Ive never used pygrub before.
I did try chrooting but it was complaining about the initramfs command not
being found.
So if the XEN stuff is ok, what else do you think it could be?
Thanks
Ian
-----Original Message-----
From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
Sent: 17 May 2010 09:02
To: Ian Tobin
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] pv_ops Dom0 kernel for DomU?
On Mon, May 17, 2010 at 08:54:35AM +0100, Ian Tobin wrote:
> Hi,
>
> How do you gernerate it from DomU when it wont boot?
>
Well.. mount + chroot + mkinitrd from dom0 might work.
I prefer installing domUs using the distro installer so things
like this get handled automatically.
And I prefer using Xen pygrub so I don't have to have the kernel+initrd in dom0
at all!
> Here is the domU config
>
> CONFIG_XEN=y
> CONFIG_XEN_MAX_DOMAIN_MEMORY=32
> CONFIG_XEN_SAVE_RESTORE=y
> CONFIG_XEN_DEBUG_FS=y
> CONFIG_XEN_BLKDEV_FRONTEND=y
>
So the xen-blkfront is compiled in, you don't necessarily need an initrd then.
> CONFIG_NETXEN_NIC=m
> CONFIG_XEN_NETDEV_FRONTEND=y
> CONFIG_XEN_KBDDEV_FRONTEND=y
> CONFIG_HVC_XEN=y
> CONFIG_XEN_FBDEV_FRONTEND=y
> CONFIG_XEN_BALLOON=y
> CONFIG_XEN_SCRUB_PAGES=y
> CONFIG_XEN_DEV_EVTCHN=y
> CONFIG_XENFS=y
> CONFIG_XEN_COMPAT_XENFS=y
> CONFIG_XEN_SYS_HYPERVISOR=y
>
-- Pasi
> Thanks
>
> Ian
>
>
>
> -----Original Message-----
> From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
> Sent: 17 May 2010 08:51
> To: Ian Tobin
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] pv_ops Dom0 kernel for DomU?
>
> On Mon, May 17, 2010 at 08:40:34AM +0100, Ian Tobin wrote:
> > Hey Pasi,
> >
> > Ive downloaded 2.6.33.4 from kernel.org. The XEN stuff is compiled as
> > static and so is raid,i have created a initrd image by issueing the
> > following (Debian OS)
> >
> > Mkinitramfs -o /boot/initrd.img-2.6.33.4 2.6.33.4
> >
>
> Did you generate the initrd in dom0? You should generate it in domU..
> then you won't have all the dom0-specific md-raid stuff etc there.
>
> > When booting i get the same error
> >
> >
> > Loading, please wait...
> > Begin: Loading essential drivers ... done.
> > Begin: Running /scripts/init-premount ... FATAL: Error inserting fan
> > (/lib/modules/2.6.33.4/kernel/drivers/acpi/fan.ko): No such device
> > FATAL: Error inserting thermal
> > (/lib/modules/2.6.33.4/kernel/drivers/acpi/thermal.ko): No such device
> > done.
> > Begin: Mounting root file system ... Begin: Running /scripts/local-top ...
> > Begin: LoadingFailure: failed to load module raid1.
> > done.
> > Begin: Assembling all MD arrays ... [ 1.991528] md: md0 stopped.
> > mdadm: no devices found for /dev/md0
> > [ 2.004392] md: md1 stopped.
> > mdadm: no devices found for /dev/md1
> > [ 2.021788] md: md2 stopped.
> > mdadm: no devices found for /dev/md2
> > [ 2.047173] md: md3 stopped.
> > mdadm: no devices found for /dev/md3
> > Failure: failed to assemble all arrays.
> > done.
> > Begin: Waiting for udev to process events ... done.
> > done.
> > Begin: Waiting for root file system ...
> >
> >
> > Im not sure if i have missed something out, any ideas?
> >
>
> Please paste "grep XEN .config" from the domU kernel.
>
> -- Pasi
>
>
>
> > Cheers
> >
> > Ian
> >
> >
> > -----Original Message-----
> > From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
> > Sent: 14 May 2010 21:18
> > To: Ian Tobin
> > Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-users] pv_ops Dom0 kernel for DomU?
