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[libvirt-users] general protection and other errors
by Alex 19 Oct '11

19 Oct '11

Hi, I'm having a problem with a fedora15 x86_64 host with a fedora15 x86_64 guest on a Xeon E3-1240 with 8GB RAM on the guest. This is the only guest. The server is configured as a mail server, using spamassassin, postfix, amavisd, and clamav. It was previously running without error on different hardware. I migrated the disks to a more powerful server due to load. It's a new server, and has been stress tested with memtest86, mprime, and passmark's Linux test for more than 24 hours without producing a problem. However, when I run the kvm vm, I receive a bunch of errors similar to these on the guest: [169245.360511] clamscan[27448] general protection ip:7f125f2e6ffb sp:7fff117566f0 error:0 in libclamav.so.6.1.11[7f125f229000+9ce000] [29016.445470] clamd[1110] general protection ip:30df2c3981 sp:7fffa08f4fe0 error:0 in libclamav.so.6.1 .11[30df200000+9ce000] There are other applications, such as pyzor, that produce similar errors. Is this something that could be a result of some software configuration error I've made? Is there something I can do to debug this further? There also aren't any errors on the host indicating a kernel problem or hardware issue. Is it possible this is a known error? I was previously trying to improve IO performance by using 'block' instead of 'file' for the device, but had to abandon that idea because it didn't work and I had to concentrate on this problem. Could disabling the cache (cache=none) cause this? I've included some info below, in hopes someone could guide me towards a solution. # rpm -qva|egrep 'kvm|libvirt|kernel|qemu' libvirt-python-0.8.8-7.fc15.x86_64 kernel-2.6.40.6-0.fc15.x86_64 qemu-img-0.14.0-8.fc15.x86_64 gpxe-roms-qemu-1.0.1-4.fc15.noarch kernel-2.6.40.4-5.fc15.x86_64 qemu-system-x86-0.14.0-8.fc15.x86_64 libvirt-0.8.8-7.fc15.x86_64 libvirt-client-0.8.8-7.fc15.x86_64 qemu-common-0.14.0-8.fc15.x86_64 kernel-headers-2.6.40.6-0.fc15.x86_64 qemu-kvm-0.14.0-8.fc15.x86_64 I've included my domain config below in hopes it helps. <domain type='kvm'> <name>mail02</name> <uuid>ec4f3cf5-2f27-fb3e-72f6-3fa3176b13b6</uuid> <memory>6291456</memory> <currentMemory>6291456</currentMemory> <vcpu>4</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>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/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/var/lib/libvirt/images/mail02.img'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:67:2c:4c'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> </devices> </domain> Thanks, Alex

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Re: [libvirt-users] no connection driver available for openvz:///system
by Trey Dockendorf 18 Oct '11

18 Oct '11

2011/10/12 张立洪 <zlh_086(a)126.com> > thanks for help. > > I download a new libvirt 0.8.1,and compile libvirt.spec. and I success.I > can use virsh command connect openvz. > > but I want use libvirt manager KVM and openvz simultaneously.can you tell > me how can I implement.....? > openvz and kvm 's VMs can network interconnect? > the end I want to ask whether libvirt0.9.6 support openvz,vbox,lxc etc? > > thanks very much again!!!! look forward to your replies. > > > > > Replying back to the list as this may be useful for others. Personally, I don't know openvz or its capabilities, but you can use something like virt-manager to manage anything controlled by Libvirt. If the openvz server connects via libvirt then virt-manager should be able to manage that also. In virt-manager you'd just do "File" -> "Add Conection" to connect a new server to the same interface. I'd recommend also upgrading the CentOS 6 CR. The version of libvirt fixes many issues I've run into, primarily the snapshot capabilities. Also the virt-manager version in CentOS 6 is very dated. I have one you can download that is the latest I've found to work with libvirt-0.8.1 and libvirt-0.8.7 (CentOS 6.1 / CR). http://itscblog.tamu.edu/virt-manager-0-8-7-for-centos-6/ . I'll be updating the virt-manager RPM shortly, to just incorporate changes from upstream RedHat. - Trey

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[libvirt-users] Virtio Balloon- Can not see the results
by d hee 18 Oct '11

18 Oct '11

with kvm and virtio- would -m 1024 take proceedence over -balloon virtio? when i use both together, i see memory stay around 1024 MB less on my host side. I know the guest is not taking but a fraction of that ram, so I would expect the virtio balloon to take the majority of the guests ram and hand it back to the host. this is using the free util/command to take snapshots of the host memory. thanks, -dman

