xen February 2009

xen@lists.fedoraproject.org

13 participants
11 discussions

Dom0 kernels
by M A Young 13 Mar '10

13 Mar '10

I have built a new set of kernel packages based on fedora rawhide kernels and the xen/dom0/hackery branch of Jeremy's git repository ( http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=summary ). This batch (kernel-2.6.29-0.114.2.6.rc6.fc11) is available via the koji build system at http://koji.fedoraproject.org/koji/taskinfo?taskID=1149500 These are really for development and debugging purposes only, as I am still having problems getting them to boot, but others have reported more success at getting kernels based on this git repository working, so you might be lucky. Note to install these packages on Fedora 10 you will need to have rpm-4.6.0-1.fc10 installed (currently in updates-testing but it should be available in updates soon) because of the change to SHA-256 file digest hashing in recent Fedora 11 builds. Michael Young

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Guest shutdown problems
by Christian Axelsson 02 Apr '09

02 Apr '09

Hello I have a problem shutting down xen guests. Using xm shutdown guests get shut down but gets stuck in state '---s-d' or sometimes '------'. When trying to clone a domain when in this state (my original purpose of the whole operation) I'll get the error: [root@hydra virtinst--devel]# ./virt-clone -o minimal -n new_img -f /var/lib/xen/images/new_img.img ERROR: virDomainGetXMLDesc() failed failed Xen syscall xenDaemonDomainDumpXMLByID failed to find this domain -490299505 The same errors occurs when for example trying to attach to the console using virsh. I have tried to use 'xm destroy' to kill the guest the hard way but it has no effect - the state remains unchanged. I have also tried this on a few different guest installations with the same result. A thing worth noting is that the output from 'xm list --long' differs, I've attached the out put pre boot, after boot and after shutdown. Note how all the devices in the guests are missing after shutdown. Both the hosts and the guests are fedora 8 installations. Regards, Christian Axelsson smiler(a)lanil.mine.nu [?1034h(domain (domid 0) (on_crash restart) (uuid 00000000-0000-0000-0000-000000000000) (bootloader_args ) (vcpus 2) (name Domain-0) (on_poweroff destroy) (on_reboot restart) (bootloader ) (maxmem 16777215) (memory 1491) (shadow_memory 0) (cpu_weight 256) (cpu_cap 0) (features ) (on_xend_start ignore) (on_xend_stop ignore) (cpu_time 1644.84369405) (online_vcpus 2) (image (linux (kernel ))) (status 2) (state r-----) ) (domain (domid 2) (on_crash restart) (uuid a7638797-e237-3891-5e64-390f828238ca) (bootloader_args ) (vcpus 1) (name minimal) (on_poweroff destroy) (on_reboot restart) (bootloader /usr/bin/pygrub) (maxmem 512) (memory 512) (shadow_memory 0) (cpu_weight 256) (cpu_cap 0) (features ) (on_xend_start ignore) (on_xend_stop ignore) (start_time 1206360333.14) (cpu_time 9.753408915) (online_vcpus 1) (image (linux (kernel ) (notes (FEATURES 'writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel' ) (VIRT_BASE 18446744071562067968) (GUEST_VERSION 2.6) (PADDR_OFFSET 18446744071562067968) (GUEST_OS linux) (HYPERCALL_PAGE 18446744071564189696) (LOADER generic) (SUSPEND_CANCEL 