January 2014 - Users - libvirt List Archives

[libvirt-users] some problem with snapshot by libvirt
by xingxing gao 22 Nov '14

22 Nov '14

Hi,all,i am using libvirt to manage my vm,in these days i am testing the libvirt snapshot ,but meet some problem: the snapshot was created from this command: snapshot-create-as win7 --disk-only --diskspec vda,snapshot=external --diskspec hda,snapshot=no but when i tried to revert from the snapshot which created from the above command ,i got error below: virsh # snapshot-revert win7 1338041515 --force error: unsupported configuration: revert to external disk snapshot not supported yet version: virsh # version Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 1.0.93

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[libvirt-users] libvirt-1.2.0
by cool dharma06 04 Feb '14

04 Feb '14

hi, i am using libvirt-1.2.0 which is installed from source. Which i am using to launch instance on xen. its working fine when i am launching vm from the root user. But i am entered as another user means its throwing the error. And libvirt is working fine in that user except the creating vm: Please refer the following things: eucalyptus@cooldharma06:/opt/i-47FD0798$ virsh -c xen:/// WARNING: gnome-keyring:: couldn't connect to: /home/dharmalingams/.cache/keyring-r004e7/pkcs11: Permission denied Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # version Compiled against library: libvirt 1.2.0 Using library: libvirt 1.2.0 Using API: Xen 1.2.0 Running hypervisor: Xen 4.3.0 virsh # list Id Name State ---------------------------------------------------- *virsh # create libvirt_sec.xml * *error: Failed to create domain from libvirt_sec.xml* *error: access denied* >From the libvirtd.log: 2014-01-31 09:46:16.329+0000: 27937: error : virAccessDriverPolkitCheck:176 : access denied: Policy kit denied action org.libvirt.api.domain.write from 28281,1877379: exit status 1 2014-01-31 09:46:16.329+0000: 27937: error : virAccessManagerSanitizeError:203 : access denied 2014-01-31 09:46:16.329+0000: 27937: error : virAccessManagerSanitizeError:203 : access denied Suggest me some solution to solve this one. Thanks & Regards, cooldharma06.

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[libvirt-users] Trouble configuring with macvtap passthrough on Debian Wheezy / Jessie
by Richard Gomes 03 Feb '14

03 Feb '14

( Posting again. Correct subject line now! ) Hello, I'm trying to use macvtap on Debian Wheezy. Actually, I've installed a recent version of libvirt and qemu from Jessie, using wheezy-backports. $ virsh version Compiled against library: libvirt 1.2.1 Using library: libvirt 1.2.1 Using API: QEMU 1.2.1 Running hypervisor: QEMU 1.7.0 I'm trying to configure a macvtap interface like this: <interface type='direct'> <mac address='52:54:00:7b:05:cd'/> <source dev='eth1' mode='passthrough'/> <model type='rtl8139'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </interface> The interface eth1 is used exclusively by this VM, so as far as I understand, mode 'passthrough' is enough since I'd like to "plug" the VM straight onto a public static IP. On my /etc/networks/interfaces, I have this: # start :: define eth1 iface eth1 inet manual # end :: define eth1 It does not matter whether eth1 is up or down, when I try to start the VM, I get the following error: Error starting domain: Cannot create macvlan devices on this platform: Function not implemented Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 45, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 66, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1114, in startup self._backend.create() File "/usr/lib/python2.7/dist-packages/libvirt.py", line 866, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: Cannot create macvlan devices on this platform: Function not implemented Trying to solve the issue, I found this: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=737097 I've tried to rebuild the package from Debian sources, but apparently, macvtap is already defined, as I've reported to another mailing list. For your information: > I'm new to building packages from Debian sources, so I followed > instructions from > > https://wiki.debian.org/HowToPackageForDebian#Building_Debian_packages > > $ apt-get -t wheezy-backports source libvirt > $ cd libvirt-0.9.12.3/ > $ sudo apt-get build-dep libvirt > $ debuild -i -us -uc -b > > So... yes, it works and builds without any errors. > > Next step now is applying the changes mentioned. > But I'm confused because /apparently/ debian/rules is already the way > it should be. > > ifneq (,$(findstring $(DEB_HOST_ARCH_OS), linux)) > WITH_STORAGE_LVM = --with-storage-lvm > WITH_STORAGE_ISCSI = --with-storage-iscsi > WITH_STORAGE_DISK = --with-storage-disk > WITH_UDEV = --with-udev --without-hal > WITH_CAPNG = --with-capng > WITH_POLKIT = --with-polkit > * WITH_MACVTAP = --with-macvtap** > ** WITH_NETWORK = --with-network** > * WITH_QEMU = --with-qemu > WITH_OPENVZ = --with-openvz > WITH_NETCF = --with-netcf > ifneq (,$(findstring $(DEB_HOST_ARCH), amd64 i386 ia64 mips mipsel powerpc)) > WITH_NUMA = --with-numactl > else > WITH_NUMA = --without-numactl > endif > ifneq (,$(findstring $(DEB_HOST_ARCH), ia64)) > WITH_LXC = --without-lxc > else > WITH_LXC = --with-lxc > endif > else > WITH_STORAGE_LVM = --without-storage-lvm > WITH_STORAGE_ISCSI = --without-storage-iscsi > WITH_STORAGE_DISK = --without-storage-disk > WITH_UDEV = --without-udev --with-hal > WITH_CAPNG = --without-capng > WITH_POLKIT = --without-polkit > * WITH_MACVTAP = --without-macvtap** > ** WITH_NETWORK = --without-network** > * WITH_QEMU = --without-qemu > WITH_LXC = --without-lxc > WITH_NUMA = --without-numactl > WITH_NETCF = --without-netcf > endif > > > I suppose that nothing has to be changed, correct? ... since the > _/then/_ branch already has the change mentioned and the _/else/_ > branch probably means that nothing related to networking would be > enabled anyway. > > Am I missing something ? Thoughts? Thanks a lot :) -- Richard Gomes http://rgomes.info http://www.linkedin.com/in/rgomes mobile: +44(77)9955-6813 inum <http://www.inum.net/>: +883(5100)0800-9804 sip:rgomes@ippi.fr

