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[libvirt-users] username and passwd after create VM from XML dump
by Yuanzhen Gu 07 Aug '14

07 Aug '14

Good afternoon guys, I created the VM from XML dump, # virsh create vm4.xml and # virsh list I can see the VM running, and I know the ip address for the VM, but how can I know the username and password to login the running VM, which is created from XML dump? is there any place to edit and add the username and password in guest domain XML ? thanks a lot!! Best, Yuanzhen

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[libvirt-users] Ubuntu Trusty: failed to create VM due to permission denied
by Jianfeng Tang 07 Aug '14

07 Aug '14

> Hi, libvirt experts, I used libvirt to create a VM and used backing store to a local file. It works fine until I installed my box to Unbuntu Trusty (14.04). I got the following errors when I tried to start the VM: Could not open backing file: Could not open <path to my backing file>: Permission denied However, if I moved my image file (not base image) to default location /var/lib/libvirt/images. It works. It seems something related to selinux. However, my box seems not have selinux installed at all. Anyone knows how to fix this? Thanks, ~Frank >

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[libvirt-users] libvirt external disk-only snapshot will pause the VM?
by Yuanzhen Gu 07 Aug '14

07 Aug '14

Hello folks, If I give command to take external disk-only live snapshot, such as # virsh snapshot-create-as vm1 snapshot_vm1 --disk-only will the guest OS be paused or suspend while the snapshot being taken? Thanks very much! Best, Yuanzhen

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[libvirt-users] error configuring a public bridge --> uvt-kvm: error: libvirt domain 'newtest' has no NIC MACs available.
by Jordi Arjona 06 Aug '14

06 Aug '14

Hi all, First at all, excuse if this is not the right place for sending this email. I'm using ubuntu 14.04 server edition and i'm trying to deploy some virtual machines in a server in such a way that they are visible in the same network that the host machine. The tools I'm using are the uvtool package and libvirt. The error I'm getting is the following: "uvt-kvm: error: libvirt domain 'newtest' has no NIC MACs available." Here I'm providing the quickest way (I think) of reproducing my problem. The steps to follow would be: 1) Creating a bridge. This is my /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback auto em1 iface em1 inet manual auto br0 iface br0 inet static address 9.109.124.62 network 9.109.124.0 netmask 255.255.255.0 broadcast 9.109.124.255 gateway 9.109.124.1 #iface br0 inet dhcp bridge_ports em1 bridge_stp off bridge_fd 0 bridge_maxwait 0 dns-search xx.xx.xx.xx dns-nameservers 192.168.122.1 9.0.146.50 9.0.148.50 2) downloading a trusty tahr cloud image and run it uvt-simplestreams-libvirt sync release=precise arch=amd64 uvt-kvm create test release=trusty 3) duplicate the xml generated when running the machine in order to modify the network interface by the bridge one. In the XML I also remove the uuid and change the VM name. sudo mv /etc/libvirt/qemu/test.xml /etc/libvirt/qemu/test2.xml In test 2 the most relevant change is replacing <interface type='network'> <mac address='52:54:00:86:7a:31'/> <source network='default'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> by <interface type='bridge'> <source bridge='br0'/> <model type='virtio'/> </interface> 4) Once I have my new XML, I define and start the new machine uvt-kvm destroy test virsh undefine test sudo virsh define /etc/libvirt/qemu/test2.xml virsh start newtest (newtest is the name provided in test2.xml) 5) Up to this point everything seems to be fine, but if i run a wait command i get the error uvt-kvm wait newtest --insecure uvt-kvm: error: libvirt domain 'newtest' has no NIC MACs available. I have checked the xml generated when defining newtest and there is a MAC in there, so it is not a problem generating a MAC address. Also the interface br0 is visible for virsh: virsh iface-list Name State MAC Address --------------------------------------------------- br0 active xx:xx:xx:xx:xx:xx lo active 00:00:00:00:00:00 I have been googling for a while and couldn't find anything but this: http://pastebin.com/em0hmy4t That tries something similar and falls in the same error. Any help will be very much appreciated. It is the first time i send anything to one of this mail lists, so, please, if you need me to provide any other info, tell me. Thanks! Jordi

