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

My answer only applies for Node.js processes but may be relevant for some visitors who stumble to this question looking for a Node.js specific answer.

I had the same problem and relying on /proc/self/cgroup I created an npm package for solely this purpose — to detect whether a Node.js process runs inside a Docker container or not.

The containerized npm module will help you out in Node.js. It is not currently tested in Io.js but may just as well work there too.