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


Channel log from 16 March 2008   (all times are UTC)

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07:39
<daya>
Hi, all
07:39
ldm in lenny is not working any idea,
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09:55
<ogra_cmpc>
oooof
09:55* ogra_cmpc just finished working through a >2500 mail backlog
09:57
<ogra_cmpc>
vagrantc, http://code.google.com/p/compcache/
09:58* laga fires of another 2500 mails to ogra_cmpc
09:58
<vagrantc>
ogra_cmpc: crazy
09:58
<ogra_cmpc>
it's claimed that it has nearly a 50% compression rate ... so having a swapfile in a tmpfs would actually gain us extra ram
09:58
<vagrantc>
ogra_cmpc: kernel module?
09:58
<ogra_cmpc>
i'll examine it in intrepid for subnotebook stuff
09:58
no idea, i havent looked inside the tarball yet
09:59
just stumbled across
09:59
if that works we could even support 24M clients out of the box without swapfiles :)
10:00
s/swapfiles/swapfiles from initramfs/
10:00
<vagrantc>
getting below 32M without network swap would be key.
10:01* ogra_cmpc cant stop being impressed by the SDHC card he bought ...
10:01
<vagrantc>
SDHC ?
10:01
<ogra_cmpc>
SD card with new hipeed technology
10:01
<cyberorg>
great, i am not able to get nbdwap working properly, i get "Device or resource busy" on swapon /dev/nbd1
10:01
<ogra_cmpc>
it getsw to transfer rates of about 20M/s
10:02
which is faster than the 18M my laptop disk does :)
10:03
or any of my usb keys
10:05
<vagrantc>
ogra_cmpc: that compcache thing is slick ... it's implemented as a block device
10:05
<ogra_cmpc>
cool
10:06
i'll set up a spec for next UDS :)
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10:11
<vagrantc>
ogra_cmpc: you install the module and just do: swapon /dev/compcache0
10:11
<ogra_cmpc>
wow
10:11
<vagrantc>
it may just eat whatever ram it uses though ... not dynamically allocating it
10:11
<ogra_cmpc>
i'm curious what our kernel team will say
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10:31
<steph_>
ogra_cmpc: would it be possible to use ltsp in a virtual machine (Xen, vbox or something else). I would like to create a production and a test environnement.
10:31
<laga>
steph_: yes
10:32
<ogra_cmpc>
i'm using for tests it in virtualbox
10:32
*using it for tests
10:32* vagrantc uses virtualbox daily for ltsp development
10:33* vagrantc used to use qemu a fair bit for ltsp development
10:33* cyberorg too
10:33
<steph_>
What about Xen (pro/cons)
10:33
<rjune__>
how do I tell irc I'm not away?
10:33
/away says I'm away
10:34
<vagrantc>
steph_: i haven't tried xen as a thin-client, but the main LTSP deployment i admin uses a xen ltsp server.
10:34
rjune__: with irssi ... "/away foo message" and "/away" says no longer away
10:35
<rjune__>
vagrantc: thanks.
10:35
for some reason /away is registering as still away
10:36
<steph_>
thanks
10:43
<cyberorg>
vagrantc, ogra_cmpc we've sent two patches on the ML, one today for plugin and one earlier for ldm, how does it get committed in trunk?
10:44
<vagrantc>
cyberorg: well, seems like you're the (open)suse developer ... should give you commit access
10:45
ogra_cmpc: regarding the ldm-arbitrary-xserver-opts ... i don't particularily care about which options are supported, but do you like the idea of moving code out of LDM itself and into the screen script?
10:46
<cyberorg>
vagrantc, i'll be sorting out plugin bits in more detail, for now my main concern was to get everything working, i guess we are almost at par with ubuntu implementation feature wise :)
10:47
we get TC to boot up even on 128M ram without swap, if i could get swap working, may be it would work with 62M too
10:52
<steph_>
I read there's also KVM (kernel virtual machine). I would like to give a try, but I want to choose the more stable solution (Xen, VirtualBox, KVN, VWare, etc.) Any advices?