1) (ENTRY 18446744071564165120) (XEN_VERSION xen-3.0) ) ) ) (status 2) (state -b----) (store_mfn 196619) (console_mfn 196618) (device (vif (bridge xenbr0) (mac 00:16:3e:3f:93:b8) (script vif-bridge) (uuid 94afd732-920b-2e0b-b3d5-e79174754a80) (backend 0) ) ) (device (vbd (uname file:/var/lib/xen/images/minimal.img) (uuid 8f4f4da3-5f8a-3fee-28e8-41dc49e876cd) (mode w) (dev xvda:disk) (backend 0) (bootable 1) ) ) (device (console (protocol vt100) (location 2) (uuid 0046f2d3-058b-d524-9273-f1dac2ca950b) ) ) ) [?1034h(domain (domid 0) (on_crash restart) (uuid 00000000-0000-0000-0000-000000000000) (bootloader_args ) (vcpus 2) (name Domain-0) (on_poweroff destroy) (on_reboot restart) (bootloader ) (maxmem 16777215) (memory 1491) (shadow_memory 0) (cpu_weight 256) (cpu_cap 0) (features ) (on_xend_start ignore) (on_xend_stop ignore) (cpu_time 1648.92600832) (online_vcpus 2) (image (linux (kernel ))) (status 2) (state r-----) ) (domain (domid 2) (on_crash restart) (uuid a7638797-e237-3891-5e64-390f828238ca) (bootloader_args ) (vcpus 1) (name minimal) (on_poweroff destroy) (on_reboot restart) (bootloader /usr/bin/pygrub) (maxmem 512) (memory 512) (shadow_memory 0) (cpu_weight 256) (cpu_cap 0) (features ) (on_xend_start ignore) (on_xend_stop ignore) (start_time 1206360333.14) (cpu_time 13.048743365) (online_vcpus 1) (image (linux (kernel ) (notes (FEATURES 'writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel' ) (VIRT_BASE 18446744071562067968) (GUEST_VERSION 2.6) (PADDR_OFFSET 18446744071562067968) (GUEST_OS linux) (HYPERCALL_PAGE 18446744071564189696) (LOADER generic) (SUSPEND_CANCEL 1) (ENTRY 18446744071564165120) (XEN_VERSION xen-3.0) ) ) ) (status 0) (state ---s-d) (store_mfn 196619) (console_mfn 196618) ) [?1034h(domain (domid 0) (on_crash restart) (uuid 00000000-0000-0000-0000-000000000000) (bootloader_args ) (vcpus 2) (name Domain-0) (on_poweroff destroy) (on_reboot restart) (bootloader ) (maxmem 16777215) (memory 1491) (shadow_memory 0) (cpu_weight 256) (cpu_cap 0) (features ) (on_xend_start ignore) (on_xend_stop ignore) (cpu_time 1635.21430615) (online_vcpus 2) (image (linux (kernel ))) (status 2) (state r-----) ) (domain (on_crash restart) (uuid a7638797-e237-3891-5e64-390f828238ca) (bootloader_args ) (vcpus 1) (name minimal) (on_poweroff destroy) (on_reboot restart) (bootloader /usr/bin/pygrub) (maxmem 512) (memory 512) (shadow_memory 0) (cpu_weight 256) (cpu_cap 0) (features ) (on_xend_start ignore) (on_xend_stop ignore) (start_time 1206309092.82) (cpu_time 0.0) (image (linux (kernel ) (notes (FEATURES 'writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel' ) (VIRT_BASE 18446744071562067968) (GUEST_VERSION 2.6) (PADDR_OFFSET 18446744071562067968) (GUEST_OS linux) (HYPERCALL_PAGE 18446744071564189696) (LOADER generic) (SUSPEND_CANCEL 1) (ENTRY 18446744071564165120) (XEN_VERSION xen-3.0) ) ) ) (status 0) (device (vif (bridge xenbr0) (mac 00:16:3e:3f:93:b8) (backend 0) (uuid 94afd732-920b-2e0b-b3d5-e79174754a80) (script vif-bridge) ) ) (device (vbd (uuid 8f4f4da3-5f8a-3fee-28e8-41dc49e876cd) (bootable 1) (driver paravirtualised) (dev xvda:disk) (uname file:/var/lib/xen/images/minimal.img) (mode w) (backend 0) ) ) (device (console (protocol vt100) (location 2) (uuid 0046f2d3-058b-d524-9273-f1dac2ca950b) ) ) )

