PID mapping between docker and host

Question

How docker namespace is different from Host namespace and how the pid can be mapped between these two? Can anyone give me an idea that helps to make easy way of mapping pid\'s b

Answer 1

You can find the mapping in /proc/PID/status file. It contains a line like:

NSpid:  16950   24

Which means that 16950 on the host is 24 inside the container.