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[libvirt-users] Help with running virt-top from Java file
by PREETHI RAMESH 17 Oct '11

17 Oct '11

I've been trying to run virt-top to save the usage statistics to a csv file from my Java code using process builder. However, this gets executed in the Java file but I don't seem to find the file created anywhere. Is executing virt-top possible via a Java code? I'm using the example here<http://forums.devx.com/showthread.php?t=147403>replacing ls -l with virt-top --csv file2.csv. I plan to generate the graphs from the csv files to load them on to my Java UI. If there are other alternatives to my method, please tell me as I've been trying to get one for almost a week now. Thanks a lot! Preethi

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[libvirt-users] libvirt ESXI driver's capabilities
by חץ בן חמו 17 Oct '11

17 Oct '11

Hello, I've read a bit about libvirt in the web site, and I couldn't find anywhere whats the VMWare driver is capable of. I'm planning to build something that will let me manage multiple ESXI hosts (without vcenter) and before I hire a developer, I would like to ask if it supports the following items: * creating thin provisioning disks (when creating a new vm for example) * snapshots - create / restore / limit amounts of snapshots * modifications of live machines (if possible) * graphs (is it possible to build graph with libvirt??) * shutdown / pause / restart I really wish there was a document which would show the driver's limitations.. Another question: is there any book / pdf which is updated and can provide the info of what libvirt capabilities are there and how to use them? Thanks, Hetz

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[libvirt-users] virt-install.
by Chuck LaVerde 16 Oct '11

16 Oct '11

Why does virt-install shutdown the guest after the initial install? Is there a way to have the guest reboot after the initial installation? Chuck

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[libvirt-users] XML file format for snapshot-create
by Trey Dockendorf 13 Oct '11

13 Oct '11

I've created a very basic snapshot XML file, to allow for a description of the snapshot. However when running the virsh command, it doesn't like the formatting. # virsh snapshot-create proxy_0 /vmstore/proxy_0/proxy_0_ss.xml error: XML description for failed to parse snapshot xml document is not well formed or invalid This are the XML file contents... # cat proxy_0_ss.xml <domainsnapshot> <name></name> <description>Before updating to CR repo</desciption> </domainsnapshot> I'm running libvirt-0.8.7 on CentOS 6 x86_64. I can take snapshots just fine without defining the XML file, but I'd like to be able to add a description. Thanks - Trey

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[libvirt-users] BIOS Delay
by xuteng 13 Oct '11

13 Oct '11

Hi, Does the libvirt support the bios delay ? I mean that after set a special number of seconds or minutes, when the domain starts, the bios will delay after the time I set Thanks for your time wade xuteng via foxmail

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[libvirt-users] Live Migration using Libvirt migrate()
by PREETHI RAMESH 12 Oct '11

12 Oct '11

Hi, This is a follow up of the mail regd migration I'd posted a few days ago. My scenario: I'm creating two virtual machines images from an Ubuntu 10.10 iso of RAM size 128 and 700 MB. Using the migrate() , I migrate it from the current physical machine to the destination machine via a 100 Mbps switch LAN connection. BOTH migrations take the same amount of time. Checking out the eth0's transmitted and received bytes after and before the migration, I find that there's NO change in the readings. Using any other method to migrate(virsh,Qemu) takes a substantial amount of time(close to 10 seconds) for the 128 and 700 MB images. How can this drastic change in migration time be accounted for? Are there any other ways to check if the VM has been successfully migrated to the destination(i tried using virsh console after migrate() but for some reason it just hangs. I tried out the suggested patches on various sites but to no avail)? Is pinging the migrated VM from its PM a sure test for successful migration? Thanks guys.

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[libvirt-users] Performance tuning questions for mail server
by Alex 11 Oct '11

