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


Channel log from 3 May 2012   (all times are UTC)

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01:48
<highvoltage>
the ltsp-discuss list wins the prize for most boring distro-war of 2012 :)
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04:58* vagrantc waves to alkisg
04:58
<alkisg>
Hi vagrantc, hi all
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04:59* vagrantc built an ext4 NBD image, booted to it without the LTSP code ...
04:59
<vagrantc>
it really works... it's great.
05:00
and since it's an editable image, don't even need publish-image or any of that,.
05:00
<alkisg>
vagrantc: also try compressed btrfs, I think I'll put support in ltsp-update-image for that ;)
05:00
I.e. ltsp-update-image --rsync or something
05:00
<vagrantc>
alkisg: with the debian create-fs-image plugin, it's already there.
05:01
although i don't know if i need to do anything fancy with btrfs at filesystem creation time to get all the features we might want.
05:01
<alkisg>
How do you decide the size of the loopback image?
05:01
<vagrantc>
alkisg: it's essentially hardcoded.
05:01
<alkisg>
Not at creation; at mount time -o compress
05:02
<vagrantc>
so, depending on the mount options, some files may end up compressed, and some not?
05:02
if you mount it differently each time?
05:02
<alkisg>
What I also wonder about is whether such a loopback device would be fast if mounted over NFS (as a single file)
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05:02
<alkisg>
(08:02:34 πμ) vagrantc: so, depending on the mount options, some files may end up compressed, and some not? => yup
05:03
<vagrantc>
wacky
05:03
<alkisg>
That might solve the NBD disconnect/reconnect issues, and it would actually work with an unmodified initramfs without any ltsp/nbd code in it
05:03
<vagrantc>
alkisg: you still have NFS's protocol overhead, which is kind of talky.
05:05* vagrantc has been using LTSP to test a new kernel variant for armhf that's supported in qemu :)
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08:16
<JensenDan>
hey ya all. iam in to the setting up pxe boot menu and all that stuff, BUT! i have a image, this test it is a image of a win08 server. how do i serve that as an option? and actually make it work? so that i can select that from the boot menu, and it wil install win08 ?
08:17
<alkisg>
JensenDan: you should be asking that question in #windows, linux users know nothing about windows network booting
08:17
(in general :))
08:18
<JensenDan>
:D
08:18
it is running on a ltsp server ;)
08:18
<alkisg>
If you also happen to use a logitech keyboard, you should be asking logitech instead :D
08:19
<JensenDan>
iam running ltsp, and have the pxe boot and all that kind works perfectly, i have the image in i386, and set it to that image in the menu, but i just dont know what to set the kernel!? and, what is the kernel.
08:19
<alkisg>
Really, not related to linux at all
08:19
<JensenDan>
does it still not belong in here ? :)
08:19
<alkisg>
Yup
08:19
<JensenDan>
ehm.
08:19
all right :s
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08:33
<Hyperbyte>
JensenDan, Windows 98?! Are you NUTS?
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08:33
<Hyperbyte>
Oh
08:33
Windows 08
08:34
I've never ever seen it called that.
08:34
Either way good luck with that. :)
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08:44
<JensenDan>
Hyperbyte good luck, what do you mean? :)
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10:20
<Hyperbyte>
JensenDan, I mean I wish you luck with Windows. :)
10:22
<alkisg>
Yeah except for RIS or WSUS, windows remote booting is a pain
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10:28
<sep>
alkisg, i did something similar. you have to use a tftp server that can remap windows's path separators... ie from \ to / i used tftpd-hpa; i used pxelinux and it's vesameny , and configured dhcp as normal; then you need to chainload microsoft's net loader. and give the image as a argument ; sdi.c32 might be an option for you, but the system i was on did not make compatibe limages.
10:28
http://www.etherboot.org/wiki/tftp_backslash/tftpd-hpa?DokuWiki=e93f5757705303bde32c8ecdecfa9329
10:28
images we used was made acording to ; http://www.deployvista.com/Home/tabid/36/EntryID/54/language/sv-SE/Default.aspx
10:29
<alkisg>
sep: I'm not the one interested for windows booting; JensenDan is, but also the main problem is that you need to install san or other drivers for windows to be able to netboot
10:29
And you need one image for each client, which is very annoying
10:29
If I ever had need for windows clients, I'd send a single VM over LTSP fat clients
10:30
<sep>
alkisg, sorry for the wrong nick :)
10:30
<alkisg>
np :)
10:31
<sep>
all your points are correct tho. my points are just for booting. :)
10:33
JensenDan, I think a san with writeable snapshots. master image is snapshotted into uniq machine images that you can write to. ; then you use gpexlinux and netboot onto iscsi or ataoe ?
