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On 10/30/2015 at 01:28 PM, PGNet Dev wrote: On 10/30/2015 12:14 PM, Charles Arnold wrote:

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On 10/30/2015 at 12:54 PM, PGNet Dev wrote: I'd recently attempted to boot an Opensuse DomU, on Opensuse Dom0, switching to pvgrub2 rather than pygrub as the bootloader mechanism.

You may want to use what the installer tools use (virt-install and vm-install) and that is grub.xen to boot your domU from the grub2-x86_64-xen RPM. Be sure to pull the latest channel updates. pygrub cannot read a btrfs file system to get boot information for starting the VM.

The syntax for a configuration file is, kernel="/usr/lib/grub2/x86_64-xen/grub.xen"

I'm not looking to add complexity to the boot stack -- for either Dom0 or the DomUs.

I don't want to install/use virt-install or vm-install.

I'd like to keep it bog simple. No auto-magic, no installer layers, etc

Simply use already provided Xen-native xl to boot a txt-based, clear & easy to read GUEST.cfg, specifying the pvgrub2 'kernel=' line.

I think that is what I was meant to say. A config file using grub.xen on the kernel line can be started with xl create -f <config file>. You don't need to actually run the installer tools or have libvirt in the picture.

As mentioned in my referenced post, my

kernel = /home/tmp/pvgrub2/grub-x86_64-xen

failed, where that file's generated with

grub2-mkstandalone \ -o grub-x86_64-xen \ -O x86_64-xen \ boot/grub2/grub-xen-pvgrub2.cfg

Can you detail how

/usr/lib/grub2/x86_64-xen/grub.xen

is generated?

grub.xen is part of the official grub2 package. You can download the source RPM and see how it is built.

Also, you re-mention pygrub ("pygrub cannot read ...").

I'm specifically looking to ensure that pygrub is EXCLUDED from the process, and that only PVGRUB2 is used.

Understood. I only mentioned it as some don't realize it doesn't work at all if the boot partition in the VM is btrfs. - Charles -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

Here is a generic (but working) example of a config file. What I am not using in this example is the 'root' option. name="os13.2pv" description="None" uuid="09e84b64-5b3d-bb48-7fe3-488e7058878d" memory=1024 maxmem=1024 vcpus=2 on_poweroff="destroy" on_reboot="restart" on_crash="destroy" localtime=0 keymap="en-us" builder="linux" kernel="/usr/lib/grub2/x86_64-xen/grub.xen" disk=[ '/dev/dm-0,raw,xvda,w,backendtype=phy', ] vif=[ 'mac=00:16:3e:0d:cb:82,bridge=br0', ] vfb=['type=vnc,vncunused=1'] - Charles

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On 10/30/2015 at 02:07 PM, PGNet Dev wrote: On 10/30/2015 12:49 PM, Charles Arnold wrote: I think that is what I was meant to say. A config file using grub.xen on the kernel line can be started with xl create -f <config file>. You don't need to actually run the installer tools or have libvirt in the picture.

Something's still amiss

Given

cat test.cfg name = 'test' builder = 'linux' kernel = '/usr/lib/grub2/x86_64-xen/grub.xen' disk = [ 'phy:/dev/VG0/testBOOT,xvda,w', 'phy:/dev/VG0/testROOT,xvdc,w', ] root = '(xen/xvdc,msdos1)' ...

exec of

xl create -c test.cfg

still drops me to a grub prompt, instead of booting the guest,

grub> ls (proc) (memdisk) (xen/xvda) (xen/xvda,msdos1) (xen/xvdb) (xen/xvdb,msdos1) (xen /xvdc) (xen/xvdc,msdos1) grub>

Using ANY of those^^ in the root= line does the same -- grub prompt.

This is with

vgchange -an kpartx -av /dev/VG0/testBOOT mount /dev/mapper/VG0-testBOOT1 /mnt/TEMP tree -L 1 /mnt/TEMP/grub2 /mnt/TEMP/grub2 ├── backgrounds ├── custom.cfg ├── device.map ├── device.map.old ├── fonts ├── grub.cfg ├── grubenv ├── i386-pc ├── locale └── themes

What's missing?

-- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

On 10/30/2015 02:55 PM, PGNet Dev wrote:

On 10/30/2015 01:38 PM, Charles Arnold wrote:

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Here is a generic (but working) example of a config file. What I am not using in this example is the 'root' option.

name="os13.2pv" description="None" uuid="09e84b64-5b3d-bb48-7fe3-488e7058878d" memory=1024 maxmem=1024 vcpus=2 on_poweroff="destroy" on_reboot="restart" on_crash="destroy" localtime=0 keymap="en-us" builder="linux" kernel="/usr/lib/grub2/x86_64-xen/grub.xen" disk=[ '/dev/dm-0,raw,xvda,w,backendtype=phy', ] vif=[ 'mac=00:16:3e:0d:cb:82,bridge=br0', ] vfb=['type=vnc,vncunused=1']

I note your use of format

disk=[ '/dev/dm-0,raw,xvda,w,backendtype=phy', ]

Noting that my usage boots just fine using pygrub,

disk = [ 'phy:/dev/VG0/testBOOT,xvda,w', 'phy:/dev/VG0/testROOT,xvdc,w', ]

is a change to 'your' format *required* here?

