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[libvirt-users] undefining and redefining a Domain
by Roberto Attias (rattias) 01 Oct '10

01 Oct '10

<resending as I don't think I was in the mailing list yet when I sent first time... apologies if you receive this twice> Hello, I'm facing some strange behavior, and I hope you can provide a clarification. Consider the following code: virDomainPtr dom = virDomainLookupByName(virt, domain_name); if (dom) { printf("domain already defined...\n"); if (virDomainUndefine(dom)) printf("...unable to undefine!!!\n"); else { printf("...undefined."); free(dom); } } dom = virDomainDefineXML(virt, SOME_XML); if (dom != NULL) { const char *name = virDomainGetName(dom); printf("NAME IS NOW: %s\n", name); } else printf("dom is NULL!\n"); When executed the first time, the code correctly defines the domain, and prints: defining domain test2-vm libvir: QEMU error : Domain not found: no domain with matching name 'test2-vm' NAME IS NOW: test2-vm If executed a second time with the same SOME_XML when the domain is already defined, it prints: defining domain test2-vm domain already defined... libvir: Domain error : invalid domain pointer in virDomainGetName undefining......undefined.NAME IS NOW: (null) Not only the name is null, but the domain can't be started. What is the correct way to undefined programmatically a domain that is already defined? Why is the second virDomainDefineXML() returining a pointer (as opposed to null), but the pointed object seem to be invalid? Thanks, Roberto

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[libvirt-users] how to programmatically undefine and redefine a Domain?
by Roberto Attias (rattias) 01 Oct '10

01 Oct '10

Hello, I'm facing some strange behavior, and I hope you can provide a clarification. Consider the following code: virDomainPtr dom = virDomainLookupByName(virt, domain_name); if (dom) { printf("domain already defined...\n"); if (virDomainUndefine(dom)) printf("...unable to undefine!!!\n"); else { printf("...undefined."); free(dom); } } dom = virDomainDefineXML(virt, SOME_XML); if (dom != NULL) { const char *name = virDomainGetName(dom); printf("NAME IS NOW: %s\n", name); } else printf("dom is NULL!\n"); When executed the first time, the code correctly defines the domain, and prints: defining domain test2-vm libvir: QEMU error : Domain not found: no domain with matching name 'test2-vm' NAME IS NOW: test2-vm If executed a second time with the same SOME_XML when the domain is already defined, it prints: defining domain test2-vm domain already defined... libvir: Domain error : invalid domain pointer in virDomainGetName undefining......undefined.NAME IS NOW: (null) Not only the name is null, but the domain can't be started. What is the correct way to undefined programmatically a domain that is already defined? Why is the second virDomainDefineXML() returining a pointer (as opposed to null), but the pointed object seem to be invalid? Thanks, Roberto

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[libvirt-users] Can't plug usb device
by Jesus Urroa 01 Oct '10

01 Oct '10

Hi I'm trying to hotplug an usb device into kvm but the device is not attached this is the definition: cat kingston.xml <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x1131' /> <product id='0x1001' /> </source> </hostdev> the attach and detach commands virsh attach-device ShadowFax kingston.xml El dispositivo fue asociado exitosamente virsh detach-device ShadowFax kingston.xml El dispositivo fue desmontado exitosamente which means the device is succesfully attached but is never seen in the vm The records in /var/log/messages: Sep 30 21:34:57 Balrog libvirtd: 21:34:57.288: warning : qemudParsePCIDeviceStrs:1411 : Unexpected exit status '1', qemu probably failed Sep 30 21:35:07 Balrog libvirtd: 21:35:07.803: warning : qemudParsePCIDeviceStrs:1411 : Unexpected exit status '1', qemu probably failed Sep 30 21:35:07 Balrog libvirtd: 21:35:07.805: error : qemuSecurityDACRestoreSecurityFileLabel:84 : cannot resolve symlink /dev/bus/usb/000/000: No such file or directory Sep 30 21:35:07 Balrog libvirtd: 21:35:07.806: warning : SELinuxRestoreSecurityFileLabel:371 : cannot resolve symlink /dev/bus/usb/000/000: No such file or directory Sep 30 21:35:07 Balrog libvirtd: 21:35:07.806: warning : qemudDomainDetachHostDevice:8930 : Failed to restore host device labelling from /var/log/libvirt/qemu/vm.log husb: open device 1.7 husb: config #1 need -1 husb: 3 interfaces claimed for configuration 1 husb: grabbed usb device 1.7 this one keeps repeating even after the device is detached that is today but yesterday showed only once or twice at each try and when detaching this came out: Warning: tried to detach unattached usb device USB Host Device Im using fedora 13 with: libvirt-0.8.2-1.fc13.x86_64 libvirt-client-0.8.2-1.fc13.x86_64 qemu-system-x86-0.12.5-1.fc13.x86_64 Can someone help me please Thanks

