Some Docker Basics

get container PID from host point of view

docker inspect -f '{{.State.Pid}}' b7b9bbce4a8e
> 7053

get PID inside of container namespace

more /proc/7053/status | grep "NSpid" # 7053 is the container PID from host point of view
> NSpid:	7053	1                 # inside of container namepsaces. 7053 mapped to 1

Namespaces

get all namepsaces on the host

https://github.com/Intika-Linux-Namespace/Namespace-Lister/blob/master/listns.py

UTS Namespace

UTS Namespace is used to isolate node name and domain name

Developmment

install GoDep

sudo apt-get install go-dep
dep init