xen October 2008

xen@lists.fedoraproject.org

16 participants
6 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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rawhide domU on RHEL5.2 dom0?
by Jon Stanley 16 Dec '08

16 Dec '08

I can't seem to make a rawhide domU work on a RHEL5.2 dom0, because virt-install doesn't think that there's a valid tree. Looking at it, there is indeed no images/xen in the tree, are we using the standard kernel for DomU's now, or is F10 not going to be supported as a domU? This is on x86_64.

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libvirt-0.4.6 for Fedora 8 ?
by Daniel Veillard 05 Nov '08

05 Nov '08

has been available for a few weeks: https://admin.fedoraproject.org/updates/F8/FEDORA-2008-8447 on one hand F-8 is near its End Of Life and F8 has been used by people who needed Xen support. On the other hand libvirt in F-8 is a bit ancient. I'm unclear if people really want the update before the EOL, there is a report that this worked fine for Xen users but there is always a risk of pushing an update like this so late in the cycle. Opinion welcome, by default I don't plan to push the update to stable but if people want this, either grab it from testing of just ask here, I don't have any strong opinion, just keeping the status-quo by default. Daniel -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/

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IO performance sanity check
by Ask Bjørn Hansen 24 Oct '08

24 Oct '08

Hi everyone, In the dom0 I get about ~120MB/sec sequential write speed to a raid10 device. In the domU I get: phy to lvm volume on raid10: 22MB/sec tap:aio to non-sparse file on raid10: ~22MB/sec I've usually avoided putting anything that needed IO performance on Xen, but now I had a few applications that'd fit well in Xen but need a little bit of disk IO. I was surprised just how poorly it works. Is this kind of performance really what to expect? Anything configuration that can be done to improve it? Anyone with experience of how the comparable performance with KVM? - ask -- http://develooper.com/ - http://askask.com/

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input on F10 virtualization release notes
by Dale Bewley 08 Oct '08

08 Oct '08

I've been working on the virtualization release notes[1] for Fedora 10 these past several days, and I'm looking for input from those in the know. The advances coming out of the Emerging Technologies projects and Fedora in general are very impressive, and I'd like to do them justice. I added a lot of content quickly yesterday, and the page structure is by no means solid, but there is a pending freeze[2] on October 10th. I'd like to get it into the best and most accurate shape possible before then. There will be a chance to make updates again before the F10 release. I've attempted to describe the improvements to virtualization-related packages between the F9 release versions and the anticipated F10 versions. I've created a table[3] of those versions to help with the comparison. I'd appreciate it if you'd let me know: * if you believe a version bump is pending * if I've left out any packages or features * if I included something not noteworthy * anything else you have to say If you have any comments, contributions, or criticisms at all, please add them to the wiki article/talk page/or email them to me. Thanks! And keep up the great work! [1] https://fedoraproject.org/wiki/Docs/Beats/Virtualization [2] http://poelstra.fedorapeople.org/schedules/f-10/f-10-docs-tasks.html [3] https://fedoraproject.org/wiki/DaleBewley#Virtualization_Release_Notes -- Dale Bewley - Unix Administrator - Shields Library - UC Davis GPG: 0xB098A0F3 0D5A 9AEB 43F4 F84C 7EFD 1753 064D 2583 B098 A0F3

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xen kernel with dom0 in Fedora 10?
by David Hláčik 01 Oct '08

01 Oct '08

Hi , guys, I have found in Fedora 10 Features , that there is still a lot of work to provide xen kernel with dom0 support to Fedora 10 GA. For my future project, which at 90 percent depends on virtualization technology I am deciding between XEN or KVM virtualization. I am experienced XEN user, KVM is new for me. But as I am aware of, Qumranet was bought by RedHat which predicts something ... Thanks in advance! David

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xen October 2008