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[libvirt-users] intel quad gigabit nic and pci passthrough
by Ivan Kabaivanov 02 Feb '14

02 Feb '14

Hi all I have a very weird case of pci passthrough. I have a machine with 7 network interfaces, all of them intel. Four of them are on one quad giga ethernet device. If I manually unbind the devices and allow qemu to use them, with intel IOMMU working, everything works like a charm. Here's how I do it manually: root@kybrat (x86_64) ~]$ lspci -nn | grep net 00:19.0 Ethernet controller [0200]: Intel Corporation 82579V Gigabit Network Connection [8086:1503] (rev 06) 02:00.0 Ethernet controller [0200]: Intel Corporation 82572EI Gigabit Ethernet Controller (Copper) [8086:107d] (rev 06) 05:00.0 Ethernet controller [0200]: Intel Corporation 82571EB Gigabit Ethernet Controller [8086:10a4] (rev 06) 05:00.1 Ethernet controller [0200]: Intel Corporation 82571EB Gigabit Ethernet Controller [8086:10a4] (rev 06) 06:00.0 Ethernet controller [0200]: Intel Corporation 82571EB Gigabit Ethernet Controller [8086:10a4] (rev 06) 06:00.1 Ethernet controller [0200]: Intel Corporation 82571EB Gigabit Ethernet Controller [8086:10a4] (rev 06) 0c:00.0 Ethernet controller [0200]: Intel Corporation 82572EI Gigabit Ethernet Controller (Copper) [8086:107d] (rev 06) echo "8086 10a4" > /sys/bus/pci/drivers/pci-stub/new_id echo "8086 107d" > /sys/bus/pci/drivers/pci-stub/new_id echo "0000:05:00.0" > /sys/bus/pci/devices/0000\:05\:00.0/driver/unbind echo "0000:05:00.0" > /sys/bus/pci/drivers/pci-stub/bind echo "0000:05:00.1" > /sys/bus/pci/devices/0000\:05\:00.1/driver/unbind echo "0000:05:00.1" > /sys/bus/pci/drivers/pci-stub/bind echo "0000:06:00.0" > /sys/bus/pci/devices/0000\:06\:00.0/driver/unbind echo "0000:06:00.0" > /sys/bus/pci/drivers/pci-stub/bind echo "0000:06:00.1" > /sys/bus/pci/devices/0000\:06\:00.1/driver/unbind echo "0000:06:00.1" > /sys/bus/pci/drivers/pci-stub/bind echo "0000:0c:00.0" > /sys/bus/pci/devices/0000\:0c\:00.0/driver/unbind echo "0000:0c:00.0" > /sys/bus/pci/drivers/pci-stub/bind qemu-system-i386 -enable-kvm \ -m 2048 \ -cpu host \ -machine pc-q35-1.6 \ -drive file=/media/virtual/krym.qcow2,if=virtio \ -net none \ -device pci-assign,host=06:00.1,rombar=0 \ -device pci-assign,host=05:00.0,rombar=0 \ -device pci-assign,host=06:00.0,rombar=0 \ -device pci-assign,host=05:00.1,rombar=0 \ -device pci-assign,host=0c:00.0,rombar=0 \ -cdrom /media/virtual/asg-9.107-33.1.iso \ -boot c \ -vnc :0 \ -runas virtual \ -monitor unix:/media/virtual/control/krym/monitor,server,nowait \ -rtc base=localtime,clock=host,driftfix=none This starts qemu and pci passthrough works nicely. Now, if I try to do the same thing through libvirt, virt-install doesn't like the quad ethernet device pci passthrough and I get the error below: virt-install --name=krym --ram=2048 --vcpus=1 --cpu=host --import --os-type=linux --disk path=/media/virtual/krym.qcow2,format=qcow2,bus=virtio --nonetworks --graphics vnc,port=5900 --virt-type=kvm --machine=q35 --accelerate --host-device=pci_0000_06_00_1 --host-device=pci_0000_05_00_0 --host-device=pci_0000_06_00_0 --host-device=pci_0000_05_00_1 --host-device=pci_0000_0c_00_0 Starting install... ERROR Requested operation is not valid: PCI device 0000:06:00.1 is not assignable Domain installation does not appear to have been successful. If it was, you can restart your domain by running: virsh --connect qemu:///system start krym otherwise, please restart your installation. If I try to use just one NIC (any NIC, as long as it's not the quad NIC), things do work: virt-install --name=krym --ram=2048 --vcpus=1 --cpu=host --import --os-type=linux --disk path=/media/virtual/krym.qcow2,format=qcow2,bus=virtio --nonetworks --graphics vnc,port=5900 --virt-type=kvm --machine=q35 --accelerate --host-device=pci_0000_0c_00_0 Starting install... Creating domain... | 0 B 00:00:01 Cannot open display: Run 'virt-viewer --help' to see a full list of available command line options Domain creation completed. You can restart your domain by running: virsh --connect qemu:///system start krym So I guess libvirt has some problem with the intel quad NIC. I will appreciate any help. Thanks, IvanK.

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[libvirt-users] Libvirt Error Creating VMs for Nimbus Cloud
by Joshua McKee 01 Feb '14

