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Channel log from 29 July 2015 (all times are UTC)

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14:12	<brianr_> Good Morning All!
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14:13	<brianr_> I just set up a new LTS instance on Ubuntu 14.04 LTS, it works very nicely for our purposes. However I have one issue right now, and that is that the thin client's hostname is being generated randomly and not using DNS
14:13	i have googled ... but cannot quite find a way to force it to lookup the address
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14:14	<brianr_> anyone?
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15:32	<Faith> brianr_, what order is on the chroot client /etc/host.conf ?
15:32	brianr_, verify if it is: order bind,hosts
15:33	<brianr_> ah it is hosts, bind
15:35	<Faith> try to change to bind,host
15:35	bind,hosts *
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15:38	<alkisg> brianr_: are you using ipappend 3?
15:38	<brianr_> yes
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15:38	<alkisg> Then the client is not making a dhcp request
15:38	So it's not receiving its DNS
15:39	Why are you using ipappend 3, do you have a router as the dhcp server?
15:40	<brianr_> i am using an external DHCP server
15:40	it is not the LTS box
15:40	<alkisg> Can you modify it to include bootname etc?
15:41	<brianr_> you mean, assign the hostname via the DHCP config?
15:42	<alkisg> For dhcp, you can either modify your existing dhcp server or use proxydhcp + ipappend 3 in the ltsp server
15:42	You're doing the second option, and that prevents the client from getting a dns name etc
15:43	You can assign the hostname in the dhcp config too, yes
15:43	But only if you stop using proxydhcp
15:43	And of course you can also set HOSTNAME=xxx in lts.conf
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15:52	<brianr_> this is our second lts box, the other one is ubuntu 13.10 and it uses the same dhcp server, but is pulling the correct hostname
15:52	it isnt using ipappend
15:53	<alkisg> LTS = Long Term Support, LTSP = Linux Terminal Server Project
15:53	<brianr_> i just removed ipappend from the new box and re-ordered the host.conf and it is still assigning a random hostname
15:53	<alkisg> So one is using ipappend 3 and the other doesn't?
15:53	What are the contents of host.conf?
15:53	I.e. how are you setting the hostname?
15:54	<brianr_> i am expecting the hostname to be set via DNS
15:54	order bind,hosts
15:54	multi on
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15:56	<brianr_> gonna try changing the DHCP server config
15:57	<alkisg> I don't understand how DNS will set the hostname without DHCP
15:58	If you're not using IPAPPEND 3, then the udhcpc client at initramfs does a DHCP request
15:58	In the reply, there's a DNS name, that the client writes to /etc/hostname
15:58	No reverse DNS lookups anywhere...
15:59	I don't see how your 13.10 LTSP box would work without DHCP hostnames either
16:01	<brianr_> so, the clients hit a DHCP server, but DHCP is all reservations. Each thin client has a hostname in DNS and is given the cooresponding IP based upon their mac address
16:07	hmm adding the option host-name didnt help
16:07	to the DHCP config
16:08	<alkisg> Do you mean that you have configured the DHCP server to do DNS lookups?
16:08	Then ok, that can work. What are the contents of this file on the client?
16:08	/var/cache/ltsp/net-eth0.conf
16:08	This is the file that contains the DHCP data
16:09	(including the hostname)
16:13	<brianr_> only the apv4 address, netmask, gateway, rootserver, and rootpath are populated
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16:14	<brianr_> that is with ipappend not set
16:14	<alkisg> What's the output of `cat /proc/cmdline`? Does it have an ip=xxx stanza?
16:15	<brianr_> yep
16:16	has the ip, gateway, mask, boot server
16:16	not seeing the DNS servers ...
16:16	<alkisg> Then ipappend 3 is in effect
16:17	You didn't manage to remove it from the correct pxelinux.cfg/default, probably...
16:17	Without ipappend 3, you shouldn't be getting an ip= stanza
16:19	<brianr_> here is a typical stanza for my DHCP server for the thin clients
16:19	host tc01 {
16:19	hardware ethernet 00:00:00:00:00:00;
16:19	fixed-address 192.168.1.1;
16:19	next-server 192.168.2.1;
16:19	option root-path "/opt/ltsp/i386";
16:19	filename "/ltsp/i386/pxelinux.0";
16:19	}
16:20	on our DNS server there is an entry for tc01
16:20	matching the fixed address here ..