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[libvirt-users] How to import libvirt library in Java
by Restituto Marcus Arevalo 05 Aug '14

05 Aug '14

Hi, I am trying to get the CPU/Memory usage of the VMs in KVM using Java. But before I get to start coding, I have no idea where to get the libvirt library and how to import it in Java. Does anyone know where I can get it and how I'll be able to use its library? Thanks regards, Marco

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Re: [libvirt-users] [libvirt] help
by Michal Privoznik 05 Aug '14

05 Aug '14

[Dropping libvirt-announce list] On 05.08.2014 11:47, Himanshu Sharma wrote: > Dear Team, > Greetings!! > > I'm testing libvirt with VMware ESXi. I'm able to connect to VMware ESXi with libvirt driver but not able to connect it through "Virtual Machine manager" GUI also not able to run virt-clone command inturn to clone ESXi VM. Can you please guide me how to do so? > The virt-manager does not support ESX yet. It merely supports QEMU/KVM, XEN and LXC. And for the virt-clone issue: 1) "computer broken" is usually not much descriptive. Is there any error message you are seeing? What behavior are you experiencing? 2) virt tools have a separate mailing list: http://www.redhat.com/mailman/listinfo/virt-tools-list Try asking there. Usually it's considered bad practice to repeat your question every 5 minutes, crosspost it over several mailing lists (even libvirt-announce which is not user support channel but a low traffic list for announcements as it name suggests) or forward the e-mail that is irrelevant (Welcome to the list). Michal

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[libvirt-users] libvirt and lvm thin pool
by Vasiliy Tolstov 04 Aug '14

04 Aug '14

Hi all. I'm using libvirt 1.2.6 I want to use lvm storage for my virtual machines. But i want to use new lvm2 feature - thin pool. How can i do that in libvirt? If libvirt can't create it via pool xml, does (and how) to use this setup under libvirt? -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

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[libvirt-users] "virsh list" doesn't show correct state in case of no reply from Guest OS
by Koji Inami 04 Aug '14

04 Aug '14

Hello, we were facing a bit of problem that "virsh list" command didn't show correct state, and I report it. I'm talking about a following message, for example. [root@server ~]# virsh list Id Name State ---------------------------------------------------- 1 rhel65 running The command showed "running" in spite of no reply from a Guest OS, while qemu process was dumping a corefile. So I guess the process was dying at that time. I'm sure the command shouldn't show "running" state because the process was not running. I believe that "crushed" or "shut off" are better than "running" in virDomainState. Please see: http://libvirt.org/html/libvirt-libvirt.html I'd like to hear your thinking. Best Regards, Koji

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[libvirt-users] virtio hotplug in CentOS 5.10 guest incomplete
by Dennis Jacobfeuerborn 02 Aug '14

02 Aug '14

Hi, I just tried to hot-plug a virtio disk to a CentOS 5.10 guest that runs on a CentOS 6.5 host. The Problem is that while the device shows up under /sys/ the corresponding device node does not: /sys/devices/virtio-pci/virtio0: bus device driver modalias net:eth0 power status subsystem uevent vendor /sys/devices/virtio-pci/virtio1: block:vda bus device driver modalias power serial status subsystem uevent vendor /sys/devices/virtio-pci/virtio2: bus device driver modalias power status subsystem uevent vendor So virtio0 is eth0 and virt1 is vda but virtio2 has no device associated with it. Any ideas why the system doesn't pick up the device all the way? Regards, Dennis

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[libvirt-users] XP and virtio
by Mauricio Tavares 01 Aug '14

01 Aug '14

So I need to create a XP vm. I am using lvm logical volumes for its disk, so I am using virtio. I got the iso in http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/bin/images/, but how do I feed it to the XP install? I did try to mount it as a floppy and it hung there on "please wait"; I guess that means it did not like a 70MB iso as its floppy. But it also does not seem to want to look for the drivers if I mount the .iso as a CD. What else can I try?

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