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[libvirt-users] error: Cannot open network interface control socket
by 何鑫 30 Oct '12

30 Oct '12

Hi all， I try to use gdb to debug libvirt's source code, but when I tend to create a domain with xml, it shows "error: internal error Network 'default' is not active", so I use the net-related commands as below."virsh # net-start defaulterror: Failed to start network defaulterror: Cannot open network interface control socket: Operation not permitted" Then I check my URI, which is "qemu:///session", because adding "sudo virsh". I try to change URI to "qemu:///system" by clicking "virsh # connect qemu:///system". The following logs shown below:virsh # connect qemu:///systemerror: Failed to connect to the hypervisorerror: Failed to connect socket to '/usr/local/libvirt/var/run/libvirt/libvirt-sock': No such file or directory Could you please tell me the reason? Thanks a lot! Corey

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[libvirt-users] Failed to connect socket to '/usr/local/libvirt/var/run/libvirt/libvirt-sock':
by 何鑫 30 Oct '12

30 Oct '12

Hi all, When I tend to use "virsh # connect qemu:///system", the debug info shown below:Failed to connect socket to '/usr/local/libvirt/var/run/libvirt/libvirt-sock': No such file or directory I use libvirt-bin's file "libvirt-sock" linking to the directory(usr/local/libvirt/var/run/libvirt) where virsh needs to search it, then the problem solved. But I need to debug libvirt with gdb tracing libvirt's source code, to avoid the effects of libvirt-bin, I should remove libvirt-bin. As a result, the symbolic of libvirt-sock is missed. Also I can't copy "libvirt-sock", because "cp: cannot open `/var/run/libvirt/libvirt-sock' for reading: No such device or address". So could you please give me some advise to add the file "libvirt-sock" after the source installation in ubuntu? Thanks a lot! Corey

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Re: [libvirt-users] virtual machine seems to run, but can't connect to it
by Douglas Russell 30 Oct '12

30 Oct '12

Thanks, I just figured it out. It turns out that my institution issues 192. addresses to MAC addresses it doesn't recognize. I had not realized this so assumed that the IP address was coming from the VM setup somehow. Onto the next problem now! But I'll post separately about that. Thanks for the help On 30 October 2012 04:11, Rudy Godoy <rudy(a)stone-head.org> wrote: > On Mon, Oct 29, 2012 at 10:53:29AM +0000, Douglas Russell wrote: > > I'm using ubuntu 12.04LTS > > > > I setup a bridged network: > > > > <snip> > > > > > It generates fine and starts up seemingly without a problem as well when > I > > run > > > > virsh start myvm > > > > I am then able to resolve it's IP with MDNS and try > > > > ping myvm.local > > > > So presumably the VM is running? But for some reason I can't communicate > > with it, I can't SSH in, I don't even get a response to my ping. > > > > What does displays: > # virsh dominfo myvm > > Can you connect to the console? > > # virsh console myvm > > regards > > > -- > Rudy Godoy > http://stone-head.org >

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[libvirt-users] libvirt and cgroups/blkio
by erkan yanar 29 Oct '12

29 Oct '12

Hi, is there a way to configure blkio via libvirt (xml)? Regards Erkan -- über den grenzen muß die freiheit wohl wolkenlos sein

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[libvirt-users] Re-sizing qcow2 images
by Chandana De Silva 29 Oct '12

29 Oct '12

Hello All, I am using Centos 6.3 with libvirt 0.910 and qemu-kvm 0.12 I had to resize a qcow2 disk, and came across several issues; I used this command to resize the image: sudo -i /usr/bin/qemu-img /var/lib/libvirt/images/mydisk.img resize +100G . The disk is attached using virtio. I then tried to use parted from within the guest to resize the partition. The first problem was that the guest os did not see the increase disk size. Is there something that I need to do, to force the guest to see the higher disk size ? I got round this by re-starting the guest, but it would be better if there is some way to force the guest to see the new size. The second problem was that parted gave an error : Error: Filesystem has an incompatible feature enable. Some reading showed that this was caused by the "resize_inode" feature on the file system. I removed this feature using debugfs, and rans fsck, but parted still gave the same error: Error: Filesystem has an incompatible feature enable. I would like some advice on how this is supposed to be done. Thanks in advance. Chandana

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[libvirt-users] Re-sizing qcow2 images
by Chandana De Silva 29 Oct '12

29 Oct '12

Hello Hristo, Thanks for your comments. I was really looking for an on-line resizing tool. Eric Blake's later response seem to cover this. Regards Chandana On 30/10/12 03:00, Hristo Deshev<hristo(a)deshev.com> > For my resizes I use libguestfs's virt-resize [1] tool. It's been > working flawlessly so far -- it resizes both the image file/device and > partitions inside that image. I can't recommend it enough. > > Best, > Hristo

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[libvirt-users] virt-manager fails to connect to dbus
by sean darcy 29 Oct '12