01 Feb '14

Hello, I am having an issue with libvirt in my Nimbus cloud setup. When I use the Nimbus VM creation test scripts on a VMM node (using libvirt), the VM is created without a problem. However, when I attempt to create a new VM using Nimbus (which then tries to create the VM on the VMM node), I encounter the following error: --------------------------------------------------------------------------------------------------------------------------------------------- $ ./nimbus-cloud-client-022/bin/cloud-client.sh --run --name testimage --hours 1 Launching workspace. Workspace Factory Service: https://yellow:8443/wsrf/services/WorkspaceFactoryService Creating workspace "vm-035"... done. IP address: 172.29.99.20 Hostname: pub02 Start time: Fri Jan 31 13:48:57 MST 2014 Shutdown time: Fri Jan 31 14:48:57 MST 2014 Termination time: Fri Jan 31 14:50:57 MST 2014 Waiting for updates. Problem with vm-035: Unexpected issue STDERR: 2014-01-31 13:48:44,412 - WARNING - no qemu_img configuration, copy-on-write support is disabled libvir: QEMU error : Domain not found: no domain with matching name 'wrksp-33' libvir: error : An error occurred, but the cause is unknown 2014-01-31 13:48:45,587 - ERROR - Problem creating the VM: An error occurred, but the cause is unknown 2014-01-31 13:48:45,587 - ERROR - An error occurred, but the cause is unknown Traceback (most recent call last): File "/opt/nimbus/src/python/workspacecontrol/defaults/lvrt/lvrt_common.py", line 123, in create newvm = self._vmm().createXML(xml, 0) File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2189, in createXML if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self) libvirtError: An error occurred, but the cause is unknown 2014-01-31 13:48:45,589 - ERROR - Problem creating the VM: An error occurred, but the cause is unknown Traceback (most recent call last): File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 155, in _common_withnetsecurity _common_withtmplease(nic_set, kernel, local_file_set, c, netsecurity, platform, justprint) File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 174, in _common_withtmplease platform.create(local_file_set, nic_set, kernel) File "/opt/nimbus/src/python/workspacecontrol/defaults/lvrt/lvrt_common.py", line 128, in create raise UnexpectedError(shorterr) UnexpectedError: Problem creating the VM: An error occurred, but the cause is unknown 2014-01-31 13:48:45,589 - ERROR - Creation problem: going to back out tmp space lease 2014-01-31 13:48:45,589 - ERROR - Backed out tmp space lease 2014-01-31 13:48:45,589 - ERROR - Problem creating the VM: An error occurred, but the cause is unknown Traceback (most recent call last): File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 137, in _common_withnetbootstrap _common_withnetsecurity(vm_name, nic_set, kernel, local_file_set, p, c, netsecurity, platform, justprint) File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 164, in _common_withnetsecurity raise e UnexpectedError: Problem creating the VM: An error occurred, but the cause is unknown 2014-01-31 13:48:45,589 - ERROR - Creation problem: going to back out net security 2014-01-31 13:48:45,606 - ERROR - Backed out net security 2014-01-31 13:48:45,606 - ERROR - Problem creating the VM: An error occurred, but the cause is unknown Traceback (most recent call last): File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 119, in _common_withnics _common_withnetbootstrap(vm_name, nic_set, kernel, local_file_set, p, c, netsecurity, platform, justprint) File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 146, in _common_withnetbootstrap raise e UnexpectedError: Problem creating the VM: An error occurred, but the cause is unknown 2014-01-31 13:48:45,607 - ERROR - Creation problem: going to back out net bootstrap 2014-01-31 13:48:45,607 - ERROR - Backed out net bootstrap 2014-01-31 13:48:45,607 - ERROR - Problem creating the VM: An error occurred, but the cause is unknown Traceback (most recent call last): File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 96, in _common _common_withnics(vm_name, nic_set, kernel, local_file_set, p, c, localnet, netbootstrap, netsecurity, platform, justprint) File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 128, in _common_withnics raise e UnexpectedError: Problem creating the VM: An error occurred, but the cause is unknown 2014-01-31 13:48:45,607 - ERROR - Creation problem: going to back out net leases 2014-01-31 13:48:45,607 - ERROR - Backed out net leases 2014-01-31 13:48:45,608 - ERROR - Problem creating the VM: An error occurred, but the cause is unknown Traceback (most recent call last): File "/opt/nimbus/src/python/workspacecontrol/main/wc_core.py", line 79, in core _core(vm_name, action, p, c) File "/opt/nimbus/src/python/workspacecontrol/main/wc_core.py", line 168, in _core wc_core_creation.create(vm_name, p, c, async, editing, images, kernels, localnet, netbootstrap, netlease, netsecurity, persistence, platform) File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 16, in create _create_local(vm_name, p, c, async, editing, images, kernels, localnet, netbootstrap, netlease, netsecurity, persistence, platform) File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 31, in _create_local _common(local_file_set, vm_name, p, c, editing, kernels, localnet, netbootstrap, netlease, netsecurity, persistence, platform, justprint=justprint) File "/opt/nimbus/src/python/workspacecontrol/main/wc_core_creation.py", line 107, in _common raise e UnexpectedError: Problem creating the VM: An error occurred, but the cause is unknown Problem executing: Problem creating the VM: An error occurred, but the cause is unknown Exiting with error code: 4 Workspace "vm-035" did NOT reach target state "Running" Problem running 'vm-035'. --------------------------------------------------------------------------------------------------------------------------------------------- I checked /var/log/libvirtd.log, and found the following: --------------------------------------------------------------------------------------------------------------------------------------------- 2014-01-31 20:48:39.311+0000: 2888: info : libvirt version: 0.9.8 2014-01-31 20:48:39.311+0000: 2888: error : virNetSocketReadWire:1006 : End of file while reading data: Input/output error --------------------------------------------------------------------------------------------------------------------------------------------- I don't know if this is relevant, but I also noticed this warning when creating the VM through the test scripts mentioned above: --------------------------------------------------------------------------------------------------------------------------------------------- 2014-01-31 05:41:44.018+0000: 1351: warning : qemuDomainObjTaint:1134 : Domain id=1 name='control-test' uuid=95f2d398-6b98-5359-7597-b0f596aae996 is tainted: high-privileges --------------------------------------------------------------------------------------------------------------------------------------------- I assumed this was a permissions issue, but I double checked and everything seems in order. I did not have this issue on my previous Nimbus cloud setup. Thanks, Josh

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[libvirt-users] Looks like blockpull does not accept a subset of the entire chain of backing files
by Richard Gomes 01 Feb '14

