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wanted some help about ltsp-cluster installation with openldap auth
Have installed it following this guide - https://help.ubuntu.com/community/UbuntuLTSP/LTSP-Cluster with the root and the app server as VMs
there is no mention of how to configure openldap clients for the cluster, but guess it should be same as any one of these - https://help.ubuntu.com/community/LDAPClientAuthentication or https://help.ubuntu.com/community/UbuntuLTSP/OpenLDAP_NFS_SSL - which one of these should be used?
any one recently experienced on lucid ?
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guys, how can I add device driver to support my thin clients graphic card. I have the driver but if I chroot into /opt/ltsp/i386 and run modprobe I get error about missing file: /lib/modules/2.6.32-24-generic/modules.dep --- I do have this file in /lib/modules/2.6.32-23-generic/
well, I totally missed this doc: https://sourceforge.net/apps/mediawiki/ltsp/index.php?title=Ltsp_LtspDocumentationUpstream
I'll try it
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found these last pieces - http://nroussi.blogspot.com/2010/05/ltsp-cluster-with-ubuntu-1004-lucid.html , http://email@example.com/msg05684.html , https://lists.ubuntu.com/archives/edubuntu-users/2010-May/006247.html . Any updates shall be most welcome as I am up against THE WALL :)
may be stgraber can throw some light on it.
meanwhile trying to get things working with kiwi-ltsp
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alkisg, you have wrote add-ppa.sh ?
muppis: yes, for limited repositories: http://ts.sch.gr/repo/add-ppa.sh
E.g. wget http://ts.sch.gr/repo/add-ppa.sh -O /tmp/add-ppa.sh
sh /tmp/add-ppa.sh stgraber
==> that adds stgraber's repository. Which repository do you need?
(for karmic+, add-apt-repository is also available)
I think it is ts.sch.gr which fixes TC's shutdown?
muppis: which distro/version? lucid?
I'm adding to installation-documentation so I like to keep it simple.
Then you just need this: sudo add-apt-repository ppa:ts.sch.gr && sudo apt-get update && sudo apt-get dist-upgrade
(add-ppa.sh is for older ubuntu versions which do not have add-apt-repository)
apt-add-repository, actually. ;)
Ok, there's both.
The apt-add-repository is a symlink, the proper name is add-apt-repository
Yes. Thank you, didn't notice that command before.
I planning to use LTSP in my home for HTPC -environment, but then I thought if I had to make local installation for wlan then it is same install whole system locally..
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You mean you want to boot ltsp over wireless?
I got Broadcom -based wireless in all machines..
Does gpxe support those?
So you need a kernel locally?
It seems so.
Those would make it a little simpler
So anyway now you need a local kernel + patched initrd
And Broadcom ain't helping things.
I got suggestion from my wife to get lan in every room (except kitchen and bathrooms, funny..), so things gets easier then. We just bought a house and we're repairing it.
Yeah we did that too
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Does one have to add users to the chroot? What's the most common way of adding accounts so that you can log into your own account through the client?
Users are added on the server, e.g. with adduser or users-admin etc etc
Just like if it was just a normal workstation
What would cause this to NOT work?
(I've tried it.)
Sorry. Lucid Edubuntu. Up-to-date with updated sources.
I tried to add a couple of users without passwords, and when it tried to access them, it said user id unknown.
I don't think ssh will work without a password. Try to add passwords.
Could it be related to a Grub error I'm getting? When I reboot the client, it comes up with a Grub error dealing with an unknown userid just before showing the login prompt.
Okay, I'll try that, thanks.
If I have one account for a group of people (first graders, for example), will there a conflict dealing with shared resources? Is this a common way of doing things?
The younger kids (Kindergarteners and First graders, probably) will have trouble logging in.
redbaritone: use a different account per pc, it won't work with the same account for all
alkisg: "lts.conf" :: http://manpages.ubuntu.com/lts.conf
redbaritone: see the lts.conf man page for a way to enable automatic login for younger children
(either completely automatic, with a button click (without password), or timed login)
LDM_USERNAME, LDM_PASSWORD, LDM_GUESTLOGIN, LDM_AUTOLOGIN etc
Thanks alkisg. That's what I needed.