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Adding qemu disable pci devices patch to Fedora Xen
by Pasi Kärkkäinen 02 Mar '09

02 Mar '09

Hello. Would it be possible to add Qemu "disable pci devices" patch to Fedora Xen packages? It allows HVM domains (or more specifically PV drivers running in HVM domains) to hide qemu emulated disk/network devices in a sane way to prevent possible corruption and other problems when both the PV devices and Qemu emulated devices are present at the same time.. It's mostly needed for Xen gplpv drivers by James Harper. The same code/feature is also being used by Citrix/Xensource commercial Windows PV drivers. The patch has been in xen-unstable (3.4) for a while already without problems. Patch against Xen 3.3.1 (by James Harper): http://www.meadowcourt.org/downloads/qemu_disable_patches.zip Discussion about it on xen-devel: http://lists.xensource.com/archives/html/xen-devel/2009-01/msg00705.html This would be a needed feature soon when HVM domains start working ok with pv_ops dom0 :) -- Pasi

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Xen to KVM Migration - How to resize LVM Partisions using KVM
by MOHAMMAD MATEEN ASLAM 01 Mar '09

01 Mar '09

Hi, I am migrating from Xen to KVM. I have created a VM which is based on LVM (/dev/VolGroupV00/vm). I have installed FC-10 on VM with swap, / and /var partisions. Now i want to resize my / and /var partisions. I have resized LVM (/dev/VolGroupV00/vm), how to resize inner partisions (/, /var) of LVM ? Can anyone guide me how KVM deals with LVM and how to manage resizing in a painless way. Regards Mohammad Mateen _________________________________________________________________ Windows Live™ Contacts: Organize your contact list. http://windowslive.com/connect/post/marcusatmicrosoft.spaces.live.com-Blog-…

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Dom0 Xen kernel RPM
by M A Young 14 Feb '09

14 Feb '09

I have built a kernel based on kernel-2.6.29-0.41.rc2.fc11.src.rpm and Changeset 2342 from http://xenbits.xen.org/paravirt_ops/patches.hg/ and uploaded selected files which are at http://compsoc.dur.ac.uk/~may/xen/kernel-2.6.29-0.41.rc2.pvops2342.fc10.src… http://compsoc.dur.ac.uk/~may/xen/kernel-2.6.29-0.41.rc2.pvops2342.fc10.x86… http://compsoc.dur.ac.uk/~may/xen/kernel-firmware-2.6.29-0.41.rc2.pvops2342… I got it to boot as Dom0 with a Rawhide based live CD image on a USB stick with several kernel tracebacks. I have not managed to get it to boot on my main Fedora 10 system either dom0 or as an ordinary kernel (but nor does the the unaltered kernel - presumably there is some incompatibility between Fedora 10 systems and Fedora 11 kernels that I haven't spotted yet), so you use it very much at your own risk. Michael Young

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Fedora 10 on RHEL5.3 x86_64
by Mike McGrath 13 Feb '09

13 Feb '09

Anyone having issues doing F10 on RHEL5.3? I'm seeing this (with debug enabled: hu, 12 Feb 2009 16:00:18 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:18 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:18 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:18 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:19 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:19 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:19 DEBUG Removing /var/lib/xen/virtinst-vmlinuz.V9IWB3 Thu, 12 Feb 2009 16:00:19 DEBUG Removing /var/lib/xen/virtinst-initrd.img.tUWkKJ ERROR: It appears that your installation has crashed. You should be able to find more information in the logs Except the info in the logs isn't very revealing. I get this when doing a virt-install -p. any ideas? -Mike

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RE: Fedora-xen Digest, Vol 39, Issue 8
by Jon Swanson 12 Feb '09

12 Feb '09

Hey Mike, If you are trying to boot an x86_64 f10 domU, you might want to check to make sure that the host supports the NX cpu flag. This might not have anything to do with your issue, but worth checking. https://bugzilla.redhat.com/show_bug.cgi?id=480880 http://forums.fedoraforum.org/showthread.php?t=210763 -----Original Message----- From: fedora-xen-bounces(a)redhat.com [mailto:fedora-xen-bounces@redhat.com] On Behalf Of fedora-xen-request(a)redhat.com Sent: Friday, February 13, 2009 2:00 AM To: fedora-xen(a)redhat.com Subject: Fedora-xen Digest, Vol 39, Issue 8 Send Fedora-xen mailing list submissions to fedora-xen(a)redhat.com To subscribe or unsubscribe via the World Wide Web, visit https://www.redhat.com/mailman/listinfo/fedora-xen or, via email, send a message with subject or body 'help' to fedora-xen-request(a)redhat.com You can reach the person managing the list at fedora-xen-owner(a)redhat.com When replying, please edit your Subject line so it is more specific than "Re: Contents of Fedora-xen digest..." Today's Topics: 1. Fedora 10 on RHEL5.3 x86_64 (Mike McGrath) ---------------------------------------------------------------------- Message: 1 Date: Thu, 12 Feb 2009 10:03:50 -0600 (CST) From: Mike McGrath <mmcgrath(a)redhat.com> Subject: [Fedora-xen] Fedora 10 on RHEL5.3 x86_64 To: fedora-xen(a)redhat.com Message-ID: <alpine.LFD.2.00.0902121002570.7440(a)laptop.mmcgrath.net> Content-Type: TEXT/PLAIN; charset=US-ASCII Anyone having issues doing F10 on RHEL5.3? I'm seeing this (with debug enabled: hu, 12 Feb 2009 16:00:18 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:18 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:18 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:18 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:19 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:19 DEBUG No guest running yet virDomainLookupByName() failed Domain not found: xenUnifiedDomainLookupByName Thu, 12 Feb 2009 16:00:19 DEBUG Removing /var/lib/xen/virtinst-vmlinuz.V9IWB3 Thu, 12 Feb 2009 16:00:19 DEBUG Removing /var/lib/xen/virtinst-initrd.img.tUWkKJ ERROR: It appears that your installation has crashed. You should be able to find more information in the logs Except the info in the logs isn't very revealing. I get this when doing a virt-install -p. any ideas? -Mike ------------------------------ -- Fedora-xen mailing list Fedora-xen(a)redhat.com https://www.redhat.com/mailman/listinfo/fedora-xen End of Fedora-xen Digest, Vol 39, Issue 8 *****************************************

