Re: [Xen-devel] Re: Virtualization Test Day for F16 and Xen
On Wed, Sep 21, 2011 at 06:59:57PM -0400, Konrad Rzeszutek Wilk wrote: On Wed, Sep 21, 2011 at 03:46:31PM -0700, Jeremy Fitzhardinge wrote: On 09/21/2011 01:03 PM, Konrad Rzeszutek Wilk wrote: So, there's a meta-point here: we currently 'require' Beta releases to boot as guests on Xen hosts: The release must boot successfully as a virtual guest in a situation where the virtual host is running a supported Xen implementation I really don't have much knowledge of Xen and haven't followed this discussion closely, but do any currently-known bugs prevent this? If so, please flag them up so they can be considered as Beta blockers...thanks! I filled Bug 740378 - F16: Can't use keyboard when installing F16-Alpha under Xen (regression) as guest which is pretty descripting what is below. Also adding in Jeremy's workaround in it. Though I couldn't repro the general problems I was having - I later did a clean F14 install with no problems. So I don't really know what's going on here; I might try another F16 hvm install to see how it goes. But there is a bona-fide bug that F16 doesn't include xen-platform-pci by default in its initramfs, so it ends up unplugging its emulated devices without discovering the PV ones to replace them... Can you open a BZ at bugzilla.redhat.com please? Also should we change the default xen-platform-pci to =y in upstream Linux .config to avoid having problems with every distro ? -- Pasi It might need to be assigned to the kernel team. Besides that, there is also 738085 - Patch to reduce spurious Xen entries in grub menu which has a patch to fix the grub2 menu-thingy.. I'd noticed that - though at present I haven't managed to get F16 Xen to boot in an hvm domain (it hangs when setting up interrupts in the nested dom0). J ___ Xen-devel mailing list xen-de...@lists.xensource.com http://lists.xensource.com/xen-devel ___ Xen-devel mailing list xen-de...@lists.xensource.com http://lists.xensource.com/xen-devel -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
Re: [Xen-devel] Re: Virtualization Test Day for F16 and Xen
On Thu, Sep 22, 2011 at 03:08:41PM -0400, Konrad Rzeszutek Wilk wrote: On Thu, Sep 22, 2011 at 12:47:57PM +0300, Pasi Kärkkäinen wrote: On Wed, Sep 21, 2011 at 06:59:57PM -0400, Konrad Rzeszutek Wilk wrote: On Wed, Sep 21, 2011 at 03:46:31PM -0700, Jeremy Fitzhardinge wrote: On 09/21/2011 01:03 PM, Konrad Rzeszutek Wilk wrote: So, there's a meta-point here: we currently 'require' Beta releases to boot as guests on Xen hosts: The release must boot successfully as a virtual guest in a situation where the virtual host is running a supported Xen implementation I really don't have much knowledge of Xen and haven't followed this discussion closely, but do any currently-known bugs prevent this? If so, please flag them up so they can be considered as Beta blockers...thanks! I filled Bug 740378 - F16: Can't use keyboard when installing F16-Alpha under Xen (regression) as guest which is pretty descripting what is below. Also adding in Jeremy's workaround in it. Though I couldn't repro the general problems I was having - I later did a clean F14 install with no problems. So I don't really know what's going on here; I might try another F16 hvm install to see how it goes. But there is a bona-fide bug that F16 doesn't include xen-platform-pci by default in its initramfs, so it ends up unplugging its emulated devices without discovering the PV ones to replace them... Can you open a BZ at bugzilla.redhat.com please? Also should we change the default xen-platform-pci to =y in upstream Linux .config to avoid having problems with every distro ? Or some form of it. Stefano is working to provide a patch that will latch on CONFIG_PVONHVM and make that work. Ok, great! -- Pasi -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
Re: [Xen-devel] Re: Virtualization Test Day for F16 and Xen
On Wed, Sep 21, 2011 at 04:03:49PM -0400, Konrad Rzeszutek Wilk wrote: So, there's a meta-point here: we currently 'require' Beta releases to boot as guests on Xen hosts: The release must boot successfully as a virtual guest in a situation where the virtual host is running a supported Xen implementation I really don't have much knowledge of Xen and haven't followed this discussion closely, but do any currently-known bugs prevent this? If so, please flag them up so they can be considered as Beta blockers...thanks! I filled Bug 740378 - F16: Can't use keyboard when installing F16-Alpha under Xen (regression) as guest which is pretty descripting what is below. Also adding in Jeremy's workaround in it. Besides that, there is also 738085 - Patch to reduce spurious Xen entries in grub menu which has a patch to fix the grub2 menu-thingy.. I also filed the F16 Xen pvfb problem on rhel5 dom0: Fedora 16 beta Xen pvfb graphical console does not work on rhel5 dom0: https://bugzilla.redhat.com/show_bug.cgi?id=740657 -- Pasi -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
