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


Channel log from 18 July 2018   (all times are UTC)

05:04alkisg has joined IRC (alkisg!~alkisg@ubuntu/member/alkisg)
05:05
<alkisg>
20:34<alkisg> You could give it a try with ubuntu if you want, maybe some more recent kernel will make a difference
05:05
21:47<Leolo_2> fyi, kernel-ml is the mainline kernel packaged for CentOS (currently 4.17.6) and kernel-lt is the long term kernel (currently 4.4.140)
05:05
Hehe :D Yeah, trying to start a new pc with kernel 2.6 was too farfetched
05:06
22:03<derick_> How can I use guestlogin and autologin feature together? ==> That doesn't make much sense, if you autologin, where would you see the "login as guest" button?
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05:20
<quinox>
perhaps he wants a fresh profile every time the machine boots
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05:39
<alkisg>
LDM_GUESTLOGIN isn't a guest account, it's just a [Login as guest] button which uses a regular account that already exists on the server and doesn't have any clean up logic
05:39
It's a bit misleading; the "guest" there just means "login without knowning a username/password"
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09:36
<sacarde>
hi
09:38
how can I vie if ltsp is running?
09:49
<Hyperbyte>
sacarde, please describe your problem.
09:50
<sacarde>
I installed ltsp on ubuntu18.04
09:51
installation seems to be good
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09:51
<sacarde>
in netstat -anp I view:
09:51
tcp 0 0 0.0.0.0:10809 0.0.0.0:* LISTEN 19662/nbd-server
09:51
this is ltsp ?
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12:13
<sacarde>
how execute qemu to run as thinclient in a lan that have a ltsp server ?
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12:14
<alkisg>
!kvm
12:14
<ltsp>
kvm: Virtual thin client: kvm -m 256 -vga vmware -ctrl-grab -no-shutdown -net nic,model=virtio -net user,tftp=/var/lib/tftpboot,bootfile=/ltsp/i386/pxelinux.0
12:14
<alkisg>
With virtualbox is also easy to set "bridged adapter" and just netboot it
12:15
sacarde: I'm sure it's possible to make a bridged adapter with kvm too, but I don't have a link handy
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17:27
<Leolo_2>
how does "guest" differ from "autologin" then?
17:35
<quinox>
autologin -> you boot the client and it drops right into the desktop of the user you configured
17:36
guest -> there's a button on the login screen you can click to login with the user you configured
17:36
one is done on boot for you, the other is offered to the user at login as a choice
17:37
(if I understood alkisg correctly - I'm only familiar with the autologin which I use myself for 1 computer)
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17:54
<vagrantc>
quinox: you've got it correctly
17:55
notably LDM's guest login feature predates the one used in regular Ubuntu installations
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18:36
<sacarde>
alkisg, I try: qemu-system-x86_64 -enable-kvm -m 900 -vga vmware -ctrl-grab -net user,tftp=/var/lib/tftpboot,bootfile=/ltsp/amd64/pxelinux.0 -net nic,vlan=0 -net tap,vlan=0,ifname=tap1
18:37
my server ltsp is vm (ip 192.168.1.3)
18:38
but I have error: nothing to boot
18:43
<alkisg>
sacarde: try also asking in #qemu or #kvm, what's their channel
18:43
I know this works, I haven't tested anything else
18:43
!kvm
18:43
<ltsp>
kvm: Virtual thin client: kvm -m 256 -vga vmware -ctrl-grab -no-shutdown -net nic,model=virtio -net user,tftp=/var/lib/tftpboot,bootfile=/ltsp/i386/pxelinux.0
18:44
<alkisg>
I also know it's extremely easy to do that with vbox
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19:05
<talmid>
I changed the IP of the server and now on the clients I cannot login, do I have to update something?
19:05
or just change it back?
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19:27
<alkisg>
talmid: if you're using an ancient ltsp, you might need ltsp-update-sshkeys. Which distro/version are you using?
19:28
<talmid>
I use ltsp-manager, I moved the squash image to a different server
19:28
<alkisg>
talmid: that's not "changing ip" :)
19:28
Now you have different ssh keys
19:29
What is the use case, are you going to be doing that frequently?
19:29
<talmid>
no, just this time
19:29
<alkisg>
How do you plan to update the image in the future?
19:29
<talmid>
moved the ltsp from physical machine to vm
19:29
no, it's not going to change
19:30
<alkisg>
So when there are security updates, you'll just ignore them?
19:30
If you moved all the disk, you also moved the ssh keys
19:30
Did you move all the installation, or just /opt/ltsp/images/amd64.img?
19:30
<talmid>
just the amd64.img
19:31
<alkisg>
Why don't you move the rest as well?
