should do
02:05
to fix that
02:05
I don't even know what {rootmnt}'s value is once the client has booted
02:06
But I do know where the coffee is in my kitchen. I'll be back...
02:06
<cliebow_>
so cant write the hostname..must be root..like before a switchroot?
02:06
<lifeboy>
It says before that in the console: Begin: Running scripts/nfs-bottom ...
02:07
and a few lines up: Mounting root file system ...
02:08
<cliebow_>
i cant tell whether you are in the initramfs and the nbd filesystem hasnt mounted...
02:08
<lifeboy>
The fact that it says in the error: "can't create /root/etc/hostname" means it attempted to mount /root, but it's readonly and shouldn't be
02:09
I'm not using NBD... long story
02:10
<cliebow_>
sorry.. i am blowing smoke from memory..oh..nfs
02:10
sure nfs is set up rw?
02:10
<lifeboy>
that's why nfs-bottom is being run
02:10
<cliebow_>
God it has been so long
02:11
Well the serve has to be set up rw for nfs
02:11
<lifeboy>
I followed the instructions at https://help.ubuntu.com/community/UbuntuLTSP/LTSPWithoutNFS
02:12
and that says I should have /etc/export
02:12
/opt/ltsp/i386 *(ro,no_subtree_check,no_root_squash)
02:12
Let me change that to rw
02:13
<cliebow_>
this looks ancient...primrdial even
02:14
<lifeboy>
You're not that old... ;-)
02:14
I restarted nfs-kernel-server after making it rw, but it still give the same error
02:14
<cliebow_>
heh..the document..
02:16
i can look at my Sanscrit configs at school tomorrow..nfs can be an odd duck..stale mounts and stuff
02:19
i guess originally /opt/ltsp/i386 was set to ro..so everyone wouldnt write all over the servers filesystem..
02:19
i am shutting up..s my memory is as stale as the doc you are working from
02:20
<lifeboy>
I'm checking to see if I can find something for 10.04 specifically
02:23
<cliebow_>
get some sleep!! see ya
02:26
<lifeboy>
cheers
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03:46
<miks>
Hey everyone, I could use some help getting thin clients to shut down on Edubuntu 11.10
03:47
I'd like to get automated shutdown working, AND give them a button the desktop to shutdown, if possible. I'd settle for EITHER at the moment
03:47
I set CRON up in the chroot and tried to do it that way, but nothing happened at the appointed time.
03:49
I then used the sample ltsp-shutdown.desktop file recommended the other day, but when I run it nothing happens. I tried it from a terminal, and got the result "command not found"
03:50
Can anyone point me in the right direction, or tell me how to troubleshoot?
03:51
Frustratingly enough, I don't even have a "Shut down" option in the menu on the thin client. Only "logout"
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05:21
<bakytn>
Hey! Currently I have couple of LTSP clients running through rdesktop. If I run ltsp-update-image. Would I break their work?
05:24
btw, I am also getting: "kernel: FAT: bogus number of reserved sectors" when ThinClient is booting up. This never happened before..
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08:15
<bakytn>
Hello! Is there any way to provide use USB Flash Printers as a local ones via RDP. Unfortunately only a few printers support JetDirect
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09:21
<lifeboy>
Hi all!
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09:23
<lifeboy>
Is there anyone here that knows how to use NFS for a thin client rather than NBD that can help me troubleshoot a readonly root mount issue?
09:25
The US is still sleeping...
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09:58* bakytn I wonder if it should be read only normally
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10:30
<lifeboy>
lifeboy 03/11/2011 11:23:04
10:30
Is there anyone here that knows how to use NFS for a thin client rather than NBD that can help me troubleshoot a readonly root mount issue?
10:31
<alkisg>
https://help.ubuntu.com/community/UbuntuLTSP/LTSPWithoutNFS
10:40
<lifeboy>
alkisg: If it was that simple, I would had this sorted out last week already!
10:41
<alkisg>
I'm not sure I understand, do you mean it's difficult to switch from nbd to nfs?
10:42
<lifeboy>
No, I've got NFS all in place (as per that how to), but the root file system get's mounted as read only, preventing the client startup process from continuing
10:43
<alkisg>
lifeboy: nbd is supposed to be mounted read-only
10:43
Then aufs + tmpfs are used to get a writeable root
10:43
As Gadi said yesterday, you're probably not using the ltsp_nbd script?
10:44
<lifeboy>
I can confidently say I have explored all the commonly documented options :-(
10:45
<alkisg>
Erm, can you paste your pxelinux.cfg/default ?
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10:46
<lifeboy>
default ltsp
10:46
label ltsp
10:46
kernel vmlinuz
10:46
i# append ro initrd=initrd.img nbdsrv=172.16.0.1 nbdport=2000 nbdroot=/dev/nbd
10:46
append ro initrd=initrd.img boot=nfs nfsroot=/opt/ltsp/i386
10:47
sorry, the 4th line is commented out. (not starting with an i)
10:47
<alkisg>
lifeboy: ah ok I thought you were still trying NBD
10:48
I'm not very familiar with the required nfs command line
10:48
<lifeboy>
The problem with NBD is this:
10:48
I can't compile the r6040 module under Ubuntu 10.04
10:49
If I use the vortex86 kernel, I have r6040 already in there, but NBD seems to be the upstream version, not the Ubuntu one
10:49
And I can't figure out how to setup that NBD
10:49
<alkisg>
You misunderstood
10:49
"but NBD seems to be the upstream version, not the Ubuntu one"
10:49
we don't have a special nbd module in ltsp
10:49
We're using the upstream one
10:50
But
10:50
<lifeboy>
Ah, that explains why the sources are the same...
