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[libvirt-users] virt-manager can't start
by Stephen Liu 05 Feb '10

05 Feb '10

Hi folks, KVM Virt-manager host - Debian 5.0 Starting; Gnome Applications -> System Tools - Virtual Machine Manager popup following error; Traceback (most recent call last): File "/usr/share/virt-manager/virt-manager.py", line 346, in <module> main() File "/usr/share/virt-manager/virt-manager.py", line 248, in main setup_logging() File "/usr/share/virt-manager/virt-manager.py", line 124, in setup_logging os.mkdir(vm_dir) OSError: [Errno 17] File exists: '/home/satimis/.virt-manager' - end - $ ls -al /home/satimis/ | grep virt-manager drwxr-xr-x 2 root root 4096 2009-05-31 06:11 .virt-manager $ mv /home/satimis/.virt-manager /home/satimis/.virt-manager.old01 Restart Applications -> System Tools - Virtual Machine Manager starting GUI virt-manager but without asking for login as root $ ls -al /home/satimis/ | grep virt-manager drwxr-xr-x 2 satimis satimis 4096 2010-01-31 10:00 .virt-manager If changing the owner by running $ sudo chown root:root /home/satimis/.virt-manager GUI virt-manage can't start with abovementioned warning pop. Please advise how to fix this problem. I expect with root-password to start GUI virt-manager TIA B.R. Stephen L Send instant messages to your online friends http://uk.messenger.yahoo.com

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[libvirt-users] No sound
by Stephen Liu 04 Feb '10

04 Feb '10

Hi folks, Host - Debian 5.0 KVM VM - Ubuntu 9.10 No sound on playing youtube. Volume on host and VM has been turned to max, Virtual Machine Manager Edit -> Preferences Install Audio Device [check] Local VM Please help. TIA B.R. Stephen L Send instant messages to your online friends http://uk.messenger.yahoo.com

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[libvirt-users] Problem creating VM: "tap: not a valid disk type"
by Arik Raffael Funke 03 Feb '10

03 Feb '10

Hi, I am having problems creating VMs in virt-manager. I have played with different xen hypervisor versions 3.0 & 3.4 (with rpm -i --force) but have in principle gone back to the originals. - Though I cannot absolutely exclude that something has gone wrong. In principle I am using rhel 5.4 with the gitco xen 3.4 hypervisor. Can anybody put me on the right track with the attached error message? Note, the storage file I am attempting to use does exist. Many thanks, Arik === Unable to complete install 'libvirt.libvirtError POST operation failed: xend_post: error from xen daemon: (xend.err 'Error creating domain: Invalid Configuration: tap: not a valid disk type') Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/create.py", line 1485, in do_install dom = guest.start_install(False, meter = meter) File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 628, in start_install return self._do_install(consolecb, meter, removeOld, wait) File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 726, in _do_install self.domain = self.conn.createLinux(install_xml, 0) File "/usr/lib64/python2.4/site-packages/libvirt.py", line 1077, in createLinux if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self) libvirtError: POST operation failed: xend_post: error from xen daemon: (xend.err 'Error creating domain: Invalid Configuration: tap: not a valid disk type') '

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[libvirt-users] poor network performance to one of two guests
by Philip Nelson 31 Jan '10