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11:16
<alkisg>
ogra_: about your dual arch DVD idea for i386/amd64... a) newer isolinux versions can detect i386 vs amd64 and load the correct kernel, and b) squashfs removes duplicate files, so if you have 1 squashfs image with 2 subdirs, i386/ and amd64/, and pivot_root to one of those dirs from the initramfs, then you don't need double the size, I imagine you need even less than 1.3 the size.
11:16
<ogra_>
oh cool, but it didnt look to me like the idea was generally well recieved
11:18
<alkisg>
du -sh /lib/
11:18
172M /lib/
11:18
If we assume that the arch specific files are only in there, it would mean less than 100mb increase of the squashfs image
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12:07
<hughessd>
hi i just did a fresh install of LTSP5 but the clients aren't booting
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12:07
<hughessd>
is there a list of common snags that newbs like me come across?
12:08
im guessing it's just that the clients are able to 'see' the tftp server
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12:14
<dgeary2>
hughessd, there is a lot of technology involved in getting a working system. which parts are you familiar with and which parts no-so-much?
12:15
btw i've just started learning about LTSP myself but already have some experience with network booting
12:19
hughessd, what happened immediately before the client didn't boot
12:23
<alkisg>
!tftp | echo hughessd:
12:23
<ltsp`>
hughessd: tftp: Here's a page to help you troubleshoot TFTP problems in Ubuntu: https://help.ubuntu.com/community/UbuntuLTSP/Troubleshooting/TFTP
12:31
<Hyperbyte>
!alkisg
12:31
<ltsp`>
Hyperbyte: alkisg: The LTSP oracle. Our beacon of hope in the world of LTSP. With the guidance of this divine emperor, we shall prevail.
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13:59
<sbalneav>
Morning all
14:03
<highvoltage>
morning, sbalneav!
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14:51
<sbalneav>
Back in a bit.
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15:20
<jvx>
Any known issues getting LTSP running on Lubuntu 12.04?
15:21
<alkisg>
!ltsp-bug
15:21
<ltsp`>
alkisg: ltsp-bug: To file a bug report for upstream LTSP, go to https://bugs.launchpad.net/ltsp
15:21
<alkisg>
A few are there affecting 12.04
15:21
For any known issues not there... bugs should be filed :)
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15:28
<jvx>
alkisg, I tried searching (after other terms) '12.04' and didn't get any hits back. 'ubuntu' generic shows items but for 10.04 etc. Maybe I should roll back before my second part of my test.
15:29
I'm putting LTSP on a booting flash drive.
15:29
<alkisg>
jvx: in short, there are a few glitches but nothing too serious
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15:29
<jvx>
(yes slow...)
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15:30
<jvx>
ok. I'll try my install again. Thx.
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15:45
<NeoX>
hi
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15:45
<NeoX>
I'm trying LTSP,
15:46
<andygraybeal_>
go go go!
15:46
it's awesome!
15:46
<NeoX>
for that, i setup an LXC container to be my pxe server and lxc server too
15:46
<andygraybeal_>
what is lxc?
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15:47
<NeoX>
lxc is kind of virtualisation but only container for service (like openvz)
15:47
<andygraybeal_>
ah i never heard of it; awesome
15:47
i run kvm
15:47
<NeoX>
kvm makes you run virtual pcs inside your linux, where you can put other linux, but also bsd or either win
15:48
lxc can only run other linux
15:48
as it share the same kernel on all guest
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15:48
<andygraybeal_>
okay, i think i understand thnak you :)
15:48
<NeoX>
but it allows you to have multiple host sharing the network, proc, ram
15:49
isolating you squeeze machine from your ubuntu, to be able to test migration and some stuff
15:49
<alkisg>
NeoX: what is an "lxc server"? did you mean "ltsp server"?
15:49
I've heard about lxc containers, but not about lxc servers...