I haven't followed this discussion, but the the answer to the general question you ask here is no. The first format is the new xl disk config format, described in $xen-src/docs/misc/xl-disk-configuration.txt and xl.cfg(5). The second format is the old xmdomain.cfg(5) format. But the old format should still be supported. With the exception of embedded python, a Xen community goal was to support existing domain config when moving from xm/xend to xl/libxl.

Also, instead of a root-vol spec'n,

root = '(xen/xvda,msdos1)'

you appear to use a UUID spec,

uuid="09e84b64-5b3d-bb48-7fe3-488e7058878d"

In this context, uuid is simply domain metadata, similar to name, id, description, etc. Regards, Jim -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

On Mon, Nov 02, PGNet Dev wrote:

On 11/02/2015 08:10 AM, Jim Fehlig wrote:

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I haven't followed this discussion, but the the answer to the general question

Yep, got these to work -- but only if I use a DIY/custom pvgrub2 binary. The opensuse-included one fails, currently:

http://lists.opensuse.org/opensuse-virtual/2015-10/msg00014.html

This is supposed to work out of the box. Perhaps the single grub2-x86_64-xen.rpm from Tumbleweed is needed because the required changes were not backported to 13.2. Olaf -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

On Tue, Nov 03, PGNet Dev wrote:

On 11/03/2015 12:45 AM, Olaf Hering wrote:

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This is supposed to work out of the box. Perhaps the single grub2-x86_64-xen.rpm from Tumbleweed is needed because the required changes were not backported to 13.2.

How safe is an application of TW's pkg to an Opensuse 13.2 install in this since, grub2-x86_64-xen.rpm case?

This package is firmware (for the VM), as such it is unrelated to the host. Olaf -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

On 10/30/2015 01:38 PM, Charles Arnold wrote:

Here is a generic (but working) example of a config file.

Here, Opensuse's pvgrub kernel fails to boot a guest, still dropping to a grub prompt. My DIY-kernel works fine. Using Opensuse's provided pvgrub2 kernel, cat /home/xen/test.cfg name = 'msg' builder = 'linux' kernel = '/usr/lib/grub2/x86_64-xen/grub.xen' disk = [ '/dev/VG0/testBOOT,raw,xvda,backendtype=phy,rw', '/dev/VG0/testROOT,raw,xvdc,backendtype=phy,rw',] vif = [ 'mac=00:16:3E:10:10:01, bridge=br0, vifname=vifT',] vfb = [ 'type=vnc, vncdisplay=1001, vnclisten=127.0.0.1' ] extra = 'textmode=1 xencons=xvc0 noirqdebug elevator=noop console=hvc0' localtime = 0 on_shutdown = 'destroy' on_reboot = 'restart' on_crash = 'destroy' maxmem = 1024 memory = 1024 vcpus = 1 cpus = "1-3" cpu_cap = 100 cpu_weight = 256 exec of xl create -c /home/xen/test.cfg fails, and just drops me to a boot prompt, GNU GRUB version 2.02~beta2 Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device or file completions. grub> ls (proc) (memdisk) (xen/xvda) (xen/xvda,msdos1) (xen/xvdb) (xen/xvdb,msdos1) (xen /xvdc) (xen/xvdc,msdos1) grub> Otoh, if I simply change to my own pvgrub2 blob cat /home/xen/test.cfg ... - kernel = '/usr/lib/grub2/x86_64-xen/grub.xen' + kernel = '/home/tmp/pvgrub2/grub-x86_64-xen' ... where cd /home/tmp rm -rf /home/tmp/pvgrub2 mkdir -p /home/tmp/pvgrub2/boot/grub/ cd /home/tmp/pvgrub2 cat << EOF > boot/grub/grub.cfg insmod part_msdos set root=(xen/xvda,msdos1) linux /vmlinuz-xen root=/dev/xvdc1 noresume splash=silent quiet textmode=1 xencons=xvc0 noirqdebug elevator=noop console=hvc0 initrd /initrd-xen configfile /boot/grub/grub.cfg boot EOF ( note the changes from previous path(s) /boot/grub2, to /boot/grub ...) grub2-mkstandalone \ --compress=no \ --locales="" \ --fonts="unicode" \ --themes="" \ -O x86_64-xen \ -o grub-x86_64-xen \ boot/grub/grub.cfg now exec of xl create -c /home/xen/test.cfg boots the guest, Welcome to openSUSE 13.2 "Harlequin" - Kernel 4.2.3-1.gef1562d-xen (xvc0). opensuse-test login: -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org