11 Oct '11

Hi, I have a fedora15 x86_64 host with one fedora15 guest running amavis+spamassassin+postfix and performance is horrible. The host is a quad-core E13240 with 16GB and 3 1TB Seagate ST31000524NS and all partitions are ext4. I've allocated 4 processors and 8GB of RAM to this guest. I really hoped someone could help me identify areas in which performance can be improved at both the guest and host. Load on the server is regularly above 20, yet the processors generally are idle and the host is still responsive. Should the concentration of the performance tuning be done on the guest or the host? I've read through the information at http://libvirt.org/formatdomain.html#elementsMemoryTuning but I don't know how the settings apply to my configuration and which ones apply to my hardware. I've included my libvirt xml config below. It was built using virt-manager on fedora15. There appears to be quite a few other options that are available and not provided by virt-manager that I would like to be able to use. I've done a little kernel tuning on the host, although it doesn't appear to have made much difference. Are there a set of values for kernel parameters that would be advisable to make for a mail server? Here is what I currently have: # sysctl -p net.ipv4.ip_forward = 1 net.ipv4.conf.default.rp_filter = 1 net.ipv4.conf.default.accept_source_route = 0 kernel.sysrq = 0 kernel.core_uses_pid = 1 net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0 net.ipv4.ip_forward = 1 net.ipv4.conf.default.rp_filter = 0 net.ipv4.conf.all.send_redirects = 0 net.ipv4.conf.default.send_redirects = 0 net.ipv4.icmp_ignore_bogus_error_responses = 1 net.ipv4.conf.all.log_martians = 0 net.ipv4.conf.default.log_martians = 0 net.ipv4.conf.default.accept_source_route = 0 net.ipv4.conf.all.accept_redirects = 0 net.ipv4.conf.default.accept_redirects = 0 vm.vfs_cache_pressure = 35 vm.nr_hugepages = 512 net.ipv4.tcp_max_syn_backlog = 2048 fs.aio-max-nr = 1048576 vm.dirty_background_ratio = 3 vm.dirty_ratio = 40 After making changes, do you have any recommendations on which tools to use to monitor those changes and see how they perform? I have noatime set in fstab in the guest for the /var partition, where much of the spamassassin occurs. I've included below my libvirt xml config for the guest and hoped someone could make some recommendations on how to apply the cputune and memtune parameters to my system. <domain type='kvm'> <name>mail02</name> <uuid>ec4f3cf5-2f27-fb3e-72f6-3fa3176b13b6</uuid> <memory>8388608</memory> <currentMemory>8388608</currentMemory> <vcpu>8</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>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/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/mail02.img'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:67:2c:4c'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> </devices> </domain> Thanks, Alex

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Re: [libvirt-users] Libvirt newbie, need help with doubts
by Eric Blake 07 Oct '11

07 Oct '11

Forwarding to the list (this was mistakenly sent to just me) On 10/07/2011 11:32 AM, Mohammed Naser wrote: > On 2011-10-07, at 12:13 PM, Eric Blake<eblake(a)redhat.com> wrote: > >> On 10/07/2011 05:28 AM, PREETHI RAMESH wrote: >>> >>> 3. I'm developing an application in Java to monitor VM usage(Memory,CPU, >>> Network etc). Are there any easily integrable graph plotting applications I >>> could integrate with? >> >> Sorry, I can't answer this one. > > There is a plugin that collects resource details of libvirt for > collectd. I believe that collectd collects data in an RRD database and > I'm sure you can find an RRD charting library for Java. > >> >> -- >> Eric Blake eblake(a)redhat.com +1-801-349-2682 >> Libvirt virtualization library http://libvirt.org >> >> _______________________________________________ >> libvirt-users mailing list >> libvirt-users(a)redhat.com >> https://www.redhat.com/mailman/listinfo/libvirt-users > > Regards, > Mohammed Naser > > Sent from my iPhone -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org

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[libvirt-users] Libvirt newbie, need help with doubts
by PREETHI RAMESH 07 Oct '11

07 Oct '11

Hi, These are my doubts: 1. I tried live migration of Ubuntu 11.04 from the one physical machine to another using the migrate() function. I connected via tcp in the destination URI and migrated successfully(lesser than 2 seconds). I tried running virsh list --all on the destination PM and confirmed that the VM had been migrated successfully. When I tried checking ps aux | grep vmname where vmname was the name of the VM migrated, I could see that on the source PM the thread was still active with the PID though the machine had been migrated successfully. Shouldn't the vmname not be listed at all on the source PM's side,if it has been completely migrated? Isn't 2 seconds too little(considering the memory allotted to the VM was 128MB and I'm using a 100Mbps LAN switch, time taken=size/speed~10 seconds). Why is virsh list --all showing me that the VM migrated to be shutdown on the source PM? If it's been completely migrated, shouldn't the entry be removed completely? 2. Is there any way to set the CPU limit in terms of % of CPU used on a VCPU using libvirt function? As in, if I want my VM to use just 10% of VCPU 1. 3. I'm developing an application in Java to monitor VM usage(Memory,CPU, Network etc). Are there any easily integrable graph plotting applications I could integrate with? Thanks for your time. Regards, Preethi

