xen December 2008

xen@lists.fedoraproject.org

20 participants
24 discussions

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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Should kernel 2.6.27.5-41.fc9 boot as xen guest?
by M A Young 28 Jan '09

28 Jan '09

I was trying to get a NVIDIA video driver working with the Fedora 9 kernel 2.6.27.5-41.fc9 (on x86_64) and it refused because it decided it was a xen kernel, so I thought I would check this claim out. My attempts to boot a xen guest with that kernel failed, though it got past the boot loader stage, and I know Fedora 9 has kernel-xen packages, but I was wondering whether this kernel would be expected to work or not. Michael Young

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Updating out-of-date Fedora XenPvopsDom0 wiki page
by Pasi Kärkkäinen 22 Jan '09

22 Jan '09

Hi! http://fedoraproject.org/wiki/Features/XenPvopsDom0 Could someone with wiki access update that page.. it contains a lot of out-of-date information. That page is also referenced in F10 release notes.. Things like: - "Work on getting Dom0 support in the upstream kernel has pretty much stalled for the last number of months so this feature is postponed until work upstream restarts." - "Last updated: 2008-07-30" - "x86_64 Dom0 No active work yet...." And many more things are out-of-date, because they're based on earlier work by Redhat/Fedora people.. Upstream (Xensource) is actively working on pv_ops dom0 now, and it's getting close to being included upstream. latest pv_ops dom0 patches: http://xenbits.xen.org/paravirt_ops/patches.hg/ Xen wiki pv_ops status page: http://wiki.xensource.com/xenwiki/XenParavirtOps -- Pasi

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Turning off virt-manager dhcp and dns
by Stephen Johnston 14 Jan '09

14 Jan '09

Hi I have virt-manager with a static ip'ed windows server 2003 and a win xp client so I can play with active directory etc for work. All under Fedora 10 beta. Can someone tell me if I can turn off the dhcp and dns in the virt-manager framework (vibr0) as it is handing out an ip to my client before the virtual windows server does. I believe this is confusing the issue when I try to join the client to my virtual windows domain. I only wish the virt-manager to nat vibr0 to my physical nic so i can provide the other config items from within my virtual network. Thank you. Stephen -- Stephen Johnston 8 Lime Grove Tel. +44 (0)1506 437766 Craigshill Mob. 07786 733 150 Livingston West Lothian EH54 5FB

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Create multiple loopback devices
by Guillaume 07 Jan '09

07 Jan '09

Hi I would like to know if it is possible to create multiple loopback ethernet device. And if yes, how to create new one. The purpose of this is to attach to many vm this interface, and then, share this private network between these vm. Thanks. -- Guillaume

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VFS: Cannot open root device
by Siddharth Wagh 22 Dec '08

22 Dec '08

how do i know what the root partition is? i gave the option: root="/dev/hda" in the config file. Thanks & Regards, Siddharth Wagh ----------------------------------------------------------------------------------------- To ensure perfect aim, shoot first and call whatever you hit the target... -----------------------------------------------------------------------------------------

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Problem Having Fedora 10 Guest See USB Devices (AVC Denied Message, Too...)
by Robert L Cochran 20 Dec '08

