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


Channel log from 20 September 2013   (all times are UTC)

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02:46
<jammcq>
hey all
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13:39
<pscheie>
Good morning all
13:39
<jammcq>
hey pscheie
13:40
<pscheie>
hi there jammcq
13:40
I'm psyched about coming out for BTS!
13:40
<jammcq>
cool. looking forward to it
13:41
<pscheie>
I think that rather than you folks in the rental van contorting your schedule to accomodate me, it will be eaiser for me to just fly to BGR.
13:42
And then carpool with anyone else flying in there or renting my own car.
13:42
<jammcq>
that's fine. at this point tho, you'll be the only one
13:42
<pscheie>
That's okay, not a big deal.
13:42
The cost is about the same, and this way I don't have to get up at 3am.
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13:48
<pscheie>
What have you heard from stgraber or highvoltage?
13:48
They usually come through BGR so perhaps I can carpool with them. If not, that's okay, too.
13:51
<jammcq>
they are flying to BOS
13:52
I don't know if highvoltage is coming
13:52
highvoltage: ping
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14:53
<highvoltage>
japong
14:53
ja<tab>
14:53
pscheie: stgraber is going, I'll have to skip this year
14:59
<stgraber>
pscheie: simpoir and I will be flying to BOS this year but still need to figure out how to get to SW Harbor from there since neither of us have driver's license
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15:07
<rbassett>
Hi folks, trying to boot an old VIA system using LTSP
15:07
Encountering the following message just after TFTP stage:
15:08
"This kernel requires the following features not present on the CPU: pae cx8 cmov"
15:08
Last time I used LTSP was 4.1, the VIA system booted fine back then
15:09
Are the any repositories of pre built LTSO kernels that I could just download?
15:09
<pscheie>
stgraber, are you going to ride with jammcq in the rental van from BOS?
15:11
<stgraber>
pscheie: probably not, jammcq said it'd already be full at that point, so looking for someone who also gets into BOS and can rent a car/van from there to BTS and back
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15:14
<stgraber>
pscheie: oh, actually just got an e-mail from Jim saying he'll rent a 12-passenger van in BOS
15:14
so yeah, Simon and I will be on that one
15:15
<workingcats>
rbassett, you could boot another system with the current kernel, then get the config file from /proc/config.gz, and simply change the processor setting and recompile the kernel
15:15
well, usually the config is in /proc/config.gz. i would assume all "normal distro" kernels do that
15:16
<rbassett>
where is the source of the ltsp kernel stored on the server file system?
15:19
<workingcats>
dont know
15:19
i think the answer is "depends"
15:21
<Hyperbyte>
workingcats, 'change the processor setting'?
15:22
<workingcats>
Hyperbyte, in the kernel
15:22
make menuconfig
15:22
*for
15:23
<Hyperbyte>
Ah
15:23
rbassett, there is no "LTSP kernel"
15:24
LTSP uses regular kernel from the distro it is installed with for the clients.
15:24
That's also why you're not going to find a source for the kernel, it simply uses the binary packages.
15:25
So you can compile your own kernel in the LTSP chroot and copy the binaries to /var/lib/tftpboot/ltsp/i386/
15:25
Or you can use a distro/version that does not require cmov
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15:27
<Hyperbyte>
You could actually use a completely different distro for the client, as long as the LTSP version for client and server match somewhat. ;-)
15:27
<jammcq>
hey friends
15:31
<stgraber>
hey jammcq
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15:40
<jammcq>
hey stgraber
15:40
got your email
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16:04
<Guest58988>
new to LSTP. got PXE working. However, wondering how to connect via a windows OS workstation. Is it ready out of the box, or do I need to cofigure something?
16:05
I'm thinking PUTTY SSH X session, but I've never done that.
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16:12
<Guest58988>
I see some information that i can RDP (With windows Remote Desktop) diretly to my LTSP server. Is that true?
16:16
<vagrantc>
you would need to set up xrdp
16:17
though that's not really speific to LTSP- you could install that on any computer
16:18
Guest58988: you're talking about conecting to your LTSP server from a windows machne?
16:19
LTSP thin clients can also connect to an RDP server, such as windows using xfreerdp or rdesktop
16:21
<pscheie>
vagrantc, are you coming to BTS?
16:24
<Guest58988>
Thanks @vagrantc. In the ubuntu 12.04 standard install of LTSP, i would then need to setup xrdp? I'm talking about connecting from windows to LTSP.
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16:31
<Guest58988>
wow. I installed xrdp, and connected, in about 2 minutes. Super easy. Thanks linux developers of the world!!! (specifically LTSP and xrdp!!!!)
16:31
<vagrantc>
glad it worked for you
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19:08
<other_ot1er_joe>
Anyone have any experience with NFS tuning specifically in relation to ltsp they wanna lay on me?
19:09
anything contrary to normal ltsp tuning practices perhaps
19:11
<Hyperbyte>
other_ot1er_joe, are you using NFS instead of NBD?
19:11
Or are you just using NFS for the home dirs?