10:53
<vagrantc>
steph_: KVM pretty much requires hardware support in your CPU
10:54
steph_: virtualbox is most useful for testing- it's (exclusivevly?) GUI
10:55
steph_: but i wouldn't run virtualbox as a server ...
10:55
steph_: vmware is propreitary. blech :)
10:55
steph_: i don't know how Xen would handle as a client, but works great as a server.
10:56
<steph_>
vagrantc: what do you mean about "hardware support"?
10:56
<vagrantc>
steph_: qemu *feels* more flexible than virtualbox to me.
10:56
steph_: like, if you don't have the right CPU, it won't work
10:56
<steph_>
oh, ok
10:56
<vagrantc>
or rather, it'll fall back to using regular qemu
10:57
and then you may as well just use qemu
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11:13
<warren>
xen can do either full virt or paravirt
11:14
I'm not sure if paravirt can do PXe
11:14
xen fullvirt uses qemu
11:15
<laga>
vagrantc: virtualbox can also be run from the command line, FYI
11:17
<steph_>
vagrantc: I read that KVM is qemu plus some great kernel level stuff. How can I know if my CPU can work with KVM?
11:22
*quote: "Ubuntu Linux will use KVM as its primary virtualization software" - Cannonical...
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14:36
<johnny>
ugghz
14:36
genkernel has an exit 255 :(
14:37
# End of execution for now
14:37
exit 255
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14:40
<vagrantc>
johnny: someday you'll look back and say ... "i'm glad i got that out of the way"
14:40
<johnny>
?
14:41
<vagrantc>
johnny: when you're past the initial implementation and on to maintenance and feature development :)
14:41
<johnny>
i'm getting closer!
14:41
<vagrantc>
sounds like it :)
14:42
<johnny>
and.. i will be able to run it with i386 and virtualbox :)
14:42
i think it was worth the hour to figure that out up front..
14:42
since i leanred something i can use elsewhere
14:42
<vagrantc>
with my last virtualbox upgrade, i started having problems with older versions of pxelinux :(
14:43
<johnny>
actually, it's cuz of reading warren's code
14:43
i saw him using setarch, so i went and looked it up
14:43
<vagrantc>
although i'm not entirely sure it was the last upgrade, as it *was* working even with the new version at least a few times.
14:43
<johnny>
i've gotten two fixes added to our chroot creator script in the process :)
14:44
this exit255 thing i was actually stuck on for an hour or two before
14:44
i kept getting this after building the kernel
14:44
error: LTSP client installation ended abnormally
14:45
with not much info :(
14:45
looked all around the ltsp code, which is a benefit somewhat
14:45
saw the trap on_exit
14:46
looked in gekernel.. and bam
14:46
exit 255
14:47
funny comment in the script tho
14:47
## unionfs is deprecated, use aufs
14:47
but there is no --aufs flag :(
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14:53
<johnny>
and this exit 255 only exists in the forked genkernel we're using, the one that supports unionfs
14:53
the other one doesn't have it..
14:54
time to find the author..
14:54
and of course.. he is out today :(
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16:33
<vagrantc>
ogra_cmpc: i just realized ... if it's only a small number of lts.conf options ... you can pass them on the boot prompt
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22:00
<subsume>
ARP timeout.... what could that be?
22:02
<MacIver>
ever see alf?
22:03
<subsume>
You talkin' to me?
22:03
=)
22:03
Yes.
22:05
<warren>
vagrantc, +1 (moving X server config out of ldm and into the screen script)
22:05
vagrantc, makes it easier to unify it with xdmcp and other screen scripts as well.
22:08
<subsume>
I've got a thin client that is clearly seeing the server on boot (changes to DHCP settings effect the startup client IP, Mask, DHCP, gateway).... yet I'm getting ARP timeouts
22:08
I've got lots of other non-thin-clients using the server as a DHCP and they can access network / internet fine
22:10
<MacIver>
is the pxe booting?
