How to determine if a process runs inside lxc/Docker?

Question

Is there any way to determine if a process (script) runs inside an lxc container (~ Docker runtime)? I know that some programs are able to detect whether they run inside a v

Answer 1

A concise way to check for docker in a bash script is:

#!/bin/bash
if grep docker /proc/1/cgroup -qa; then
   echo I'm running on docker.
fi