16:21	when clients boot to existing 13.10 box, they get the real hostname on the login page, not the random ltspxxxx that clients get when they hit the new box
16:22	<alkisg> Is the 13.10 box an ltsp client?
16:22	Also, note that you're still using ipappend 3, which is surely an issue
16:22	Solve that certain problem first, then check if other problems still exist or not
16:23	<brianr_> ok, so i should remove ipappend 3
16:23	<alkisg> Yes
16:25	<brianr_> when i set that i put it in /etc/ltsp/update-kernels.conf and then ran update-kernels, so by removing it i am commenting it out and runnning update-kernels again ...
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16:26	<alkisg> Directly edit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default
16:26	Once you get it working, then try it with update-kernels.conf
16:26	Because it's a bit tricky...
16:27	<brianr_> i see there they are all set to ipappend 2
16:28	<alkisg> (07:16:13 μμ) brianr_: has the ip, gateway, mask, boot server
16:28	==> that's ipappend 3, not 2
16:28	ipappend 2 is BOOTIF=xxx
16:28	The end result is that when you boot the client, you won't see an ip=xxx entry in the /proc/cmdline
16:29	About your DHCP+DNS configuration, I think you're using "get-lease-hostnames true;", which should work fine without ipappend 3.
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16:37	<brianr_> use-host-decl-names is on yes
16:37	<alkisg> ...I'm writing one thing and you're reading another :)
16:39	<brianr_> if in the pxelinux.cfg/default if ipappend is set to 2 , where is it pulling 3 from?
16:39	<alkisg> If you're sure you've set it to 2, then maybe it's getting it from another path, e.g. /srv/tftp instead of /var/lib/tftp
16:40	Try adding a fake parameter, e.g. foo=bar, in pxelinux.cfg/default, to verify that you're editing the correct file
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16:40	<brianr_> well, i commented out ipappend and the thin client wouldnt boot
16:41	<alkisg> And with ipappend 2 it booted?
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16:42	<brianr_> nope , now nothing is booting
16:43	<alkisg> It is not booting at all, or are you getting and initramfs shell?
16:43	*an
16:43	<brianr_> shell
16:43	<alkisg> Then you have 2 dhcp servers
16:44	cat /tmp/net-eth0.conf will tell you the ip of your rogue dhcp server
16:44	or, ipconfig -n eth0
16:44	(in initramfs)
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16:47	<brianr_> nah it pulled from the right dhcp server
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16:51	<brianr_> nbd-server : requested export not found ..
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17:08	<alkisg> brianr_: did you actually see the contents of /tmp/net-eth0.conf in the initramfs?
17:08	ROOTSERVER there was correct?
17:09	What are the contents of /proc/cmdline now? Maybe you edited something wrong, e.g. root=/dev/nbd instead of root=/dev/nbd0?
17:28	<brianr_> nbd server is sort of flaky ...
17:29	we are back where we started from
17:31	<alkisg> Nah, I think we just have communication issues :)
17:32	As long as you have ip=xx in your kernel command line, you didn't manage to remove ipappend 3.
17:32	And ipappend 3 isn't required for booting when you have one dhcp server
17:33	That's your issue, try to solve it
17:34	<brianr_> ahh so ... when ndb-server crapped out i rebooted
17:35	well first i ran /usr/share/ltsp/update-kernels and lts-update-image,
17:35	then rebooted ...
17:36	now pxelinux.cfg/default shows ipappend=3
17:37	<alkisg> Again, edit it manually first
17:37	I don't know how to continue if you're not reading what I'm suggesting...
17:37	I think I'd better pause until you manage to figure out how to manually remove ipappend 3, without running ltsp-update-kernels etc.
17:37	<brianr_> just comment out ipappend=3 in pxelinux.cfg/default ?
17:37	<alkisg> Yes (for the 4th time... :-/)
17:38	<brianr_> update kernels?
17:39	<alkisg> No
17:40	<brianr_> drops to initramfs
17:41	<alkisg> Change ipappend 3 to ipappend 2 and reboot the client
17:41	Uncomment it
17:56	<brianr_> still dropping to initramfs
17:56	default ltsp-NBD
17:56	ontimeout ltsp-NBD
17:56	# This file is regenerated when update-kernels runs.
17:56	# Do not edit, see /etc/ltsp/update-kernels.conf instead.