01 Feb '14

Hello If I'm not terribly mistaken, looks like libvirt 1.2.1 does not provide ability of merging only a subset of the entire chain of backing files. So, if I have a chain like this: root <- a <-b <- c <- d <- active ... and I'd like to obtain a chain like this: root <- c <- d <- active ... looks like it's not supported, since I'm trying the command / //virsh blockpull domain --path /path/to/c --bandwidth 30 --base /path/to/root// (1) / ... but it complains because /--path /path/to/c/ is not recognized, since only /--path /path/to/active/ is acceptable: / //virsh blockpull domain --path /path/to/active --bandwidth 30 --base /path/to/root// (2) / So, command (1) fails but command (2) succeeds. The point is: How could I obtain the results I'm trying to achieve via command (1) ? I'm new to libvirt, but the article below made me think that what I'm trying to do would be possible: http://kashyapc.fedorapeople.org/virt/lc-2012/snapshots-handout.html ( see section on /blockpull/ ) Thoughts? For your information, my environment is: Compiled against library: libvirt 1.2.1 Using library: libvirt 1.2.1 Using API: QEMU 1.2.1 Running hypervisor: QEMU 1.7.0 Running against daemon: 1.2.1 Thanks -- Richard Gomes http://rgomes.info http://www.linkedin.com/in/rgomes mobile: +44(77)9955-6813 inum <http://www.inum.net/>: +883(5100)0800-9804 sip:rgomes@ippi.fr

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[libvirt-users] Dynamically setting permanent memory libvirt-lxc
by mallu mallu 01 Feb '14

01 Feb '14

I'm trying to permanently change memory allocation for a libvirt-lxc domain. So far I tried changing memory in memory.limit_in_bytes under /cgroup/memory/libvirt/lxc/<container>/. This didn't help. It appears that libvirt is not reading changes in cgroup. My requirements are 1) Be able to dynamically change memory of a LXC domain without reboot 2) The memory change must survive LXC domain reboot. Any help would be greatly appreciated

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[libvirt-users] libvirt-sandbox question.
by Christopher Stone 30 Jan '14

30 Jan '14

I hope this question isn't considered too off topic for this list, I am trying to reach the libvirt-sandbox developers, but I could not find a libvirt-sandbox specific mailing list, and it seemed to me that libvirt-sandbox was a part of libvirt itself. I am trying to port libvirt-sandbox to run on a CentOS 6.5 system. This wasn't too hard but, I had to do the following: I have used the CentOS repo addon ElRepo to upgrade the kernel to 3.10.28. CentOS normally runs a 2.6.32 kernel. I upgraded glib2 from 2.36 to 2.38.2. I did this by building 2.38.2 from source and installing it into /usr/local. Thus, the 2.36 version still exists in /lib64 and the normal CentOS applications use this version. I built libvirt 1.2.1 from source and installed it into /usr/local. I used: ./configure --with-lxc --with-selinux --with-secdriver-selinux --prefix=/usr/local I built libvirt-glib 0.1.7 from source and installed it into /usr/local. I used: PKG_CONFIG_PATH=/usr/local/lib/pkgconfig ./configure --prefix=/usr/local I build libvirt-sandbox 0.5.1 from source and installed it into /usr/local. I used: PKG_CONFIG_PATH=/usr/local/lib/pkgconfig ./configure As a test, I am able to run the libvirt lxc helloworld example: [root@scwnet1 lxc_helloworld]# virsh -c lxc:/// define helloworld.xml Domain helloworld defined from helloworld.xml [root@scwnet1 lxc_helloworld]# virsh -c lxc:/// start helloworld Domain helloworld started [root@scwnet1 lxc_helloworld]# virsh -c lxc:/// list Id Name State ---------------------------------------------------- 9819 helloworld running [root@scwnet1 lxc_helloworld]# virsh -c lxc:/// console helloworld Connected to domain helloworld Escape character is ^] sh-4.1# exit exit Next, I try to use libvirt-sandbox, and I get the following error: [root@scwnet1 tests]# /usr/local/bin/virt-sandbox -c lxc:/// /bin/sh Unable to start sandbox: Failed to create domain: unsupported configuration: Unable to find security driver for label selinux My libvirt config.log shows the SELinux security driver as yes: configure:71172: Configuration summary configure:71174: ===================== configure:71176: configure:71178: Drivers configure:71180: configure:71182: Xen: no configure:71184: QEMU: yes configure:71186: UML: yes configure:71188: OpenVZ: yes configure:71190: VMware: yes configure:71192: VBox: yes configure:71194: XenAPI: no configure:71196: xenlight: no configure:71198: LXC: yes configure:71200: PHYP: no configure:71202: ESX: yes configure:71204: Hyper-V: no configure:71206: Parallels: yes configure:71208: Test: yes configure:71210: Remote: yes configure:71212: Network: yes configure:71214: Libvirtd: yes configure:71216: Interface: yes configure:71218: macvtap: yes configure:71220: virtport: yes configure:71222: configure:71224: Storage Drivers configure:71226: configure:71228: Dir: yes configure:71230: FS: yes configure:71232: NetFS: yes configure:71234: LVM: yes configure:71236: iSCSI: yes configure:71238: SCSI: yes configure:71240: mpath: yes configure:71242: Disk: yes configure:71244: RBD: no configure:71246: Sheepdog: no configure:71248: Gluster: no configure:71250: configure:71252: Security Drivers configure:71254: configure:71256: SELinux: yes (/sys/fs/selinux) configure:71258: AppArmor: no (install profiles: no) configure:71260: configure:71262: Driver Loadable Modules configure:71264: configure:71267: dlopen: -ldl configure:71273: configure:71275: Libraries configure:71277: configure:71296: apparmor: no configure:71326: attr: yes (CFLAGS='' LIBS='-lattr') configure:71356: audit: yes (CFLAGS='' LIBS='-laudit') configure:71386: avahi: yes (CFLAGS='-D_REENTRANT ' LIBS='-lavahi-common -lavahi-client ') configure:71416: blkid: yes (CFLAGS='-I/usr/include/blkid -I/usr/include/uuid ' LIBS='-lblkid ') configure:71446: capng: yes (CFLAGS='' LIBS='-lcap-ng') configure:71476: curl: yes (CFLAGS='-DCURL_DISABLE_TYPECHECK ' LIBS='-lcurl ') configure:71506: dbus: no configure:71536: fuse: no configure:71566: glusterfs: no configure:71596: hal: no configure:71626: netcf: yes (CFLAGS=' ' LIBS='-lnetcf ') configure:71656: numactl: yes (CFLAGS='' LIBS='-lnuma') configure:71686: openwsman: no configure:71716: pciaccess: yes (CFLAGS=' ' LIBS='-lpciaccess ') configure:71746: readline: yes (CFLAGS='' LIBS='-lreadline') configure:71776: sanlock: yes (CFLAGS='' LIBS='-lsanlock_client') configure:71806: sasl: yes (CFLAGS='' LIBS='-lsasl2') configure:71836: selinux: yes (CFLAGS='' LIBS='-lselinux') configure:71866: ssh2: no configure:71897: udev: yes (CFLAGS=' ' LIBS='-ludev ') configure:71927: yajl: yes (CFLAGS='' LIBS='-lyajl') configure:71940: libxml: -I/usr/include/libxml2 -lxml2 configure:71942: dlopen: -ldl configure:71948: openwsman: no configure:71952: gnutls: -DGCRYPT_NO_DEPRECATED -lgnutls -lgcrypt configure:71958: firewalld: no configure:71965: polkit: /usr/bin/pkcheck (version 1) configure:71976: xen: no configure:71983: xenapi: no configure:71990: xenlight: no configure:71994: pcap: -lpcap configure:72001: nl: -lnl configure:72011: mscom: no configure:72015: xdr: configure:72025: rbd: no configure:72029: configure:72031: Test suite configure:72033: configure:72035: Coverage: no configure:72037: Alloc OOM: no configure:72039: configure:72041: Miscellaneous configure:72043: configure:72045: Debug: yes configure:72047: Use -Werror: no My libvirt capabilites shows this: [root@scwnet1 tests]# virsh -c lxc:/// capabilities <capabilities> <host> <uuid>20b4e77c-3fb8-dc11-968d-c8600070189e</uuid> <cpu> <arch>x86_64</arch> </cpu> <power_management> <suspend_mem/> <suspend_disk/> </power_management> <topology> <cells num='1'> <cell id='0'> <memory unit='KiB'>8334880</memory> <cpus num='4'> <cpu id='0' socket_id='0' core_id='0' siblings='0-1'/> <cpu id='1' socket_id='0' core_id='1' siblings='0-1'/> <cpu id='2' socket_id='0' core_id='2' siblings='2-3'/> <cpu id='3' socket_id='0' core_id='3' siblings='2-3'/> </cpus> </cell> </cells> </topology> <secmodel> <model>none</model> <doi>0</doi> </secmodel> </host> <guest> <os_type>exe</os_type> <arch name='x86_64'> <wordsize>64</wordsize> <emulator>/usr/local/libexec/libvirt_lxc</emulator> <domain type='lxc'> </domain> </arch> </guest> <guest> <os_type>exe</os_type> <arch name='i686'> <wordsize>32</wordsize> <emulator>/usr/local/libexec/libvirt_lxc</emulator> <domain type='lxc'> </domain> </arch> </guest> </capabilities> I am not sure if secmodel none is the problem. Can someone give me some direction on how to fix this? Cheers, Chris.

