around Git, i.e., the version control ecosystem. The focus is entirely on keeping Git as a single source of truth for infrastructure and application configuration changes. In an ideal world, this approach entire state of your cluster kept under source control, diff tools and synchronization agents can compare what’s running in production with what’s under source control — and when a divergence is detected KUBERNETES REFCARD | SEPTEMBER 2022 3 SINGLE SOURCE OF TRUTH In the GitOps world, version control systems (VCS) like Git should be the only source of truth. Whatever changes one wants to perform

Challenges of Infrastructure as Code Containers Change the Game Argo CD Flux Open Cluster Management Other GitOps Tools PipeCD Keptn Pulumi Kubernetes Operator with it. Christian has built out a lot of the foundation of GitOps. If you asked me for the best source of GitOps knowledge, I’d say you’ve found them already. —Chris Short Co-chair, OpenGitOps/GitOps we’re also celebrating the opportunity he’s taken to continue to influence and evolve the GitOps community. We’re excited to share Christian’s enthusiasm for GitOps here in his first book, and we’ll continue

GitOps is for Everyone Developers Operations Kubernetes Cluster Node 1 Kubernetes (K8s) is an open-source system for automating deployment, scaling, and management of containerized applications. TLDR; which are easily stored and managed in git OpenShift GitOps Principles ● Separate application source code (Java/.Net/etc) from manifests (yaml) ● Deployment manifests are standard k8s manifests ● destination: namespace: argocd server: https://kubernetes.default.svc project: product-catalog source: path: manifests/app/overlays/dev-quay repoURL: https://github.com/gnunn-gitops/product-catalog

Continuous Delivery and infrastructure operation Treat everything as code Git is the single source of truth Operations through Git workflows 5 GitOps Workflow a declarative approach to application teams Standard Workflow Multi-cluster consistency 7 Source Git Repository Image Registry CI The GitOps Application Delivery Model 8 Source Git Repository Config Git Repository Image Registry CD The GitOps Application Delivery Model Pull Request Push Pull Push Pull Pull Request 9 Source Git Repository Image Registry CI The GitOps Application Delivery Model Config Git Repository

described, it can be versioned in Git. All changes for operations and applications share the same source of truth. Software agents continuously monitor the Git repo and reconcile any changes or divergences times by using Git to manage Kubernetes more rapidly. Recover in minutes Use Git as the single source of truth to revert/rollback and fork in the case of a catastrophic event. Meet compliance requirements and is certified Kubernetes conformant meaning it leverages all the benefits of open source tooling from the community and enables migration from standard Kubernetes applications without code refactoring

trademark of Joyent. Red Hat is not formally related to or endorsed by the official Joyent Node.js open source or commercial project. The OpenStack ® Word Mark and OpenStack logo are either registered trademarks/service We are not affiliated with, endorsed or sponsored by the OpenStack Foundation, or the OpenStack community. All other trademarks are the property of their respective owners. Abstract This document provides

trademark of Joyent. Red Hat is not formally related to or endorsed by the official Joyent Node.js open source or commercial project. The OpenStack ® Word Mark and OpenStack logo are either registered trademarks/service We are not affiliated with, endorsed or sponsored by the OpenStack Foundation, or the OpenStack community. All other trademarks are the property of their respective owners. 摘要 摘要 本文档提供在 OpenShift GitOps

trademark of Joyent. Red Hat is not formally related to or endorsed by the official Joyent Node.js open source or commercial project. The OpenStack ® Word Mark and OpenStack logo are either registered trademarks/service We are not affiliated with, endorsed or sponsored by the OpenStack Foundation, or the OpenStack community. All other trademarks are the property of their respective owners. 摘要 摘要 本文档概述 OpenShift GitOps

Welcome to the IstioCon 2021 IstioCon 2021 is the inaugural community conference for the industry's most popular service mesh. IstioCon is a community-led event, showcasing the lessons learned from running running Istio in production, hands-on experiences from the Istio community, and featuring maintainers from across the Istio ecosystem. The conference offers a mix of keynotes, technical talks, lightning talks and games are also included with two social hours to take the load off and mesh with the Istio community, vendors, and maintainers! #IstioCon Agenda ● Introduction ● Target Audience ● Topics covered

teams to improve overall organisational productivity and development velocity.” James Governor, — Source Redmonk.com Executive summary Adopting the platform approach alone is not enough. Organizations observability this is increasingly important. Good DX allows for shift left.” — James Governor, Source Redmonk.com 2021 State of DevOps report The 2021 State of DevOps report released by Puppet and friction. The internal platform approach Use of internal platforms and level of DevOps evolution Source: Puppet While there are many ways to deliver resources and tools to application developers, the