31 Jan '10

G'day, I have a host running two kvm guests. One of them gets very poor network performance, testing with iperf I get ~10MBit/sec to guest A, >400MBit/sec to guest B (running iperf between the host/guest). Both guests are using the same bridge: Guest A: <interface type='bridge'> <mac address='54:52:00:75:24:91'/> <source bridge='br0'/> </interface> Guest B: <interface type='bridge'> <mac address='54:52:00:3b:13:2a'/> <source bridge='br0'/> </interface> The host and guests are debian lenny, the host I have updated with some packages from backports.org. The host is running 2.6.30 with qemu-kvm 0.12.2 and libvirt 0.7.5. The host has 8gig ram and a quad core xeon cpu. Each guest is given one vcpu, guest A has 3gig memory, guest B 1gig. I have tried starting them in a different order so that one gets vnet0 and one gets vnet1, it doesn't make a difference, it's always guest A that is slow. I'm a bit stuck here, I don't know what else to try. Below is some information for the host/guests, not sure what might be helpful: ifconfig eth1/br0/vnet0/1 output from the host: eth1 Link encap:Ethernet HWaddr 00:25:64:3b:65:de inet6 addr: fe80::225:64ff:fe3b:65de/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:7828 errors:0 dropped:0 overruns:0 frame:0 TX packets:6664 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4034843 (3.8 MiB) TX bytes:466838 (455.8 KiB) Interrupt:17 br0 Link encap:Ethernet HWaddr 00:25:64:3b:65:de inet addr:192.168.108.1 Bcast:192.168.108.255 Mask:255.255.255.0 inet6 addr: fe80::225:64ff:fe3b:65de/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:110047 errors:0 dropped:0 overruns:0 frame:0 TX packets:111420 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:5744145 (5.4 MiB) TX bytes:870431296 (830.1 MiB) vnet0 Link encap:Ethernet HWaddr 72:48:bc:10:45:d4 inet6 addr: fe80::7048:bcff:fe10:45d4/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:107881 errors:0 dropped:0 overruns:0 frame:0 TX packets:581468 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:7129781 (6.7 MiB) TX bytes:873414210 (832.9 MiB) vnet1 Link encap:Ethernet HWaddr 36:20:fc:df:52:66 inet6 addr: fe80::3420:fcff:fedf:5266/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:7918 errors:0 dropped:0 overruns:0 frame:0 TX packets:21692 errors:0 dropped:0 overruns:16236 carrier:0 collisions:0 txqueuelen:500 RX bytes:534843 (522.3 KiB) TX bytes:32575099 (31.0 MiB) # brctl show: bridge name bridge id STP enabled interfaces br0 8000.0025643b65de no eth1 vnet0 vnet1 # lsmod | grep kvm kvm_intel 47336 6 kvm 159032 1 kvm_intel ifconfig output from guest A: eth0 Link encap:Ethernet HWaddr 54:52:00:75:24:91 inet addr:192.168.108.100 Bcast:192.168.108.0 Mask:255.255.255.0 inet6 addr: fe80::5652:ff:fe75:2491/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:21708 errors:0 dropped:0 overruns:0 frame:0 TX packets:8155 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:32576795 (31.0 MiB) TX bytes:553329 (540.3 KiB) Interrupt:10 ifconfig output from guest B: eth0 Link encap:Ethernet HWaddr 54:52:00:3b:13:2a inet addr:192.168.108.101 Bcast:192.168.108.0 Mask:255.255.255.0 inet6 addr: fe80::5652:ff:fe3b:132a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:582733 errors:0 dropped:18 overruns:0 frame:0 TX packets:109328 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:865856730 (825.7 MiB) TX bytes:7230359 (6.8 MiB) Interrupt:10 Base address:0xe000 Here is the guest A definition: <domain type='kvm'> <name>guestA</name> <uuid>a32a9d3b-e5ae-5943-c6db-52bc118f99c6</uuid> <memory>3145728</memory> <currentMemory>3145728</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/guestA'/> <target dev='vda' bus='virtio'/> </disk> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/guestA-data.img'/> <target dev='vdb' bus='virtio'/> </disk> <interface type='bridge'> <mac address='54:52:00:75:24:91'/> <source bridge='br0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> </devices> </domain> And guest B: <domain type='kvm'> <name>guestB</name> <uuid>1816a68e-929c-0b36-41ac-a380a4062298</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/guestB'/> <target dev='vda' bus='virtio'/> </disk> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/guestB-data.img'/> <target dev='vdb' bus='virtio'/> </disk> <interface type='bridge'> <mac address='54:52:00:3b:13:2a'/> <source bridge='br0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> </devices> </domain> Any help would be greatly appreciated. -- Philip

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[libvirt-users] Storage requirement for KVM
by anuj rampal 30 Jan '10