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[libvirt-users] dropping capabilities in lxc containers
by Thierry Parmentelat 29 Jan '14

29 Jan '14

Hi there I’m not quite proficient with libvirt yet, and have been using it so far primarily to manage lxc containers I was hoping to find a means to configure the set of capabilities that guests should drop, but came across a few web pages suggesting these were set in stone in the code is this correct, or is there a means to tweak this set from the host via the xml config or a virsh command ? any hint / pointer to documentation in this respect would be most appreciated — Thierry

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[libvirt-users] Libvirt-LXC + systemd + user namespace
by Jan Olszak 29 Jan '14

29 Jan '14

Hi there! I am trying to turn on user namespace by adding following lines to the config: <idmap> <uid start='0' target='0' count='100000'/> <gid start='0' target='0' count='100000'/> </idmap> As you can see the root in container is mapped to the root outside. I was expected to see no difference after adding this lines, but unfortunately there are some (see details below). Am I missing something or is there a problem with system, libvirt or kernel? Full libvirt config: <domain type='lxc'> <name>test_with_idmap</name> <memory>102400</memory> <os> <type>exe</type> <init>/usr/lib/systemd/systemd</init> </os> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <idmap> <uid start='0' target='0' count='100000'/> <gid start='0' target='0' count='100000'/> </idmap> <devices> <console type='pty'/> <filesystem type='mount'> <source dir='/guest'/> <target dir='/'/> </filesystem> </devices> </domain> root:~> uname -a Linux localhost 3.10.19-01077-g4a19d28-dirty #5 SMP PREEMPT Mon Jan 13 12:56:09 CET 2014 armv7l GNU/Linux root:~> libvirtd --version libvirtd (libvirt) 1.2.1 root:~> systemd --version systemd 204 After adding idmap to config systemd can't start many of its services, in particular: Failed to mount Debug File System. Failed to mount Configuration File System. Failed to mount FUSE Control File System. Failed to start udev Kernel Device Manager. Failed to start Remount Root and Kernel File Systems. Failed to start Journal Service. systemctl status says: ExecMount=/bin/mount debugfs /sys/kernel/debug -t debugfs (code=exited, status=32) ExecMount=/bin/mount configfs /sys/kernel/config -t configfs (code=exited, status=32) ExecMount=/bin/mount fusectl /sys/fs/fuse/connections -t fusectl (code=exited, status=32) ExecStart=/usr/lib/systemd/systemd-udevd (code=exited,status=206/OOM_ADJUST) ExecStart=/usr/lib/systemd/systemd-remount-fs (code=exited,status=1/FAILURE) ExecStart=/usr/lib/systemd/systemd-journald (code=exited, status=218/CAPABILITIES) Thanks!

