[CentOS] virt-manager crashes Host during installation of guest

Mon Aug 24 18:31:00 UTC 2009
Bernhard Gschaider <bgschaid_lists at ice-sf.at>

>>>>> On Mon, 24 Aug 2009 20:43:57 +0300
>>>>> "PK" == Pasi Kärkkäinen <pasik at iki.fi> wrote:

    PK> On Mon, Aug 24, 2009 at 06:04:06PM +0200, Bernhard Gschaider
    PK> wrote:
    >> >>>>> On Thu, 20 Aug 2009 01:47:07 +0200
    >> >>>>> "BG" == Bernhard Gschaider <bgschaid_lists at ice-sf.at> wrote:
    >> 
    BG> Thanks to everyone who took the time to answer in this thread.
    >>
    BG> I'm just writing this message to give this thread some closure
    BG> and am not expecting any answers
    >> I found the cause of my problem. I'll answer to my own posting,
    >> because none of the follow-ups lead to the solution, the reason
    >> being that I withheld some vital information for the diagnosis:
    >> 
    >> The filesystem which the disk-image for the virtual machine
    >> resides on is XFS!
    >> 
    >> Googling around I found indications that there are indications
    >> that XEN and XFS are not the best of friends, but nobody hinted
    >> at something as drastic as completely freezing the host.
    >> 
    >> Anyway. When I create the image on an ext3-partition and point
    >> the configuration to it (no other changes) the installation
    >> works without problems.
    >> 

    PK> Are you running 32bit or 64bit Xen host/dom0?

    PK> XFS is known to have problems on 32bit kernels, while it
    PK> should work on 64bit kernels. (this is even without Xen).

Everything is 64 bit. So that can't be the explanation.

    PK> -- Pasi

    >> Bernhard
    >> 
    >> PS: There were speculations in the replies, that this was my
    >> first Xen-experience. I want to stress that I have already a
    >> running Xen-machine, that's why I was surprised that it didn't
    >> work this time (but I set that one up a year ago, so
    >> technically I am starting anew with Xen and the speculations
    >> are right)
    >> 
    >> >>>>> On Wed, 19 Aug 2009 10:29:33 -0700 (PDT)
    >> >>>>> "IM" == Ian Murray <murrayie at yahoo.co.uk> wrote:
    >> 
    >> >>> > This (and other replies) lead me to two possible
    >> culprits: > >>> - either the graphical console over X11 is not
    >> a good idea >>> (but I > can't imagine that, it shouldn't shoot
    >> the kernel) > >>> - I always installed as a paravirtualized
    >> machine, Could it be >>> that > the install-kernel on the
    >> 5.3-media is not aware of >>> this and somehow > manages to
    >> shot the host (because I noticed >>> that most recipies on >
    >> the > net, including >>> http://wiki.centos.org/HowTos/Xen/ >
    >> InstallingCentOSDomU > >>> never talk about paravirtualized (so
    >> I assume they use a fully >>> > virtualized guest)
    >> >>> >
    >> >>> > I will try these later today (when people left the office
    >> >>> and no one > will complain about server downtimes)
    >> >>> >
    >> >>> > Bernhard
    >> >>> >
    >> >>> > BTW: Just one fundamental question: as the upstream OS
    >> >>> vendor is > switching his virtualization to KVM anyway, is
    >> it >>> a good idea to > forget Xen and use KVM (in other words:
    >> is it >>> stable enough for > production)?
    >> 
    BG> I tried removing both suspects by
    >>
    BG> - following the Wiki-Howto to the letter (especially using the
    BG> Xen-install-kernels) - instead of going over the network I
    BG> worked directly at the machine (although I totally agree that
    BG> a VNC-session shouldn't be ble to shoot the machine)
    >>
    BG> but the problem is still there. When I start the configured
    BG> machine that points to an install-kernel with
    >>
    BG> xm create newGuest -c
    >>
    BG> I see the kernel boot up until it comes to the message
    >>
    BG> Write protecting the kernel read-only data
    >>
    BG> where it hangs for some seconds, then the screen goes blank
    BG> and the machine reboots.
    >>
    BG> I'm starting to suspect that it is somehow hardware-related
    BG> (it is a Fujitsu-Siemens Synergy server with a
    BG> RAID-controller) and I will investigate in that direction
    >> 
    >> 
    >> --
    >> ---------------------------------------------------------------------------
    >> DI Bernhard F.W. Gschaider
    >> ---------------------------------------------------------------------------
    >> EMail: Bernhard.Gschaider at ice-sf.at WWW : www.ice-sf.at Jabber
    >> : bgschaid at jabber.org Tel: +43(3842)98282-42 Fax:
    >> +43(3842)98282-02
    >> ---------------------------------------------------------------------------



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-- 
---------------------------------------------------------------------------
DI Bernhard F.W. Gschaider
---------------------------------------------------------------------------
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