29 Oct '12

On Fedora 17 updated: virt-manager-0.9.4-2.fc17.noarch libvirt-0.10.2.1-1.fc17.x86_64 after a reboot, virt-manager no longer starts. Used to! virt-manager & [1] 1676 [root@sixcore ~]# (virt-manager:1676): GConf-WARNING **: Client failed to connect to the D-BUS daemon: Failed to connect to socket /tmp/dbus-0v4E2bXlqf: Connection refused Traceback (most recent call last): File "/usr/share/virt-manager/virt-manager.py", line 386, in <module> main() File "/usr/share/virt-manager/virt-manager.py", line 321, in main config = virtManager.config.vmmConfig(appname, appversion, ui_dir) File "/usr/share/virt-manager/virtManager/config.py", line 98, in __init__ self.conf.add_dir(self.conf_dir, gconf.CLIENT_PRELOAD_NONE) GError: No D-BUS daemon running [root@sixcore ~]# systemctl status dbus.service dbus.service - D-Bus System Message Bus Loaded: loaded (/usr/lib/systemd/system/dbus.service; enabled) Active: active (running) since Mon, 29 Oct 2012 16:53:41 -0400; 2s ago Process: 1669 ExecStartPre=/bin/rm -f /var/run/messagebus.pid (code=exited, status=0/SUCCESS) Process: 1666 ExecStartPre=/bin/dbus-uuidgen --ensure (code=exited, status=0/SUCCESS) Main PID: 1672 (dbus-daemon) CGroup: name=systemd:/system/dbus.service └ 1672 /bin/dbus-daemon --system --address=systemd: --nofork --systemd-activation Any help appreciated, sean

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[libvirt-users] libvirt and thin provisionned LVM
by Daniel Berteaud 29 Oct '12

29 Oct '12

Hi there. I'm trying to use thin provisionned LVM for som eguests, and I'm having a problem. Until now, I use LVM pool with success. Here's my pool definition: <pool type='logical'> <name>data</name> <uuid>7f18e030-9d2d-805e-c65f-d12d0681b0a9</uuid> <capacity unit='bytes'>0</capacity> <allocation unit='bytes'>0</allocation> <available unit='bytes'>0</available> <source> <name>data</name> <format type='lvm2'/> </source> <target> <path>/dev/data</path> <permissions> <mode>0700</mode> <owner>-1</owner> <group>-1</group> </permissions> </target> </pool> Everything is working, until I create a thin privisionned pool like this: lvcreate --thin data/pool -L 50G Now, as soon as this is created, I cannot refresh my pool from libvirt POV: LANG=C_ALL virsh pool-refresh data error: Failed to start pool sys error: erreur interne Child process (/sbin/vgchange -aln vg_gerard) status unexpected: exit status 5 If I remove this LV, everything is working again. I'm using libvirt 0.9.10, the default one in CentOS 6.3 (x86_64). Has anybody managed to get it working ? Is this something fixed in more recent release ? Regards, Daniel -- Daniel Berteaud FIREWALL-SERVICES SARL. Société de Services en Logiciels Libres Technopôle Montesquieu 33650 MARTILLAC Tel : 05 56 64 15 32 Fax : 05 56 64 15 32 Web : http://www.firewall-services.com

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[libvirt-users] virtual machine seems to run, but can't connect to it
by Douglas Russell 29 Oct '12

29 Oct '12

I'm using ubuntu 12.04LTS I setup a bridged network: # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet dhcp auto br0 iface br0 inet dhcp bridge_ports eth0 bridge_stp off bridge_fd 0 bridge_maxwait 0 Seems to work. Then I created a virtual machine using Ubuntu's vmbuilder tool like so: vmbuilder kvm ubuntu \ --suite 'precise' \ --flavour 'virtual' \ --arch 'amd64' \ --dest 'myvm' \ --hostname 'myvm' \ --mem '2048' \ --rootsize '4096' \ --swapsize '1024' \ --mirror 'http://archive.ubuntu.com/ubuntu' \ --name 'MyName' \ --user 'myuser' \ --pass 'password' \ --bridge 'br0' \ --addpkg acpid \ --addpkg vim \ --addpkg openssh-server \ --addpkg avahi-daemon \ --libvirt 'qemu:///system' \ --ip '192.168.0.100' It generates fine and starts up seemingly without a problem as well when I run virsh start myvm I am then able to resolve it's IP with MDNS and try ping myvm.local So presumably the VM is running? But for some reason I can't communicate with it, I can't SSH in, I don't even get a response to my ping. Any ideas? I'd be happy to provide further information. Thanks.

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[libvirt-users] Health check
by Ali Nikzad 28 Oct '12

28 Oct '12

Hi, I want to write an application that Health checks a virtual machine to see whether the VM is up and running or not. I am using ESXi as my hypervisor. Are there any libvirt API functions that I can use for this purpose? Regards, Ali

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