10:50
<alkisg>
We do have an initramfs script to load the module
10:50
That initramfs script is called ltsp_nbd
10:50
What Gadi was telling you yesterday is that instead of using the ltsp_nbd script on pxelinux.cfg/default, you're using the upstream "nbd" script
10:51
That's just a small configuration change
10:51
<lifeboy>
I have ltsp_nbd. So should I copy that into the vortex client?
10:51
<alkisg>
Let me say some theory again
10:52
<lifeboy>
Please
10:52
<alkisg>
ltsp_nbd is installed with ltsp-client in the chroot
10:52
So "I have ltsp_nbd. So should I copy that into the vortex client?" => doesn't make sense
10:52
It should already be there in the vortex client
10:52
Unless you used some weird method to generate the chroot
10:53
Now, there are some scripts called "initramfs hooks"
10:53
Those hooks run when you run `update-initramfs -u` inside the chroot
10:53
And these hooks make sure that the nbd module and the ltsp_nbd script are copied inside the initramfs
10:53
So
10:53
Even if you're using a custom kernel, your initramfs should automatically be ltsp-ready
10:54
That means that you're using some weird method somewhere, preventing ltsp from copying the necessary stuff to the initramfs
10:54
So, what exactly are you doing, so that we can pinpoint the problem in your method?
10:54
<lifeboy>
the only way I know to get the vortex chroot is to make a directory and copy the extracted archive into it. Then I check everything manually.
10:55
<alkisg>
The shouldn't even be a "vortex chroot" concept
10:55
vortex kernel, ok
10:55
But vorted chroot, or vorted initrd, no
10:56
<lifeboy>
So what do I call the client setup in /opt/ltsp/i386 ?
10:56
<alkisg>
So, start from "I have an ltsp chroot at /opt/ltsp/i386, and a vorted kernel at /somedir/vmlinuz"
10:56
And mention the steps you take to put the vortex kernel in the ltsp chroot
10:56
<lifeboy>
Ok, let me go through it all step by step.
10:57
<alkisg>
Before you start
10:58
You're actually using a chroot generated by ltsp-build-client, right?
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11:30
<lifeboy>
alkisg: I'm building a new chroot with that yes.
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12:00
<lifeboy>
alkisg: Once the ltsp-build-client is complete, I add the some apt configs to make sources available and enable apt-cacher proxy to the chroot
12:00
<alkisg>
lifeboy: no need
12:00
You've already compiled your module, right?
12:01
Just put your kernel + the module in the stock ltsp chroot
12:01
And run update-initramfs -u in the chroot and ltsp-update-kernels/ltsp-update-image outside it
12:01
<lifeboy>
alkisg: No, I haven't, but I don't need to, since the vortex sources have it.
12:01
<alkisg>
lifeboy: I mean, you don't need to compile again since you compiled the previous time
12:02
So no need to go though kernel compilation again
12:02
Just copy the result that you have from your last try
12:02
<lifeboy>
Yes, I understand
12:02
<alkisg>
But anyway if you feel better recompiling, np, do so
12:03
Also you don't need apt-cacher
12:03
<lifeboy>
I'll first try the previously build kernel
12:03
<alkisg>
There's a "mount package cache" option that reuses the package cache from your server
12:03
Both in ltsp-build-client and in ltsp-chroot
12:03
<lifeboy>
I know I don't, but I don't want to waster bandwidth when I update the chroot now or later
12:03
waster = waste
12:04
<alkisg>
Yes, I'm telling you of an easier method to not waste bandwidth
12:04
<lifeboy>
But if the server is 10.10 64bit, if won't help, will it?
12:05
<alkisg>
It will do the same thing apt-cacher does, but without using apt-cacher
12:05
OK anyway details, go on...
12:05* alkisg also goes back to programming epoptes...
12:06
<lifeboy>
Ok, ltsp-build-client is complete
12:27
now I copied: linux-image-2.6.34.1-vortex86-sg_1.0_i386 to /opt/ltsp/i386/usr/src
12:27
then ltsp-chroot --arch=i386
12:28
and mount -t proc proc /proc
12:28
<pscheie>
good morning all
12:28
<lifeboy>
apt-get install gcc
12:29
I ave recompile the vortex kernel... I cleaned up the old stuff last night :-(
12:30
typo... I have to recompile...
12:33
copied .config for vortex kernel to /usr/src/linux-image-2.6.34.1-vortex86-sg_1.0_i386
12:34
<alkisg>
Good morning pscheie
12:34
<pscheie>
good morning alkisg. Are you still in Orlando?
12:34
<alkisg>
pscheie: so are those lsb/init-functions available in some package?
12:34
Yup
12:35
If so, I can always use them, and just have the centos/fedora package depend on that lsb package...
12:36
<pscheie>
There is the redhat-lsb package which probably will do what you want, and you could just make that a dependency on Centos.
12:36
Let me install it just to make sure it's got what you need.
