July 2010 - Users - libvirt List Archives

[libvirt-users] Allow customer to stop and start their own VPS, but not others
by Neil Aggarwal 19 Jul '10

19 Jul '10

Hello: One of my customers asked for access to stop and start their VPS. Right now, I can do that using virsh, but I do not want to give this customer the ability to stop and start all VPSs running on the host. Is there a way to give stop and start control of one VPS to someone? I am using KVM on a CentOS 5.5 host. Thanks, Neil -- Neil Aggarwal, (281)846-8957 FREE trial: Virtualmin VPS with unmetered bandwidth http://UnmeteredVPS.net/virtualmin

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[libvirt-users] kvm migration problem
by mahsa najafzadeh 19 Jul '10

19 Jul '10

Hi, I am running ubuntu 9.10, with kvm and libvirt-bin, etc. Using virsh, I can't live-migrate a VM from host1 to host2. It reports a unknown failure. The VM image is accessible on both source and destination hosts located on a shared storage using nfs. Image directory is on the same path on both hosts. The src and destination hosts are on the same subnet. I can connect to remote host with qemu+ssh but I can't migrate. my configuration is: $ uname -a Linux mahsa1-desktop 2.6.31-21-generic-pae #59-Ubuntu SMP Wed Mar 24 08:47:55 UTC 2010 i686 GNU/Linux $virsh # version Compiled against library: libvir 0.7.0 Using library: libvir 0.7.0 Using API: QEMU 0.7.0 Running hypervisor: QEMU 0.11.0 Connect to the local machine's hypervisor as follows and see the localmachines:$virsh # connect qemu:///system $virsh # list Id Name State -------------------------------- 2 VmLinux11 running 3 VMLinux12 running 4 VmLinux13 running Verify connectivity to the hypervisor of the remote target system asfollows:$virsh connect qemu+ssh://host2name/system Attempt the migration as follows:$virsh migrate --live VmLinux13 qemu+ssh://host2name/system Connecting to uri: qemu:///system root@host2name's password: error: Unknown failure the log file on the source physical host gives this:14:57:13.514: error : remoteIO:7184 : operation failed: migrate failed: migrate "tcp:host2name:49161" migration failed 14:57:13.709: error : remoteIO:7184 : Unknown failure I disable the firewall on both hosts but it doesn't still work. please help me.

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[libvirt-users] ESX - How to create a new domain
by George Goh 18 Jul '10

18 Jul '10

Hi, I've been trying to figure out how to create a new domain(create a new virtual machine) using the ESX driver. The documentation at http://libvirt.org/drvesx.html says: To define a new domain the driver converts the domain XML into a VMware VMX file and uploads it to a datastore known to the ESX server. Because multiple datastores may be known to an ESX server the driver needs to decide to which datastores the VMX file should be uploaded. The driver deduces this information from the path of the source of the first file-based harddisk listed in the domain XML. But I can't find a way to do this in virsh. Any ideas? -George

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[libvirt-users] How to create a guest os from existing disk image file
by Rajiv Rajaian 15 Jul '10

15 Jul '10

Hi I have configured KVM with Fedora Core 13 by enabling the KVM virtualization option while installing OS. I have successfully created the guest OS by using the virt-install API /usr/sbin/virt-install --name centos5 --ram 512 --disk path=/var/lib/libvirt/images/ centos.img,size=5 --network network:default --accelerate --vnc -c /tmp/CentOS-5.3-i386-bin-DVD.iso I am able to login to the guest OS using the virt-viewer command using vnc Now i want to the guest os from the existing configured disk /var/lib/libvirt/images/centos.img.. What modifications should be done with my configuration file ?? Pleas help me to solve this. [root@kvmcluster ~]# virsh dumpxml centos5 <domain type='qemu' id='2'> <name>centos5</name> <uuid>cabfad09-ff8b-e1ca-051a-6729e301f6a1</uuid> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu>1</vcpu> <os> <type arch='i686' machine='fedora-13'>hvm</type> <boot dev='cdrom'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>destroy</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/centos.img'/> <target dev='hda' bus='ide'/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu'/> <source file='/tmp/CentOS-5.3-i386-bin-DVD.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='network'> <mac address='52:54:00:bf:32:c2'/> <source network='default'/> <target dev='vnet0'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/2'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/2'> <source path='/dev/pts/2'/> <target port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' keymap='en-us'/> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> </devices> <seclabel type='dynamic' model='selinux'> <label>system_u:system_r:svirt_t:s0:c370,c413</label> <imagelabel>system_u:object_r:svirt_image_t:s0:c370,c413</imagelabel> </seclabel> </domain> Thanks/Regards. Rajiv.R Project Associate. CARE. MIT Anna University Chennai

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[libvirt-users] C# Client Fails to Locate libvirt-0.dll
by Development 14 Jul '10

14 Jul '10

Attempting to develop C sharp client that uses libvirt DLL. Despite placing the libvirt DLL in a number of different locations, call to virConnectOpen() fails consistently with a DLL not found exception. Declaration as follows: [DllImport("libvirt-0.dll")] private static extern IntPtr virConnectOpen(String name); Called as follows: IntPtr conn = virConnectOpen(null); Suggestions? Tim McLeod

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[libvirt-users] how to deactivate an active network with virsh? (and what is that anyway)
by John Lumby 14 Jul '10

14 Jul '10

virsh provides net-start <netname-or-id> to activate an inactive network. Does virsh provide any way to do the exact converse? deactivate an active network without destroying, undefining, removing, ... Also - I am curious - what does activate actually do? What change in state of anything occurs? ( I read the document at http://libvirt.org/formatnetwork.html which the man page referred me to but it had nothing to say on this. I did not try to read the code). John _________________________________________________________________ MSN Dating: Find someone special. Start now. http://go.microsoft.com/?linkid=9734384

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[libvirt-users] virStream functions
by Camilo Aguilar 08 Jul '10

08 Jul '10

May anybody tell me which is the porpose of virStream functions ? Thanks in advance. Camilo Aguilar

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[libvirt-users] Get ip address of a running domain
by adrian wyssen 08 Jul '10

08 Jul '10

Hi, I wanted to know if it is possible to get the IP address of a running domain. The domain get's this IP dynamicly via DHCP, but I need to know it once it gets it. I tired virDomainGetXMLDesc, but this only returns the MAC address... Thanks for any help. Adrian

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[libvirt-users] Blockpeek.. A little help please
by steven765＠yahoo.com 07 Jul '10

07 Jul '10

Hi, I'm trying to use blockpeek to open the contents of a file. Inside the vm i ran debugfs: imap /test/findme and got: inode 32642 is part of block group 4 located at block 131074, offset 0x0100 I try using 0x100 or 256 as the offset to blockpeek into that VM and get nonsense as a result. Am I calculating the offset incorrectly, is there a better way to find a file's location on disk? And then open it? I'm just printing the return as a string from the buffer looping over size. Is that incorrect? Thanks again, Steve

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[libvirt-users] Release 0.4.6 of the libvirt java bindings
by Bryan Kearney 06 Jul '10

06 Jul '10

I have just released 0.4.6 of the java libvirt bindings. This release adds support for the 0.8.2 libvirt API as well as some code cleanup patches from Luis Costa (Thank you!). You can access the latest version via the following means: Source Code: http://www.libvirt.org/git/?p=libvirt-java.git;a=summary Bundled Source (tarball and SRPM): http://libvirt.org/sources/java/ Maven: http://libvirt.org/maven2/. They should hit the central repo in a day or two. RPMS are making their way though the Fedora Rawhide build path Thank you! -- bk

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