Network Policy

Official documentation: About network policy

Basics

1. Based on labeling or annotations
2. Empty label selector match all
3. Rules for allowing
   • Ingress -> who can connect to this POD
   • Egress -> where can this POD connect to
4. Rules
   • traffic is allowed unless a Network Policy selecting the POD
   • traffic is denied if pod is selected in policie but none of them have any rules allowing it
   • => You can only write rules that allow traffic!
   • Scope: Namespace

Demo Network Policies

Please check

• OVNKubernetes
• OpenShiftSDN

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Last update: October 12, 2021