15:50
<NeoX>
alksig : lxc server (for me) is the machine master the LXC container
15:50
so,
15:50
I got an LXC container that acts as my tftp/pxe/ltsp
15:50
isntalled on ubuntu 12.04 host
15:51
LXC is also 12.04
15:51
<alkisg>
Sounds nice, any problems so far?
15:51
<NeoX>
LTSP is installed from ubuntu package ltsp-server-standalone
15:51
the issue is when using ltsp-build-client
15:51
it did not finish because
15:52
it can't chroot /opt/ltsp/ mount -t proc proc /proc
15:52
:(
15:53
<alkisg>
Is that an lxc restriction?
15:53
<NeoX>
i guess it is a container issue as I dont have this issue if running on the host server
15:53
<alkisg>
(/opt/ltsp/i386, I assume...)
15:53
<NeoX>
if I chroot myself inside /opt/ltsp/i386, I can mount -t proc by hand
15:54
<alkisg>
Do you have the exact line with the error message?
15:54
<NeoX>
same issue if ltsp-build-client in amd64
15:54
I: Extracting xz-utils...
15:54
I: Extracting zlib1g...
15:54
W: Failure trying to run: chroot /opt/ltsp/amd64 mount -t proc proc /proc
15:54
error: LTSP client installation ended abnormally
15:55
<alkisg>
And at that point, if you run sudo chroot /opt/ltsp/amd64 mount -t proc proc /proc, it succeeds ?
15:56
<NeoX>
i'am already root on this container
15:56
if i first run chroot /opt/ltsp/amd64
15:56
then mount it works (saying read only proc)
15:57
and if i run the whole line, yes it works
15:57
but says the block device is read only
15:58
that may explain the exit from the package isntaller
15:58
<alkisg>
Run: chroot /opt/ltsp/amd64 mount -t proc proc /proc && echo it works
15:58
This way you also check the command result
15:59
<NeoX>
i doesn't work ;)
15:59
chroot /opt/ltsp/amd64 mount -t proc proc /proc && echo it works
15:59
mount: block device proc is write-protected, mounting read-only
15:59
mount: cannot mount block device proc read-only
15:59
<alkisg>
OK, it would be an lxc issue then, not sure if people here can help you, maybe some #ubuntu channel would be more apropriate. stgraber has tried lxc containers, not sure if he's available..
16:01
<NeoX>
i'll check on lxc what i can find
16:01
<stgraber>
NeoX: right, that's our apparmor profile blocking it as mounting proc outside /proc in the container bypasses much of the security measures in place for lxc containers
16:01
<NeoX>
thanks alkisg, thanks andygraybeal_
16:01
<stgraber>
NeoX: to allow it anyway, follow the following steps (trying from memory):
16:02
<NeoX>
hi stgraber, thks for joining us
16:02
<stgraber>
NeoX: sudo cp /etc/apparmor.d/lxc/lxc-default /etc/apparmor.d/lxc/lxc-ltsp
16:02
NeoX: edit /etc/apparmor.d/lxc/lxc-ltsp to change the first line (profile lxc-container-default to profile lxc-container-ltsp)
16:03
<NeoX>
on the host or on the container ?
16:03
<stgraber>
NeoX: add a line "mount -> /opt/ltsp/**," to it
16:03
NeoX: host
16:03
NeoX: then: sudo /etc/init.d/apparmor reload
16:03
NeoX: then shutdown your container
16:04
NeoX: edit your container config, uncomment the aa_profile line and set it to lxc-container-ltsp
16:04
NeoX: start your container again
16:04
you can probably also use "lxc.aa_profile = unconfined" that'll bypass apparmor entirely, though that's even worse for security...
