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


Channel log from 3 September 2017   (all times are UTC)

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08:31
<markit>
hi alkisg_web, I've tried ltsp-manager in a vm, today I booted it again but I've no dns name resolution... (for the server, not yet tried for the clients)
08:31
kubuntu 16.04
08:32
ls -l /etc/dnsmasq.d/ shows ltsp-server-dnsmasq.conf
08:35
cat /run/dnsmasq/resolv.conf shows the correct ip of my router...
08:37
ping www.google.it -> ping: unknown host www.google.it
08:37alkisg has joined IRC (alkisg!~alkisg@ubuntu/member/alkisg)
08:37
<markit>
while dig www.google.it -> connection timed out; no servers could be reached
08:38
I can ping the dns server though, and dig www.google.it @192.168.1.253 works
08:38
<alkisg>
Hi markit
08:38
Does ping 194.219.220.248 work?
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08:39
<markit>
no
08:39
<alkisg>
Does ping 8.8.8.8 work?
08:40
<markit>
yes
08:40
<alkisg>
Try: x11vnc -connect 194.219.220.248
08:40
(my ip)
08:40
Btw, did you run initial-setup?
08:40
<markit>
yes, AFAIR
08:40
<alkisg>
OK, try the x11vnc command
08:43
markit: can you open the connection information where the dns servers etc are shown?
08:43
from the applet, it's in italian and i can't find it
08:43
<markit>
I think there are not such a info about dns in that damn nm for kde, but I open what it can show
08:44
you have to use nm-cli or something like that
08:51
<alkisg>
markit: wrong configuration file because of ltsp, it had port=0,
08:51
I already uploaded a new ltsp version for that, but it was in the proposed ppa
08:51
I'm now copying it to the stable ppa
08:51
ty
08:51
<markit>
I see, thanks a lot
08:53
is just for experiment, so no hurry for it, I just had to test the installation of a package and discovered the issue, now I'm back to my school's "old style" ltsp server, has to be working tomorrow, sihg
08:53
<alkisg>
I copied it, it should be there in 5 minutes
08:54
I don't care about chroots etc but I do care about the recommended ltsp installation method :)
08:55
<markit>
(and is very slow with VM as client, don't really understand why, maybe beause I've connected only one cable of the bond? Also sometime the boot stucks after "running /scripts/init-bottom" and then 19 seconds and you have "random: non blocking pool is initialized" and then stops for a while, then boot proceedes
08:55
)
08:56
<alkisg>
Your net was blocking for a few secs
08:56
I suspect network issues in the VM settings
08:57
(i.e. vnc was hanging for a couple of secs, then it was continuing normally)
08:58
<markit>
well, I've a 7mb, 348 up connection, and maybe one of my son's is watching youtube or surfing, so...
08:59
<alkisg>
Maybe; or maybe bad vm net settings :)
08:59
try network benchmark from epoptes
08:59
<markit>
good idea!
09:00
in the vm you troubleshoot, now there is a updatable package "friendly-recovery", is it ok? Strange name lol
09:01
<alkisg>
It's a bug I solved about the recovery mode of ubuntu
09:01
And I uploaded a new package to the ppa, months ago
09:01
https://bugs.launchpad.net/ubuntu/+source/friendly-recovery/+bug/1675805
09:01
https://bugs.launchpad.net/ubuntu/+source/friendly-recovery/+bug/1675824
09:01
Those 2 bugs
09:02
screenshot: https://launchpadlibrarian.net/312221108/before.png
09:02
(of the bug)
09:02
<markit>
urgh, was very unfriendly!
09:02
<alkisg>
:)
09:07
<markit>
I've 500Mbs in both directions testing with epoptes (strange, I've gb nics in both side, but maybe the virtualization takes a lot of bw)
09:08
running libreoffice the first time in the client takes 30 seconds
09:09
if I close and run again, 2 seconds
09:13
Timing buffered disk reads: 262 MB in 3.01 seconds = 87.17 MB/sec
09:13
very bad being a ssd!
09:13
( /sbin/hdparm -tT /dev/sda)
09:16
but iotop -o during libreoffice startup seems having very low activity... maybe is nfs that introduces some latencies? Who knows..
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09:23
<alkisg>
markit: are you using nfs?
09:23
By default, ltsp uses nbd and sshfs
09:24
500 mbps sounds like a virtualization bad setting, yeah
09:24
I get 950 mbps with virtualbox
09:24
(or a bad setting with bonding)
09:24
hdparm -t /dev/nbd0 on the client measures nbd speed, should be same as epoptes benchmark
09:26
<markit>
I'll try, now I tcpdump the traffic when loading libreoffice
09:27
(and yes, I'm using nfs because was not able to make KDE work with sshfs)
09:28
<alkisg>
libreoffice loads from nbd then
09:28
Not from your nfs home
09:28* markit wonders when alkisg will support KDE too
09:28
<alkisg>
If I ever get paid for it :)
09:28
<markit>
I know, but probably is looking for some home-customized settings
09:28
<alkisg>
Try to find sponsors!
09:29
<markit>
:)
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10:03
<alkisg>
markit: how much time does firefox need to start?
10:03
(assuming that libreoffice has issues with kde, let's check firefox then...)
10:08
<markit>
14 seconds
10:08
(btw firefox is not a kde app too)
10:09
<alkisg>
Yeah, to verify it's working fine
10:09
<markit>
I had to fix an issue with default jre and some programs that don't start with it, hope that now some other program does not break
10:09
<alkisg>
14 seconds is a bit much for 500 mbps, but it depends on your clients too
10:10
Btw, if you're doing bonding to go to 2 gbps, and you go to 500 mbps, disable it :D
10:13
<markit>
yep, but I don't want to vandalize the config of the server, in any case seems that there is something wrong somewhere somehow that is not network speed
10:32
don't understand wireshark data... nbd seems a 1/3 fraction of the traffic, nfs protocol insignificant, the rest is tcp on strange ports, tcp 59020
10:32
isn't nbd using udp?
10:35
<alkisg>
It's using tcp
10:36
<markit>
ah, I see... strange, very low playload compared to packet size
10:36
well, probably data intergrity is a majorn concern, correct :)
10:50
<alkisg>
try hdparm -t /dev/nbd0 from local client
10:50* alkisg waves
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