17:56	label ltsp-NBD
17:56	menu label LTSP, using NBD
17:56	kernel vmlinuz-3.16.0-45-generic
17:56	append ro initrd=initrd.img-3.16.0-45-generic init=/sbin/init-ltsp quiet splash root=/dev/nbd0
17:56	ipappend 2
17:57	<alkisg> It's a dhcp issue
17:57	On the client, check /tmp/net-eth0.conf
17:57	And run `ipconfig -n eth0`
17:58	And before those, just `ip a`
17:58	You either have wrong dhcp server configuration, that doesn't reply properly when the client identifier is udhcpc, or you have another rogue dhcp server
18:00	<brianr_> there is no net-eth0.conf ... its a symlin to /run and it isnt there
18:00	but there is a dhcp-info.conf and all the info in there looks good, cept there isnt any referenceing the boot server
18:01	well, there is siaddr which is the LTSP box
18:02	and /proc/cmdline has no ip=, just a bootif
18:03	<alkisg> What does `ipconfig -n eth0` tell you?
18:03	Does it return rootserver=the ltsp server?
18:04	<brianr_> yup
18:05	<alkisg> The udhcpc script generates dhcp-info.conf
18:05	Then it translates it to net-eth0.conf
18:05	So if net-eth0.conf isn't there, it can't boot
18:06	Try to remove quit-splash. What is the last error message that you see?
18:06	!quiet-splash
18:06	<ltsp> quiet-splash: to disable the splash screen in Ubuntu, in order to see any boot error messages, run sudo gedit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and remove quiet splash plymouth:force-splash vt.handoff=7
18:07	<alkisg> You can also try to manually run /scripts/init-premount/udhcpc in the initramfs, and then check for net-eth0.conf again
18:08	In the end, /run/net-eth0.conf should have the correct ROOTSERVER for nbd-server to pick it up
18:08	I.e. the ltsp server's IP
18:10	<brianr_> running udhcpc yields RTNETLINK answers: File exists
18:10	<alkisg> That's just a warning, ignore it
18:10	Check the files
18:11	<brianr_> net-eth0.conf is now populated and everything looks good
18:12	<alkisg> Try removing quiet-splash and watching for the last error message
18:16	<brianr_> setting up nbd-client .... negotiation: .. Error: server closed connection
18:17	then it runs /scripts/local-premount which of course has some i/o errors
18:17	because nbd0 isnt there
18:17	<alkisg> In the place where quiet-splash was, put nbdroot=1.2.3.4
18:17	replace with your ltsp server's ip
18:20	Aaaah another possible issue
18:20	What's the value for ROOTPATH?
18:21	And, what are the contents of /etc/nbd-server/conf.d ?
18:21	<brianr_> putting nbdroot= didnt work, but it gives a different error
18:21	insufficient information to se up nbd
18:21	*set
18:22	<alkisg> Do answer the previous 2 questions, I think those are the issue...
18:23	And, which ubuntu version is this one?
18:23	14.04?
18:23	<brianr_> 14.04 yep
18:24	root path on dhcp server is /opt/ltsp/i386
18:24	<alkisg> head -n 1 /etc/nbd-server/conf.d/*
18:25	<brianr_> rootpath in dhcp-info.conf is full path to /opt/ltsp/images/i386.img
18:26	<alkisg> That's the issue
18:26	It needs to be the same as the header in nbd-server/conf.d/ltsp_i386.conf, e.g. [/opt/ltsp/i386]
18:27	Otherwise it can't locate the correct export
18:27	<brianr_> ==> /etc/nbd-server/conf.d/ltsp_i386.conf <==
18:27	[/opt/ltsp/i386]
18:27	==> /etc/nbd-server/conf.d/swap.conf <==
18:27	[swap]
18:27	<alkisg> So, dhcp issue, fix the rootpath in your dhcp server
18:27	Set it to /opt/ltsp/images
18:38	<brianr_> so, would ipappend hide the fact that the dhcp and nbd paths were not the same?
18:41	<alkisg> Yes, it makes it default to /opt/ltsp/i386
18:41	Since it doesn't get it from dhcp then
18:43	* alkisg waves
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19:00	<brianr_> damnit , nbd-client netgotiation error server closed connection
19:02	derp
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20:57	<STV> anyone can help me on installing and configuring LTSP on Ubuntu 15.04 , i cannot find any guide in the internet
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