Cilium v1.10 Documentation

### Cilium v1.10 Documentation Summary Cilium v1.10 documentation provides comprehensive guidance on deploying, configuring, and managing Cilium, a Kubernetes network policy controller that uses eBPF for efficient networking and security enforcement. Below is a structured summary of the key sections and information: --- #### **1. Introduction to Cilium & Hubble** - **What is Cilium?** Cilium is a modern network policy, observability, and security platform designed for Kubernetes clusters. It uses eBPF (extended Berkeley Packet Filter) to enforce network security policies at the kernel level. - **What is Hubble?** Hubble is the observability component of Cilium, providing visibility into network traffic and security events. - **Why Cilium & Hubble?** Cilium offers a powerful combination of networking, security, and observability with minimal overhead, making it ideal for large-scale Kubernetes deployments. --- #### **2. Key Features** - **Network Policy** Cilium supports advanced network policies using a structured language for defining L3/L4 and L7 traffic rules. It ensures secure communication between containers and services. - **Observability** Hubble provides real-time monitoring of network traffic, security events, and endpoint connections, enabling troubleshooting and compliance monitoring. - **Security** Cilium enforces granular network security policies, including east-west traffic control, service isolation, and least privilege enforcement. - **Performance** Built on eBPF, Cilium delivers high performance with low overhead, making it suitable for large-scale clusters. --- #### **3. Getting Started** - **Installation Guides** The documentation provides step-by-step instructions for installing Cilium in various environments, including Kubernetes clusters and standalone setups. - **Quick Tutorials** Hands-on tutorials are available for users to experiment with Cilium in a live environment, covering basic setup and policy enforcement. --- #### **4. Advanced Topics** - **Concepts** The documentation explains the core components of Cilium (e.g., Cilium Agent, Hubble Relay) and different deployment models (DaemonSet, Operator-based). - **BPF and XDP Reference** A technical deep dive into eBPF and XDP (eXpress Data Path) technologies is provided, targeting developers and advanced users. - **API Reference** Details of the Cilium Agent API are included for interacting with local Cilium instances programmatically. --- #### **5. Development and Contribution** - **How to Contribute** The documentation outlines the process for contributing to the Cilium project, including setting up a development environment, submitting pull requests, and code review workflows. - **Development Setup** Instructions are provided for local development using Vagrant or manual installation, including building container images and running smoke tests. - **Release Process** The documentation details the steps for preparing and releasing new versions of Cilium, including version bumping, testing, and announcing releases. --- #### **6. System Requirements** - **Kernel Version** Linux kernel >= 4.9.17 is required for running Cilium as a container or native process. - **Clang+LLVM** Clang+LLVM >= 10.0 is required for compiling Cilium when running it as a native process. - **Key-Value Store** Cilium optionally uses etcd (>= 3.1.0) or Consul (>= 0.6.4) for state management in Kubernetes clusters. --- #### **7. Upgrading Cilium** - **Upgrade Notes** The documentation provides specific instructions for upgrading from one version to another, highlighting potential impacts on L3 and L7 traffic. - **Version-Specific Changes** Key changes and deprecated options are documented for each release, ensuring smooth transitions between versions. --- #### **8. Integration with External Tools** - **Kubernetes Addons** Cilium integrates with tools like kubeadm, kops, and kubespray for cluster setup and management. - **Bandwidth Manager** Cilium supports Kubernetes' Bandwidth Manager (beta) for resource prioritization. - **Egress Gateway** Cilium provides an egress gateway (beta) for managing external traffic. --- #### **9. Monitoring and Troubleshooting** - **Metrics Collection** Instructions are provided for configuring metrics collection from Cilium to integrate with monitoring tools like Prometheus. - **Troubleshooting Guide** The documentation includes best practices for diagnosing and resolving issues in different deployment modes. --- ### Summary Cilium v1.10 documentation is a comprehensive resource for users and contributors, covering installation, configuration, advanced networking, security policies, observability, and development workflows. It is designed to help users leverage Cilium's eBPF-based architecture for efficient and secure Kubernetes networking.