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Re: [libvirt-users] How to find domain os type and ip address
by Rathidevi 29 Jan '14

29 Jan '14

Hi All, I am using the libvirt-0.5.1.jar and downloaded from this link ftp://libvirt.org/libvirt/java. 1) To find the os type of domain I use this method getOSType(). But it returns the kvm or hvm instead of windows and linux. Is the any way to find the original os type of domain? 2) Please give is there any option or method available to find the ipaddress of domain? Thanks & Regards Rathidevi

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[libvirt-users] Does libvirt support attach volume to linux container now?
by Du Jun 29 Jan '14

29 Jan '14

Hi all, I am playing with linux container and using libvirt to manage linux container. I find I fail to attach volume to linux container via libvirt and I got the following error message: Failed to attach volume: data-111 to VM: lxc-111; org.libvirt.LibvirtException: unsupported configuration: Can't setup disk for non-block device. My question is that does libvirt support attaching volume to linux container? If it supports, what version should I use? Thanks, DuJun

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[libvirt-users] Problems with pmsuspend/wakeup
by Alex 27 Jan '14

27 Jan '14

Hi, I've migrated a Windows7 vm from F17 to F20 and it appears to be working okay. Apparently when it's left idle for some period, it automatically goes into a pmsuspend state, and I'm unable to wake it. I've figured out the virsh dompmwakeup command, which then virsh shows it's running, but the vm is still unresponsive. It doesn't respond to ping and the display is just black when accessing it through virt-manager. Is there something I need to do in the guest for it to wake up properly? How can I just prevent it from ever suspending in the first place? Thanks, Alex

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[libvirt-users] Libvirt support for VEB
by Padmanabhan Krishnan 24 Jan '14

24 Jan '14

Hello, I have a setup of virtual machines and wherein my virtual switch (OVS) takes care of switching locally and it uses the network for talking to VM's outside the server (like a VEB scenario I guess). I want Netlink messages to be sent to LLDPAD. I understand that i had to modify the XML files and start the VM. But, i see from the XML that it supports only VEPA, not VEB. But, irrespective of VEB or VEPA, those VM information should be known to the upstream switch through VDP. 802.1QBG seem to support this (both VEPA and VEB) http://www.ieee802.org/1/files/private/bg-drafts/d2/802-1qbg-d2-2.pdf But, for VEB, no net link messages are sent by libvirt. Why is that? From the XML example, I see that: <interface type=’direct’> <mac address=’d0:0f:d0:0f:02:01’/> <source dev=’eth2.20’ mode=’vepa’/> <source network=’default’/> <virtualport type=’802.1Qbg’> <parameters managerid=’12’ typeid=’0x123456’ typeidversion=’1’ instanceid=’09b00c53-8b5c-4eeb-8f00-d847aa05191b’ /> </virtualport> I tried different combinations by changing the interface type to bridge and and trying Qbg as in below, I find that it doesn't send a Netlink message to LLDPAD. There's no "mode=veb". </controller> <interface type='bridge'> <mac address='00:54:00:4e:46:04'/> <source bridge='xml_br'/> <virtualport type='802.1Qbg'> <parameters managerid='12' typeid='1193046' typeidversion='1' instanceid='09b00c53-8b5c-4eeb-8f00-d847aa05191b'/> </virtualport> <target dev='tap_xml'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> How do i get this to work? Is this a limitation? Thanks, KP

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Re: [libvirt-users] PCI Passthrough
by The PowerTool 24 Jan '14

24 Jan '14

Oops! I blame Microsoft. I use Hotmail and am very, very unhappy that MS bought them out which leaves me stuck with Outlook, which sucks. I've always just hit reply in the past and it's worked. Now I'm going to have to be careful to make sure my replies go where I expect them. Thank you very much for the information. I was really hoping to consolidate systems but that apparently won't happen in the near future. So that means I'll be focusing my efforts on getting my Spacewalk server updated and then upgrading from F18 to F20 or 21. Yep, I was very aware of F18 dropping and thankful for the one brief delay. I'll be taking a look at it again once I upgrade to the current Fedora. If that doesn't work I'll wait and keep an eye on posts and when things look better probably get new hardware (which will likely be the requirement). Thanks, again! Date: Thu, 23 Jan 2014 11:37:02 +0200 From: laine(a)laine.org To: thepowertool_sc(a)hotmail.com Subject: Re: [libvirt-users] PCI Passthrough On 01/21/2014 05:32 PM, The PowerTool wrote: Laine, Thank you very much for your response. I took a look at the first link you provide (archlinux). Key items that caught my attention (in order): 1. "Intel IGDs won't work"--I have Intel integrated video 2. "NOTE: THIS IS EXPERIMENTAL SO IT MIGHT NOT WORK FOR YOU" (self-explanatory) One additional note: When I received the "permission denied" error I had the same thought as you. I was unaware of the issue you outlined with libvirt needing to be configured to run as root on some versions of Fedora. Still, as root I did successfully detach my video card... at least that's how it appeared given the monitor went no-signal and then displayed a strange pattern. The system wouldn't ping and failed to respond to ssh attempts. I had to reboot to recover. I tried a second experiment where I first started a ssh session and then detached (from the host). Going back to the 2nd system the ssh session stopped responding. Actually that's probably more of an indication that your kernel just doesn't properly handle having the primary video device disappear midstream. You may have different results if you connected two video cards to a system, and tried to passthrough the secondary (it still probably wouldn't work, but it would likely fail in a different way). That leads me to believe it's not fully baked, something critically fails, and it's not going to work for me at-least at my current levels. Alex Williamson gave a talk at this year's KVM Forum (in October) about the difficulties of making VGA passthrough work, and it was truly frightening; there are just too many strange, undocumented backdoors in the devices that are required by the drivers for proper operation. In my mind this whole area just has too great of a likelihood of total failure without possibility of making it work in a reasonable time frame. To answer your question: I'm running Fedora 18. F18 was definitely one of the releases that was broken wrt PCI passthrough requiring qemu to be run as root. I don't recall if the kernel guys ever fixed it in that version or not. I pestered them about it for months, then finally gave up. BTW, you know that F18 has just gone end-of-life, right? This means no more updates of any type, even security updates. You can actually upgrade your F18 machine to F19, and F19 to F20, using the "fedup" package (I haven't tried using fedup to go directly from F18 to F20, but I suppose you could look into it). *A lot* has changed in virtualization in the last year, and as a bonus, you'll be covered for security fixes for another year. Is there a place where I can follow updates and see PCI pass-through mature so I'll know when next to try? Well, you could try the qemu-devel mailing list, but it's pretty high traffic, and very few of the messages would be on this particular topic. That *is* the place where any discussion would take place, though. Thank you, again, for your help! BTW, it's best to keep all messages on the list rather than private replies. That way someone else with better information may reply (and people very often get busy and disappear for several days/weeks at a time, so it's better to not rely on a response from a single person)