20 Dec '08

I have a Fedora 10 x86_64 host running a Fedora 10 x86_64 guest under KVM. I want to be able to plug a USB flash drive in and have the guest able to read and write to that device. According to the libvirt.org XML format suggestions, the way to that is with a <hostdev> container. Here is how I added it to the xml for my guest machine. Note that this doesn't mean I added it correctly, though: <domain type='kvm'> <name>fedora10x64</name> <uuid>33e7e731-4e18-dd90-222e-b1df83a76cad</uuid> <memory>2097152</memory> <currentMemory>2097152</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset="localtime"/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/fedora10x64.img'/> <target dev='vda' bus='virtio'/> </disk> <interface type='bridge'> <source bridge='br0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> <hostdev mode='subsystem' type='usb'> <source> <vendor id='0x12f7'/> <product id='0x1a00'/> </source> </hostdev> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> <sound model='es1370'/> </devices> </domain> When I launch Virtual Machine Manager, open the Fedora 10 guest, and click the Run button, I get an immediate AVC denied message. Dec 20 13:54:45 deafeng3 setroubleshoot: SELinux is preventing qemu (qemu-kvm) "read" to ./devices (usbfs_t). For complete SELinux messages. run sealert -l 33327e80-28c3-460a-a759-dfae737c863b Here are the `sealert` details: [root@deafeng3 qemu]# sealert -l 33327e80-28c3-460a-a759-dfae737c863b Summary: SELinux is preventing qemu (qemu-kvm) "read" to ./devices (usbfs_t). Detailed Description: SELinux denied qemu access to ./devices. If this is a virtualization image, it has to have a file context label of virt_image_t. The system is setup to label image files in directory./var/lib/libvirt/images correctly. We recommend that you copy your image file to /var/lib/libvirt/images. If you really want to have your qemu image files in the current directory, you can relabel ./devices to be virt_image_t using chcon. You also need to execute semanage fcontext -a -t virt_image_t './devices' to add this new path to the system defaults. If you did not intend to use ./devices as a qemu image it could indicate either a bug or an intrusion attempt. Allowing Access: You can alter the file context by executing chcon -t virt_image_t './devices' You must also change the default file context files on the system in order to preserve them even on a full relabel. "semanage fcontext -a -t virt_image_t './devices'" Fix Command: chcon -t virt_image_t './devices' Additional Information: Source Context system_u:system_r:qemu_t:s0 Target Context system_u:object_r:usbfs_t:s0 Target Objects ./devices [ file ] Source qemu-kvm Source Path /usr/bin/qemu-kvm Port <Unknown> Host deafeng3.signtype.info Source RPM Packages kvm-74-6.fc10 Target RPM Packages Policy RPM selinux-policy-3.5.13-34.fc10 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name qemu_file_image Host Name deafeng3.signtype.info Platform Linux deafeng3.signtype.info 2.6.27.7-134.fc10.x86_64 #1 SMP Mon Dec 1 22:21:35 EST 2008 x86_64 x86_64 Alert Count 3 First Seen Fri Dec 19 11:01:52 2008 Last Seen Sat Dec 20 13:54:45 2008 Local ID 33327e80-28c3-460a-a759-dfae737c863b Line Numbers Raw Audit Messages node=deafeng3.signtype.info type=AVC msg=audit(1229799285.706:69): avc: denied { read } for pid=4276 comm="qemu-kvm" name="devices" dev=usbfs ino=341 scontext=system_u:system_r:qemu_t:s0 tcontext=system_u:object_r:usbfs_t:s0 tclass=file node=deafeng3.signtype.info type=SYSCALL msg=audit(1229799285.706:69): arch=c000003e syscall=2 success=no exit=-13 a0=54c733 a1=0 a2=1b6 a3=7fe48d8d16f0 items=0 ppid=2903 pid=4276 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="qemu-kvm" exe="/usr/bin/qemu-kvm" subj=system_u:system_r:qemu_t:s0 key=(null) Is there a way to fix this so I can have my Fedora 10 guest read and write to USB devices? Thanks Bob Cochran

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[Fwd: Re: [Fedora-xen] Using Wireless Connection In KVM]
by Robert L Cochran 20 Dec '08