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[libvirt-users] Reg: shutdown/restart from within the container(system LXC)
by Alphonse Hansel Anthony 07 Oct '11

07 Oct '11

Hi, Is it possible to shutdown/restart a system LXC from within the container? From what I have observed(Version - 0.8.4): * The libvirt_lxc manager process, which listens on the /dev/pts for console connection loops infinitely. Let me know If I am missing out something obvious or there exists any other way to shutdown/restart system LXC from within. Any pointers in this regard would be useful. Thanks, Alphonse

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[libvirt-users] Libvirt for custom VM
by ankur deshwal 07 Oct '11

07 Oct '11

Hi, I need to create an application where I can use a single interface for different VMs (libvirt becomes an obvious choice then). However I will need to control a VM running on custom hypervisor other than ones currently supported by libvirt. Is it possible to add a new interface to the hypervisor (easily)? Shall I try to use "test-hypervisor" supported by libvirt ?? I shall be grateful for some initial pointers to read which can help me for the task. Thanks and Regards, Ankur

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[libvirt-users] Need help debugging virtio net issue
by Darren Dao 05 Oct '11

05 Oct '11

This is what I use for creating the VM sudo virt-install -n myvm -r 2048 --vcpus=1 --accelerate -v -w bridge:br0,model=virtio --nographics -m 54:52:00:01:bb:8d --disk path=/storage_pool/myvm.raw,size=20,bus=virtio --pxe It used to work fine, but now it get stuck trying to do pxeboot/kickstart. Here's what I see when trying to debug the pxeboot/kickstart process: * Querying DHCP server for IP address went through fine * vmlinuz.CentOS5-5.5-x86_64 was downloaded successfully * initrd.img.CentOS5-5.5-x86_64 started to get transferred, but then stopped. It looks like the VM's network interface just crashed (can't even ping the VM anymore) If I don't use virtio for networking, then everything went through fine. What's strange that is virtio used to work fine. I ran out of ideas/ways to debug this issue. Any has any idea? Here's more info on my system: Host: * Scientific Linux 6, kernel version: 2.6.32-71.el6.x86_64 * libvirt: 0.8.1-27 * qemu-kvm: 0.12.1.2-2.113 Guest: * Scientific Linux 6, kernel version: 2.6.32-71.el6.x86_64

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[libvirt-users] libvir: Remote error : cannot recv data: : Connection reset by peer
by PREETHI RAMESH 04 Oct '11

04 Oct '11

I'm using Libvirt's Java API and connecting to the hypervisor using the same. My program is such that periodic discovery of active VMs is done using Libvirt's functions. However, when I try to perform any VM related operations while the Java code connecting to Qemu is running such as shutdown, start VM using virsh, I end up with : 'libvir: Remote error : cannot recv data: : Connection reset by peer' on my Java IDE and 'error: cannot recv data: : Connection reset by peer error: failed to connect to the hypervisor' on the terminal running virsh. I'm using QEMU emulator version 0.14.0 (qemu-kvm-0.14.0) and Libvirt version 0.4.7 on Ubuntu 11.04. Please help me out! Thanks.

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[libvirt-users] Usage serial device
by David Goulet 04 Oct '11

04 Oct '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I'm trying to connect the *same* serial device to two KVM Linux machines where one is running KGDB and the other uses the connected serial to interact with the target machine running under KGDB. However, I'm unable to do so. Using a pty port, I am able to use my kgdb setup with host/VM but unable to make it work with VM/VM since it's two different pty created on the two machines. Anyone on this list can help me with that kind of setup ? Unfortunately, I must use libvirtd 0.7.5 for now... I'm aware that it might be a version issue here but still... Thanks! David -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAEBAgAGBQJOihLOAAoJEELoaioR9I02GawH/1Ux197Pj3F+Qf54LcI3yy+w Vhd8yOGIAreBES7FUIf/7dCFqUz2mXFbtRuo9KZi+M0qs02kEs/nbhgOJLmHdZFA iRdCprzCR4Ue1x8H/tVogfBElfGhlJDaPHx5KIsxDmXwPJYhrPBt8qhyzLSTVQZG /pibv03sQdGRM6ZIyIhbA3ZmZ7Yh0SToGl3Fodw5Yp6YjrxRtpTu/OkHuHweM+nq wxthsgVstAEjJSxwV5O1+GzQ8xVDzjvZTvSRXnU2mTKXTiW2CkbnPbDG7cYfAcdx jICcAOf4AHtuKt5ZTfXFMUT4qSPfEntoXKsjt1IpCOpYH70GNGxLkh96SKjS1+w= =AYT3 -----END PGP SIGNATURE-----