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Do I remember correctly that installation sets IP for eth1 automatically to 192.168.0.254 ?
Ubuntu Alterante LTSP install?
OK I am rebuilding my Ubuntu LTSP nestwork in conjunction with moving to 10.04 Currently I have everything 75 clients 4 LTSP servers and 1 NFS server all on one network seperated by switches. This way I can put any client on any server. All the LTSP servers have a seperate direct connection to the NFS server. I am considering seperating clients into groups and putting them behind specific LTSP servers to segment and possibly reduce the load on the network. Ca
...and possibly reduce the load on the network. Ca ==> it was cut-off there
... Can anyone comment on either setup? Any help is truely appreciated.
Are specific users always seated to specific workstations?
No, but I will still have the users home folders shared through NFS
How do you manage user accounts? LDAP?
Actuall I cheat. Any changes to user accounts have to be made on one machine then the passwd group and shadow files are automatically copied to the others.
ltsp-cluster would be a "proper" solution for multiple ltsp servers, but ok, cheating is also convenient sometimes. :)
scripts are wonderful things:-D
How do you do load balancing? A script that randomly selects a server on boot?
or from dhcpd.conf ?
No right now any one client is mapped to a specific server via DHCP. I can change the DHCP config if I need to move the client with out moving any cables. If I go to seperating the clients into groups I can do this but I don't know if it matters.
I'd try to prefer the ltsp server which is on the same switch, to avoid backbone traffic (if I understood your topology correctly). Other than that, it sounds good to me...
If I went the ltsp-cluster route I would need to change to a flat network though ... right?
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What about the connection to the NFS server, right now I have a crossover cable from each app server to the NFS server. This is not scaleable past the four Gig NICS I can put in the NFS server. Have you tried NIC bonding vs direct connect?
Are they PCI?
Yeah that would work. I tried with 4x100mbps pci nics, with netperf I got 375mbps, pretty close to a full 4x speed.
*I tried bonding, that is
Hmm... Bonding can be done with regular nic's?
Do you have any experience with NFS? I really think this has always been my problem as far as speed and system "freezes"
I had a problem with lockd not starting, which caused the clients to freeze while logging in
So now I'm using "nolock" on my fat clients to overcome this
But for our low-budgets schools, it's always ltsp server == nfs server, we never use separate servers..
(and the teacher is also working on the server :))
Others here might have more experience.
My users are High school administration and also teachers and serveral labs. The labs do alot of gimp and video editing while most of the rest is OO and firefox. I need to try to eliminate the idea of system slowness for the admin so they like the ltsp idea better. Any pointers on what to start tunning so they see very little 3 to 15 second delays. Right now this happens serveral times a day
Client specs? (cpu/ram)
most of the clients are NTS thin clients 800Mhz / 512mb ram
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My users are High school administration and also teachers and serveral labs. The labs do alot of gimp and video editing while most of the rest is OO and firefox. I need to try to eliminate the idea of system slowness for the admin so they like the ltsp idea better. Any pointers on what to start tunning so they see very little of the 3 to 30 second delays. Right now this happens serveral times a day which is really causing some frustration... :'(
sorry about the double post. That was supposed to be in an email not here.
Check also any dns problems
hi alkisg. do you if one can ssh from the server to the client ?
the "freeze" almost hangs everything. No response to keyboard but the mouse moves but will not click
I need to see lspci | grep VGA, but screen is all distorted on the thin client
dekelev: try SCREEN_02=shell in lts.conf
That will prevent it from starting X, so no distortion should happen...
so it will open on xterm ?
puck1: I had the same symptoms with lockd. Read about nolock, maybe you'll decide that you also don't want nfs locks.
