how to find out if running inside KVM guest
Solution 1:
Grep dmesg
, there should be at least one line containing kvm
. On my machines:
[ 0.000000] kvm-clock: cpu 0, msr 0:5dd801, boot clock
[ 0.000000] kvm-clock: cpu 0, msr 0:1023801, primary cpu clock
Alternativly check /proc/cpuinfo
, it contains a line:
model name : QEMU Virtual CPU version 0.9.1
But, the problem is: You can't be sure you are an KVM guest (on top of QEMU) or only a QEMU-Guest.
Solution 2:
You can check if imvirt or virt-what which are available for several Linux distros, including Ubuntu, can help you.
Solution 3:
systemd-detect-virt
returns on this Ubuntu 18.04 KVM setup:
kvm
and on my host:
none
See also: https://unix.stackexchange.com/questions/89714/easy-way-to-determine-virtualization-technology
Tested on an Ubuntu 18.04 host.