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[libvirt-users] Remote access form windows - Java bindings
by Gandhiraj Natarajan 30 Sep '10

30 Sep '10

Hi I am developing tool to collect information on XenServer which is on Opensuse 11. I am using libvirt-0.4.6.jar and and jna-3.2.4 jar files. I tried to connect from Remote system(Windows) to server, but could not get the connection object. Any configuration needs to be done for remote access ? conn = new Connect("xen+tcp://192.168.10.22/"); it shows the exception Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'virt': The specified module could not be found. at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:164) at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:237) at com.sun.jna.Library$Handler.<init>(Library.java:140) at com.sun.jna.Native.loadLibrary(Native.java:374) at com.sun.jna.Native.loadLibrary(Native.java:359) at org.libvirt.jna.Libvirt.<clinit>(Unknown Source) at org.libvirt.Connect.<clinit>(Unknown Source) at LibvirtCon.main(LibvirtCon.java:29) Help me Regards Gandhiraj Natarajan

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[libvirt-users] Copy the UUID into the image file
by Ahmad Kamil Abdul Hamid 30 Sep '10

30 Sep '10

Hi, Is it possible to copy the UUID defined in the XML domain file into the image file? For example, the UUID defined in ubuntu.xml can appear, say, under /proc/ directory of the ubuntu virtual machine? Thanks. Kamil.

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[libvirt-users] Importing images
by kevin gilbert 29 Sep '10

29 Sep '10

I have a dual boot machine and would love to import the Windows image into a VM. I've checked the documentation and Google and have not seen anything mentioned about this. Is it possible? Cheers, Kev

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[libvirt-users] network configuration for ipv6 setup
by Martin Jürgens 28 Sep '10

28 Sep '10

Hi, I am currently using IPv4 with the following network configuration which has worked fine for some months now: <network> <name>net0</name> <uuid>fa0c1c69-da82-1bef-fcb2-4c336bbexxxx</uuid> <forward dev='eth0' mode='route'/> <bridge name='virbr0' stp='on' forwardDelay='0' /> <ip address='78.47.xx.xx' netmask='255.255.255.xxx'> </ip> </network> The company hosting my server is now providing /64-IPv6-subnets to its customers - thus I'd like to take advantage of this and supply my guests with IPv6-subnets. Is it possible to do this without changing much of my setup (i.e. just changing some configuration files?)? I am using libvirt 0.6.3. Thanks, Martin

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[libvirt-users] Question about use libvirt
by Marcela Castro León 28 Sep '10

28 Sep '10

Hello: For a new system to develop, I need to know if I can use libvirt for to get (listen) the information that pass trought the lan (vlan) of the each VM. Thank you, very much. Marcela.

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[libvirt-users] Clock Sources under RHEL/Centos 5.x with KVM and libvirt
by Steven Ellis 27 Sep '10

27 Sep '10

I'm wondering under what circumstances the kvm-clock source is exposed to a guest. I've got a bunch of KVM servers running Centos 5.5 and some of the guests have are defaulting to jiffies or apic whilst some are picking up kvm-clock. These guests are a mix of 32bit and 64bit Centos 5.5. Looking at the virtual machine definition file there doesn't appear to be a difference between the guests with kvm-clock and those without. Any where else to look, or what configuration will expose kvm-clock to a guest. Steve -- Steven Ellis - Bulletin.Net Inc - http://www.bulletin.net

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[libvirt-users] Unable to change guest vnc port in libvirt
by mmv＠eholod.ru 25 Sep '10

25 Sep '10

Hi all! I set in XML <graphics type='vnc' port='5901'/> But Libvirt assign first free port from 5900 and take 5900. Anb block access to host console vnc (tightvnc-server-module). Console access need not frequently. I do # service libvirt-guests stop;killall Xorg; service libvirt-guests start But it dirty hack Im use Fedora 13 # env LANG=en_US virsh version Compiled against library: libvir 0.8.2 Using library: libvir 0.8.2 Using API: QEMU 0.8.2 Running hypervisor: QEMU 0.12.5 I prefer possiblity to define for libvirt different base port for |autoport|. 5910 for example. Somebody know solution?

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