Re: [Xen-devel] Re: Virtualization Test Day for F16 and Xen
On Fri, Sep 16, 2011 at 12:08:40PM +0100, Richard W.M. Jones wrote: On Fri, Sep 16, 2011 at 12:14:23PM +0300, Myroslav Opyr wrote: Hi, What Xen implementation is considered supported for FC16 DomU? Any commonly available upstream Xen releases. Fedora itself (ie. https://fedoraproject.org/wiki/Features/XenPvopsDom0). I think Fedora itself currently has Xen 4.1.1 in F15 and F16. Also Xen in RHEL 5, although that's more of a thing for Red Hat to worry about. Actually F16 PV domU fails to start with vfb (graphical console) on RHEL5 dom0, the vfb never gets to fully initialized state.. so vncviewer won't work for the console. F15 and earlier versions do work OK with pvfb on the same RHEL5 dom0. I'll report to redhat bugzilla soon.. I'm asking because on Xen implementation we were testing yesterday FC16 DomU installation failed compared to FC15 DomU success on the very same Dom0. Are failures like we've encountered candidates for bugreports? Yes. Yeah.. it could be the xen-kbdfront issue.. (it's missing from the F16 installer kernel/initrd). Is there a place (wikipage, bugzilla keyword, etc.) to collect Fedora 16 Xen issues? https://bugzilla.redhat.com/ Product: Fedora. Component: depends on what is failing but common ones would be kernel, anaconda, grubby, grub2, xen, and libvirt. There is also a Fedora Xen mailing list where you can get more detailed help: https://lists.fedoraproject.org/mailman/listinfo/xen -- Pasi Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 80 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora ___ Xen-devel mailing list xen-de...@lists.xensource.com http://lists.xensource.com/xen-devel -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
Re: [Xen-devel] Re: Virtualization Test Day for F16 and Xen / dom0 testing instructions
On Wed, Sep 14, 2011 at 05:45:39PM +0300, Pasi Kärkkäinen wrote:
([3]https://fedorahosted.org/fedora-qa/ticket/219). It takes time
for us
to setup test environment, and would be good to have some info in
advance.
Ok, so some basic steps to test Xen dom0 functionality in Fedora 16:
- Install Fedora 16 Beta TC2 host, to become Xen dom0. Installable ISO images
available here:
http://alt.fedoraproject.org/pub/alt/stage/16-Beta.TC2/Fedora/
(and LIVE ISO's here:
http://alt.fedoraproject.org/pub/alt/stage/16-Beta.TC2/Live/).
- Disk partitioning on the host: First partition should be /boot as ext3,
for the rest of the disk use LVM volume group, and remember to leave free
space in the
volume group so you can later after installation create LVM volumes for the
VMs.
See these tutorials for an example about disk partitioning:
http://wiki.xen.org/xenwiki/Fedora13Xen4Tutorial
http://wiki.xen.org/xenwiki/RHEL6Xen4Tutorial
- After Fedora 16 is installed and everything works properly on baremetal,
including Internet access,
proceed to installing Xen and virtualization related packages:
yum install xen xen-hypervisor xen-runtime libvirt virt-manager virt-viewer
xorg-x11-xauth
- Enable automatic start of xend and libvirtd
chkconfig xend on
chkconfig libvirtd on
chkconfig --list xend
chkconfig --list libvirtd
- Add a suitable grub entry for Xen.
This grub entry is just an example, keep your own root device uuids/names etc
and modify to suit your setup:
menuentry 'Xen dom0, Fedora Linux 3.1.0-rc6' --class fedora --class gnu-linux
--class gnu --class os {
load_video
insmod part_gpt
insmod ext2
set root='(hd0,gpt2)'
search --no-floppy --fs-uuid --set=root
6b84e53a-8a3a-4465-ac5a-c1c98758e448
multiboot /xen-4.1.gz placeholder dom0_mem=1024M loglvl=all
guest_loglvl=all console_to_ring cpuidle=xen
echo'Loading Linux 3.1.0-rc6 ...'
module /vmlinuz-3.1.0-rc6 root=/dev/mapper/VolGroup00-lv_root ro
rd.md=0 rd.dm=0 KEYTABLE=us debug loglvel=8 rd.lvm.lv=VolGroup00/lv_swap
SYSFONT=latarcyrheb-sun16 rd.luks=0 rd.lvm.lv=VolGroup00/lv_root
LANG=en_US.UTF-8
echo'Loading initial ramdisk ...'
module /initramfs-3.1.0-rc6.img
}
grub entries will be automatically generated later, but currently grub/grubby
does not have all required patches to do it automatically.