22:11
<subsume>
I did some playing around and I got the ARP message to go away but now it says "TFTP open timeout"
22:12
http://dpaste.com/39755/ <---- my dhcp conf
22:12
<MacIver>
is the ip it's trying to get to running the tftp server?
22:12
<subsume>
Now its simply hanging on TFTP "TFTP....."
22:12
yes, the DHCP IP is correct
22:12
192.168.0.10 is the server
22:12
and all other machines that use this as DHCP work.
22:13
<MacIver>
you could try tftp from another machine on the network
22:14
see if it can connect to the server
22:15
<vagrantc>
warren: glad you like the idea.
22:17
<subsume>
MacIver: I apt-got tftp but its pretty ambiguous as to whether its actually connecting
22:18
ping works but tftp <ip> does not much
22:18
<MacIver>
subsume: you can try to actually download the ltsp/i386/pxelinux.0
22:19
<subsume>
ok
22:21
MacIver: even that command just hangs
22:21
transfer timed out, eventually
22:21
Do I need to be resetting TFTP as well as DHCP when making changes?
22:22
<MacIver>
subsume: iirc tftp server should be started by inetd on the server machine
22:22
<subsume>
MacIver: its started. I wonder if it should be restarted when I change dhcp.
22:23
<MacIver>
subsume: i don't see why it would
22:23
<subsume>
so timeout. but I get the timeout message no matter what IP I try as server
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22:23
<MacIver>
probably because none of those servers are running tftp?
22:24
<warren>
vagrantc, or rather, it might be acceptable to be in ldm only if it shares the config with other screen scripts
22:24
vagrantc, but that seems more difficult
22:24
<MacIver>
how do you know tftp server is going?
22:24
<warren>
If in doubt, run wireshark on the server and watch for TFTP traffic
22:25
<subsume>
MacIver: 192.168.0.10 is running TFTP.... I know this because.... I started it myself?
22:25
<warren>
run wireshark and see what the client is asking for exactly
22:25
I figured out my clients were asking for the wrong arch this way
22:26
<MacIver>
subsume: started it yourself...hmmm, like i said, normally on distros i've seen it automagically started by inetd
22:26
<subsume>
MacIver: I restarted it myself is what I mean, sorry.
22:26
warren: ok...wireshark installing
22:27
<MacIver>
inetd 'starts' it whenever someone connects :-p
22:28
<warren>
subsume, setup a filter before you start logging or you'll have too muc
22:28
too much
22:31
<subsume>
warren: is wireshark graphical?
22:31
<warren>
subsume, optionally graphical
22:31
<subsume>
ok
22:32
warren: could you recommend a filter?
22:32
<warren>
sorry, nee dto sleep
22:33
losing consciousness
22:33
<subsume>
k
22:33
thanks
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22:58
<subsume>
Nothing.
22:58
<MacIver>
so no response from the server?
22:59
<subsume>
I'm not getting anything with wireshark
23:00
I scoured logs. Tres difficile.
23:00
<MacIver>
using the gui?
23:00
<subsume>
MacIver: Nah... headless server
23:00
tshark
23:00
<MacIver>
subsume: you could run it ssh -Y remotely :-D
23:01
<subsume>
wow.
23:02
I'm on macosx but let me try that from another client
23:02
<MacIver>
why not from macosx?
23:02
you can do it from there
23:02
<subsume>
got errors.
23:03
getting errors from client too
23:03
X window system error
23:07
A less ambiguous tftp client would be ideal =)
23:07
this tftp thing sucks bad.
23:13
http://dpaste.com/39762/
23:13
MacIver: in case the actual thin client output sparks something....
23:15
When I comment out the next server option in DHCP, I get TFTP open timeout.
23:15
I am not sure which error is preferable.
23:23* johnny builds an initramfs
23:34
<subsume>
MacIver: I'm able to see other client requests for ltsp/i386/pxelinux.0 using wireshark
23:34
MacIver: but they time out
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23:44
<daya>
Hi, all is lenny uses ldm or sdm,
23:45
I am not prompted to GUI