12:37
<alkisg>
script = /lib/lsb/init-functions, functions = log_begin_msg, log_warning_msg, log_end_msg
12:38
<lifeboy>
linux-image-2.6.34.1-vortex86-sg_1.0_i386 was the wrong one, the correct one is linux-2.6.34.1-vortex86-sg
12:40
<pscheie>
/lib/lsb-init-functions has a log_warning.msg, but no log_begin_msg nor log_end_msg :-(
12:40
It says it's LSB spec 1.1.0, fwiw.
12:40
<alkisg>
:(
12:41
<pscheie>
http://pastebin.ubuntu.com/727217/
12:41
It's a small file.
12:42
<lifeboy>
apt-get install fakeroot kernel-wedge build-essential makedumpfile kernel-package libncurses5 libncurses5-dev
12:43
<alkisg>
pscheie: so I'd better just use the alias hack we used at the BTS :)
12:43
<pscheie>
Yes, I think you'll have to roll your own.
12:44
<lifeboy>
make ARCH=i386 menuconfi
12:44
make ARCH=i386 menuconfig
12:45
and add -nbd to the localversion and enable NBD support
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12:46
<lifeboy>
make-kpkg clean
12:49
time fakeroot make-kpkg --initrd kernel-image kernel-headers
12:50
This will give me kernel with NBD and r6040 compiled in without requiring modules
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13:03
<lifeboy>
Ok, compile is done.
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13:05
<lifeboy>
alkisg: I now have a linux-image-....deb after the compile. Do Install that in the chroot, or do I extract that somewhere and only copy the kernel to /boot?
13:05
I meant "Do I install..."
13:06
<alkisg>
Install it
13:07
<lifeboy>
Ok.
13:09
alkisg: There an image and a header .deb. I only install the image, right?
13:09
dpkg -i linux-image-2.6.34.1-vortex86-sg-nbd_2.6.34.1-vortex86-sg-nbd-10.00.Custom_i386.deb
13:09
<alkisg>
Right, unless you also want to compile something else in the chroot, like e.g. the nvidia proprietary drivers
13:10
<lifeboy>
ok, done.
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13:15
<lifeboy>
alkisg: what's the command again that links vmlinuz et al to the correct source file? It currently links to the other kernel
13:15
<alkisg>
lifeboy: there's no need to do that
13:15
<lifeboy>
Not?
13:16
<alkisg>
You mean to link $CHROOT/vmlinuz, right?
13:16
<lifeboy>
yes
13:16
<alkisg>
No, that's not used. Whatever you put to pxelinux.cfg/default is used
13:16
Also, if the kernel you installed is newer than the one you had, that symlink should automatically be generated
13:16
Unless vortex has a broken package
13:18
<lifeboy>
It still has vmlinuz -> vmlinuz-2.6.32-34-generic
13:18
not vmlinuz-2.6.34.1-vortex86-sg-nbd
13:18
<alkisg>
OK. Anyway ignore that
13:18
<lifeboy>
Ok
13:19
Is there anything else I need to do before I edit pxelinux.cfg/default?
13:21
<alkisg>
Put the output of the installation to pastebin
13:21
dpkg -i linux-imageetc
13:21
To see if the triggers were executed, the initramfs updated etc
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13:29
<lifeboy>
update-initramfs -c -k 2.6.34.1-vortex86-sg-nbd
13:30
<alkisg>
I didn't say to run a command
13:30
I just asked to paste the output of the commands you already ran
13:30
You shouldn't have to run update-initramfs manually, it should happen automatically
13:33
<lifeboy>
one sec
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13:43
<lifeboy>
alkisg: sorry, phonecall...
13:43
<alkisg>
np I'm not watching the channel anyway, still programming... :)
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13:51
<lifeboy>
alkisg: http://pastebin.com/qKmaxumS
13:51
alkisg: Sorry about that, I didn't realise that was meant for me
13:53
alkisg: btw, I'm really looking forward to trying out epoptes in a business environment for remote support to ltsp users desktops
13:54
<alkisg>
An edubuntu session starts in 5 minutes, bbl..
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15:19
<lifeboy>
alkisg: When you get back, I have put everything I did after compiling into here: http://pastebin.com/FxUzQbPY
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15:21
<alkisg>
lifeboy: and what happens now if you try to boot the client?
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15:28
<lifeboy>
I get the error that I had yesterday: "No Init found. Try passing init= bootarg"
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15:41
<alkisg>
lifeboy: put your /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default to pastebin
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16:07
<lifeboy>
I'm back. Here it is http://pastebin.com/eWzWnPth
16:08
alkisg: I edited that to reflect the actual filenams to be used
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16:09
<alkisg>
lifeboy: it seems that the chroot kernel hooks didn't execute, because the vortex package is semi-broken, you need to call them manually
16:09
Those hooks update the initramfs, put ltsp_nbd in it etc
16:09
Update the vmlinuz symlink...
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16:10
<alkisg>
/etc/kernel/postinst.d/ltsp-update-kernels
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16:13
<lifeboy>
alkisg: This file is empty
16:13
<alkisg>
lifeboy: you mean that you don't have that script in your chroot?
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16:13
<alkisg>
It's part of ltsp-client-core, if you don't have it then you don't have ltsp
16:13
<lifeboy>
in the chroot (/opt/ltsp/i386) right?
