RE: diskless workstations / setup

[Mike Gabriel <mike.gabriel@das-netzwerkteam.de>]

Hi Oded,

On Fr 01 Apr 2011 11:54:23 CEST Oded Naveh wrote:

> Hello Mike
>
> [Mike Gabriel - Friday, April 01, 2011 11:25 AM]
>
> > On Mi 30 Mär 2011 04:52:22 CEST Oded Naveh wrote:
> >
> > > I don't quite understand your questions,
> > > it may be that I'm completely un-informed,
>
> This discussion has already been educating for me. Thanks.
>
> > Tjener is main server, LTSP server is separate...
> > -------------------------------------------------
> > This is the actual question I have: the boot prompt offered to a
> > machine booting via PXE results from dhcpd config. Dhcpd config is
> > stored in LDAP.
> >
> >    o I have a tjener that offers PXE Debian Edu installer...
> >    o and I have an LTSP server that offers Diskless Workstations to
> >      the 10-network
> >    o How can are these different functionalities controlled? (with
> >    GOsa?) o Which PXE boot prompts (install Debian Edu via PXE, Thin
> >      Client, Diskless Workstation) are available in which subnets?
> >
> > Again, I am asking for the current Skolelinux squeeze defaults (that
> > might already have been the defaults in Debian Edu lenny).
>
> I can't say anything about the current setup, sorry. but I still think
> the following is relevant to your questions. I'll try to be concise.
>
> PXE boot can be easily controlled through GOSA by manipulating DHCP  
> configuration.
> The relevant settings [0] are:
> 	- next-server
> 	- root-path
> 	- filename
> These may be defined per subnet or per host - by MAC address - as  
> well as other
> declarations [1]. The more specific takes precedence.
>
> However, for this to work these options must point to locations pre-installed
> with the relevant PXE configurations.
>
> I believe the locations in default Skolinux installations haven't  
> changed and can
> be seen in /var/lib/tftpboot/ on the LTSP server for more details,  
> Where there
> are essentially at least two different locations. The exact location  
> can be determined
> by looking at the DHCP parameters.
>
> To sum up:
> 	query your LDAP for 'root-path' it will tell you where to look farther.
>
> Hope it helps. Odd.
>
> [0] See man dhcp-options(5).
>
> [1] From man dhcpd.conf(5) (where there's a lot more):
>        When  a  client  is to be booted, its boot parameters are  
> determined by
>        consulting that client's host declaration (if any), and then  
> consulting
>        any  class declarations matching the client, followed by the  
> pool, sub-
>        net and shared-network declarations for the IP address  
> assigned to  the
>        client.    Each  of  these declarations itself appears within  
> a lexical
>        scope, and all declarations at less specific lexical  scopes   
> are  also
>        consulted for client option declarations.   Scopes are never  
> considered
>        twice, and if parameters are declared  in  more  than  one   
> scope,  the
>        parameter  declared in the most specific scope is the one  
> that is used.

Thanks for your contribution (again!). Maybe still there is someone  
who know the current defaults...

Greets,
Mike



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