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note: I'm pasting this from wiki.netbsd.se since it has already shut down.


I'm trying to install Xen hypervisor on our amd64 box with NetBSD-4.0. I'm getting a couple of errors on getting it to run. The friendly folks at #netbsd told me that I either need to use i386 kernel or use the bleeding edge NetBSD-CURRENT. They suggested that I setup a wiki page to document my progress.

Well, this is this page. I'll update this from time to time.

Switching from 4.0 to CURRENT Edit

My box is currently using NetBSD 4.0:

root@:~# uname -v
NetBSD 4.0 (GENERIC) #0: Sat Dec 15 22:25:31 PST 2007

I need to change my kernel to CURRENT. First, I need to fetch the sources as outlined in http://www.netbsd.org/docs/guide/en/chap-fetch.html:

(more to come... blah, blah, blah...)

Unorganized NotesEdit

This section will be organized later.

Whoa... /usr/src/build.sh is very cool. Rebuilding the kernel is very easy. I just downloaded the sources, and executed ./build.sh tools kernel=RAZOR-XEN3_DOM, and that's it.

grub doesn't compile in amd64 via pkgsrc. 32-bit binary compatibility is required.

IMPORTANT: should be emulators/netbsd32_compat30, not emulators/netbsd32_compat40

just do pkg_add -f

It's a bit hard finding a decent FTP mirror for downloading the packages...

Problem executing grub-install after I did pkg_add:

root@razor:~# grub-install "(hd0)"
/usr/pkg/sbin/grub: 1: Syntax error: "(" unexpected
sed: /grub/device.map: No such file or directory
grep: /grub/device.map: No such file or directory
/dev/wd0a does not have any corresponding BIOS drive.

Reason: Some files are missing. /grub is empty.

It seems that neither emulators/netbsd32_compat30 or emulators/netbsd32_40 work:

root@razor:~# grub
/usr/pkg/sbin/grub: Exec format error. Binary file not executable.

root@razor:~# file `which grub`
/usr/pkg/sbin/grub: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for NetBSD 4.0, dynamically linked (uses shared libs), stripped

Blah. In addition to netbsd32_compat30, I also needed to install netbsd32_compat16 as well. Problem solved. grub now runs. Note that the correct grub package is the one that is built for NetBSD 3.1.

Problem solved, now I have a new problem:

root@razor:~# grub-install /dev/wd0d
The file /grub/stage1 not read correctly.

Blah blah blah. It seems that grub doesn't recognize a root file system greater than 512MB. Mine is around 15GB. Waaaah...

Problem solved. In the grub shell, I just did:

install= (hd0,0,a)/stage1 (hd0,0,a) (hd0,0,a)/stage2 p (hd0,0,a)/menu.lst

Instead of the usual "setup (hd0)".

I can't boot. grub can't seem to read either /netbsd or /xen.gz. I'll just download the bootonly ISO and install CURRENT. I'll also make sure that the size for / is 512MB only.


w00t! I have now a running NetBSD dom0 on our amd64 box. I'll now reorganize this wiki page. To recap:

  • use i386 grub package built for NetBSD 3.1
  • compiling xenkernel3 via current pkgsrc, as of Feb 14, 2008, doesn't work. doing a pkg_add -f on a package that was built for NetBSD 4.0 works just fine though
  • / must be less than or equal to 512MB. My previous setup, which uses 15GB, didn't work. grub seems to have trouble reading large / partitions.
  • use NetBSD-CURRENT instead of NetBSD 4.0
root@razor:~# uname -a
NetBSD razor.simoncpu.com 4.99.54 NetBSD 4.99.54 (XEN3_DOM0) #0: Sun Feb 10 03:24:57 PST 2008  builds@wb28:/home/builds/ab/HEAD/amd64/200802100002Z-obj/home/builds/ab/HEAD/src/sys/arch/amd64/compile/XEN3_DOM0 amd64

domUEdit

rc.conf:

xend=YES
xenbackendd=YES
brctl: not found

needs bridge-utils from pkgsrc-wip