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[libvirt-users] Second VM cannot get dhcp ip in NAT mode
by Magicloud Magiclouds 03 Oct '11

03 Oct '11

Hi, Yesterday I started to use libvirt with kvm under centos6. The first VM works great. Today I added another VM and start to initialize with virt-install. Well, it seems that, the second VM cannot get dhcp ip. I did not change the default libvirt network configuration. What should I do? -- 竹密岂妨流水过山高哪阻野云飞

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[libvirt-users] qemu+ssh fails with "packet received from server too large"
by Trey Dockendorf 01 Oct '11

01 Oct '11

I'm attempting to connect to my KVM host from a remote system, but am unable to connect using virsh. I'm able to connect if I disable sasl on the KVM host... The KVM host is on CentOS 6 x86_64 with libvirt-0.8.1 Here's the command I'm using, --------- $ virsh -c qemu+ssh://kvmhost.tld/system error: packet received from server too large error: failed to connect to the hypervisor Here's the uncommented lines in my /etc/libvirt/libvirtd.conf ----------- listen_tls = 1 listen_tcp = 0 listen_addr = "...." (set to eth0) key_file = "/var/lib/puppet/ssl/private_keys/kvmhost.tld.pem" cert_file = "/var/lib/puppet/ssl/certs/kvmhost.tld.pem" ca_file = "/var/lib/puppet/ssl/certs/ca.pem" log_level = 1 log_filters="1:remote 1:event" log_outputs="1:syslog:libvirtd 1:file:/var/log/libvirt/libvirtd.log" There is no output in /var/log/libvirt/libvirtd.log while trying to connect remotely through virsh. The only logs that are generated are /var/log/secure, -------------- Sep 30 19:34:53 kvmhost sshd[20074]: Accepted publickey for foreman from 10.1.0.1 port 55269 ssh2 Sep 30 19:34:53 kvmhost sshd[20074]: pam_unix(sshd:session): session opened for user foreman by (uid=0) Sep 30 19:34:53 kvmhost sshd[20074]: pam_unix(sshd:session): session closed for user foreman I've also opened up the port through iptables, 1 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:16514 And I don't see anything being blocked by SELinux during these connection attempts. Is there possibly a log filter I could enable to shed more light on this? Any help is greatly appreciated. Thanks - Trey

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[libvirt-users] Difficutlies with lp port
by Anselmo 30 Sep '11

30 Sep '11

Hello, I'm using libvirt on debian as host and Windows XP Home as guest. I would like to pass the /dev/parport0 to XP to attach a printer. I use virt-manager. When I add a parallel port as a "dev" type I got this conf file: .... <parallel type='dev'> <source path='/dev/parport0'/> <target port='0'/> </parallel> .... And this command line: .... -chardev tty,id=charparallel0,path=/dev/parport0 -device isa-parallel,chardev=charparallel0,id=parallel0 .... The first parameter is "tty".Should not it be "parport"? Anyway I never see any parallel port on the guest with these options. Even starting kvm from the command line. While is seems to work immediatly using the kvm option: "-parallel /dev/parport0" Where i've made a mistake? Or how can I just tell libvirt to use the "-parallel" option instead. Thank's for your help Anselmo Luginbühl

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[libvirt-users] win7 instance just disappears
by Alex 30 Sep '11

