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How do I make the clients default boot fallback not unity? LTSP installed on ubu14server with edubuntu client images.
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alkisg: tnx so far for help. ltsp-pnp runs perfect. though, I do have some issues with booting the clients from time to time.
I guess this is because I am running ltsp-pnp from within an xen vm.
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Nope, that shouldn't matter
Just mention the exact message that you see
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?
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.
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'
because of this unstable behaviour I want to try to move the pxe part to dhcp server....
nbd-server-bug: nbd-server hanging bug: https://github.com/yoe/nbd/commit/741495cb08503fd32a9d22648e63b64390c601f4, solved in version 3.4-1
Nah not that one either
!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
The operation succeeded.
BuddyButterfly: that ^ one
It's not related to using a VM, it's just an nbd-client bug
alkisg: oh, really? so much information now ;-) ok, will have a look into it.
alkisg: will be short afk, fon.....
alkisg: ok, executed that command. and indeed, I do have 16.04 (Xubuntu).
so this means that nbd client breaks network manager and gives troubles with the network interface?
alkisg: am I able to recreate image while clients are running?
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alkisg: ah, perfect, will do now....
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alkisg: yep, worked! Great. Will let you know if the patch worked out in the next days.
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?
BuddyButterfly: dnsmasq is also used for tftp, so don't remove it
You can disable its proxydhcp services by just removing the dhcp-range= lines
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alkisg: ah, very good, these are exactly the hints that I needed. but I am running hpa-tftp.....
or the like, let me have a look
alkisg: sry, it is vice versa: tftp-hpa ;-)
so I do not think that dnsmasq provides tftp, does it?
at least, if my tftp does not run, then nothing works ;-)
alkisg: ok, I see, there is a tftp-root in dnsmasq conf.
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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BuddyButterfly: if you followed the ltsp-pnp page, I'm not sure why you ended up with tftpd-hpa
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
alkisg: me neither ;-) maybe I have made a mistake somehow.
obviously both is activated on my side.
BuddyButterfly: if you have a race condition with 2 tftpd servers, it's an additional problem that adds to your server instability
Only one of them can be running
The first that will start
alkisg: aha, this makes sense.
I see dnsmasq running on local interface? -I lo
BuddyButterfly: well anyway, just follow the ltsp-pnp wiki page steps to have a proper installation
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
Remove it then, don't disable it
BuddyButterfly: do you have the dnsmasq package installed?
Or is it only dnsmasq-base?
dpkg -l '*dnsmasq*'|grep ^ii
ok, then yes remove tftpd-hpa
I guess I do have to set then bind-interfaces in ltsp-server-dnsmasq.conf also?
No, that makes dnsmasq unstable
I have 2 dnsmasq processes running. 1 under network manager and one stand alone.
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 :)
alkisg: ok, I will check to get it like this.
can you privde the link again so that I get the correct one?
tnx. will check it and remove tftp-hpa.....
hihi, tnx to epoptes, I am able to control the clients now remotely.....
even 2 screen setup works.....
alkisg: tftp-hpa is a hog
it wants to remove also ltsp-client and client-core and also nbd-client, etc....
lots of ltsp stuff.
I do not feel comfortable with this.
lot of dependencies.
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alkisg: it came in with ltsp-client-core which directly depends on tftp-hpa
if I remove tftp-hpa, ltsp-client-core gets also removed and this drags a whole lot more....
so it was not a fault of documentation but of package dependencies.
I guess then I have to try to disable it instead of removing...
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BuddyButterfly: remove tftpd-hpa , not tftp-hpa
tftp-hpa is the client and is needed to fetch lts.conf
tftpd-hpa is the server which conflicts with dnsmasq
this little character d....
ok, cross fingers. tftpd removed.....
argh, now there is no process listening on :69 anymore.
will try to start the client...
alkisg: now it hangs on tftp. there is no tftp running anymore
I will check if I have all packages like in your wiki.... but the enable-tftp in dnsmasq obviously does not work.
BuddyButterfly: now try: sudo service dnsmasq restart
and see if it starts
If it doesn't, follow the rest of the wiki, because that would mean you only did part of it
ok, will try.
checked packages. they are ok.
yep, now it is started.
alkisg: I am sorry, but no luck!
I checked every part on the wiki
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.
alkisg: any other idea, why it does not do tftp from boot?
BuddyButterfly: do you mean that client boot fails now? What is the exact error message?
tftp: Here's a page to help you troubleshoot TFTP problems in Ubuntu: https://help.ubuntu.com/community/UbuntuLTSP/Troubleshooting/TFTP
You can check from any client, if tftp is working or not
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