16:13
<alkisg>
Yes
16:14
What's the output of this command?
16:14
sudo chroot /opt/ltsp/i386 dpkg -l ltsp-client
16:14
<lifeboy>
The file is there, but it contains nothing. Unless the dpkg -i overwrote it?
16:16
<alkisg>
If you don't have ltsp-client installed, *don't install it now*.
16:16
Do you?
16:16
<lifeboy>
dpkg -l ltsp-client
16:16
Desired=Unknown/Install/Remove/Purge/Hold
16:16
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend
16:16
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
16:16
||/ Name Version Description
16:16
+++-==========================================-==========================================-====================================================================================================
16:16
ii ltsp-client 5.2.1-0ubuntu9 LTSP client environment
16:16
huh? Surely lstp-build-client should have done that?
16:19
<alkisg>
No, no package is supposed to overwrite scripts with empty files
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16:19
<alkisg>
I can only assume that the vortex kernel package is so horribly broken that it deletes other packages's scripts in case they won't work with that kernel...
16:20
Try restoring the missing script + running it
16:21
<lifeboy>
Just checked the image.deb and it does contain the /etc/kernel/* directories, but not files in there, so this is not the case it seems to me
16:21
<alkisg>
lifeboy: ah, maybe you didn't follow the symlink correctly
16:21
Did you try to check that file from within the chroot, or from outside the chroot?
16:21
$ ls -lha /opt/ltsp/i386/etc/kernel/postinst.d/ltsp-update-kernels
16:21
lrwxrwxrwx 1 root root 30 2011-09-01 08:48 /opt/ltsp/i386/etc/kernel/postinst.d/ltsp-update-kernels -> /usr/share/ltsp/update-kernels
16:22
It's a symlink, so you're supposed to run it from within the chroot, not open it from outside...
16:23
<lifeboy>
Ah, yes, I see the link is to /usr/share/ltsp/update-kernels, which does exist
16:23
in the chroot
16:24
<alkisg>
lifeboy: and maybe the main problem was that when you installed the kernel, you didn't have /proc mounted
16:24
Did you?
16:25
<lifeboy>
No it did have it mounted. Let me check my history
16:25
<alkisg>
So anyway chroot, mount /proc, and run that postinst kernels hook
16:28
<lifeboy>
Here's my history http://pastebin.com/Qy8HxFSw
16:29
Ok
16:30
run /etc/kernel/postinst.d/ltsp-update-kernels?
16:31
<alkisg>
Yes, in the chroot, with /proc mounted
16:31
And put the output to pastebin
16:31
And check if it fixed the /boot/vmlinuz symlink
16:32
<lifeboy>
/usr/share/ltsp/update-kernels run, the previous one (the symlink) does nothing
16:32
<alkisg>
....are you sure you're inside the chroot?
16:32
Both of them should be the same file
16:32
<lifeboy>
Yes. Only three lines
16:32
Skipping yaboot configuration. install yaboot package if you need it.
16:32
Skipping netabootwrap images. Install the aboot package if you need them.
16:32
Skipping sparc piggyback images. Install the sparc-utils package if you need them.
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16:34
<alkisg>
(06:31:48 μμ) alkisg: And check if it fixed the /boot/vmlinuz symlink
16:34
<lifeboy>
Yes, the links are correct and the the pxelinux.cfg/default is correct as well
16:35
<alkisg>
OK, now within the chroot again, run: update-initramfs -u
16:35
<lifeboy>
update-initramfs: Generating /boot/initrd.img-2.6.34.1-vortex86-sg-nbd
16:36
<alkisg>
After that unmount proc and exit the chroot
16:36
<lifeboy>
ok
16:36
ltsp-update-image and first and then ltsp-update-kernels?
16:37
<alkisg>
Not yet
16:37
Do these:
16:37
(outside the chroot)
16:37
<lifeboy>
ok
16:37
<alkisg>
mkdir /tmp/init-vortex
16:37
cd /tmp/init-vortex/
16:37
gunzip -c /opt/ltsp/i386/boot/initrd | cpio -i -d -H newc --no-absolute-filenames
16:37
ls -lha -R
16:38
And put the result to pastebin
16:38
With that, we'll check that all the files got indeed inside your initramfs
16:38
Sorry I forgot an .img extension
16:38
gunzip -c /opt/ltsp/i386/boot/initrd.img | cpio -i -d -H newc --no-absolute-filenames
16:41
<lifeboy>
http://pastebin.com/K5H93dtY
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16:45
<alkisg>
lifeboy: I don't see nbd.ko in it, is it compiled into the kernel?
16:47
But anyway, continue with the update-image + kernel
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16:50
<lifeboy>
Yes. I said 'y' instead of 'm'
16:50
<alkisg>
OK, continue with the update-image + kernel + reboot client, bbl..
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16:57
<lifeboy>
alkisg: I still get the same error! "No init found. Try passing init= bootarg."
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17:42
<alkisg>
lifeboy: do you get an initramfs shell after that?
17:43
<lifeboy>
yes
17:44
<alkisg>
lifeboy: there, try: ls /dev/nbd*
17:44
Do you see the nbd devices?
17:45
<lifeboy>
yes
17:45
<alkisg>
OK, try: nbd-client server-ip 2000 /dev/nbd0
17:45
<lifeboy>
/dev/nbd0 to /dev/nbd15
17:46
<alkisg>
Output?
