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


Channel log from 24 March 2012   (all times are UTC)

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06:29
<tessier>
hello all! I have an LTSP Term 1720 with a 4G CF card in it that I want to reinstall the OS on. But I can't seem to get it to go into BIOS to boot from a USB CDROM. What is the usual way to enter BIOS from a cold boot?
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06:46
<alkisg>
vagrantc: hello, in ltsp-build-client/095-update-image Ubuntu has this: chroot $ROOT /etc/kernel/postinst.d/ltsp-update-kernels
06:46
...and Debian doesn't, do you do it in ltsp-client postinst?
06:47
<vagrantc>
alkisg: don't see any reason to
06:47
<alkisg>
For the vmlinuz symlinks etc to be generated
06:47
<vagrantc>
happens as part of the kernel package postinst
06:48
<alkisg>
On a vbox client, if I install ltsp-client, the postinst isn't triggered
06:48
<vagrantc>
after the fact, yeah, i suppose not.
06:48
you've already got the kernel installed.
06:49
<alkisg>
I think that's the case for ltsp-build-client too, the kernel would be installed before ltsp-client, right?
06:49
<vagrantc>
the ltsp-client should (directly or indirectly) regenerate the initramfs at least
06:49
<alkisg>
I want to move it to ltsp-client postinst, do you happen to know how to trigger a kernel postinst (like grub does it) without manually calling it?
06:49
<vagrantc>
alkisg: no, the kernel is installed in the finalization phase on Debian, and ltsp-client-* is installed in an earlier phase.
06:50
alkisg: dunno.
06:50
<alkisg>
Ah, debootstrap doesn't install a kernel?!
06:50
<vagrantc>
not in the least
06:50
<alkisg>
Thanks.. hm...
06:52
...I wonder why the initramfs contained the ltsp code then, but the vmlinuz symlinks weren't there
06:52
<vagrantc>
the symlinks have been deprecated on Debian... so it would be good if our code didn't depend on them.
06:52
alkisg: probably there are initaramfs-tools triggers that happen when files are added/removed from relevent dirs.
06:53
<alkisg>
Ah, just initramfs, not actual kernel postinst trigger, got it
06:53* vagrantc vagrantc -> pumpkin
06:53
<alkisg>
'night vagrantc
06:54* vagrantc wonders why ltsp and epoptes haven't hit sid yet ...
06:54
<vagrantc>
hrm.
06:54
<alkisg>
I'll make a shell function for kernel sorting, but I'm worried that it's a big change to put in precise
06:54* vagrantc postpones really wondering till tomorrow
06:54
<alkisg>
:)
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07:03
<alkisg>
Heh. I wonder why this hasn't given us trouble yet: server/plugins/functions, function detect_latest_kernel() :
07:03
kernelversion="`ls -d $ROOT/lib/modules/2* | sort -nr | head -n1 | xargs basename`"
07:03
....we're in kernel 3 now, not 2....
07:06
Ah, because only k12linux uses that function :)
07:30
knipwim: how are the kernels named in gentoo? e.g. linux-image-3.2.0-20-generic-pae ?
07:31
Errr sorry, I meant vmlinuz-3.2.0-20-generic-pae
07:31
The file name, not the package name
07:47
<knipwim>
alkisg: the default gentoo kernel builder produces kernel names like: kernel-genkernel-x86-3.0.6-gentoo
07:47
or kernel-genkernel-x86-2.6.34-gentoo-r12
07:48
<alkisg>
knipwim: nd the amd64 ones?
07:48
*and
07:48
<knipwim>
x86 -> amd64 i think
07:49
<alkisg>
knipwim: thanks, I'm trying to implement a generic kernel sorting function.... that x86 in front makes it harder though, all amd64 kernels would come before x86 ones.... /me thinks more... :-/
07:50
<knipwim>
hmm, distro specific function ?
07:50
<alkisg>
knipwim: I'll use sort -V
07:51
That works for debian + ubuntu, and you can override it to bypass the x86 first
07:51
(maybe by using the "key" sort parameter)
07:52
I think sort -V works on fedora too, no idea how opensuse names its kernels though
08:01
get_sorted_kernels() {
08:01
ls /boot/vmlinuz-* | sort -rV
08:01
}
08:02
That would be the generic one, and you can override it for Gentoo
08:02
<knipwim>
that would work: ls /boot/kernel-genkernel-x86-* | sort -rV
08:03
<alkisg>
But it wouldn't bring the amd64 kernels, right?
08:03
<knipwim>
ehm, perhaps an arch check would be in order
08:03
<alkisg>
You could even just put ls /boot/kernel-* | sort -rV, and just have the x86 listed after the amd64 ones, no big deal
08:04
It's not guaranteed that the user would prefer the most recent kernel over some arch anyway...
