KVM VM waits forever / stuck at kernel selection screen

If a KVM virtual machine has not been properly shutdown, it may wait forever at the boot up kernel selection screen for user input. You won’t see any output when trying to virsh console into the VM from the host. You have to fire up a remote VNC session in order to press enter. In …

QEMU on Haswell causes spurious MCE events

A few dozen times each day, the Xeon E3-1275 v3 CPU on my SuperMicro X10SLM-F board generates a Machine Check Event (MCE). The Linux kernel logs all MCEs in /var/log/syslog: mce: [Hardware Error]: Machine check events logged mce: [Hardware Error]: Machine check events logged CMCI storm detected: switching to poll mode CMCI storm subsided: switching …

LXC 1.0 Web Panel for Ubuntu 14.04

LXC is awesome! You can create and start your own virtual container with just 3 commands in Ubuntu 14.04. apt-get install lxc debootstrap lxc-templates lxc-create -t ubuntu -n demo lxc-start -n demo -d It doesn’t get any easier than this. There’s even a Boostrap-based fronted available: LXC Web Panel. Unfortunately, LXC Web Panel doesn’t work …