17:46
<lifeboy>
Error: Cannot open NBD: No such file or directory
17:46
oh, wait
17:47
I typed dbd0 instead of nbd0
17:47
Now:
17:48
Negotiation: ..size = 1235132KB bs=1024, sz=1235132
17:49
<alkisg>
OK, now: mount -o loop /dev/nbd0 /mnt
17:49
Or something similar, you may not have /mnt already so you'd need to create it
17:50
And another command: echo $BOOT
17:51
<lifeboy>
mount is successful after creating /mnt
17:51
$BOOT = ltsp_nbd
17:51
<alkisg>
ls -l /mnt init
17:51
err sbin/init
17:51
ls -l /mnt/sbin/init
17:52
Ahh you're in 10.04 so you're probably using nbd-proxy by default, that could be a problem as well...
17:53
<lifeboy>
SQUASHFS error: unable to read metadata cache entry [4b6141a5]
17:53
<alkisg>
Ah
17:53
<lifeboy>
ls: /mnt/sbin/init: Input/output error
17:54
<alkisg>
Yeah, that's your problem
17:54
So nbd isn't working correctly
17:54
<lifeboy>
nbd-proxy?
17:54
<alkisg>
We tried manually now so we didn't use nbd-proxy
17:54
So no, nbd-proxy isn't your problem here, it's a problem with the nbd module not working
17:55
<lifeboy>
but pxelinux.cfg/default does have nbd_proxy=false
17:55
<alkisg>
It doesn't take effect in 10.4
17:55
You'd need to patch ltsp_nbd to make it effect
17:55
But anyway let's not talk about nbd-proxy anymore, your problem is the nbd module
17:56
Which isn't working. You succesfully mounted the server image with nbd, and you couldn't `ls` it
17:56
So either your server nbd image is broken, or nbd isn't working, or squashfs isn't working
17:56
<lifeboy>
hmm... Ik read something that somewhere... the nbd_proxy that was causing trouble
17:56
<alkisg>
Yeah but we didn't use nbd-proxy
17:57
So it's not possible for it to cause problems when we're not using
17:57
it
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17:57
<lifeboy>
I had a stgraber ppa that I install an never ltsp-client from in an earlier attempt. That won't help, will it?
17:58
It's the nbd.c in the vortex kernel, is it?
17:58
<alkisg>
(07:56:34 μμ) alkisg: So either your server nbd image is broken, or nbd isn't working, or squashfs isn't working
17:59
<lifeboy>
Can we find that out in another way or should I compare the sources with the standard ubuntu 10.04 kernel?
18:01
I have booted the standard i386 kernel via PXE from my notebook repeatedly, so I suppose that means the server is ok? Is is that a different kernel and doesn't mean anything here?
18:01
Or is that... I meant
18:01
<alkisg>
The i386 kernel with today's nbd image?
18:01
If so, then yes it would mean that your server is ok
18:02
<lifeboy>
Both with the vortex kernel, with the ubuntu 10.04 kernel
18:02
Sorry: Not with the vortex kernel, with the ubuntu 10.04 kernel
18:02
<alkisg>
Today?
18:03
<lifeboy>
No, earlier in the week
18:03
<alkisg>
Try now
18:03
<lifeboy>
Ok, gimme a sec
18:03
<alkisg>
Just modify your pxelinux.cfg to point to the 10.04 kernel
18:03
<lifeboy>
yes
18:03
<alkisg>
If that makes your laptop boot, then your server is ok
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18:25
<alkisg>
vagrantc: I pushed openssl support in epoptes
18:25
I also put a command line param in epoptes-client to fetch the certificate from the server, epoptes-client -c
18:26
(so that ssh/scp aren't required, which would make it harder for some cases)
18:26
If it's acceptable, i'd like to put a "epoptes-client -c localhost" on epoptes-client.postinst, if we're in an LTSP chroot
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18:33
<Hyperbyte>
alkisg, you rock1
18:33
!
18:33
<vagrantc>
alkisg: tested it last night, thouggh couldn't get vnc connections to work
18:33
<alkisg>
Hyperbyte: let's hope it also works :)
18:34
<vagrantc>
found a few more dependencies, but didn't have time to commit
18:35
<alkisg>
vagrantc: I'll check if it's better to switch to remmina, if it is, no point in troubleshooting vinagre in lxde then
18:36
But afaik it worked for me, maybe some firewall?
18:36
I wonder if we should use forward vnc connections instead of reverse...
18:37
(battery end, bbl, will read logs)
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18:41
<lifeboy>
alkisg: I can boot from my notebook, although it doesn't allow me to log in, but that a different problem I suppose
18:42
So the nbd server is fine then, right?
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18:48
<lifeboy>
alkisg: I'll continue tomorrow. I was up far too long already last night. Thanks for all the help! You're really appreciated over here!
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18:59
<vagrantc>
alkisg: i'll have time to really test tomorrow... hopefully you'll be around?
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19:04
<alkisg>
Yup, tomorrow I'll be around, then I'll be travelling back
19:04* alkisg checks at remmina...
19:06
<alkisg>
Meh, 569 is a well-defined port for ms-roma, we need to change it...
