We were having a problem with our SUS on 10.7 not pulling all the updates so we upgraded it to 10.8 and it fixed the SUS issues but now we are having issues with diskless net booting.
Anyone else found this to be an issue as well?
Instructional Technology Specialist
Princeton Public Schools
What I found after upgrading to 10.8 is none of my 10.7 netboot images would work.I put up a new 10.8 image and it is the only one working. Still looking into this issue but I have seen that. Using it just to start the imaging process. No problems at all with Casper imaging deploying 10.6 and 10.7 images but need the 10.8 to boot from.
When making a 10.8 nbi today (no previous working diskless .nibs) I came across this page from the University of Utah: http://tinyurl.com/bovg5j7
We used the modified rc.netboot file to force clients to use a RAM disk for the shadow file in our NetBoot.dmg files, then we set the netboot images as diskless in Server Admin. After that we tested a MacBook Pro, iMac, and Mac Pro. Each booted diskless to 10.8 from a 10.6.8 NB server without issue.
I suspect the same trick should work for all OS versions based on the info at the link. Not sure why Apple doesn't use a RAM disk by default...
You can get to it through one of the menus in Server.app too. The admin tools have been replaced in 10.8 by Server.app or command line tools. Only System Image Utility and Workgroup Manager remain. I miss the admin tools, Server.app in 10.8 isn't horrible but doesn't offer all the same powers the tools did. Maybe in 10.9....
I setup a brand new Mountain Lion Server created a brand new Mountain Lion NBI with Casper 8.6. Made sure Diskless was selected in Server.app It works perfectly. Perhaps something with your NBI or something during the upgrade? But I can verify it all works with no extra hacks, from a clean install anyways.
I've had two JumpStarts now where Diskless is not working. The last one we were luck to get resolved because I did the following:
1) uncheck diskless; save
2) stop NetBoot Service
3) check diskless; save
4) start NetBoot Service
It seems like the action of writing some of these config files may not go all the way through on initial configuration.
I would not bother with the mod as diskless boot does work. It does need a little fine tuning but it does work. Normaly its some sort of permission issue or file share issue. Doing what Justin did above or deleting the netbootusers folder and letting server.app recreate it usually does the trick.
Manually enable File Sharing for all "netboot" hidden system accounts. Better than having to create a RAM disk...thankfully we managed to avoid that. Previously, 10.7 client and server diskless worked, but 10.8 server and clients (we upgraded both) did not...same server and clients. After that change all was well again. Crazy.
I am currently running a 10.8.5 netboot server with a 10.8.5 netboot image. I didn't follow the instructions provided by JAMF to create it. Install OS X on a clean partition, run software update, mount drive on server running 10.8.5, launch System Image Utility from /System/Library/CoreServices/ and create a NetBoot Image. When you drop your NetBoot image into your 10.8.5 Server, simply double-click the image in the NetBoot pane, check the box for Diskless booting, and make sure your Image Index isn't being used by another .nbi file on your network. Works like a charm.