SEPTEMBER 2022 GitOps for Kubernetes Essentials to Applications Hosted in Cloud-Native Ecosystems NINAD DESAI STAFF ENGINEER, INFRACLOUD CONTENTS • About GitOps for Kubernetes • Configuration Management Management in Kubernetes • GitOps for Kubernetes Essentials • Conclusion Git is the most widely used version control system, with more than 80 percent of its market share in today’s software industry running in Kubernetes. In this Refcard, we will dive into what GitOps means in the Kubernetes world, key principles, and the advantages for cloud-native ecosystems. ABOUT GITOPS FOR KUBERNETES Thanks

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The Path to GitOps | 2 Contents 05 Foreword 07 Introduction 08 Chapter 1–What is GitOps? Origins in DevOps Kubernetes and containers Cloud-Native DevOps A DevOps Operating Workflows Where does GitOps fit in? Operations via Pull Request Summary 14 Chapter 2–Tools of the Trade Infrastructure as Code History of Infrastructure as Code Challenges Flux Open Cluster Management Other GitOps Tools PipeCD Keptn Pulumi Kubernetes Operator Summary 18 Chapter 3–Templating Everything in Git Kustomize Helm

Running at scale 1.10. GitOps and Helm 1.11. Continuous Deployment 1.12. Secrets management 2. A Vision of GitOps 2.0 2.1. Visibility into the whole software lifecycle 2.2. Observability and was officially named as ​“GitOps” in 2017​ by Weaveworks and has since become very popular for Kubernetes deployments. The concepts behind GitOps are quite straight-forward: ● Infrastructure as you want to change the state you need to perform a Git operation such as creating a commit or opening a pull request Specifically for Kubernetes, GitOps says that you must not use `kubectl` to change

with GitOps and OpenShift 1 Jonas Janz AppDev Solutions Architect https://github.com/pixeljonas 2 GitOps is when the infrastructure and/or application state is fully represented by the contents of pull-requests” GitOps Benefits 5 GitOps is for Everyone Developers Operations Kubernetes Cluster Node 1 Kubernetes (K8s) is an open-source system for automating deployment, scaling, and management It is a resource scheduler KUBERNETES 101 6 Node Node Node Node Node Node Node Node 1 1 2 2 2 2 3 3 3 4 4 Applications OpenShift 4 - A Smarter Kubernetes Platform Automated, full-stack

GitOps Boosts Business Performance: The Facts How GitOps Boosts Business Performance: The Facts 2 INTRODUCTION As cloud-native applications have become more prevalent, the concept of DevOps has changed to the performance of engineering teams. Technology, in particular cloud native technology like Kubernetes and its ecosystem of projects, is now a core competency for organizations in all industries, from Deployment frequency DORA found that the world’s best performing businesses deploy many times a day – from around 50 times up to thousands of times for tech giants such as Amazon. Low performing businesses

eBook 1 The Practical Guide to GitOps Deliver quality at speed $ eBook 2 The Freedom of Choice Table of Contents The Principles of GitOps Key Benefits of GitOps What Happens When you Adopt GitOps Separation of Privileges 03 04 05 06 07 10 GitOps Hands On Tutorial Part 1: Spin up a Kubernetes Cluster Part 2: Fork the Sock Shop Repository Part 3: Setup CI and Connect a Container Registry your team can make changes and updates safely and securely to complex applications running in Kubernetes. Freedom of choice Because there is no single tool that can do everything required in your pipeline

Manager DevOps is the key to meet the insatiable demand for delivering quality applications rapidly 2 Continuous Integration(CI) & Continuous Delivery (CD) 3 Build Test Security Checks Release Deploy reliability 4 What is GitOps? An developer-centric approach to Continuous Delivery and infrastructure operation Treat everything as code Git is the single source of truth Operations through Git workflows What you have (current state) CD Why GitOps? Reliably and consistently configure multiple Kubernetes clusters and deployment 6 Capturing and tracing any change to clusters through Git history

GitOps on AWS: Increase velocity of your DevOps teams P.2 Git familiar with DevOps and GitOps For over a decade, software companies have been trying to move away from the waterfall approach to application modern, cloud-native technologies. They need a way to confidently and securely deploy changes to Kubernetes that doesn’t require them to become experts in the orchestration tool. That’s where GitOps comes Change Lead Time Change Failure Rate MTTR vs. MTTF (mean time to recover/fail) P.3 Simplify Kubernetes operations using developer tools GitOps helps DevOps teams be more autonomous and productive

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 目 目录 录 第 第 1 章 章 什么是 什么是 GITOPS？ ？ 第 第 2 章 章 关于 关于 RED HAT OPENSHIFT GITOPS 2.1. 主要特性 2.2. OPENSHIFT GITOPS 常用术语表 2.3. 其他资源 第 第 3 章 章 为 为支持收集 Red Hat OpenShift GitOps 1.13 了解 了解 OpenShift GitOps 2 第 1 章 什么是 GITOPS？ GitOps 是为云原生应用程序实施持续部署的一种声明方式。您可以使用 GitOps 创建可重复进程，用于在 多集群 Kubernetes 环境间管理 OpenShift Container Platform 集群和应用程序。GitOps 以快速的速度处 第 第 1 章 章 什么是 什么是 GITOPS？ ？ 3 第 2 章 关于 RED HAT OPENSHIFT GITOPS Red Hat OpenShift GitOps 是一个使用 Argo CD 作为声明性 GitOps 引擎的 Operator。它启用了多集群 OpenShift 和 Kubernetes 基础架构的 GitOps 工作流。使用 Red Hat OpenShift