19:07
<Hyperbyte>
1533
19:07
<alkisg>
No we'd better use a privileged port, < 1024
19:07
<Hyperbyte>
:(
19:07
But I like 1533!
19:07
<alkisg>
http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml
19:07
Hehe
19:08
OK then I'll put an "if hostname=hyperbyte, select 1533" in it - anyone other has some specific request? :P
19:08
<Hyperbyte>
Rather put
19:08
if hostname!=alkisg
19:08
:P
19:09
<alkisg>
virtual-places 1533 tcp Virtual Places Software [Avshalom_Houri] [Avshalom_Houri]
19:09
Sir, your port is also reserved
19:09
<Hyperbyte>
Avshalom Houri?
19:09
lol
19:10
That's the worst name I've ever heard for.... well... basically anything.
19:10
Sounds like something you order at a Turkish restaurant.
19:11
So I guess for a Turkish dish it'd be an ok name.
19:12
Ok... now I'm hungry.
19:12
<alkisg>
I hope he doesn't read the irc logs though :P
19:12
<Hyperbyte>
Avshalom Houri is a person?
19:13
And he reserved port 1533 just for himself?
19:13
<alkisg>
Service Name Port Number Transport Protocol Description Assignee Contact
19:14
www-http 80 tcp World Wide Web HTTP [Tim_Berners_Lee] [Tim_Berners_Lee]
19:15
So yeah Tim_Bernes_Lee has the whole web reserved for himself :P
19:15
<Hyperbyte>
Oh that's just contact person
19:15
I thought it was the name of some software.
19:15
For a person name it's okay too I guess! Sorry Avshalom!
19:15
<alkisg>
Nah, it's the name of the person that filed the port application
19:15* Hyperbyte hides.
19:15
<alkisg>
Haha
19:15
<Hyperbyte>
In all seriousness... I need Turkish food now.
19:15
Back later.
19:16
<alkisg>
bb
19:16
nbd 10809 tcp Linux Network Block Device [Wouter_Verhelst] [Wouter_Verhelst] 2010-08-02
19:16
Goooood Wouter :)
19:21
<vagrantc>
alkisg: there's no real reason to use a "privledged" port
19:21
alkisg: and the software needs to be able to support arbitrary ports
19:22
<alkisg>
vagrantc: suppose for some reason the service hasn't started, and a person on the thin client runs a copy of his own for the daemon
19:22
Ah.
19:22
Keys :)
19:22
We now have keys :D
19:23
Well, there's a PORT setting in the configuration files, so it supports arbitrary ports
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19:23
<alkisg>
So anyway, we'll have to provide 1 default port, so should I select a system one, or one > 1024?
19:23
E.g. 585, 659 are currently available...
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19:25
<vagrantc>
alkisg: i need to look into debian policy as to how to handle arbitrary ports not assigned by IANNA
19:25
tomorrow :)
19:26
<alkisg>
Nice
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19:29
<alkisg>
789 is unassigned, looks like a good number
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20:11
<alkisg>
Hey Rafik :)
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20:44
<Mip5>
Have any of you folks used Xexit to run scripts for thin clients?
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20:52
<Hyperbyte>
Mip5, I take it you didn't get it working via pam?
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21:09
<Mip5>
Hyperbyte: No, I've put my script there, but it hasn't worked. I'm not sure though whether my script should be a full on bash script, or just a file with the command in it (rm -rf .gnome). Thoughts?
21:14
<Gadi>
Mip5: did you actually read this? http://www.opinsys.fi/en/killing-user-processes-with-xexit-on-ltsp-servers
21:15
if you like, you can have it *only* run your script by modifying /etc/X11/Xsession.d/90xexit
21:15
so that it calls "xexit /path/to/your/script"
21:16
you should also be able to test it from command line
21:16
by running "xexit /path/to/your/script"
21:16
then check to see if xexit is running with ps
21:16
if it is, great
21:16
then logout of the thin client
21:17
and check to see if that xexit process goes away
21:17
and yeah, your script should be a chmod 755 bash script
21:17
<Mip5>
Gadi: Yes, I did read the link. I must just be missing something.
21:17
<Gadi>
:)
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21:19
<Mip5>
Gadi: Thanks - the reason I asked about the 755 bash script is because the example script in the directory is *not* executable, nor is it a bash script - rather simply command
21:19
<Gadi>
sorry. that question reads too sarcastically
21:19
:)
21:19
<Mip5>
It's all good - there's tons I don't know, and you folks are truly a wonderful resource for folks like me
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21:19
<Gadi>
I suspect that the files in xexit.d/ are sourced
21:20
but, if you actually call "xexit /script", /script should be executable
21:20
that's kind of our style in ltsp. To source .d/ directory scripts
21:21
<Mip5>
Thanks - what does "sourced" mean in your previous comment?
21:21
<Gadi>
so, I imagine that's how scotty coded xexit.d
21:21
ah
21:21
so, with shell scripts, you can source other files
21:21
like: . /my/file
21:21
<Mip5>
ok....
21:21
<Gadi>
the "." means source
21:21
which is like "include"
21:22
as opposed to "run"
21:22
every time you run a shell script from a shell script, it uses more memory
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21:22
<Gadi>
because it spawns another shell
21:22
and it also takes a little longer
21:22
but, when you include,
21:22
the computer is only using one shell
21:23
and just executing the lines it finds in those other files
21:23
<Mip5>
ah
21:23
<Gadi>
so, as long as all the files are in shell,
21:23
it is faster to source than to execute
21:23
and sourced files don't need executable permissions, because they are not executed
21:24
only "included"
21:24
the only thing that was executed was the original shell
21:24
does that make sense?
