Cilium Networking Cheat Sheet

eBPF-based networking with Cilium. Service mesh, network policies, observability, and security.

Last Updated: December 24, 2025

eBPF Fundamentals

What is eBPF, kernel-level networking

Key concept 1: ebpf fundamentals
Comprehensive explanation and practical examples for implementing ebpf fundamentals in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: ebpf fundamentals
Comprehensive explanation and practical examples for implementing ebpf fundamentals in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: ebpf fundamentals
Comprehensive explanation and practical examples for implementing ebpf fundamentals in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: ebpf fundamentals
Comprehensive explanation and practical examples for implementing ebpf fundamentals in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: ebpf fundamentals
Comprehensive explanation and practical examples for implementing ebpf fundamentals in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: ebpf fundamentals
Comprehensive explanation and practical examples for implementing ebpf fundamentals in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Installation

Install Cilium, CNI plugin

Key concept 1: installation
Comprehensive explanation and practical examples for implementing installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: installation
Comprehensive explanation and practical examples for implementing installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: installation
Comprehensive explanation and practical examples for implementing installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: installation
Comprehensive explanation and practical examples for implementing installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: installation
Comprehensive explanation and practical examples for implementing installation in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Network Policies

L3-L7 policies, DNS-based

Key concept 1: network policies
Comprehensive explanation and practical examples for implementing network policies in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: network policies
Comprehensive explanation and practical examples for implementing network policies in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: network policies
Comprehensive explanation and practical examples for implementing network policies in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: network policies
Comprehensive explanation and practical examples for implementing network policies in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: network policies
Comprehensive explanation and practical examples for implementing network policies in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: network policies
Comprehensive explanation and practical examples for implementing network policies in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Service Mesh

Sidecar-less mesh, Envoy integration

Key concept 1: service mesh
Comprehensive explanation and practical examples for implementing service mesh in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: service mesh
Comprehensive explanation and practical examples for implementing service mesh in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: service mesh
Comprehensive explanation and practical examples for implementing service mesh in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: service mesh
Comprehensive explanation and practical examples for implementing service mesh in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: service mesh
Comprehensive explanation and practical examples for implementing service mesh in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Observability

Hubble, flow logs, metrics

Key concept 1: observability
Comprehensive explanation and practical examples for implementing observability in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: observability
Comprehensive explanation and practical examples for implementing observability in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: observability
Comprehensive explanation and practical examples for implementing observability in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: observability
Comprehensive explanation and practical examples for implementing observability in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: observability
Comprehensive explanation and practical examples for implementing observability in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 6: observability
Comprehensive explanation and practical examples for implementing observability in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.

Security

Transparent encryption, identity

Key concept 1: security
Comprehensive explanation and practical examples for implementing security in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 2: security
Comprehensive explanation and practical examples for implementing security in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 3: security
Comprehensive explanation and practical examples for implementing security in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 4: security
Comprehensive explanation and practical examples for implementing security in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
Key concept 5: security
Comprehensive explanation and practical examples for implementing security in production environments. Includes best practices, common pitfalls to avoid, and performance considerations.
💡 Pro Tip: Master the fundamentals of Cilium Networking first before diving into advanced features. Practice with real-world projects and refer to this comprehensive cheatsheet for quick reference and best practices.
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