20 Dec '08

Daniel P. Berrange wrote: > On Wed, Dec 17, 2008 at 05:39:03PM -0500, Robert L Cochran wrote: > >> How can I get my Fedora 10 guest to use a wireless connection? Do I need >> to configure a wireless "bridge" adapter? That is, if the wired adapter >> bridge is ifcfg-eth0 referencing "br0" perhaps I need a second named >> ifcfg-wlan0 referencing "br1"? >> >> In short: does anyone have wireless working for Fedora 10, KVM guests? >> If yes, can the configuration details be shared with me? I'm dying to >> use wireless in my guest. Laptops were never meant for long trailing >> wires if you ask me... >> > > Wireless + bridging == fail. > > When creating the guest you should use libvirt's 'default' virtual > network, which is NAT based and specifically designed to play nicely > with NetworkManager > > http://wiki.libvirt.org/page/Networking > > So no matter what wifi network/adress your host has, the guest will still > get outbound traffic through > > Daniel > Thanks for the advice. I want to be able to use wireless, but still get a specific IP address on my home network in the 192.168.1.x range. The virtual network doesn't use that address range by default. I guess I could kludge this...I'll have to think carefully about the networking that I'm doing. Bob

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RE: Urgent Help Required: FC10 as DomU on FC8 as Dom0
by MOHAMMAD MATEEN ASLAM 19 Dec '08

19 Dec '08

I have FC8 running as dom0 and i want to install FC10 as domU. I have installed python-virtinst-0.300.2-5.fc8 from fedora standard repo on FC8. But still i am unable to boot FC10 kernel on FC8. Following error comes when I try to boot F10 with Ramdisk created on FC8/ Dom0. # xm create -c xxx.cfg ........ Creating root device. Mounting root filesystem. mount: could not find filesystem '/dev/root' Setting up other filesystems. Setting up new root fs setuproot: moving /dev failed: No such file or directory no fstab.sys, mounting internal defaults setuproot: error mounting /proc: No such file or directory setuproot: error mounting /sys: No such file or directory Switching to new root and running init. unmounting old /dev unmounting old /proc unmounting old /sys switchroot: mount failed: No such file or directory Booting has failed. .................................................................... Here is my xen configuration file. ----------------------------------------- kernel = "/boot/vmlinuz-2.6.27.7-134.fc10.i686.PAE" ramdisk = "/boot/initrd-2.6.27.7-134.fc10.i686.PAE-DomU.img" memory = 128 name = "xxxx" vif = [ 'ip=xx.xxx.xxxx.xxx' ] disk = ['tap:aio:/var/vm13/root,sda1,w', 'tap:aio:/var/vm13/var,sda2,w', 'tap:aio:/var/vm13/swap,sda3,w'] root = "/dev/sda1 ro" on_reboot = 'restart' on_crash = 'restart' ------------------------------------------ How to boot FC-10 as domU on FC8? I will appreciate help from xen experts. Regards. Mateen _________________________________________________________________ Send e-mail anywhere. No map, no compass. http://windowslive.com/Explore/hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_anywhe…

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Dom0 Xen kernel on Fedora 10
by M A Young 19 Dec '08

19 Dec '08

I have succeeded in getting a fedora based kernel to build with Dom0 patches added. The steps were roughly as follows; 1. Start from kernel-2.6.28-0.106.rc6.git4.fc11.src.rpm 2. Create a patch from http://xenbits.xen.org/paravirt_ops/patches.hg/ changeset 2238 by concatenating those patches listed in the series file (excluding those commented out) together. 3. Edit kernel.spec to revert to plain rc6 (which the pvops patches seem currently to be based on though some patches from rc8 seem to be included in the x86/x86.patch file), add the combined patch, and increase the fuzz factor to 2 so it applies. 4. Make several edits to the source files and configuration options to get it to compile on F10. Some of these, such as the couple I have so far reported on http://bugzilla.redhat.org/ (476456 and 476457), are due to code problems that show up because the F10 compiler seems to be a bit better at checking for errors. If anyone wants to inspect it, the source rpm generated is at http://compsoc.dur.ac.uk/~may/xen/kernel-2.6.28-0.106.rc6.fc10.src.rpm It is completely untested beyond the fact that it compiles for me, so I have no idea if a kernel built from it will actually boot. Michael Young

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