Implementing Kubernetes Egress Traffic Control with Squid Proxy
By
fsmunoz
Pure flour-power. Hearty enough to carry you through lunch.
Summary
This technical article explains how to implement Kubernetes egress control using Squid proxy as a lightweight alternative to more complex solutions. The author discusses the common neglect of egress traffic monitoring in Kubernetes clusters compared to ingress, and provides a practical approach using Squid proxy with NetworkPolicy to gain visibility and control over outbound traffic. The article serves as an introduction to understanding why egress control is important and how to implement basic monitoring without heavy infrastructure.
Key quotes
· 3 pulledKubernetes ingress gets a lot of attention – Gateway API, Ingress controllers, service meshes – compared with the Egress, mostly ignored until someone asks 'what exactly is our cluster talking to?'
This is a (very) simple approach to that, using the venerable Squid proxy and a NetworkPolicy, without reaching for heavier machinery (but beginning to understand why we would).
This is the overview of t
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