[prev in list] [next in list] [prev in thread] [next in thread] 

List:       ltsp-discuss
Subject:    Re: [Ltsp-discuss] ltsp-cluster LDM_SERVER disagrees with actual
From:       Peter Hartmann <ascensiontech () gmail ! com>
Date:       2011-09-30 15:05:43
Message-ID: CACShMCbomEpze9C=nLK4Tdw_D4+ffekj3oQCCQ4xMDeG4gdvDg () mail ! gmail ! com
[Download RAW message or body]

Hi Marc,
Thanks for the reply.

> It's quite
> possible that the server is not the same on 2 requests.

Are you saying that each time the ldm login screen loads the user
might get a different server after logging out and in?    In any
event, it's consistently opposite after different logins with some
thin clients.


>It's quite
> possible that the server is not the same on 2 requests.

If this were a feature, it would make a lot of sense loadbalancing
wise.  However, it's my understanding that without exporting the
correct LDM_SERVER variable on the thin client this breaks local
devices.   I thought that the thin client uses ssh connect to
LDM_SERVER to mount the local media in /media/$USER/.    Am not not
understanding how this works?    And indeed I see the media showing up
mounted on the wrong node.

Thanks much,
Peter


On Tue, Sep 20, 2011 at 3:24 PM, Marc Gariépy <mgariepy@ubuntu.com> wrote:
> hello,
>
> LDM_SERVER is a loadbalancer ip address of all your appserv. It's quite
> possible that the server is not the same on 2 requests.
>
> The server LDM uses to login is refreshed when user login, so if the
> appserv is down by the time the user login it won't try to log into a
> server. I suggest you to use the ltsp-cluster-control log tab and look
> the event action: "User login".
>
> On Tue, 2011-09-20 at 14:53 -0400, Peter Hartmann wrote:
>> hiya,
>> Running ltsp-cluster on Ubuntu 10.04 with one root server and two
>> nodes serving apps.  The problem is sometimes clients that log into
>> LDM server app-srv1 have the environment variable LDM_SERVER set to
>> the other server app-srv2.   For testing purposes,  I have screen_04 =
>> shell, and screen_02 = xterm    (minimal X script).  env returns the'
>> LDM_SERVER variable and from xterm, running ltsp-cluster-info from
>> xterm shows the Application Server value.    When the problem occurs,
>> after login and one opens a command prompt, the hostname at the shell
>> is either app-srv1 or app-srv2 but the info garnered from the other
>> screens is indeed the opposite server.    In other words, It goes both
>> ways: sometimes actual LDM is app-srv1 and LDM_SERVER is set to
>> app-srv02  or  actual LDM is app-srv2 and LDM_SERVER is set to
>> app-srv1.
>>
>>
>> In Cluster Control, the Terminal Logs  show the accurate LDM server
>> the clients are using.   Any ideas on where to start looking?
>>
>> Earlier I fixed a problem with   /etc/ltsp/lbaconfig.xml  that was
>> setting LDM_SERVER to the interface associated with the default
>> gateway but this seems like a different problem.
>>
>> Thanks in advance,
>>
>> Peter Hartmann
>>
>> ------------------------------------------------------------------------------
>> All the data continuously generated in your IT infrastructure contains a
>> definitive record of customers, application performance, security
>> threats, fraudulent activity and more. Splunk takes this data and makes
>> sense of it. Business sense. IT sense. Common sense.
>> http://p.sf.net/sfu/splunk-d2dcopy1
>> _____________________________________________________________________
>> Ltsp-discuss mailing list.   To un-subscribe, or change prefs, goto:
>>       https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>> For additional LTSP help,   try #ltsp channel on irc.freenode.net
>
>
> ------------------------------------------------------------------------------
> All the data continuously generated in your IT infrastructure contains a
> definitive record of customers, application performance, security
> threats, fraudulent activity and more. Splunk takes this data and makes
> sense of it. Business sense. IT sense. Common sense.
> http://p.sf.net/sfu/splunk-d2dcopy1
> _____________________________________________________________________
> Ltsp-discuss mailing list.   To un-subscribe, or change prefs, goto:
>      https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
> For additional LTSP help,   try #ltsp channel on irc.freenode.net
>

------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security
threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2dcopy2
_____________________________________________________________________
Ltsp-discuss mailing list.   To un-subscribe, or change prefs, goto:
      https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
For additional LTSP help,   try #ltsp channel on irc.freenode.net

[prev in list] [next in list] [prev in thread] [next in thread]