30 Sep '11

Hi, I have a fedora15 box with a win7 kvm instance that has been running for some time, but lately it seems to just crash and disappear without any idea of what happened. It's never happened while I have been using it, only when the instance is idle. I usually start the instance using virt-manager, but also start it just using "virsh start mykvm" then access it using the spicec client. I can't find any logging information to indicate why this is happening or how to go about fixing it. I've tried accessing it using the normal virt-manager client as well as the spicec client an it doesn't make any difference. When it crashes, the whole process is gone. Is there something that could cause it to do this when the system is idle? I also installed the qxl video drivers (qxl-win-0.1010-20110308-d9eb3203bd) some time ago, so it could possibly be related to that. I thought it might be helpful to have a copy of the qemu XML file: <domain type='kvm'> <name>alex-win7</name> <uuid>f7decb31-88cf-d003-8716-66258550b996</uuid> <memory>3145728</memory> <currentMemory>3145728</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu match='exact'> <model>Opteron_G3</model> <vendor>AMD</vendor> <feature policy='require' name='skinit'/> <feature policy='require' name='vme'/> <feature policy='require' name='mmxext'/> <feature policy='require' name='fxsr_opt'/> <feature policy='require' name='cr8legacy'/> <feature policy='require' name='ht'/> <feature policy='require' name='3dnowprefetch'/> <feature policy='require' name='3dnowext'/> <feature policy='require' name='wdt'/> <feature policy='require' name='extapic'/> <feature policy='require' name='pdpe1gb'/> <feature policy='require' name='osvw'/> <feature policy='require' name='cmp_legacy'/> <feature policy='require' name='3dnow'/> </cpu> <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'> <driver name='qemu' type='raw'/> <source file='/home/libvirt-images/alex-win7.img'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/home/libvirt-images/alex-win7a-2.img'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='virtio-serial' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </controller> <interface type='bridge'> <mac address='52:54:00:6c:6c:47'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <channel type='spicevmc'> <target type='virtio' name='com.redhat.spice.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='mouse' bus='ps2'/> <graphics type='spice' autoport='yes'/> <sound model='ich6'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <video> <model type='qxl' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain> Thanks, Alex

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[libvirt-users] ANNOUNCE: Perl binding release Sys-Virt version 0.9.5
by Daniel P. Berrange 29 Sep '11

29 Sep '11

I am pleased to announce a new release of the Perl binding, Sys::Virt version 0.9.5, is now available for download: http://search.cpan.org/CPAN/authors/id/D/DA/DANBERR/Sys-Virt-0.9.5.tar.gz Changes in this release - Add all new APIs in libvirt 0.9.5 - Add missing snapshot creation/lookup methods - Fix typo in method listing snapshots - Add missing snapshot constant - Add example for save/restore usage - Re-add abort job binding accidentally deleted All historical releases and online documentation are available from the CPAN page http://search.cpan.org/dist/Sys-Virt/ There is no planned update for libvirt 0.9.6, since that did not introduce any new APIs that require work in the Perl layer. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|

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[libvirt-users] virsh cannot list broken guest.
by Magicloud Magiclouds 29 Sep '11

29 Sep '11

Hi, I am starting to learn using libvirt with kvm on CentOS 6. Just used this command to start a guest: virt-install -ntest -r1024 --vcpus=1 -c/var/lib/libvirt/images/CentOS-6.0-x86_64-netinstall.iso --os-type=linux --os-variant=rhel6 --disk vol=kvmguests/test --vnc -v --virt-type=kvm --check-cpu --prompt --arch=x86_64 Then I found out that I misconfigured vnc. And I do not know how to gracefully stop qemu. So I killed it. Then with the command, I got: ERROR Guest name 'test' is already in use. What is the name of your virtual machine? But at this time, there is nothing listed in virsh: Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # list Id Name State ---------------------------------- virsh # connect qemu:///system virsh # list Id Name State ---------------------------------- virsh # What should I do? -- 竹密岂妨流水过山高哪阻野云飞

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[libvirt-users] Snapshot Error
by huachao yao 28 Sep '11

28 Sep '11

Hey When I want to take a snapshot for a Domain by using virDomainSnapshotCreateXML. The Error as below happen: libvir: QEMU error : Requested operation is not valid: Disk '/var/lib/libvirt/images/fedora-qcow.qcow2' does not support snapshotting The snapshot Configuration is : <domainsnapshot> <description>Snapshot of OS install and updates</description> <disks> <disk name='/var/lib'> <source file='/var/lib-snapshot'/> </disk> <disk name='vdb' snapshot='no'/> </disks> </domainsnapshot> And /var/lib/libvirt/images/fedora-qcow.qcow2 is the disk for the domain (use qemu-img to create). And I had tried another Disk format (*.img), but the error still happen. how can i deal with this error?? PS:qemu version is 0.14 & libvirt version is 0.9.4. Pls help. :-(

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[libvirt-users] how to convert from xen .cfg files to libvirt xml?
by Mauro 27 Sep '11

27 Sep '11

I have a .cfg configuration file for a xen virtual machine. I need to convert it in xml format to use with libvirt. So I run virsh domxml-from-native xen-xm backupsrv.cfg but I have an error: error: Unknown failure. How can I investigate about the error?

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