[K12OSN] nbd-server on Centos 6.4

[Jaap Bril]

It turns out to be a server problem, nbd-server now works, BUT not as 
distributed;
Without changing the image I disabled the *xinetd service* nbd-server 
and started it by hand (*nbd-server 2000 /opt/ltsp/images/i386.img*). 
The client now boots.

Anyone seen similar behaviour?

Jaap

On 08/03/2013 02:34 AM, Joshua Trimm wrote:
> The issue may be related to the kernel module include in the client 
> rpm's (nbd.ko) if its not found in on the client side it won't be able 
> to net boot.  First mount up your image file as a loopback, chroot 
> into it then check to see if nbd.ko exists in your modules directory 
> for your kernel:
>
> # ls /lib/modules/`uname -r`/kernel/drivers/block/nbd.ko
>
> Also make sure you have the nbd rpm installed on the server
>
> Note that nbd-3.3 hasn't been tested yet, nbd-2.9.20 is the current 
> supported version.
>
> From: Jaap Bril <jaap at jbril.net <mailto:jaap at jbril.net>>
> Reply-To: "Support schools." <k12osn at redhat.com 
> <mailto:k12osn at redhat.com>>
> Date: Fri, 02 Aug 2013 19:04:56 +0200
> To: "Support schools." <k12osn at redhat.com <mailto:k12osn at redhat.com>>
> Subject: [K12OSN] nbd-server on Centos 6.4
>
> LS,
>
> I'm having a problem getting ltsp to work with *nbd-server *on *Centos 
> 6.4*.
>
> dhcp (different server) is ok; /pxelinux.0/ as well as /vmlinuz.ltsp/ 
> and /initrd.ltsp/ arrive on the client.
>
> *nbd-server* starts and seems ok (expected *client-ipaddress*, 
> /image-file/ */opt/ltsp/images/i386.img* and /file-size/ mentioned by 
> *xinetd*)
>
> After that things get hectic (I took quiet off) and eventually go wrong;
> The client-screen blanks and nbd-server stops (exit=1).
>
> I think that the image is ok; I ran *ltsp-build-client* yesterday and 
> *ltsp-update-image* today.
>
>
> How can I definitively *check* that the image is ok?
> Can I *pause* the client to get time to read the text?
>
> Any other suggestions?
>
> Jaap
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