oam/knowledge base/get the environment of processes running in containers.md

Get the environment of processes running in containers

Table of contents

1. TL;DR
2. Further readings
3. Sources

TL;DR

# From a shell inside the container.
cat "/proc/${PID}/environ"

# In Kubernetes.
kubectl exec 'pod-name' -- cat '/proc/1/environ'

# This only works if the onboard `ps` is **not** the one from Busybox.
ps e -p "$PID"

Further readings

• Kubernetes
• kubectl

Sources

All the references in the further readings section, plus the following:

• Get the environment variables of running process in container