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[libvirt-users] Newbie question about network setup
by hubert depesz lubaczewski 23 Jan '14

23 Jan '14

Hi, I've read some docs, and have some ideas, but before I'll go any further, I'd like to get confirmation if I'm understanding it right. Let's assume that on my host I want to have 5 different guests, but they shouldn't be able to communicate with each other. Is the solution to it addition of 5 separate "networks" in libvirt, and then connecting each guest to its own "network"? Looks sensible, but perhaps I'm overlooking something. Best regards, depesz -- The best thing about modern society is how easy it is to avoid contact with it. http://depesz.com/

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[libvirt-users] Using Java bindings to event callback
by Howie 23 Jan '14

23 Jan '14

Hi My test environment : CentOS 6.3 6.4 Ubuntu 13.10 For CentOS 6.4 libvirt-java-0.4.9-1.el6.noarch libvirt-python-0.10.2-29.el6.x86_64 libvirt-client-0.10.2-29.el6.x86_64 libvirt-0.10.2-29.el6.x86_64 I am try to use java bindings to event callback. int register = conn.domainEventRegisterAny(null, 0, cb); But always get the following error message: libvirt: Remote Driver error : adding cb to list exception caught:org.libvirt.LibvirtException: adding cb to list level:VIR_ERR_ERROR code:VIR_ERR_RPC domain:VIR_FROM_REMOTE hasConn:false hasDom:false hasNet:false message:adding cb to list str1:%s str2:adding cb to list str3:null int1:-1 int2:-1 By the way I also trace the mail list *[libvirt] [PATCH] Java bindings for domain events* (2008 Nov 07) *[libvirt] [PATCH 1/2] Java bindings for domain events**[libvirt] [PATCH 2/2] Java bindings for domain events* (2008 Nov 18) --> Reject patch*Re: [libvirt] [PATCH 1/2] Java bindings for domain events* (2008 Dec) —>No Result*[libvirt-users] Using Java bindings to event callback * (2010 Jul) —>No Result *[libvirt] [PATCH 0/2] Libvirt-java event handling (2011Jul)* —> I think most drivers don't support that. We have a custom driver for our hypervisor and it works. *[libvirt] [libvirt-java] [PATCH 00/12] event support* (2013 Jan) —> *Re: [libvirt] [libvirt-java] [PATCH 00/12] event support (2013 Mar)* --> No Result Any suggestions? Thanks, Howie

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[libvirt-users] running LXC hello world example
by Jacob Everist 23 Jan '14

23 Jan '14

Hello, I am having difficulty getting any sort of LXC container running. I am trying to use the following tutorial to run the hello world example: https://www.berrange.com/posts/2011/09/27/getting-started-with-lxc-using-li… Here are the results of my running the tutorial: [root@terraria ~]# virsh list Id Name State ---------------------------------------------------- [root@terraria ~]# virsh uri lxc:/// [root@terraria ~]# cat helloworld.xml <domain type='lxc'> <name>helloworld</name> <memory>102400</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <devices> <console type='pty'/> </devices> </domain> [root@terraria ~]# virsh define helloworld.xml Domain helloworld defined from helloworld.xml [root@terraria ~]# virsh start helloworld error: Failed to start domain helloworld error: internal error guest failed to start: PATH=/bin:/sbin TERM=linux container=lxc-libvirt container_uuid=791640de-95a9-082c-7292-c55106bcdca9 LIBVIRT_LXC_UUID=791640de-95a9-082c-7292-c55106bcdca9 LIBVIRT_LXC_NAME=helloworld /bin/sh error receiving signal from container: Input/output error --- As you can see, I am getting an error. How do I go about diagnosing this error? This is a fresh install so the only thing I have been using this machine for is for LXC/libvirt testing. -- Jacob Everist cell: 310-425-9732 email: jacob.everist(a)gmail.com

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[libvirt-users] LXC configuration for Systemd in the user namespace.
by Jan Olszak 23 Jan '14

23 Jan '14

Hi there! Does anyone have a config file for libvirt-LXC, that makes it possible to: 1. Use all namespaces (user namespace in particular) 2. Run systemd inside a container. Thanks! Jan

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[libvirt-users] If it's possible for a third-party PCIe card to be shared by multiple containers
by WANG Cheng D 23 Jan '14

23 Jan '14

Dear all, I have a thirty-party PCIe card in my host which can work properly in native mode. I wonder if this card can be shared by multiple containers. As far as the network interface is concerned, too many efforts have been made for it. Two dedicated cgroup resource schedulers/subsystem(net_cls, net_prio) have been provided at the kernel level, and libvirt has also done a lot of work on virtual networking to enable network interface sharing between containers. As it's difficult for me to implement all these things that have been done for network interface, I should find other way to enable sharing of this card. Do you have any idea? Any comments will be high appreciated. Cheng Wang

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[libvirt-users] How to change virtfs/9p/v9fs umask
by Javi Legido 23 Jan '14

