Re: [Sisuite-users] Interactive SystemImager installs with CD

Thu, 05 Jan 2006 11:02:26 -0800


On Jan 5, 2006, at 12:04 PM, Bernard Li wrote:

Hi John:
 
In my dhcpd.conf, I have "deny unknown-clients;" and I have an entry for each of my node like this:
 
subnet 192.168.0.0 netmask 255.255.255.0 {
        group {
                host g0002{
                        hardware ethernet 00:90:4F:01:59:00;
                        fixed-address 192.168.0.218;
                        filename "pxelinux.0";
                        option routers 192.168.0.1;
                        option domain-name "yourdomain.com";
                }
 
So far it seems to have worked with 2 DHCP servers running on the same network - of course, each DHCP server is only responsible for a subset of nodes.  However I guess this may not work for Allen since he has no control over the corporate DHCP server - he needs to ensure that it does not give IPs dynamically, which may not be possible to do.
 
Cheers,
 
Bernard

yeah, that's what I did, but the real dhcp server was on the same subnet...and the windows boxes kept saying "request denied" when trying to get a lease.  because my dhcp server was telling them no, and that was the end of it...if you have two similarly configured dhcp severs, maybe it works better.

From: [EMAIL PROTECTED] on behalf of John Jolet
Sent: Thu 05/01/2006 09:52
To: [email protected]
Subject: Re: [Sisuite-users] Interactive SystemImager installs with CD

no, to prevent giving out ips that you don't really own on a private network you have to only allow certain mac addresses to get ips.  unfortunatly, when you do that, the dhcp client is not bright enough to try again and maybe get another server...so you end up denying the dhcp request and they get no ip.

or you can give out for another network, essentially running two subnets over the same wire, and then the poor clients can't route.  Trust me...I did this.  :)

On Jan 5, 2006, at 11:47 AM, Bernard Li wrote:

Correct me if I'm wrong, but I think as long as the DHCP servers aren't both handing out IPs dynamically and they don't have the same IP reservations, it should be fine having more than one DHCP servers in one network.  Of course it could just be that I haven't had any issues...  yet. :-)
 
Cheers,
 
Bernard

From: [EMAIL PROTECTED] on behalf of Allen Bierbaum
Sent: Thu 05/01/2006 07:26
To: [email protected]
Subject: Re: [Sisuite-users] Interactive SystemImager installs with CD

Bernard Li wrote:

> Hi Allen:
> 
> You mention that you cannot use a custom DHCP - can you use the
> _existing_ one then for this purpose?

That would make things easier, but unfortunately I can't modify the
existing network in any way.  The clusters I am using are normally
inside corporate networking environments where I can not modify the
existing DHCP system in any way.  It would be possible to get standard
network settings from it (IP, domain, gateway, etc), but I can not
extend it to return custom information like the image server information.

To make thinks even more difficult, I can't create a "local" DHCP server
because it would be on the same network as "normal" server.  Also I am
not in a setup where I am able to create a private subnet for the
cluster and hide them behind a dual-homed control node or anything like
that.

Is this type of setup that abnormal for using SystemImager?

-Allen

> 
> If you go with the "static DHCP" route, you should just need a DHCP
> server for initial deployment, as the IP address should then be
> hardcoded on the node's network files so subsequently the nodes will
> boot fine without a DHCP server.  Perhaps this is one route you can take?
> 
> Cheers,
> 
> Bernard
>
> ------------------------------------------------------------------------
> *From:* [EMAIL PROTECTED] on behalf of Allen
> Bierbaum
> *Sent:* Wed 04/01/2006 16:21
> *To:* [email protected]
> *Cc:* [EMAIL PROTECTED]
> *Subject:* [Sisuite-users] Interactive SystemImager installs with CD
>
> I recently started investigating the use of SystemImager to standardize
> the installation and maintenance method for a number of clusters I use.
> So far it looks very close to what I want but I have run into an issue
> where I am not going to be able to use a custom DHCP server with my
> clusters.  Instead I would like to use a boot CD to start the installs
> and then interactively provide the hostname and other minimal
> information during the installation process.  I can do this manually by
> using a local.cfg file but this seems like something that could be made
> a little less painful.  Looking through the list archive I found the
> following postings:
>
> HP CD: http://marc.theaimsgroup.com/?m=109467156214191
> Jan Ekholm: http://marc.theaimsgroup.com/?m=109508123028725
>
> Jan's method sounds like what I want (or at least a start), but the
> details of this method were never posted.  Can anyone provide more
> extensive details as to how I would accomplish this?  I am more then
> willing to test it out and post the complete results and associated
> instructions/files on the wiki for people to use in the future.
>
> Thanks,
> Allen
>
>
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