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

I have translated JJC's answer into ruby

def in_docker
  File.open('/proc/1/cgroup', 'rt') do |f|
    contents = f.read
    return contents =~ /docker/i || contents =~ /kubepod/i
  end
rescue StandardError => e
  p 'Local development'
  p e
  false
end