08:05
And it's a corner case, the user can set it own default (for pxelinux menus) manually in that case
08:05
<knipwim>
i never use the update kernels
08:06
<alkisg>
That's for a new functionality, I want to implement graphical+automatic pxelinux menus
08:06
<knipwim>
but build one x86 chroot, for an atom kernel, pentium 3, efficeon, via c7
08:06
<alkisg>
Something like that: http://alkisg.mysch.gr/steki/index.php?action=dlattach;topic=2828.0;attach=1672;image
08:08
highvoltage: would you be interested in creating an LTSP pxelinux theme similar to the above one? ^
08:09
I.e. background + font colors, I have the code for that ^ one
08:13* knipwim removed 010-chroot-tagging
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08:40
<alkisg>
Scripts that still use /etc/ltsp_chroot are ltsp-bind-mounts, which maybe could be completely removed if noone's still using it, and the ALTLinux/K12Linux ones, which I don't know when they'll be updated... :)
08:41
<knipwim>
i was wondering about the ltsp-bind-mounts
08:41
who used it, because gentoo ships a similar one
08:43
<alkisg>
I think vagrantc was using that, but since he's switched to NFS+aufs, I'm not sure if he's even tested it with recent trunk
08:43
knipwim, are you still supporting bind-mounts?
08:43
<knipwim>
yeah :/
08:44
<alkisg>
Why? Any advantages over aufs?
08:44
<knipwim>
couldn't get aufs to work
08:44
<alkisg>
Ah :(
08:44
You could run aufs from init-ltsp.d too
08:44
And just use it for certain directories, like /etc
08:44
<knipwim>
hmm
08:44
that might be an option
08:45
it's still on my todo list
08:45
<alkisg>
I think that it would even be possible to use it for /, but you'd need to ask the aufs folks for the exact how-to
08:45
<knipwim>
my first goal was to get nbd boot working
08:46
<alkisg>
Maybe create a tmpfs /somewhere, bind-mount root to /somewhere-else, merge them with aufs to /a-different-place, and finally mount --move /a-different-place to /
08:46
<knipwim>
i could get it to work manually, using a port based export from the commandline
08:48
<alkisg>
NFS with aufs would be a good start, and nbd would then only be a few lines away...
08:51
<knipwim>
i was thinking to implement the detect_arch in common
08:51
and put ltsp-common-functions-gentoo in the trunk root as well
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20:07
<vagrantc>
shogunx: you're using HP t5325 thin clients in production? what OS?
20:07
shogunx: or was that just an experiment?
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20:39
<shogunx>
vagrantc i have one running on my lab bench. it seems to work pretty well. i have not sold a system since i started playing with it, but i would consider it a viable option to the geode based devices i am using now.
20:39
better, actually, due to lower power draw, and better graphic performance.
20:40
debian on the server, and your debian ltsp image on the client.
20:41
all in all, i like the move to ARM and i think that is one of the best paths forward for my particular application, given the power restraints i work with.
20:43
honestly, i would also like to have a server comprised of 32 low clock speed (1ghz or so) arm processors for a ltsp type workload
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20:44
<shogunx>
keep a couple running for os processes, and quiesce the others when not in use.
20:51
<vagrantc>
shogunx: cool.
20:52
shogunx: it hasn't received much love in debian-installer, but i think the kernel is still supported.
20:54
<shogunx>
would not be the first time i had to build an os up from scratch...
20:56
<vagrantc>
in fact, what little support was there in debian-installer was just removed.
20:57
<shogunx>
for arm?
20:57
or for the ltsp-arm image?
20:58
<vagrantc>
for the hp t5325 specifically
20:59
<shogunx>
bogus. your original notes still work, yes?
20:59
<vagrantc>
armel support is pretty solid in Debian :) and armhf is getting there.
20:59
shogunx: i haven't tried recently, but i don't have any reason to believe they wouldn't
20:59
<alkisg>
stgraber, vagrantc, can I go ahead and remove all the symlinks from init-ltsp.d and change the initramfs paths to refer to init-ltsp.d instead of /common?
21:00
<shogunx>
i'm confused... what was in debian-installer for us?
21:00
<vagrantc>
alkisg: i'd like to test it.
21:01
<alkisg>
You mean if debian/install allows that? I can do a quick test with the epoptes dir...
21:01* alkisg tries
21:01
<vagrantc>
shogunx: tbm was working on support for installing directly to the hp t5325's flash drive in debian-installer, but never finished it, and recently removed it.
21:01
<shogunx>
how far along was it?
21:02
<vagrantc>
shogunx: but that shouldn't be needed for using them as a thin client, just the kernel support really, since the armel arch is working
21:02
shogunx: dunno.
21:02
<shogunx>
i agree with your assessment as to thin client use.
21:03
i was considering if it was something worth finishing, when asking about how far he got.
21:03
<vagrantc>
shogunx: heard anything about HP's new arm-based thin clients? i haven't been able to dig anything up.
21:03
just heard that the t5325 was discontinued and there was some new model they were hocking.
21:03
<shogunx>
i have not, but i will probe around.
21:04
i still think raspberry pi b model will make a great client.
21:04
small enough to hack into the back of a monitor.
21:06
<alkisg>
vagrantc: it worked fine
21:07
<shogunx>
oh my. the t5325 has gotten cheap too.
21:07
i should stock up.
21:07
<vagrantc>
shogunx: direct from HP, or elsewhere?
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21:13
<shogunx>
all over the place
21:15
<vagrantc>
shogunx: were you using the vesa driver, or some other driver?
21:20
<shogunx>
not sure. i can look, but i will need to do so after i get back from my little ones birthday party.
21:21
seems as tho it was better resolution than vesa tho
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22:26
<bara>
is it possible to add users to extra groups they arn't in on the server?
22:35
<vagrantc>
probably with pam modules, such as pam_group
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