IRC chat logs for #ltsp on irc.libera.chat (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
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| 13:39 | <jammcq> hey pscheie
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| 13:40 | <pscheie> hi there jammcq
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| 13:40 | I'm psyched about coming out for BTS!
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| 13:40 | <jammcq> cool. looking forward to it
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| 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.
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| 13:42 | And then carpool with anyone else flying in there or renting my own car.
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| 13:42 | <jammcq> that's fine. at this point tho, you'll be the only one
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| 13:42 | <pscheie> That's okay, not a big deal.
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| 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?
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| 13:48 | They usually come through BGR so perhaps I can carpool with them. If not, that's okay, too.
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| 13:51 | <jammcq> they are flying to BOS
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| 13:52 | I don't know if highvoltage is coming
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| 13:52 | highvoltage: ping
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| 14:53 | <highvoltage> japong
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| 14:53 | ja<tab>
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| 14:53 | pscheie: stgraber is going, I'll have to skip this year
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| 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
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| 15:07 | Encountering the following message just after TFTP stage:
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| 15:08 | "This kernel requires the following features not present on the CPU: pae cx8 cmov"
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| 15:08 | Last time I used LTSP was 4.1, the VIA system booted fine back then
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| 15:09 | Are the any repositories of pre built LTSO kernels that I could just download?
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| 15:09 | <pscheie> stgraber, are you going to ride with jammcq in the rental van from BOS?
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| 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
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| 15:14 | so yeah, Simon and I will be on that one
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| 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
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| 15:15 | well, usually the config is in /proc/config.gz. i would assume all "normal distro" kernels do that
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| 15:16 | <rbassett> where is the source of the ltsp kernel stored on the server file system?
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| 15:19 | <workingcats> dont know
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| 15:19 | i think the answer is "depends"
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| 15:21 | <Hyperbyte> workingcats, 'change the processor setting'?
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| 15:22 | <workingcats> Hyperbyte, in the kernel
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| 15:22 | make menuconfig
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| 15:22 | *for
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| 15:23 | <Hyperbyte> Ah
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| 15:23 | rbassett, there is no "LTSP kernel"
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| 15:24 | LTSP uses regular kernel from the distro it is installed with for the clients.
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| 15:24 | That's also why you're not going to find a source for the kernel, it simply uses the binary packages.
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| 15:25 | So you can compile your own kernel in the LTSP chroot and copy the binaries to /var/lib/tftpboot/ltsp/i386/
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| 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. ;-)
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| 15:27 | <jammcq> hey friends
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| 15:31 | <stgraber> hey jammcq
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| 15:40 | <jammcq> hey stgraber
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| 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?
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| 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?
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| 16:16 | <vagrantc> you would need to set up xrdp
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| 16:17 | though that's not really speific to LTSP- you could install that on any computer
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| 16:18 | Guest58988: you're talking about conecting to your LTSP server from a windows machne?
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| 16:19 | LTSP thin clients can also connect to an RDP server, such as windows using xfreerdp or rdesktop
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| 16:21 | <pscheie> vagrantc, are you coming to BTS?
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| 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!!!!)
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| 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?
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| 19:09 | anything contrary to normal ltsp tuning practices perhaps
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| 19:11 | <Hyperbyte> other_ot1er_joe, are you using NFS instead of NBD?
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| 19:11 | Or are you just using NFS for the home dirs?
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| 19:13 | <other_ot1er_joe> I'm talking the home directories specifically
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| 19:14 | I am using NFS instead of NBD though
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| 19:14 | for now
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| 19:14 | at least
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| 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
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| 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?
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| 19:52 | I'm trying to make things as highly available as possible
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| 19:52 | <alkisg> xnbd supports fault tolerance with multiple servers etc
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| 19:52 | But all that doesn't matter since ssh doesn't
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| 19:53 | It doesn't matter much if your client stays up after your session dies...
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| 19:56 | <other_ot1er_joe> right
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| 19:56 | I was actually wondering about the need for a master socket actually if I'm using fat clients
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| 19:57 | <alkisg> With SSHFS or with NFS?
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| 19:57 | <other_ot1er_joe> nfs
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| 19:58 | <alkisg> With NFS /home (using FSTAB_1 in lts.conf), it's only there for authentication + remote apps
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| 19:58 | <other_ot1er_joe> right
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| 19:58 | ldm spawns the sesssion and authenticates
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| 19:58 | but then the session remains
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| 19:58 | <alkisg> Right, so if you're not using remote apps, you don't really need the socket
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| 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?
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| 20:00 | <alkisg> What about /home/username?
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| 20:00 | <other_ot1er_joe> they're on a seperate drbd mirror
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| 20:00 | just for them
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| 20:01 | homes I mean
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| 20:01 | <alkisg> So you're not using NFS for /home, but DRBD?
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| 20:02 | <other_ot1er_joe> on no, they're still mounted via nfs
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| 20:02 | drbd just keep the two boxes mirrored
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| 20:02 | keeps\
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| 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
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| 20:03 | <alkisg> And NFS works fine with 2 synced servers?
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| 20:03 | <other_ot1er_joe> well, in theory. I've not yet tried to failover
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| 20:03 | the threads will probably all hang
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| 20:05 | since nbd uses tcp/ip though, I was wondering if I should have the same concern
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| 20:06 | the single ltsp server I'd like to ultimately mirror and put behind an LVS gateway
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| 20:06 | I think
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| 20:06 | <alkisg> I don't think that NBD supports load balancing/failover, but I think both XNBD and DRBD do
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| 20:07 | But if you manage NFS failover, you could just use that for root too..
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| 20:09 | <other_ot1er_joe> True. I was hoping to use NBD eventually because it's faster
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| 20:09 | Apparently
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| 20:09 | Not at the cost of high availability though I guess
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| 20:09 | <alkisg> NBD is compressed, which makes for 2.5 times the speed,
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| 20:09 | (well actually squashfs is,)
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| 20:10 | ...but you can compress 2 times with btrfs... as long as it's still served compressed over the network...
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| 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
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| 20:11 | * alkisg is reading http://www.pnfs.com/ | |
| 20:12 | <other_ot1er_joe> hmm, that's interesting
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| 20:12 | thanks
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| 20:12 | <alkisg> Btw, if your clients have local storage, you can cache the nbd image locally on them
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| 20:12 | <other_ot1er_joe> I was considering that
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| 20:13 | to sd flash
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| 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?
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| 20:14 | <alkisg> !local-nbd
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| 20:14 | <ltsp`> Error: "local-nbd" is not a valid command.
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| 20:14 | <alkisg> Meh I don't remember how I named that factoid...
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| 20:14 | <other_ot1er_joe> haha
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| 20:15 | !
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| 20:15 | <alkisg> The initscripts already support local-mounted NBD image, and then you only need a script for the syncing part
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| 20:15 | <other_ot1er_joe> can I just dump all factoids somehow? I would mind reading them all :)
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| 20:16 | <alkisg> !local-boot
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| 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
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| 20:17 | <other_ot1er_joe> I could just add the sync script to ltsp-init I suppose
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| 20:17 | sweet, thx
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| 20:18 | <alkisg> np
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| 20:18 | Do share when you do it :)
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| 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
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| 20:36 | <Hyperbyte> !alkisg
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| 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
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| 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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