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


Channel log from 14 February 2017   (all times are UTC)

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03:48
<Gpteach>
How do I make the clients default boot fallback not unity? LTSP installed on ubu14server with edubuntu client images.
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10:09
<BuddyButterfly>
hi
10:09
<alkisg>
Hello
10:09
<BuddyButterfly>
alkisg: tnx so far for help. ltsp-pnp runs perfect. though, I do have some issues with booting the clients from time to time.
10:10
I guess this is because I am running ltsp-pnp from within an xen vm.
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10:10
<alkisg>
Nope, that shouldn't matter
10:11
Just mention the exact message that you see
10:11
<BuddyButterfly>
therefore I would like to migrate the pxe to my central dhcp server. What do I have to note on specialities? Is all I have to do to remove the dnsmasq from ltsp server?
10:12
I guess sometimes this vm has issues not getting an IP. Also, sometimes, it gets an IP, can be accessed but the clients can not start. only after vm-reboot it works then.
10:12
<alkisg>
!nbd
10:12
<ltsp>
I do not know about 'nbd', but I do know about these similar topics: 'disable-nbd-proxy', 'nbd-proxy', 'nbd-compression', 'quick-nbd-tests', 'nbd-client', 'nbd-server-bug', 'nbd-trusty-bug'
10:12
<alkisg>
!nbd-trusty-bug
10:12
<ltsp>
nbd-trusty-bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1330671
10:13
<BuddyButterfly>
because of this unstable behaviour I want to try to move the pxe part to dhcp server....
10:13
<alkisg>
Nope
10:13
!nbd-server-bug
10:13
<ltsp>
nbd-server-bug: nbd-server hanging bug: https://github.com/yoe/nbd/commit/741495cb08503fd32a9d22648e63b64390c601f4, solved in version 3.4-1
10:13
<alkisg>
Nah not that one either
10:14
!learn nbd-client-breaks-nm as run this command to bypass an issue in 16.04: sudo dpkg-divert --divert /etc/nbd-client.init --rename /etc/init.d/nbd-client
10:14
<ltsp>
The operation succeeded.
10:14
<alkisg>
BuddyButterfly: that ^ one
10:14
It's not related to using a VM, it's just an nbd-client bug
10:15
<BuddyButterfly>
alkisg: oh, really? so much information now ;-) ok, will have a look into it.
10:24
alkisg: will be short afk, fon.....
11:12
alkisg: ok, executed that command. and indeed, I do have 16.04 (Xubuntu).
11:12
so this means that nbd client breaks network manager and gives troubles with the network interface?
11:13
<alkisg>
yup
12:07
<BuddyButterfly>
alkisg: am I able to recreate image while clients are running?
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13:00
<alkisg>
BuddyButterfly: yup
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13:27
<BuddyButterfly>
alkisg: ah, perfect, will do now....
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14:11
<BuddyButterfly>
alkisg: yep, worked! Great. Will let you know if the patch worked out in the next days.
14:13
alkisg: btw. longterm I would like to manage the pxe boot menu etc. on my central dhcp also for other systems. What would be the rough steps? I am using isc-dhcp as dhcp-server. Is it enought to remove dnsmasq?
14:13
<alkisg>
BuddyButterfly: dnsmasq is also used for tftp, so don't remove it
14:13
You can disable its proxydhcp services by just removing the dhcp-range= lines
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15:28
<BuddyButterfly>
alkisg: ah, very good, these are exactly the hints that I needed. but I am running hpa-tftp.....
15:28
or the like, let me have a look
15:29
alkisg: sry, it is vice versa: tftp-hpa ;-)
15:29
so I do not think that dnsmasq provides tftp, does it?
15:30
at least, if my tftp does not run, then nothing works ;-)
15:32
alkisg: ok, I see, there is a tftp-root in dnsmasq conf.
15:37
alkisg: is it possible that I do have a misconfiguration here? tftp is enabled in dnsmasq (enable-tftp) but also tftp-hpa is configured in /etc/default/tftp-hpa to the same root and both enabled.
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16:31
<alkisg>
BuddyButterfly: if you followed the ltsp-pnp page, I'm not sure why you ended up with tftpd-hpa
16:31
!ltsp-pnp
16:31
<ltsp>
ltsp-pnp: ltsp-pnp is an alternative (upstream) method to maintain LTSP installations for thin and fat clients that doesn't involve chroots: https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
16:32
<BuddyButterfly>
alkisg: me neither ;-) maybe I have made a mistake somehow.
