Heartbeat is sort of deprecated and the new “industry standard” will be pacemaker and OpenAIS. They’re very different animals, so be careful to read their roles. Pacemaker is a ‘cluster resource manager’ — the part you asked about in your original question. It can use OpenAIS or Heartbeat as the network layer to manage a … Read more
Well thought-out question! I’d go with Method 2, but that’s more of a personal preference. To me, the Method 2 Cons aren’t much of an issue. I don’t see the host OS outgrowing its 5-10GB partition, unless you start installing extra stuff on it, which you really shouldn’t. For the sake of simplicity and security, … Read more
What version of QEMU-KVM are you running? We’ve seen this issue on versions 0.12.3 and down, but it doesn’t seem to be too much of a problem on 0.12.4. Also, check to see if the screensavers are running. If you’re using the VNC connection then it may be running there, and the CPU utilization won’t … Read more
While this was an MTU problem, it turns out that it had nothing to do with the MTU settings on any of the component devices. As I showed in the original question, the host bridge, host tun interface, and guest interface all had the same MTU setting (9000 bytes). The actual problem was a libvirt/kvm … Read more
There was a vCPU pinning in the XML which doesn’t appear in virt-manager -.- I removed it via for i in {0..63}; do sudo virsh vcpupin $kvmdomain $i r –config; done and removed the line in the XML-file via sudo virsh edit <domain> After that I restarted the guest.
Easiest way to assign NICs to the guest is to leave them unconfigured in the host, and use macvtap passthrough mode for the guest NICs. Mind you, without additional, more complex settings, this will block VM live migration. Settings: <devices> … <interface type=”direct”> <source dev=’eth0′ mode=”private”/> </interface> </devices> Or you can go for a full … Read more
This is the forwarding delay for interfaces joining the bridge. It’s how long it’ll be before the interface will be able to do anything. . During this time the bridge will be discovering other bridges and checking that no loops are created. For a better description and the reason for it you need to read … Read more
This feature was requested a long time ago. Now libvirt supports it by providing two new commands: domifaddr and net-dhcp-leases Usage: domifaddr <domain> [interface] [–full] [–source lease|agent] Example outputs: virsh # domifaddr f20 –source agent Name MAC address Protocol Address ——————————————————————————- lo 00:00:00:00:00:00 ipv4 127.0.0.1/8 – – ipv6 ::1/128 eth0 52:54:00:2e:45:ce ipv4 10.1.33.188/24 – – … Read more
Most current hypervisors that run on Intel hardware use CPUID leaves 0x40000000 et seq. to pass information about the hypervisor from host to guest. KVM, Xen, VMware and Hyper-V all use this method. This is in addition to the hypervisor feature flag set in CPUID leaf 0x1, which indicates that the machine is a virtual … Read more
First, create a raw image of the required size. I’ll assume 10G is enough. Using seek creates a sparse file, which saves space. dd if=/dev/null of=example.img bs=1M seek=10240 Next, create a filesystem on it. mkfs.ext4 -F example.img (Note that you need the -F option for mkfs.ext4 to operate on a file as opposed to a … Read more