IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 9 March 2016 (all times are UTC)
| 02:30 | <sbalneav> No, functionally they're identical. The only reason would be if you needed features in webkit2 over webkit
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| 08:58 | <lliurex-server> no puedo desbloquear internet
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| 10:42 | <johnson> Hi
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| 10:42 | <alkisg> Hello
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| 17:58 | <alkisg> vagrantc: Hello! Question... sch-scripts recommends: ltsp-server, ltsp-client etc. And sch-scripts.postinst does: if [ ! -d /boot/pxelinux.cfg ]; then /usr/share/ltsp/update-kernels; fi
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| 17:58 | The problem I've seen is that sometimes /boot/pxelinux.cfg/ltsp is generated with NFS first, like if /etc/ltsp/update-kernels.conf => BOOT_METHODS was missing at the time update-kernels was called!
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| 17:58 | I can't think how that's possible, can you imagine any way for sch-scripts.postinst to get to run before /etc/ltsp/update-kernels.conf gets installed?!
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| 18:00 | To work around the issue, whatever that may be, would you mind if I changed this? ./client/share/ltsp/update-kernels:BOOT_METHODS=${BOOT_METHODS:-"NFS NBD AOE"}
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| 18:00 | ...to have NBD first?
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| 18:00 | That way even if update-kernels.conf isn't present, NBD will still come first
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| 18:01 | The problematic pxelinux.cfg/ltsp is: http://paste.debian.net/413696/
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| 18:02 | Hmm it doesn't even have the correct kernels there...
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| 18:04 | Yup, if I remove /etc/ltsp/update-kernels.conf and run /usr/share/ltsp/update-kernels, then I can reproduce that specific pxelinux.cfg/ltsp file
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| 18:04 | But how it's possible for /usr/share/ltsp/update-kernels to exist while /etc/ltsp/update-kernels.conf does not exist, when both files are in ltsp-client-core, is beyond me...
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| 18:13 | vagrantc: I guess my question is, when ltsp-client-core is "unpacked" but not "configured" yet, does /etc/ltsp/update-kernels.conf exist?
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| 18:14 | How would I even check that? By writing a preinst script that runs `ls /etc/ltsp`?
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| 18:26 | <vagrantc> wow
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| 18:27 | alkisg: why not just always run update-kernels ?
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| 18:49 | <alkisg> vagrantc: I do always run update-kernels from sch-scripts.postinst, but some times at that poin update-kernels.conf doesn't exist, and produces the wrong pxelinux.cfg/ltsp
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| 18:50 | <vagrantc> pre-depends on ltsp-client-core ?
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| 18:50 | <alkisg> err I mean, the problem is not that it doesn't run some times, it is that when it runs, it some times causes issues
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| 18:50 | no, sch-scripts just recommends ltsp-client
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| 18:50 | Should I make that predepends instead?
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| 18:50 | <vagrantc> or maybe just depends, in that case ...
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| 18:50 | i'm not *sure* pre-depends will help ... generally to be avoided
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| 18:51 | <alkisg> I can't see how depends will be different from recommends though, as update-kernels is there... it's update-kernels that's missing
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| 18:51 | And I don't even know how that's possible, unless files under /etc get special treatment even if they're shipped and not generated on postinst
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| 18:52 | *it's update-kernels.conf that's missing, sorry
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| 18:53 | It's also strange that it *sometimes* happens, not always... like a race condition somewhere
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| 18:53 | <vagrantc> yeah, i get that ... files in /etc are sometimes treated as special snowflakes ... but i would expect them to be unpacked when the rest of the package files are unpacked
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| 18:54 | <alkisg> Hmm maybe I could test if /etc/ltsp/update-kernels.conf doesn't exist, then sch-scripts.postinst should not call update-kernels... at least that will mitigate the issue
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| 18:55 | <vagrantc> hrm.
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| 19:10 | <alkisg> stgraber: there are a few fixes after the ltsp version that we got in 16.04. What's the last date that we can sync those with xenial? March 24th? https://wiki.ubuntu.com/XenialXerus/ReleaseSchedule
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| 19:11 | For example, some systemd update yesterday broke getltscfg with non-ascii content in lts.conf, so it'd be nice to have that fix in 16.04...
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| 19:12 | (r2715 in ltsp-trunk)
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| 19:44 | <alkisg> vagrantc: http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/2716
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| 19:44 | ...what's the purpose of "eval" there?!
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| 19:44 | Doesn't that evaluate an empty string?
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| 19:45 | getltscfg -a gets the values, grep discards the "export" lines, and >> gets them to ltsp_config_env
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| 19:45 | There's nothing in stdout to be evaluated...
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| 19:54 | <vagrantc> alkisg: artifact of history, i guess.
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| 19:54 | <alkisg> vagrantc: should I remove that?
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| 19:55 | Maybe a "tee" was meant there, to duplicate the >> to stdout
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| 19:56 | <vagrantc> you wouldn't want to exclude "export" then
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| 19:57 | <alkisg> Well actually the variables shouldn't be exported in the environment...
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| 19:57 | But sure, ok, let's not ask for trouble :)
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| 20:00 | <vagrantc> that would be a rewrite
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| 20:00 | the current implementation relies on the variables being exported for some features
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| 20:01 | <alkisg> Usually the ltsp scripts are sourced, not executed, so they don't need the vars to be exported, but I imagine there might be a couple of cases where they're executed
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| 20:02 | <vagrantc> or programs they're running on need them, etc.
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| 20:02 | it's been that way since before LTSP5 was called LTSP5 ... i don't think it makes sense to change it and still call it LTSP5
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| 20:03 | <alkisg> CLIENT_ENV is not related to exported variables
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| 20:03 | No I mean that I think that if we just omit the export, it'll still work
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| 20:03 | Without changing any code anywhere...
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| 20:03 | <vagrantc> i think there will be subtle breakages
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| 20:04 | and hard to track down
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| 20:04 | was fairly sure the screen scripts executed, too
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| 20:04 | <alkisg> Yup, that part would be a pain, if it broke in 1-2 places
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| 20:04 | The screen scripts source ltsp_config
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| 20:04 | So they get the vars without needing them exported
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| 20:05 | <vagrantc> i'm not sure what we really gain by making changes like that
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| 20:05 | <alkisg> Sure, that was just theoretical, I wasn't suggesting that I want us to work on that
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| 20:06 | <vagrantc> on the other hand, maybe it's already accidentally broken by the code you pointed out, and it's working as well as it's working :)
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| 20:06 | <alkisg> But also in theory, it's not nice to have child processes have all the ltsp vars
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| 20:06 | <vagrantc> yeah, i get that
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| 20:06 | it's time to make LTSP6 happen, and apply what we've learned all these years :)
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| 20:07 | * alkisg isn't sure it'll be ltsp if we apply all that we've learned :) | |
| 20:07 | <alkisg> Maybe just "configd"...
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| 20:08 | Also, I'm not sure that ltsp6 will ever happen without some sponsorship...
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