21:24* Gadi feels long-winded
21:24
<Gadi>
:D
21:24
<Mip5>
ah - so sourced files are just included lines in something that is already being executed?
21:24
<Gadi>
exactly
21:24
<Mip5>
okay - that helps!
21:25
<Gadi>
so, the only /bin/sh running is the first one in the master script
21:25
that is including all the rest
21:26
we are kinda obsessed here with minimizing our use of memory
21:26
as, well, at least inn the good ole days, we had very little to spare
21:26
but even these days, the less you waste, the faster things go
21:29
<Hyperbyte>
Gadi, I wish all developers had your look on things. :)
21:30
<Mip5>
ah - that makes sense. So, it seems the file in Xexit.d/ can just be a one liner (no shbang) that's not executable.
21:30
<Gadi>
Hyperbyte: well, LTSP is a really good project for exposing waste in other projects
21:30
Mip5: that would be my guess
21:31
Mip5: to know for sure, you can look at that /usr/bin/EndXSession script
21:31
Mip5: and see if it uses "." to call the scripts in Xexit.d
21:31
or if it just calls them
21:31
brb
21:36
<Mip5>
okay - I can't find /user/bin/EndXSession maybe that's the problem
21:36
I mean /usr/bin/EndXSession
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21:37
<Mip5>
Ah - I found it in /usr/share/Xexit/
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21:48
<Mip5>
Gadi: Yeah, it looks to be sourced by the file /usr/share/Xexit/EndXSession. I'll keep playing with this. Thanks again for your help and explanations.
21:53
Curiously - when I ps aux | grep Xexit, I see several instances of the program running. However, all the instances of my ltsp logins show uid, and not login name. In contrast, the instance associated with my session shows my username.
21:55
<darkpixel_>
I have two separate sites running LTSP under Ubuntu 10.04 (Lucid). About a week ago thin clients started not coming back up after rebooting. They simply flash like they are trying to start x but fail. The client logs show nbd-client giving an error message about an invalid partition. The server shows DHCP requests, and nbd connections followed by nbd disconnects.
21:56
Someone mentioned yesterday to try disabling compiz, that had no effect. The clients aren't getting far enough to log data to .xsession-errors. I've even tried rolling the nbd packages on my system back to the original archive version with no change. Does anyone have any pointers?
21:58
<Mip5>
darkpixel_: Have you checked more mundane level switching? Do you still have good connectivity to your clients (ie, check the cable...)? Does it happen to all thin clients, or just some on some aspect of the network?
21:59
<darkpixel_>
Mip5: All thin clients. One site has 13, the other has 3.
22:00
Mip5: Also, connectivity appears good. Pinging with large packets gives <1msec and no drops.
22:00
<Mip5>
Had you run updates prior to the issue, or done anything else around the time of the issue? Any chance someone else has setup a dhcp server on your network?
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22:04
<darkpixel_>
Mip5: I usually connect in every 3-4 weeks and install updates. Unfortunately the server never gets rebooted (~240 days uptime). I have no clue how frequently the thin clients get rebooted. I did try rebooting the server to fix it. No effect. No rogue DHCP servers that I can see.
22:06
Mip5: I just disabled auto-login and my on-site tech tells me he gets a login screen now followed by "No response from server, restarting". I'm sure Google will be helpful with that one--I recall dealing with it last year at some point.
22:06
<Mip5>
darkpixel_: have you tried rebuilding the image?
22:06
<darkpixel_>
Mip5: Yes.
22:09
<Mip5>
darkpixel_: sometimes packages can be updated and things can go wrong. Have you tried running apt-get to search for broken or mis/incomplete packages on your server, and in your chrooted environment?
22:10
<darkpixel_>
Mip5: Just figured it out. Apparently one of the techs was making a change to our central puppet server and pushed out 'PasswordLogins No' to SSH on all our servers--not just our external servers.
22:10
<Mip5>
Ah - excellent! Good find
22:12
<matrix3000>
to use the NFS_HOME= definition to access an external NFS server i could do NFS_HOME=192.168.2.17:/home
22:12
?
22:13
<darkpixel_>
Mip5: Now to figure out how to get an account on the LTSP wiki so I can add that....
22:13
<Mip5>
;-)
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22:26
<matrix3000>
anyone?
22:26
to use the NFS_HOME= definition to access an external NFS server i could do NFS_HOME=192.168.2.17:/home
22:30
<vagrantc>
hrm. apparently undocumented in lts.conf manpage...
22:30* vagrantc makes a note to figure that out and update it later
22:32
<Mip5>
Well thanks gang. Talk to you tomorrow, g'night
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22:46
<matrix3000>
vagrantc: thank you man, i know you can do the /home, but double mounting an nfs mount doesn't sound like a smart idea
22:46
<Gadi>
matrix3000: that's right
22:46
it works just as you think
22:46
<matrix3000>
sweet really!