16:33
obviously both is activated on my side.
16:33
<alkisg>
BuddyButterfly: if you have a race condition with 2 tftpd servers, it's an additional problem that adds to your server instability
16:33
Only one of them can be running
16:33
The first that will start
16:33
<BuddyButterfly>
alkisg: aha, this makes sense.
16:34
I see dnsmasq running on local interface? -I lo
16:34
<alkisg>
BuddyButterfly: well anyway, just follow the ltsp-pnp wiki page steps to have a proper installation
16:36
<BuddyButterfly>
ok. I think I have to try to disable tftp-hpa. I am sure it was on some documetation like ltsppnp ubuntu wiki or the like
16:37
<alkisg>
Remove it then, don't disable it
16:37
BuddyButterfly: do you have the dnsmasq package installed?
16:37
Or is it only dnsmasq-base?
16:38
<BuddyButterfly>
will check...
16:38
<alkisg>
dpkg -l '*dnsmasq*'|grep ^ii
16:38
<BuddyButterfly>
both
16:38
<alkisg>
ok, then yes remove tftpd-hpa
16:39
<BuddyButterfly>
I guess I do have to set then bind-interfaces in ltsp-server-dnsmasq.conf also?
16:39
<alkisg>
No, that makes dnsmasq unstable
16:39
<BuddyButterfly>
I have 2 dnsmasq processes running. 1 under network manager and one stand alone.
16:40
<alkisg>
Please follow the ltsp-pnp wiki page, I spent a lot of time to write all the steps there, so that I don't have to do it for each person separately :)
16:40
<BuddyButterfly>
alkisg: ok, I will check to get it like this.
16:40
<alkisg>
Nice :
16:41
<BuddyButterfly>
can you privde the link again so that I get the correct one?
16:41
<alkisg>
!ltsp-pnp
16:41
<ltsp>
ltsp-pnp: ltsp-pnp is an alternative (upstream) method to maintain LTSP installations for thin and fat clients that doesn't involve chroots: https://help.ubuntu.com/community/UbuntuLTSP/ltsp-pnp
16:45
<BuddyButterfly>
tnx. will check it and remove tftp-hpa.....
16:47
hihi, tnx to epoptes, I am able to control the clients now remotely.....
16:47
even 2 screen setup works.....
16:50
alkisg: tftp-hpa is a hog
16:51
it wants to remove also ltsp-client and client-core and also nbd-client, etc....
16:51
lots of ltsp stuff.
16:51
I do not feel comfortable with this.
16:51
lot of dependencies.
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16:57
<BuddyButterfly>
alkisg: it came in with ltsp-client-core which directly depends on tftp-hpa
16:57
if I remove tftp-hpa, ltsp-client-core gets also removed and this drags a whole lot more....
16:57
so it was not a fault of documentation but of package dependencies.
16:58
I guess then I have to try to disable it instead of removing...
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17:08
<alkisg>
BuddyButterfly: remove tftpd-hpa , not tftp-hpa
17:08
tftp-hpa is the client and is needed to fetch lts.conf
17:08
tftpd-hpa is the server which conflicts with dnsmasq
17:09
<BuddyButterfly>
ahhhh
17:09
this little character d....
17:11
ok, cross fingers. tftpd removed.....
17:13
argh, now there is no process listening on :69 anymore.
17:13
will try to start the client...
17:16
alkisg: now it hangs on tftp. there is no tftp running anymore
17:16
I will check if I have all packages like in your wiki.... but the enable-tftp in dnsmasq obviously does not work.
17:21
<alkisg>
BuddyButterfly: now try: sudo service dnsmasq restart
17:21
and see if it starts
17:22
If it doesn't, follow the rest of the wiki, because that would mean you only did part of it
17:25
<BuddyButterfly>
ok, will try.
17:25
checked packages. they are ok.
17:25
yep, now it is started.
17:34
alkisg: I am sorry, but no luck!
17:34
I checked every part on the wiki
17:35
I also did the stuff with the dns server. but did not work also. I do not want the ltsp server to be dns server, so I guess I can leave that away.
17:35
alkisg: any other idea, why it does not do tftp from boot?
18:43
<alkisg>
BuddyButterfly: do you mean that client boot fails now? What is the exact error message?
18:43
!tftp
18:43
<ltsp>
tftp: Here's a page to help you troubleshoot TFTP problems in Ubuntu: https://help.ubuntu.com/community/UbuntuLTSP/Troubleshooting/TFTP
18:44
<alkisg>
You can check from any client, if tftp is working or not
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