dekelev: no, it will give you an old-style console, no X at all
sorry, that's what I ment. thx
alkisg: thin client now shows an empty black screen after loading
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dekelev: try also replacing "quiet splash" with "nomodeset" in pxelinux.cfg/default
ok, I'll try that, thx
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still opens a distorted login screen
alkisg If I see this correctly the nolock option will disable the file locking on all files. This may work on a users home folder but not on our shared folders. I can seperate the nfs mounts but should this improve the performance to users home folders?
dekelev: can you paste your lts.conf to pastebin?
now, I have only this line: SYSLOG_HOST=server
puck1: in my minimal experience, my clients stopped freezing with that. But that's about all I know about nfs, so I can't give good advice on that.
dekelev: put this:
...and see if you still have the problem
thx I give it a try
But *keep* the nomodeset in pxelinux.cfg/default
alkisg: now it opens a black screen but still distorted. when I run command it seems like it reacting but I can't read anything
maybe it's the screen?
dekelev: when it boots, do you see letters?
(before it finishes booting)
yeh, when pxe boot loads, gets IP and load pxelinux - It show letters
E.g. can you enter the bios?
but after that - all distorted
OK, then it's a graphics card driver problem
(or something like that)
What do you have now in pxelinux.cfg/default ?
append ro initrd=initrd.img nomodeset nbdport=2001
Urm, you have 2 chroots?
Why the 2001 there?
Anyway, can you try with a different client (before resorting to installing ssh on the chroot etc)?
I tried a laptop and it wasn't distorted
I use 2001 port in nbd-server/config & /etc/inetd.conf
Give it a last try before installing ssh: put "break=init" right next to "nomodeset"
If you see a shell there, you can chroot and run lspci
say I find a driver, all I need is to put it inside /opt/ltsp/i386 and call it's exact path from lts.conf (MODULE_01=...), ltsp-update-image and that's it ?
If not, install ssh to the chroot and unlock the root password
I don't think a driver is needed
It should be a KMS regression
So some parameter to disable KMS or a newer kernel or something like that
let me test this break-init
thx a lot
(3:21:52 PM) Intelliant: hi!
(3:22:39 PM) Intelliant: wanted some help about ltsp-cluster installation with openldap auth
(3:26:25 PM) Intelliant: Have installed it following this guide - https://help.ubuntu.com/community/UbuntuLTSP/LTSP-Cluster with the root and the app server as VMs
(3:28:54 PM) Intelliant: there is no mention of how to configure openldap clients for the cluster, but guess it should be same as any one of these - https://help.ubuntu.com/community/LDAPClientAuthentication or https://help.ubuntu.com/community/UbuntuLTSP/OpenLDAP_NFS_SSL - which one of these should be used?
(3:29:09 PM) Intelliant: any one recently experienced on lucid ?ed the room.
(5:15:25 PM) Intelliant: found these last pieces - http://nroussi.blogspot.com/2010/05/ltsp-cluster-with-ubuntu-1004-lucid.html , http://firstname.lastname@example.org/msg05684.html , https://lists.ubuntu.com/archives/edubuntu-users/2010-May/006247.html . Any updates shall be most welcome as I am up against THE WALL :)
aliksg, any thoughts on the above ^^
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whats the problem intelliant ?
is the client auth not working?
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Appiah, yes I am unable to configure the client-auth
what does auth.log say?
I have openldap on a centos server
getent passwd does not return any of the users form the ldap db
slapd on centos
and ldap-client on ubuntu
I have scrapped that installation
am redoing it
can you suggest which is the correct link to follow?
I dont see how this is really a LTSP issue
if your having problems configuring a client to auth to your server
do you got any other working ldapclient?
against the same server
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I have managed to get clients to auth against the server sans ldap
Appiah, I agree it is not purely an ltsp issue, but an ldap-client issue
but if addressed it will make the howto and the ltsp-cluster solution on ubuntu complete
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Appiah, opensuse ldapclient is working fine
It worked like a breeze with default configuration
seems like there may be some issue with configuring ldapclient on ubuntu or in the method employed by me.
so what does your auth.log say?
can you pastebin the nsswitch.conf?