19:13
<other_ot1er_joe>
I'm talking the home directories specifically
19:14
I am using NFS instead of NBD though
19:14
for now
19:14
at least
19:15
It's just easier to fiddle with while it's running. Once I setting on a hard config though I'll probably move to NBD
19:15
settle\
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19:51
<other_ot1er_joe>
speaking of NBD, can anyone school me a bit on NBD vs NFS in terms of fault tolerance?
19:52
I'm trying to make things as highly available as possible
19:52
<alkisg>
xnbd supports fault tolerance with multiple servers etc
19:52
But all that doesn't matter since ssh doesn't
19:53
It doesn't matter much if your client stays up after your session dies...
19:56
<other_ot1er_joe>
right
19:56
I was actually wondering about the need for a master socket actually if I'm using fat clients
19:57
<alkisg>
With SSHFS or with NFS?
19:57
<other_ot1er_joe>
nfs
19:58
<alkisg>
With NFS /home (using FSTAB_1 in lts.conf), it's only there for authentication + remote apps
19:58
<other_ot1er_joe>
right
19:58
ldm spawns the sesssion and authenticates
19:58
but then the session remains
19:58
<alkisg>
Right, so if you're not using remote apps, you don't really need the socket
20:00
<other_ot1er_joe>
so could I safely use LVS and drbd or something to keep the NBD connection alive in case of failure?
20:00
<alkisg>
What about /home/username?
20:00
<other_ot1er_joe>
they're on a seperate drbd mirror
20:00
just for them
20:01
homes I mean
20:01
<alkisg>
So you're not using NFS for /home, but DRBD?
20:02
<other_ot1er_joe>
on no, they're still mounted via nfs
20:02
drbd just keep the two boxes mirrored
20:02
keeps\
20:03
I have, at this time, 1 server handling tfp, dhcp, and the ltsp image, and a seperate pair of servers just for /home
20:03
<alkisg>
And NFS works fine with 2 synced servers?
20:03
<other_ot1er_joe>
well, in theory. I've not yet tried to failover
20:03
the threads will probably all hang
20:05
since nbd uses tcp/ip though, I was wondering if I should have the same concern
20:06
the single ltsp server I'd like to ultimately mirror and put behind an LVS gateway
20:06
I think
20:06
<alkisg>
I don't think that NBD supports load balancing/failover, but I think both XNBD and DRBD do
20:07
But if you manage NFS failover, you could just use that for root too..
20:09
<other_ot1er_joe>
True. I was hoping to use NBD eventually because it's faster
20:09
Apparently
20:09
Not at the cost of high availability though I guess
20:09
<alkisg>
NBD is compressed, which makes for 2.5 times the speed,
20:09
(well actually squashfs is,)
20:10
...but you can compress 2 times with btrfs... as long as it's still served compressed over the network...
20:11
...and it has less metadata... so even with the same compression NBD is still faster than NFS, but at least not that much
20:11* alkisg is reading http://www.pnfs.com/
20:12
<other_ot1er_joe>
hmm, that's interesting
20:12
thanks
20:12
<alkisg>
Btw, if your clients have local storage, you can cache the nbd image locally on them
20:12
<other_ot1er_joe>
I was considering that
20:13
to sd flash
20:13
are there any params I can put in the lts.conf to quickly acheive that or do I have to figure my own way?
20:14
<alkisg>
!local-nbd
20:14
<ltsp`>
Error: "local-nbd" is not a valid command.
20:14
<alkisg>
Meh I don't remember how I named that factoid...
20:14
<other_ot1er_joe>
haha
20:15
!
20:15
<alkisg>
The initscripts already support local-mounted NBD image, and then you only need a script for the syncing part
20:15
<other_ot1er_joe>
can I just dump all factoids somehow? I would mind reading them all :)
20:16
<alkisg>
!local-boot
20:16
<ltsp`>
local-boot: If you want LTSP fat clients on a low-speed network, you can put i386.img on e.g. C:\Boot\LTSP\i386.img and use this command line in pxelinux.cfg: APPEND ro initrd=ltsp/i386/initrd.img init=/sbin/init-ltsp root=/dev/sda1 rootflags=ro loop=/Boot/LTSP/i386.img; IPAPPEND 3
20:17
<other_ot1er_joe>
I could just add the sync script to ltsp-init I suppose
20:17
sweet, thx
20:18
<alkisg>
np
20:18
Do share when you do it :)
20:19
<other_ot1er_joe>
haha, will do. Thanks for all the pointers btw. I really appreciate being able to come somewhere and ask for advise
20:36
<Hyperbyte>
!alkisg
20:36
<ltsp`>
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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21:32
<other_ot1er_joe>
!local-boot
21:32
<ltsp`>
local-boot: If you want LTSP fat clients on a low-speed network, you can put i386.img on e.g. C:\Boot\LTSP\i386.img and use this command line in pxelinux.cfg: APPEND ro initrd=ltsp/i386/initrd.img init=/sbin/init-ltsp root=/dev/sda1 rootflags=ro loop=/Boot/LTSP/i386.img; IPAPPEND 3
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22:42
<matthias_android>
Im running Ubuntu 12.04 fat clients and having the poweroff bug. The computer stops at checking battery state and does not continue powering off
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