16:06
NeoX: https://help.ubuntu.com/12.04/serverguide/serverguide.pdf has a LXC chapter covering the apparmor stuff too
16:09
<NeoX>
ok, first time i play with apparmor
16:09
;)
16:13
well, lxc wont start the container with the new profile (even set on unconfined)
16:14
but that might be the trick as I also read some /proc/fs inside apparmor profile that bog me on starting nfs inside container
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16:14
<NeoX>
I will have a deeper look on apparmor
16:14
thanks stgraber for pointing me this
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16:17
<stgraber>
NeoX: ok, if you're stuck there, you may get some more help in #lxccontainers, I'm not extremely familar with the apparmor change (even if I implemented half of it ...) but hallyn in that channel may be able to help you more (as the author of the other half of the change and the author of the server guide)
16:18
<NeoX>
well, this is a good path to follow, i've downloaded the serverguide,
16:18
i'll check the apparmor trick, and come back to lxccontainer if I still stuck
16:23
thanks everyone
16:23
bye
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17:38
<alkisg>
vagrantc: meeting, if you have time
17:40
sbalneav: meeting, if you are here :)
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18:48
<hughessd>
alkisg: thank you for the link
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18:48
<hughessd>
and thank you for responding, dgeary2
18:48
i didn't get to see your responses until now. :)
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19:00
<hughessd>
the clients won't boot with out a lts.conf right?
19:00
should there be a default one created at install?
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19:01
<vagrantc>
they should boot without an lts.conf
19:01
(although some old versions had a bug that failed badly)
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19:04
<hughessd>
hi vagrant!
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19:05* vagrantc waves
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19:07
<hughessd>
alkisg already sent me a link on troubleshooting
19:07
its pointing towards the file not being served up
19:07
i tried to manually pull down the pxelinux.0 img, but got a timeout error.
19:08
vagrantc: do you think it's a permissions problem?
19:08
the image is in the place that it's supposed to be....
19:08
(fyi)i'm remaking my whole LTSP setup after some upgrading troubles...
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19:28
<alkisg>
hughessd: edit /etc/default/tftpd-hpa and put --verbose right next to --secure
19:28
Then service restart tftpd-hpa, boot client, check /var/syslog
19:30
<hughessd>
ok ill try that, but i just found out dhcp wasn't even running
19:35
<alkisg>
Yey gimp 2.8 released at last!
19:40
Single window mode, sweet
19:41
<vagrantc>
you mean, you don't have 30 toolbars floating all over the place?
19:43
<ogra_>
how boring
19:43* ogra_ thinks that made you look way more professional compared to photoshop users
19:45
<ogra_>
like a rear spoiler on a bicycle :)
19:53
<hughessd>
yay! client boots!
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19:58
<hughessd>
hm, can't login
19:58
can't ssh in
19:59
i think i'm locked out..... wtf
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21:03
<hughessd>
alkisg: thanks again for your help. I have the clients pulling the image properly now.
21:03
however, even though their passwords seem to work, the thin clients keep going back to the login.
21:04
besides the sys logs where can i look for clues as to what is happening to cause them to fail?
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21:36
<alkisg>
hughessd: distro/version? if ubuntu 12.04, try setting the default session to ubuntu-2d
21:36
!ubuntu-2d
21:36
<ltsp`>
alkisg: ubuntu-2d: To select ubuntu-2d as your default session, put this line in your lts.conf: LDM_SESSION="gnome-session --session=ubuntu-2d"
21:36
<hughessd>
yes, i have that
21:36
oops
21:37
no wait, only one dash ('-')
21:38
<alkisg>
(you also need a [Default] line on top of lts.conf)
21:39
<hughessd>
mine's pretty simple
21:39
[default]
21:39
SCREEN_01=shell
21:39
SCREEN_07=ldm
21:39
LDM_DIRECTX=True
21:39
LDM_SESSION="gnome-session --session=ubuntu-2d"
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22:41
<alkisg>
hughessd: Don't use SCREEN_01 on debian and ubuntu as it's reserved for boot messages
22:42
<hughessd>
ok
22:42
just a sec
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22:46
<vagrantc>
(screen_01 - screen_06 typically has stuff on debian
22:46
)
22:46
<alkisg>
hughessd: what are you using btw, debian or ubuntu?
22:46
Ah, gnome-session=ubuntu-2d, ok
22:47
<vagrantc>
maybe i should mangle /etc/inittab from init-ltsp.d ...
22:48
<alkisg>
It does save a few mb ram, and allows people to use screen2-5...
22:49
<vagrantc>
would need a way to override it, though
22:50
<alkisg>
if boolean_is_true ${DISABLE_GETTY:-True} ...
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22:54
<vagrantc>
oh right, we have access to lts.conf and related variables by then
23:10
<hughessd>
alkisg: it worked!
23:10
i can now boot the thinclients. thank you!
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23:12
<alkisg>
You're welcome
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