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

07 Introduction 08 Chapter 1–What is GitOps? Origins in DevOps Kubernetes and containers Cloud-Native DevOps A DevOps Operating Model GitOps Principles Declarative Flux Open Cluster Management Other GitOps Tools PipeCD Keptn Pulumi Kubernetes Operator Summary 18 Chapter 3–Templating Everything in Git Kustomize Helm Structures Repositories Reflecting an Organizational Boundary Kubernetes Platform Administrator Kubernetes Application Developer Other Boundaries GitOps Repo Example

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 Application Delivery Model 8 Source Git Repository Config Git Repository Image Registry Kubernetes CI CD The GitOps Application Delivery Model Pull Request Push Pull Push Pull Pull Request Repository Image Registry CI The GitOps Application Delivery Model Config Git Repository Kubernetes Deploy Monitor Detect drift Take action CD Continuous Integration & Continuous Delivery

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 is a way to do Continuous Delivery. More specifically, it is an operating model for building Cloud Native applications that unifies Deployment, Monitoring and Management. It works by using Git as a source 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

respective companies. Introduction GitOps has gained popularity in the cloud-native ecosystem, particularly in Kubernetes-based environments, where managing infrastructure as code is crucial. Knowing reliability and reproducibility of deployments. GitOps is popular in the cloud-native ecosystem, particularly in Kubernetes-based environments, where managing infrastructure as code is crucial. Essential enforces that desired state. GitOps takes DevOps practices and puts them into action for managing cloud-native workloads. The Philosophy of GitOps GitOps automates application code deployments and infrastructure

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 the way software is developed not limited 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 practices and operating models for managing cloud native technologies that together make the promise of DevOps easier to realize. Created for a cloud-native world, GitOps makes developers more productive

they’re trying to spin up infrastructure on 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 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 GitOps is a standardized workflow for how to deploy, configure, monitor, update, and manage Kubernetes, it components, and all the applications that run on it. In GitOps, a Git repository contains

with bureaucracy and legacy systems to one that is founded on open source software and modern cloud-native practices. Along the way, they have kept DevSecOps as their top priority. To make this transformation of our teams operate their software and systems and are managing their infrastructure including Kubernetes clusters on their own. [The] GitOps approach was the enabler so that even small teams can operate wanted the scalability and reliability that comes with adopting Kubernetes, and also sought to leverage the ecosystem of available cloud-native open source projects in order to remain innovative and improve

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 full-stack installation from the container host to application services Seamless Kubernetes deployment to any cloud or on-premises environment Autoscaling of cloud resources One-click updates for platform

Abstract: GitOps is the gold standard for managing and deploying Kubernetes applications. In this talk, we’ll show you how we use raw Kubernetes, in addition to Helm and Terraform to manage our deployments operates a global SaaS product in the cloud using Kubernetes. CloudPosse helps companies like PeerStreet, RMS, Sportech, and others migrate to Kubernetes. Between the two of us, we’ve deployed to every built an established, well-worn path for using the principles of “GitOps” to take advantage of Kubernetes declarative infrastructure in order to deploy more often, and with more reliability. In this