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3 failed approaches to create guest domains
by Siddharth Wagh 12 Feb '09

12 Feb '09

Hello all, I am a Masters student working on my thesis and have to go use Xen for live migration purposes. I have a Xen installation on Fedora 8, and been trying for past 3 months to create guest domains and get them running for further migration work. I took 3 different approaches, but got stuck with each of those. I would be very grateful if you could point out as to where I am going wrong... * 1. Basic command: xm create -c vm01-config.sxp vmid=1* The config file is kept in /etc/xen folder. ERROR: VFS: Cannot open root device "hd0" or unknown-block(0,0) Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) WHAT I PUT IN: root = '/dev/hd0' or '/dev/hda' or '/dev/sda2' None worked. I am not sure what the option should be. * 2. Using the command: virt-install -f /etc/xen/xen1 -r 256* WHAT IT DOES: Asks for config parameters and creates virtual machine, but I am not sure how to proceed with completion process. In the install location, I put in a OS image at a mirror site: http://ringtail.its.monash.edu.au/pub/fedora/linux/releases/8/Fedora/i386/o… ERROR: Unable to find image at given location This is the only approach which creates a VM, but the machine is not completely running (not functional or doesnt consume any memory). Am I supposed to have the guest image on my machine? *3. Using "virt-manager" in GUI* ERROR: Asks for "Connect to host network" *but "shared physical devices" list is empty*. It is supposed to list eth0, peth0 etc. Something to do with creating a bridge. I tried the approach of NAT, but for that I have to use approach 1 to create a machine, which gets stuck on "root" error. Libvirtd is not running. It gave the message: libvir: Remote error : Connection refused libvir: warning : Failed to find the network: Is the daemon running ? libvir: Remote error : Connection refused xend is running, I checked status. If anyone could devote a little of their time to help me out, as I am not comfortable with kernel administration/OS admin, I would be really thankful. Thanks & Regards, Siddharth Wagh ----------------------------------------------------------------------------------------- To ensure perfect aim, shoot first and call whatever you hit the target... -----------------------------------------------------------------------------------------

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Re: [fedora-virt] bzImage dom0 kernel support in latest rawhide Xen packages
by Pasi Kärkkäinen 09 Feb '09

09 Feb '09

On Tue, Feb 03, 2009 at 10:18:53PM -0200, Itamar Reis Peixoto wrote: > I need to configure something to boot dom0 ? > Well you need to have dom0 kernel.. (there's no dom0 capable kernel in fedora/rawhide yet, so you need to compile/build/get one yourself). Nothing to configure really.. just configure grub.conf in the normal way to boot Xen and dom0 kernel. -- Pasi > > On Tue, Feb 3, 2009 at 6:24 PM, Pasi Kärkkäinen <pasik(a)iki.fi> wrote: > > Hello! > > > > For those interested in testing pv_ops dom0 kernels it seems latest Xen > > packages in rawhide contain bzImage dom0 kernel support in Xen hypervisor. > > > > > > rawhide report: 20090203 changes > > > > > > xen-3.3.1-3.fc11 > > ---------------- > > * Tue Feb 3 17:00:00 2009 Gerd Hoffmann <kraxel(a)redhat.com> - 3.3.1-3 > > - backport bzImage support for dom0 builder. > > > > > > -- Pasi > > > > _______________________________________________ > > Fedora-virt mailing list > > Fedora-virt(a)redhat.com > > https://www.redhat.com/mailman/listinfo/fedora-virt > > > > > > -- > ------------ > > Itamar Reis Peixoto > > e-mail/msn: itamar(a)ispbrasil.com.br > sip: itamar(a)ispbrasil.com.br > skype: itamarjp > icq: 81053601 > +55 11 4063 5033 > +55 34 3221 8599

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bzImage dom0 kernel support in latest rawhide Xen packages
by Pasi Kärkkäinen 03 Feb '09

03 Feb '09

Hello! For those interested in testing pv_ops dom0 kernels it seems latest Xen packages in rawhide contain bzImage dom0 kernel support in Xen hypervisor. rawhide report: 20090203 changes xen-3.3.1-3.fc11 ---------------- * Tue Feb 3 17:00:00 2009 Gerd Hoffmann <kraxel(a)redhat.com> - 3.3.1-3 - backport bzImage support for dom0 builder. -- Pasi

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xen February 2009