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[libvirt-users] Multicast with KVM NAT networking
by james pedia 31 Oct '12

31 Oct '12

I used omping to test multicast between 2 KVM VMs under same physical host, and it is not working in terms of multicast (normal pings/ssh works between these 2 VMs). How to enable multicast for KVM guests running under NAT networking mode under the same physical host? Per some doc from RedHat, it would be very slow using NAT with multicast for KVM. I have to use virbr0/NAT mode since I am using wireless. So although it would be slow, it should still work, but this is not the case for me.

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[libvirt-users] Attaching storage to a virtual machine
by Douglas Russell 31 Oct '12

31 Oct '12

I am slightly lost trying to attach some storage to a functioning virtual machine. If this where a real machine, I would simply be trying to mount a LVM volume. I have found a lot of documentation about adding storage pools, but I'm unsure if that is actually what I should be doing. Is that just for storage of the virtual machines themselves? Once I'd added my LVM volume group to virsh I could see no way of then assigning one volume of that to be offered as a logical volume to one particular virtual machine. I've also seen this: http://docs.fedoraproject.org/en-US/Fedora/13/html/Virtualization_Guide/sec… Looks like I could use that to assign one of the LVM volumes in my LVM volume group to the VM. If anyone could explain the different function of these two techniques and which sounds applicable I would be most grateful. Thanks, Douglas

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[libvirt-users] error : virPidFileAcquirePath:345 : Failed to acquire pid file '/home/corey/.libvirt/libvirtd.pid': Resource temporarily unavailable
by 何鑫 31 Oct '12

31 Oct '12

Hi all, When I try to start libvirtd, using "libvirtd -d", error notification shown below:error : virPidFileAcquirePath:345 : Failed to acquire pid file '/$HOME/.libvirt/libvirtd.pid': Resource temporarily unavailable Using "libvirtd -v", show: "libvirtd: error: Unable to obtain pidfile. Check /var/log/messages or run without --daemon for more info." The file "libvirtd.pid" only contains "2010" without any other infomation. I have checked that libvirtd has been installed in "/libvirt/sbin" with binary format by self-compiled. So how can I solve the problem? Or how to start libvirtd? Meanwhile, virsh can't search "libvirt-sock", because the libvirtd is not started successfully. Thanks a lot! Corey

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[libvirt-users] overriding shutdown for LXC
by erkan yanar 31 Oct '12

31 Oct '12

Moin Im using lxc@libvirt for LXC-applicationcontainer. Works quite nice for now, beside shutting down the container, which is not implemented. Hooks don't help here, as far as I found out. Is there a way to override/define the shutdown function? Regards Erkan -- über den grenzen muß die freiheit wohl wolkenlos sein

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[libvirt-users] overriding shutdown for LXC
by erkan yanar 31 Oct '12

31 Oct '12

Moin Im using lxc@libvirt for LXC-applicationcontainer. Works quite nice for now, beside shutting down the container, which is not implemented. Hooks don't help here, as far as I found out. Is there a way to override/define the shutdown function? Regards Erkan -- über den grenzen muß die freiheit wohl wolkenlos sein

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Re: [libvirt-users] libvirt-users Digest, Vol 34, Issue 35
by Chandana De Silva 30 Oct '12

30 Oct '12

You _can_ do NAT. Set up a different libvirt network on each machine, like this; 10.128.80.65 will have a libvirt network 192.168.65.0/24 10.128.80.66 will have a libvirt network 192.168.66.0/24 Set up each of these networks as routed networks. Now set up routing/iptables rules on each host to send traffic to each other, and NAT into the internal routed network On 31/10/12 01:46, libvirt-users-request(a)redhat.com wrote: > Message: 1 > Date: Tue, 30 Oct 2012 07:10:55 +0000 > From: ??<zhang_zhang(a)live.com> > To:<libvirt-users(a)redhat.com> > Subject: [libvirt-users] Can VMs on different machines communicate > with each other without IP? > Message-ID:<BLU172-W4666B32A6C9C8E75734C67FC620(a)phx.gbl> > Content-Type: text/plain; charset="gb2312" > > > Dear all, > I confront a somehow strange situation: > I have two machines configured with ip 10.128.80.65 and 10.128.80.66 respectively. Each has several VMs running on it. The problem is that I have no more ip ( such as 10.128.80.67...) to allocate to VMs, but VMs need to communicate with each other even when they are on different machines. > Two network options exist: NAT and bridge. > 1) NAT > But VMs on different machine cannot communicate with each other. > 2)bridge > But there is no more ip for vm to be bridged to host machine. > Is there any other way to work around this problem? > > > many thanks!

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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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