- Reboot to Xen dom0!
- Verify Xen and xend works:
xm info
xm list
- Verify you have a bridge called virbr0 (use: brctl show). It should get
created by libvirtd.
There should be a dnsmasq process running for virbr0 providing that bridge
a DHCP server with private IPs,
dns relay and NAT to internet, so you can use it for VM network installations.
- Install a Fedora 15 Xen PV domU:
First create a new LVM volume for the VM:
lvcreate -L30G -nf15_disk1 /dev/VolGroup00
(Replace VolGroup00 with your VG name.. use vgdisplay to check.)
Start actual installation:
virt-install -d -n f15 -r 1024 --vcpus=1 -f /dev/VolGroup00/f15_disk1 --vnc
-p -l
ftp://ftp.funet.fi/pub/mirrors/fedora.redhat.com/pub/fedora/linux/releases/15/Fedora/x86_64/os/;
(replace the URL with your local Fedora mirror site).
virt-install will open a virt-viewer (VNC) graphical window of the guest
console (pvfb) where you can do the Fedora installation as usual.
- Install and test various other types of VMs, both PV and HVM.
- Try using file: disk backend (image files) aswell.
- Try using graphical virt-manager GUI to install Xen VMs.
- Disable automatic start of xend, reboot, and test xl / libxl,
also with virt-manager/virt-install.
That should get you started with testing.
Btw. I noticed some issues installing F16 Alpha Xen PV domU, so F16 needs some
more investigation/debugging before F16 final.
-- Pasi
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Re: [Xen-devel] Re: Virtualization Test Day for F16 and Xen
On Wed, Sep 14, 2011 at 10:25:23AM -0400, Konrad Rzeszutek Wilk wrote: On Wed, Sep 14, 2011 at 02:25:52PM +0300, Pasi Kärkkäinen wrote: On Sat, Sep 10, 2011 at 01:33:54AM +0300, Myroslav Opyr wrote: Hi, Hello, Virtualization Test day is expected to be on September 15th this year ([1]https://fedorahosted.org/fedora-qa/ticket/232). Cool. So that's tomorrow! Luckily Xen Hackathon (@Munich) event is just happening, so hopefully we can get some more testing from people in that event. We are willing to help test [2]http://fedoraproject.org/wiki/Features/XenPvopsDom0 but find too little information about test methods It really ought to be parallel to what you would do with KVM/QEMU. Basically the same steps - but I am not sure how well does libvirt work with xm/xl nowadays. Or the virt-manager - but it suppose to interact with magically. libvirt support for xm/xend *should* work, and there's also the libvirt libxl driver written by Jim Fehlig from Novell/SUSE. Is there a KVM/QEMU/libvirt help test Wiki? I saw this: https://fedoraproject.org/wiki/Getting_started_with_virtualization and it kind of parallels it, albeit I didn't see anything about setting the network which sometimes is the biggest pain point: http://www.fedoraforum.org/forum/showthread.php?t=268427 When you install libvirt it'll automatically create/start a bridge called virbr0, which is an host-internal bridge with dnsmasq running and configured to provide dhcp server with private ip range, dns relay and NAT on that bridge. So that's good enough for trying some VMs or running VM netboot installs. ([3]https://fedorahosted.org/fedora-qa/ticket/219). It takes time for us to setup test environment, and would be good to have some info in advance. There are known bugs in FC15/FC16 that have been filled some time ago that folks will sadly run into: 728775, 658387 and 668063 Fortunatly the bugs have patches attached and the files to be modified are shell scripts. Yep, links here: https://bugzilla.redhat.com/show_bug.cgi?id=728775 https://bugzilla.redhat.com/show_bug.cgi?id=658387 https://bugzilla.redhat.com/show_bug.cgi?id=668063 -- Pasi Regards, I just added some Xen related mailinglists to the CC list, so we can get more feedback. Thanks, -- Pasi ___ Xen-devel mailing list xen-de...@lists.xensource.com http://lists.xensource.com/xen-devel -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