23 Jan '14

Hi there. My question is regarding virtfs/9p/v9fs [1], not sure what's the appropiate name :) Basically I have a KVM + libvirt server sharing a directory with a guest in mapped mode. It works fine, but the only issue is with the file permissions of the files created by the guest inside the host: -They are 0700 for dirs and 0400 for files -The files belongs to the same user that runs the "qemu-system-x86_64" process, which is "libvirt-qemu" Questions: 1. There's a way to change the umask of this user (I'm almost sure that I already tried this and it didn't worked) or to change any setting to force the permissions to be wider? 2. It's acceptable to run the "qemu-system-x86_64" as root, and switch to "passthrough" mode? Below some details of my environment. ==== Host ==== $ uname -r 3.12-1-amd64 $ cat /etc/issue Debian GNU/Linux jessie/sid \n \l $ sudo dpkg -l | grep libvirt ii libvirt-bin 1.2.0-2 amd64 programs for the libvirt library ii libvirt0 1.2.0-2 amd64 library for interfacing with different virtualization systems ii python-libvirt 1.2.0-2 amd64 libvirt Python bindings $ ps ax | grep vm_name 23307 ? Sl 0:40 qemu-system-x86_64 -enable-kvm -name vm_name -S -machine pc-1.1,accel=kvm,usb=off -cpu core2duo,+lahf_lm,+pdcm,+xtpr,+cx16,+tm2,+est,+smx,+vmx,+ds_cpl,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds -m 1024 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid 2387f160-ffa2-3463-1aa3-771594779df3 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/vm_name.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/dev/vg/lv_vm_name,if=none,id=drive-virtio-disk0,format=raw,cache=none -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -fsdev local,security_model=mapped,id=fsdev-fs0,path=/srv/share -device virtio-9p-pci,id=fs0,fsdev=fsdev-fs0,mount_tag=virtfs_share,bus=pci.0,addr=0x3 -netdev tap,fd=28,id=hostnet0,vhost=on,vhostfd=29 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:68:90:d8,bus=pci.0,addr=0x4 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 Guest XML snippet: <filesystem type='mount' accessmode='mapped'> <source dir='/srv/share/> <target dir='virtfs_share'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </filesystem> Thanks. Javier [1] http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/plain/Docume…

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[libvirt-users] PCI Passthrough
by The PowerTool 21 Jan '14

21 Jan '14

I'm trying to pass-through my VGA card to a guest session. I found: http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM - which is very frustrating because there's no date on the documentation. I suspect it's old. It does clearly say that you must have VT-d support for pci pass-through. It then goes on to say "Some work towards allowing this ["software pass-through"] were done, but the code never made it into KVM". If this is old is there now support for PCI pass-through on hardware that doesn't support VT-d? I have a HP p7-1456c which has: Intel Core i5-3330 Processor (VT-x=yes, VT-d=yes) http://ark.intel.com/products/65509/Intel-Core-i5-3330-Processor-6M-Cache-u… on a MB: H-Joshua-H61-UATX (with specs that say *nothing* about virtualization) http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c03135925#N… and the H-Joshua-H61-UATX uses the Intel H61 Express Chipset (VT-d=No) http://ark.intel.com/products/52806/Intel-BD82H61-PCH?q=intel%20h61%20expre… On the KVM how to assign devices page it provides a way to verify IOMMU support on Intel: ]# dmesg | grep -e DMAR -e IOMMU [ 0.000000] ACPI: DMAR 00000000d8d29460 000B0 (v01 HPQOEM SLIC-CPC 00000001 INTL 00000001) [ 0.023074] dmar: IOMMU 0: reg_base_addr fed90000 ver 1:0 cap c0000020e60262 ecap f0101a [ 0.023078] dmar: IOMMU 1: reg_base_addr fed91000 ver 1:0 cap c9008020660262 ecap f0105a [ 0.023151] IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1 Does this mean I do have VT-d/IOMMU support??? I attempted to follow the basic instructions to pass through my VGA card: ]$ lspci -nn | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0152] (rev 09) Then added to my domain definition: <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </hostdev> With that added code I consistently get "Connection to guest failed" messages and the guest fails to start. /var/log/libvirt/qemu is empty. No log. So my 1st question is can I do this given my hardware? If the answer is "yes" then this is where I'm stuck. Additionally, I tried: ]$ virsh nodedev-detach pci_0000_00_02_0 error: Failed to detach device pci_0000_00_02_0 error: Failed to add PCI device ID '8086 0152' to pci-stub: Permission denied My thinking was simply to verify if I could manually detach the device. I couldn't find a reference searching for this error. Any help would be greatly appreciated! Thank you!

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[libvirt-users] Will virsh command setvcpus/vcpupin be supported by lxc driver in the future?
by WANG Cheng D 21 Jan '14

21 Jan '14

Dear member of libvirt team, I hope the lxc could be dynamically reconfigured, such as the number of vcpu or vcpu pinning. According to http://libvirt.org/hvsupport.html , at present, setvcpus(virDomainSetVcpus) and vcpupin (virDomainGetVcpuPinInfo) are not supported by lxc driver. I wonder if these commands will be supported by libvirt in the future? Best wishes, Cheng Wang

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[libvirt-users] Yet another disk I/O performance issue
by Matteo Lanati 21 Jan '14

21 Jan '14

Hi all, I'm running a VM using libvirt+KVM and I have a disk performance issue. The host is the following: 4 cores Intel Xeon 5140(a)2.33 GHz, 16 GB of RAM, SATA HDD, OS Debian Wheezy, libvirt 0.9.12-11, QEMU-KVM 1.1.2+dfsg-2. The guest: 1 CPU, 2 GB RAM running Debian 7.0, image in compressed qcow2 format. When I try do run "dd if=/dev/zero of=io.test bs=32768k count=40" I get around 500 MB/s on bare metal, while only around 30 MB/s inside the VM. I'm trying to get something more out of the virtualization layer, I hope that there's room for improvement. I'm using virtio, I aready set cache='none' and io='native' in the domain definition. Both host and guest are using deadline as I/O scheduler. The VM uses an ext4 filesystem, while the image is saved on an ext3 disk. I mounted the host and guest filesystems specifying nodiratime and noatime options. Even if I convert the image to raw format nothing changes. I didn't mess with iotune nor blockio. Is there something that I overlooked or any other suggestion? Thanks in advance for your help. Matteo -- A refund for defective software might be nice, except it would bankrupt the entire software industry in the first year. Andrew S. Tanenbaum, Computer Networks, 2003, Introduction, page 14 Linux registered user #463400

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[libvirt-users] Retry reboots in xmls files for libvirt
by Fernando Porro 21 Jan '14

21 Jan '14

Hi, I have a virtual machine defined by xml that start from pxe (network boot), my problem is that sometimes the dhcp server is not ready when the virtual machine try to boot. I need that the virtual machine keep asking for dhcp (network reboot) many times, until dhcp is ready and can start the virtual machine with a valid ip. How can I configure that in the xml file? BR //Fernando

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