[et-mgmt-tools] Restarting xen guest after koan installation

[Joe_Wulf]

I'm new to cobbler, seems interesting to explore this.

As for rebooting a system post-build, I have had success moving the native
"/etc/rc.d/rc.local" out of the way, instantiating my own to accomplish the
tasks I want via `exec`.  I'm "exec"ing a secondary script, so that at the end of
the processing of my other script I put "/etc/rc.d/rc.local" back, and reboot as
the last thing I do.

R,
-Joe Wulf, CISSP, USN(RET)
 Senior IA Engineer
 ProSync Technology Group, LLC
 www.prosync.com

-----Original Message-----
From: et-mgmt-tools-bounces at redhat.com [mailto:et-mgmt-tools-bounces at redhat.com]
On Behalf Of Michael DeHaan
Sent: Friday, April 25, 2008 15:56
To: Fedora/Linux Management Tools
Subject: Re: [et-mgmt-tools] Restarting xen guest after koan installation

Brenton Leanhardt wrote:
> I'm having trouble getting my Xen paravirt guests to reboot after
> kickstarting via koan.  From what I hear on IRC this is possible
> though I was not able to get it working with the kickstart that iranzo
> kindly let me borrow.
>
> Here's my configuration:
> RHEL 5.1 koan-0.8.0-1.el5
> xen-libs-3.0.3-41.el5
> kernel-xen-2.6.18-53.el5
> xen-3.0.3-41.el5
>
> Fedora 8 with Cobbler 0.8.3
>
> After looking at the koan and virtinst code I simply don't see how it
> would be possible for the guest to be rebooted after installation.
> What led me down the path of thinking this is not a problem with my
> kickstart is that fact that at kickstart time 'virsh dumpxml <myDomU>'
> shows that on_reboot is set to "destroy".  This appears to be the
> desired behavior from looking at virtinst.  I tried changing virtinst
> to restart after installation but the OS cmdline causes the guest to
> get rekicked (that's probably why it's set to "destroy").  "restart"
> in virtinst the OS cmdline.
>
> Is there some magical flag to koan I'm missing to make rebooting
> possible?  For my purposes I even looked into using libvirt to change
> the DomU's in memory configuration at kickstart time.  That doesn't
> seem to be possible from looking at the API (probably for good
> reasons).

There is a limitation in the libraries (Xen I think?) that you can't 
reboot a guest automatically after installation.
I've wanted to work around this also.

This is however, something you could script with Func, and possibly 
cobbler post-install triggers.

--Michael


>
> --Brenton
>
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