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Cilium is an open-source networking project that provides networking and security capabilities for containerized applications, microservices, and virtual machines.

Recently Cilium launched a great website about eBPF called ebpf.io. It serves a similar purpose to this list, with an introduction to eBPF.

Reference Documentation

Website

Official website of Cilium, originally created by [Isovalent](https://isovalent.com/).

Official GitHub repository

GitHub repository of the Cilium project.

A cookbook of installing Cilium on AWS EKS

Multiple ways to install Cilium in EKS.

Cilium Certified Associate Study Guide

Study guide to help the Cilium community prepare for the CNCF's Cilium Certified Associate (CCA) Exam.

Cilium related projects

Cilium

A networking plugin for various container runtimes such as Kubernetes, Docker, and Mesos. It leverages Linux kernel features like eBPF to provide fast and secure networking and load balancing for applications.

eBPF

Technology that allows for dynamic, programmable packet filtering and network analysis in the Linux kernel.

Cilium Proxy

High-performance HTTP, TCP, and gRPC proxy that can be automatically injected into Kubernetes pods. It provides features like load balancing, health checking, and L7 visibility.

Cilium Cluster Mesh

Securely connects multiple Kubernetes clusters together using encrypted tunnels. It enables seamless communication and service discovery across clusters while maintaining strong security boundaries.

Hubble

Network visibility and monitoring tool built by the Cilium community. It provides real-time visibility into network traffic, allowing operators to gain insights into application behavior, troubleshoot connectivity issues, and enforce network security policies.

Cilium Operator

Kubernetes operator that simplifies the deployment and management of Cilium within a Kubernetes cluster. It automates tasks such as deploying Cilium agents, configuring eBPF policies, and handling upgrades.

Tetragon

Runtime security enforcement and observability tool.

Cilium Mesh

Connects Kubernetes workloads, virtual machines, and physical servers running in the cloud, on-premises, or at the edge.

NetworkPolicy Editor

Create, visualize, and share Kubernetes network policies.

Prometheus & Grafana for Cilium

Collects metrics from Cilium and stores them in Prometheus for analysis and alerting.

Cilium Helm Chart

Helm chart that can be used to deploy Cilium on Kubernetes.

Hubble adaptor for OpenTelemetry

Enables exporting Hubble flow data using OpenTelemetry collector.

Packet, where are you?

eBPF-based Linux kernel networking debugger.

Coroot

Turns telemetry data into actionable insights, helping you identify and resolve application issues quickly.

Pixie

Instant Kubernetes-native application observability.

caretta

Instant K8s service dependency map, right to your Grafana.

Netreap

Cilium controller implementation for Nomad.

Gloo Network

Enables Cilium-CNI powered by eBPF to provide networking, packet filtering, and observability for modern applications.

Bpfilter instead of iptables for routing

Bpfilter offers a new approach to packet filtering in Linux.

Inter-node traffic control

Policies that are applicable to the whole cluster (non-namespaced) and provide you with the means to specify nodes as the source and target.

BPF and XDP Reference Guide

Guide from the Cilium project.

Why is the kernel community replacing iptables with BPF?

Blog post by Cilium on the motivations behind eBPF and bpfilter, with examples and links to other projects using eBPF and bpfilter.

Bpfilter: Linux firewall with eBPF sauce

Slides from a talk by Quentin Monnet with a background on eBPF and comparing bpfilter to iptables.

Cilium: Networking & Security for Containers with BPF & XDP

Featuring a load balancer use case.

Cilium: Networking & Security for Containers with BPF & XDP

[Video](https://www.youtube.com/watch?v=TnJF7ht3ZYc&list=PLkA60AVN3hh8oPas3cq2VA9xB7WazcIgs).

Cilium: Fast IPv6 container Networking with BPF and XDP

Fast IPv6 container networking with BPF and XDP.

Cilium: BPF & XDP for containers

BPF & XDP for containers.

Learning ebpf book

Learning eBPF, published by O'Reilly! Here's where you will find a VM config for the examples.

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Articles and Presentations

eBPF log analytics in your Kubernetes cluster

Leverage Cilium's Tetragon to capture eBPF-based file access logs and send them to Parseable for alerting and further analytics.

Introduction to Cilium

A livestream covering all things related to eBPF and Cilium presented by Isovalent's Thomas Graf & Liz Rice.