19:31
Or why don't you just run ltsp-update-image inside the vm?
19:32
Anyway, if you really want to do it the way you do it now, you could uncompress the image, put the correct keys, and recompress it,
19:32
or, you could use an lts.conf option to ignore the ssh keys,which is a security issue,
19:32
or, you could move the ssh keys from the physical server to the vm server
19:33
<talmid>
thank you! I will try it now
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21:46
<Leolo_2>
so, CentOS 6 with kernel-ml (4.17.6), when I get to 04-server, the NFS root is not in /proc/mounts
21:47
so it can't find the server to get lts.conf from and defaults to 192.168.67.1
21:50
03-kernel-cmdline looks for nfsroot, but I have root=nfs:
21:51
short solution : ltsp.server=10.30.0.3
21:52
one strange thing is that mount shows the values for the server, not the thin client
21:53
but that'ts because it uses /etc/mtab, not /proc/mount
21:54
mount -n is what I want
21:57
not that still reads mtab, it just prevents writing to it
21:59
<vagrantc>
sounds like CentOS needs someone to fix a lot of things
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22:04
<Leolo_2>
yep
22:04
that someone is me
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22:04
<Leolo_2>
I've submited patches
22:05
<vagrantc>
that's far better than most!
22:05
<Leolo_2>
my problem is that I used LTSP in a very different way then most
22:05
as in, I generate my own dhcp.conf and pxelinux.cfg etc
22:06
if I was setting up LTSP for many people, I'd be more proactive about getting my patches into the mainline
22:06
but I have it installed on 3 servers. those servers work. I only touch them when someone buys a new thin client and it doesn't work
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22:07
<Leolo_2>
one question : when the tftp command to fetch lts.conf fails, why isn't a big huge message displayed somewhere?
22:08
as it is, it just silently fails and limps on without it
22:13
<quinox>
because LTSP has sensible defaults so it can live without lts.cof?
22:17
<Leolo_2>
"won't work unless your server is at 192.168.67.1" is a strange value of "sensible"
22:17
<quinox>
my server lives at 10.50.0.8 and my lts.conf only contains cosmetical settings
22:18
I manually set up my DHCP lines, I think I recall I mention the server IP in that file
22:18
<Leolo_2>
option next-server. that works for the tftp but it's not getting to init-ltsp for some reason
22:19
<quinox>
dhcp-boot=/ltsp/amd64/pxelinux.0,duivenkracht,10.50.0.8
22:19
I suppose that one tells my clients where to find the server
22:20
<Leolo_2>
are you using ISC dhcpd?
22:20
<quinox>
(it's dnsmasq btw)
22:20
<Leolo_2>
aha
22:20
maybe what I want is a "fatal" mode where if anything goes wrong, LTSP fails with verbose debug messages
22:21
and that would be off by default
22:21
<quinox>
I don't know how many errors it currently ignores, but that might indeed be nice for debugging
22:22
<Leolo_2>
I'm also wonder how one could have a nice remote logging facility
22:22
<quinox>
like rsyslog?
22:23
<Leolo_2>
yeah, only it would work even if we don't have the IP of the syslog server
22:23
some kind of broadcast logging
22:23
<quinox>
ah
22:24
<Leolo_2>
I wonder if nc can do UDP broadcast
22:24
and yes, I realise this is border line crazy
22:25
<quinox>
that's why we run Linux right :-)
22:25
<Leolo_2>
mind you, if I'm adding ltsp-logging to the command line, I could just as easily add ltsp-logging=123.123.123.123
22:25
quinox : heh
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22:32
<quinox>
I suppose the simplest way would be to log to 'server'
22:32
<Leolo_2>
that assumes a valid /etc/hosts
22:32
<quinox>
have you had bad /etc/hosts files?
22:32
<Leolo_2>
all the time?
22:33
<quinox>
ok
22:33
<Leolo_2>
I mean server is never in /etc/hosts
22:33
which I guess could be a problem
22:41
[ 66.868] (EE) Screen(s) found, but none have a usable configuration.
22:41
grrrrrrr !
22:41
[ 66.868] (WW) intel(0): Unknown chipset
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22:43
<Leolo_2>
00:02.0 VGA compatible controller: Intel Corporation Device 5a85 (rev 0b) (prog-if 00 [VGA controller])
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22:59
<derick_>
alkisg : Okay. Thanks alkisg
23:00
Also are there any ltsp updates for debian buster. When I am trying to install ltsp in buster. I am able to boot from client but I get this `kernel panic not syncing `
23:01
maybe it is an issue with vagrantbox. I will create my own and let you know if I face any problem.
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