30 Jan '10

Hi all, I have to buy a server machine and Run KVM on it. I just wanted to know what type of storage devices are supported by KVM. Thanks & Regards Anuj

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[libvirt-users] How to debug Ubuntu 8.04 LTS guest crash during install?
by Neil Aggarwal 28 Jan '10

28 Jan '10

Hello: I am using kvm on a CentOS 5.4 server. I am trying to install the TunkeyLinux Core appliance found here: http://www.turnkeylinux.org/core I downloaded the ISO file from the web site. Then, I used this command to intall it: virt-install -n tkl-core -r 512 --vcpus=1 --check-cpu --os-type=linux --os-variant=ubuntuhardy -v --accelerate -c /tmp/turnkey-core-2009.10-hardy-x86.iso -f /var/lib/libvirt/images/tkl-core.img -s 15 -b br0 --vnc noautoconsole When I connect to the VNC console, I get the Turnkey linux options screen. I select Install to hard disk from there and it seems to start the install but crashes during the installer startup. This is repeatable so there has to be a way to debug it. I tried turning on the debug option for virt-install but that did not give me any useful info. Any ideas how to debug this? Thanks, Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net/cpanel cPanel/WHM preinstalled on a virtual server for only $40/month! No overage charges, 7 day free trial, PayPal, Google Checkout

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[libvirt-users] Stealing ownership: chown user->qemu->root
by Matthew Farrellee 27 Jan '10

27 Jan '10

F12, libvirt 0.7.1-15, qemu 0.11.0-12, 32 bit I recently discovered that libvirt is stealing ownership of my disk images. How can I make it stop? I have a disk image in my home directory, owned by matt. When I create a domain that uses the disk it gets chowned to qemu.qemu. When the domain terminates it is owned by root.root. I've lost access to the file. It has been suggested that the user->qemu happens to make sure that the qemu account can read/write the file. chmod'ing would be far better and avoid this problem. It appears that libvirt just assumes the disk image was owned by root before being chown'd to qemu. Another problem with this is qcow disks. If chown'ing to qemu is to ensure that qemu has access to all the disks needed for the domain, it fails for qcow, because the base disk is not chown'd as well. This can result in a very cryptic error message (funny period (.)): monitor socket did not show up.: No such file or directory For instance, base.img is owned by matt (u=rw,go=), a qcow disk qcow.img is linked to base.img. When a domain using qcow.img is created qcow.img is owned to qemu, but base.img is not. Instead of chown'ing, will libvirt provide an error that could cover both these situations? The virt-manager GUI (or virsh TUI) could interpret that error and chmod the proper files transparently, or preemptively chmod the required files. Users of the libvirt API would have to make sure things are setup properly at first and would not have to worry about side-effect changes made by libvirtd. I think the suggestion holds even if is only the qemu driver doing the chown. Best, matt

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[libvirt-users] domain -> IP
by Matthew Farrellee 27 Jan '10

27 Jan '10

How can I map from a domain to the IP(s) given to its network interfaces? I'm not specifying a <mac .../> to the domain, so I don't have an upfront mapping setup. Is the best way to do some upfront mapping, e.g. install static MAC -> IP in the DHCP server and add <mac .../> to my domains? Best, matt

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[libvirt-users] monitor option in libvirt ?
by Riccardo Veraldi 27 Jan '10

27 Jan '10

Hello, I woudl liek to start qemu-kvm with -monitor myfile.pipe options instead of default -monitor pty Anyway I have not found any way to tell libvirt (using virsh) that I want to set a specific -monitor option to the qemu-kvm command line. How can I do this ? I do not want to start manually qemu-kvm because in this way I will loose the libvirt VM management thanks Rick

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[libvirt-users] domain definition storage
by Arik Raffael Funke 27 Jan '10

27 Jan '10

Hi, I defined several xen domains with libvirt. Can anybody tell me where libvirt stores these definitions? E.g. what files would one need to back up? Is it correct, that the xen domain definitions in /var/lib/xend/domains are overwritten regularly by libvirt? Many thanks, Arik

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