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Appiah, too late for me now today
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will do tomorrow as per progress
thanks for now
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hey guys, on ubuntu 10.04. did some updates today and when i logout i cant log back in without rebooting the whole terminal. anybody else experiencing this?
Did you update chroot also?
nope, actually i did not
that's not enough
did you update to ubuntu 10.04?
or upgrades within 10.04
then you shouldn't have to update your chroot
i didnt think i had to
probably a bug of some sort, you'll have to look at the logs
does it always work after rebooting?
sitting at the login screen says "verifying password" forever
or do you have to reboot each time?
log in, log out, try loggin back in, hangs at verifying password, reboot terminal, login
then you'll hae to look at your logs
any log in particular? i have a bunch of people on this server
you've been around here enough...
guess which log is related to logging in..
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well of course i just tried to replicate it and i couldnt
AFTER i did ltsp-update-image though
so maybe it did do that
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im looking at ltsp. what kind or environment do you run it in? what do you use it for?
a place where you would like terminal clients
well, EDU, corporate, your house
your mom's basement, etc
schools and "kiosk" computers seams to be a pretty common scenario here in #ltsp
but it works for everything..
is it encrypted by default? years ago i believe it was using xdmcp with no encryption
it uses SSH
does the image update enough that you can watch video?
is it better/worse than RDP to a windows machine
It supports both encrypted and unencrypted traffic. It's much better than RDP, given enough bandwidth.
E.g. you can watch full screen video with 50 mbps
yes you can use it to watch videos
how does hulu look?
thats kind of our litmus test
it comes with encryption by default, you'll have to disable it
alkisg, i still can't find a linux based virtual machine builder that does multiple isos :(
johnny: vm builder? or live cd builder?
ultimately, it should allow me to boot from these cds but also contain portable virtualbox and keep that updated
I can see why you didn't find that yet :)
shouldnt' such a toolbox exist?
one does for windows
i don't know if it keeps virtualbox up to date or not
but it does install it
john--__: LTSP uses remote X windows. Remote X windows can show as much fps as your CPU+network can handle. Flash strains both of them, so for a full screen flash video you'd need a good cpu + a gigabit network.
my knowledge is dated, but in the old days i thought you couldnt wrap ssh around xmdcp because it used multiple ports or udp broadcasts (or something else entirely)
what changed in recent times?
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john--__: xdmcp is about logging in - LTSP normally doesn't use it, it uses its own display manager, ldm for that. After logging in, both use remote X.
xdmcp only supports unencrypted X traffic, while LTSP supports both encrypted + unencrypted
|19:37||* vagrantc waves from NYC|
where's gadi when you need em?
You can wrap X traffic in ssh (==> ssh -X)
Hey vagrantc - he was here a while ago
so when people used pure xdmcp to get a remote desktop that was completely insecure
vagrantc: gadi was last seen in #ltsp 1 day, 6 hours, 40 minutes, and 51 seconds ago: <Gadi> dekelev: no - it is exported through inetd (/etc/inetd.conf)
so the apps are run with remotex over ssh, but the desktop is provided via xdmcp?
vagrantc: he logged out 5 hours ago
john--__: no, XDMCP isn't used at all normaly. It's an option if anyone wants it, but normally it isn't used.
The apps and the desktop are the same thing
See the topic for the docs, they explain the mechanism used
so the thin client basically grabs enough of X via tftp that it can display most stuff r emotely?
alright, ill take a loo
No, tftp is only used for the kernel
The disk is mounted with nfs or nbd
reading the docs...
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hey hey friends
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Hello. I just installed ubuntu 10 with ltsp. My problem is that I have a seperate dhcp server and would like to pxe boot using the new ltsp server. Any documentation or advice?
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a google search will help
the ubuntu wiki has lots
johnny: "dhcp" :: http://wiki.ltsp.org/twiki/bin/view/Ltsp/DHCP
johnny: I have. I'm using clearos as my dhcp server.
never heard of it
anyways, standard documentation will help
read that link
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