> >
> > On Fri, May 14, 2010 at 09:05:02PM +0100, Ian Tobin wrote:
> > > Oh right, thats new to me. Ive never had to do that before, is that new
> > > to the pv_ops?
> > >
> >
> > It's not really pvops specific.. it's more about the fact that nowadays
> > all/most
> > drivers are built as modules - so you need to have an initrd image to load
> > them.
> >
> > If you compiled all the xen* stuff as static/built-in then you wouldn't
> > need an initrd..
> >
> > > Many thanks for the info, you learn something new everyday :)
> > >
> >
> > Np.
> >
> > -- Pasi
> >
> > > Ian
> > >
> > >
> > > -----Original Message-----
> > > From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
> > > Sent: 14 May 2010 20:50
> > > To: Ian Tobin
> > > Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> > > Subject: Re: [Xen-users] pv_ops Dom0 kernel for DomU?
> > >
> > > On Fri, May 14, 2010 at 08:45:03PM +0100, Ian Tobin wrote:
> > > > Ah ok, what would be the procedure to do that?
> > > >
> > > > Thanks
> > > >
> > >
> > > Usually it's best to generate the initrd image in the guest,
> > > and use the distro provided domU kernel.
> > >
> > > If you install the guest using the guest distro installer it'll do it for
> > > you automatically.
> > >
> > > You can also do it from dom0.. example for centos/rhel/fedora:
> > >
> > > mkinitrd -v -f --with-module=xenblk --with-module=xennet
> > > /boot/initrd-domU-version.img <kernelversion>
> > >
> > > -- Pasi
> > >
> > > > Ian
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
> > > > Sent: 14 May 2010 20:32
> > > > To: Ian Tobin
> > > > Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> > > > Subject: Re: [Xen-users] pv_ops Dom0 kernel for DomU?
> > > >
> > > > On Fri, May 14, 2010 at 08:27:50PM +0100, Ian Tobin wrote:
> > > > > Ok strange. I have set the DomU config to use the kernel i use for
> > > > > Dom0 and when booting it gets so far to mount the root filesystem and
> > > > > then complains that it cant load the raid1 module which then says it
> > > > > can't load md0, md1, md2 and md3 which are my Dom0 software raid
> > > > > disks.
> > > > >
> > > > > When i use the 2.6.8.18 kernel the domU boots fine.
> > > > >
> > > > > I have in the config to use the initrd.img-2.6.32.12 ram disk but it
> > > > > doesn't work, am i missing something obvious?
> > > > >
> > > >
> > > > Are you using the dom0 initrd for domU?
> > > > If you are, you shouldn't.
> > > >
> > > > domU needs to have its own initrd that loads drivers for the virtual
> > > > hardware the Xen guest has..
> > > >
> > > > -- Pasi
> > > >
> > > > > Thanks
> > > > >
> > > > > Ian
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: Pasi Kärkkäinen [mailto:pasik@xxxxxx]
> > > > > Sent: 14 May 2010 19:48
> > > > > To: Ian Tobin
> > > > > Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> > > > > Subject: Re: [Xen-users] pv_ops Dom0 kernel for DomU?
> > > > >
> > > > > On Fri, May 14, 2010 at 03:08:57PM +0100, Ian Tobin wrote:
> > > > > > Hi,
> > > > > >
> > > > > >
> > > > > >
> > > > > > Just wondered if we can use the pv_ops kernel in Jermeys tree
> > > > > > for linux PV
> > > > > > domU or do we need to get that one from kernel.org ?
> > > > > >
> > > > >
> > > > > Both will work.
> > > > >
> > > > > upstream kernel.org kernels do have basic Xen PV domU support
> > > > > out-of-the-box.
> > > > > Jeremy's tree has some additional features, like pcifront/pciback etc,
> > > > > that are not yet upstream.
> > > > >
> > > > > -- Pasi
> > > > >
> > > > > >
> > > > > >
> > > > > > Thanks
> > > > > >
> > > > > >
> > > > > >
> > > > > > Ian
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > > > _______________________________________________
> > > > > > Xen-users mailing list
> > > > > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > > > > http://lists.xensource.com/xen-users
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
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