Cilium CNI

Comprehensive deep dive guide for networking and security enthusiasts.

Cilium for Kubernetes networking

Why we use it and why we love it.

A generic introduction to Cilium

Generic introduction to Cilium.

A podcast interviewing Thomas Graf

Ivan Pepelnjak interviewing Thomas, October 2016, on eBPF, P4, XDP, and Cilium.

How eBPF streamlines the service mesh

Explore how eBPF allows us to streamline the service mesh, making the data plane more efficient and easier to deploy.

From Amazon VPC CNI to Cilium with zero downtime

Migrate to Cilium from Amazon VPC CNI with zero downtime.

Cilium CNI and OKE on Oracle Cloud

Kubernetes networking with Cilium CNI and OKE on Oracle Cloud.

Cilium in Azure Kubernetes Service (AKS)

Configure Azure CNI powered by Cilium in Azure Kubernetes Service (AKS).

eCHO News NEWSLETTER

eCHO news in a bi-weekly wrap-up of all things eBPF and Cilium.

Exploring eBPF and XDP

Basic example of how to get started with XDP.

eBPF - Rethinking the Linux Kernel

eBPF JavaScript-like capabilities to the Linux Kernel.

Learn how Tetragon can stop CVEs with YAML

Prevent overlayfs privilege escalation on Ubuntu kernels with YAML (bpf).

Cilium + Istio

Quick tour of Cilium 1.14 with Istio.

Cilium: Decoding the packet path with security groups for pods in EKS

Decoding the packet path with security groups for pods in EKS.

Cilium mutual auth … DIY

Quick run-through on setting up Cilium, mtls on a self-managed Kubernetes cluster.

Istio service mesh with ALB in EKS

Install Cilium in a BYOCNI mode seamlessly and leverage eBPF functionality as compared to iptables.

Kubernetes LoadBalance service using Cilium BGP control plane

Walk through the process of creating Cilium-based support for load balancer services in a minimal K3s Kubernetes cluster.

eBPF-based networking with Cilium

What is it and what can it do?

Deploying Red Hat OpenShift with Cilium

Tutorial on deploying Cilium and Red Hat OpenShift.

Setting up EKS Amazon clusters, adding Cilium to projects using Terraform and Helm, supporting GitOps, and using Karpenter for efficient resource utilization and cost savings

Architecting for resilience: Crafting opinionated EKS clusters with Karpenter & Cilium Cluster Mesh.

Kubernetes Gateway API with Cilium

Guidance on how to effectively configure Cilium for setting up the Gateway API in Kubernetes environments.

How to migrate from Red Hat OpenShiftSDN/OVN-Kubernetes to Cilium

Step-by-step process of migrating from OpenShiftSDN or OVN-Kubernetes to Cilium.

Setup basic L4 load balancing with Cilium CNI and Ubuiqiti Edge Router

Setting up basic L4 load balancing with Cilium CNI and Ubuiqiti Edge Router.

Community Events

CiliumCon

Full-day co-located event for Cilium users, contributors, and new community members.

Isovalent Security Summer School 2023

Virtual Security Summer School with hands-on labs. Learn how Cilium, Tetragon, and Hubble help improve Kubernetes security.

Isovalent's cilium related events

Events featuring diverse voices, innovative companies, and big ideas.

Hands on Contents

Isovalent library for Cilium

Find videos, case studies, blogs, books, labs, and analyst reports.

Cilium Learning Tracks

Tracks for cloud network engineers, security professionals, platform engineers, platform ops (service mesh), and cloud architects.

K0S Cilium Playground

Full bash-based k0s Cilium Clustermesh enabled playground.

Podcast: Kubernetes Unpacked Podcast

Kubernetes Unpacked 022: Kubernetes networking and abstraction with Cilium and eBPF.

From Zero to Cluster Mesh: Installing and Configuring Cilium CNI on Kubernetes

How to install and configure the Cilium CNI and enable its advanced cluster mesh feature across Kubernetes clusters.

Cilium and SPIRE integration

Tutorials about Cilium and SPIRE integration.

Cilium Network policies Library

Community curated list of system and network policy templates for KubeArmor and Cilium.

Kyverno policies for Cilium Network Policies

Examples of Kyverno policies for controlling the creation of Cilium network policies.