22:47
<Gadi>
yeah, if you leave out the IP, it just assumes the boot server
22:47
but, you can specify the IP to be somewhere else
22:47
<matrix3000>
and if i put in the ip it looks for the NFS at the ip
22:47
<Gadi>
right
22:47
<matrix3000>
and i would use :/home at the end of it
22:47
<Gadi>
yup
22:47
<matrix3000>
like i was doing a reall nfs mount in fstab
22:47
<Gadi>
yup
22:48
<matrix3000>
sweet, yea, trying to finally conquer that Google Chrome singletonlock crap
22:48
<Gadi>
there is also NFS_HOME_OPTIONS
22:49
<matrix3000>
and what is that?
22:49
<Gadi>
so, you may also want: NFS_HOME_OPTIONS="defaults,nolock"
22:49
guess
22:49
:)
22:49
<matrix3000>
ah ok
22:49
any documentation on that?
22:50
<Gadi>
ask alkisg - its his code ;)
22:50
<matrix3000>
ah ok
22:50
yea, so prolly not
22:50
lol
22:50
and defaults no lock will do what?
22:50
<Gadi>
mount -t nfs -o defaults,nolock $NFS_HOME /home
22:50
in essence
22:50
:)
22:51
<matrix3000>
cause i never used any of that when i did the fstab
22:51
before
22:52
reading the manpage now for nfs
22:52
ah ok
22:52
i got it now
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23:13
<darkpixel_>
So how can I get edit access to the wiki to add information about my problem with SSH?
23:18
<alkisg>
darkpixel_: the ltsp wiki or the ubuntultsp wiki?
23:19
<darkpixel_>
alkisg: The one on sourceforge. Should I just type something up into pastebin and give the link to an admin to post?
23:20
<alkisg>
Not sure, that wiki is kinda unmaintained, and Hyperbyte's planning to revive it
23:20
So maybe the best thing is to wait a couple of weeks until it's taken its new form
23:21
<darkpixel_>
alkisg: Sounds good--I'll try back in a few weeks. Thanks for your help yesterday by the way. Tuned out our puppet server pushed 'PasswordAuthentication no' to all our ssh servers. (All our admins use ssh keys anyways) Finally figured out that affects LTSP. ;)
23:22
<alkisg>
Yeah and unfortunately it doesn't display the ssh warnings/errors
23:22
Hope it will on the next version
23:23
<darkpixel_>
alkisg: Yup. Oh well. I was about to fire up strace when I happened to glance over at the commit list from our management server and noticed the ssh change...
23:24
alkisg: Gotta reboot and tackle a stupid alsa/pulse/unity/gnome/webcam/ubuntu sound issue. I can't think of anything worse than audio issues in Ubuntu. ;)
23:24
Later
23:24
<alkisg>
bb
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23:24
<Gadi>
alkisg: so, I think we should use /var/cache/ltsp/ltsp_config to store some initramfs vars for our new initramfs-scripts script to use
23:25
in other words, things like
23:25
<alkisg>
Gadi, don't we store stuff there already?
23:25
<Gadi>
NBD_ROOT_HOST, DNS_SERVER, etc
23:25
yeah
23:25
some
23:25
<alkisg>
Ah you mean to put more stuff there
23:25
<Gadi>
but, I am looking at our nfs-bottom script
23:25
<alkisg>
Indeed, and boot_iface will be useful
23:25
<Gadi>
and that should be reimplemented
23:25
yeah
23:25
<alkisg>
nfs-bottom? why do we have that?
23:26
<Gadi>
I feel like I am dismantling lots of stuff
23:26
:)
23:26
<alkisg>
i mean, we need one script for premount, and one at init-bottom, right?
23:26
<Gadi>
right
23:26
that's where we are headed
23:26
what we currently have is nfs-bottom
23:26
and ltsp_nbd
23:26
<alkisg>
OK, let me see that...
23:27
<Gadi>
we should add code to our new init-bottom script that writes certain vars to $rootmnt/var/cache/ltsp/ltsp_config
23:28
then, our initramfs-scripts script can use those vars to set the conf files
23:28
<alkisg>
Everything at nfs-bottom should go away and be put in plugins, right?
23:28
<Gadi>
right
23:28
and I suggest using that cache file to preserve certain env vars
23:29
(that will otherwise be lost)
23:29
<alkisg>
Also, aren't those env vars available from the plugins?
23:29
<Gadi>
no - they will be lost when we run chroot $rootmnt initramfs-scripts
23:30
gotta run for a bit
23:30
<alkisg>
?
23:30
<Gadi>
but give it some thought
23:30
<alkisg>
chroot preserves the vars for me
23:30
<Gadi>
does it?
23:30
<alkisg>
Yup
23:30
<Gadi>
ok
23:30
well, then maybe we don't have to
23:30
<alkisg>
So our bottom plugin can be really simple
23:30
*script
23:30
<Gadi>
right
23:30
<alkisg>
And most of the code can go in plugins
23:30
<Gadi>
ok brb
23:31
<alkisg>
OK, bb, cu later
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23:53
<matrix3000>
http://screencast.com/t/oRdooeeIp7t
23:53
alkisg, where should i look to fix that, never seen that before
23:54
<alkisg>
matrix3000: please ask in the channel, don't ping specific persons... I don't know I've never seen that either, what's your pxelinux.cfg/default like?
23:56
<matrix3000>
ok sorry
23:56
ill just rebuild it
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