？ 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 GitOps，管理员可以在 集群和开发生命周期中一致地配置和部署基于 分析和实验等高 级部署功能。 集群范 集群范围 围的 的实 实例 例 Argo CD 配置为管理集群中的所有资源的模式，包括某些特定于集群的资源，如集群配置、集群 RBAC、Operator 资源、平台 Operator 或 secret。 control plane (GitOps control plane) 在 GitOps 上下文中，您可以为每个安装的 Argo CD 有一个 control 实例） 例） Red Hat OpenShift GitOps 1.13 了解 了解 OpenShift GitOps 6 Red Hat OpenShift GitOps Operator 在安装后立即 在安装后立即实 实例化的默 例化的默认实 认实例，在 例，在 openshift-gitops 命 命 名空 名空间 间中，具有管理某些集群范 中，具有管理某些集群范围资 围资源的

Kubernetes Cluster Part 2: Fork the Sock Shop Repository Part 3: Setup CI and Connect a Container Registry Part 4: Let’s Get Started with GitOps Further Resources 11 14 21 23 31 36 continuous integration tool kicks off unit tests that eventually build the Docker image that gets pushed to the container registry. With a typical CI/CD pipeline, Docker images are deployed using some sort CONTINUOUS INTEGRATION CONTINUOUS DEPLOYMENT Write Code VCS Code Base Unit Tests Integ Tests Container Registry DEPLOY eBook 8 Security and the Typical CI/CD Pipeline How secure is the typical CI/CD pipeline

Open Cluster Management Other GitOps Tools PipeCD Keptn Pulumi Kubernetes Operator Summary 18 Chapter 3–Templating Everything in Git Kustomize Helm Operators Considerations Multicluster Management Non-Declarative Infrastructure Security Base Image Selection Everything as Code Conclusion 45 About the Author The Path to GitOps | 5 Foreword feel if they are already using Helm often. Originally, Flux was built as a monolithic “do it all” operator modeled after what Weaveworks felt that it meant to do a GitOps workflow. With Flux version 2,

you try to define the sequence of steps, which unfortunately is an additional overhead on the operator. GitOps promotes a declarative approach. Every object you use in GitOps can be coded and declared to GitOps workflows. For example, when a group of configuration updates are made by a human operator, the Kubernetes orchestrator will keep applying those changes until the cluster's state is converged can also be extended and automated using Kubernetes Custom Resource Definitions (CRDs) with the operator pattern. These agents can then be used to automatically detect and apply configuration changes

consistency 7 Source Git Repository Image Registry CI The GitOps 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 9 Source Git Repository Image Registry CI The GitOps Application Delivery Model Config Git Repository Kubernetes Deploy Monitor 11 OpenShift Builds OpenShift Pipelines Source Git Repository Config Git Repository Image Registry Kubernetes The GitOps Application Delivery Model on OpenShift Pull Request Push Pull OpenShift

/ ● Sometimes you have cases where you need to deploy things in a specific order ○ Subscribe Operator before deploying instance ○ Create namespace/project before deploying application into it ○ Deploy ArgoCD Managed Deployment Pipeline Managed Deployment Pro Consistent Post-Test update of image reference Con Image reference updated in git before integration tests, manage rollback? Inconsistent Con sync Application repo Environment repo Openshift Pipeline Updates image in dev manifest Push newly built container image Apply the newly updated manifests Infrastructure repo Application

GitOps Removing OpenShift GitOps Operator from your cluster Last Updated: 2024-01-11 Red Hat OpenShift GitOps 1.10 Removing GitOps Removing OpenShift GitOps Operator from your cluster Legal Notice instances added to the default namespace of the OpenShift GitOps Operator. It also discusses how to remove the OpenShift GitOps Operator from your cluster. . . . . . . . . . . . . . . . . . . . . . . GITOPS OPERATOR 3 3 3 Table of Contents 1 Red Hat OpenShift GitOps 1.10 Removing GitOps 2 CHAPTER 1. UNINSTALLING RED HAT OPENSHIFT GITOPS Uninstalling the Red Hat OpenShift GitOps Operator is a

点上运 运行 行 GITOPS CONTROL PLANE 工作 工作负载 负载 1.1. 将 GITOPS CONTROL PLANE 工作负载移到基础架构节点 1.2. 将 GITOPS OPERATOR POD 移到基础架构节点 1.3. 其他资源 3 3 4 6 目 目录 录 1 Red Hat OpenShift GitOps 1.13 基 基础 础架 架构节 构节点上的 点上的 Container Platform 在基础架构节点上运行 GitOps control plane 工作负载。默认 情况下，这包括 Operator pod 和由 openshift-gitops 命名空间中的 Red Hat OpenShift GitOps Operator 创建的 control plane 工作负载，包括此命名空间中的默认 Argo CD 实例。 使用 GitOps control GitOpsService CR 中 的切换和容限覆盖。 1.2. 将 GITOPS OPERATOR POD 移到基础架构节点 您可以将 GitOps Operator pod 移到基础架构节点。 先决条件 先决条件 在集群中安装了 Red Hat OpenShift GitOps Operator。 您可以使用 cluster-admin 权限访问集群。 流程 流程 1. 运行以下命令，将现有节点标记为基础架构节点：

(Learn how to build a CI/CD pipeline.) The differentiating factor of a GitOps pipeline is the GitOps operator. This mechanism sits between the pipeline and the infrastructure platform, acting as a middleman between them. There are multiple available operators such as: Kubernetes Operator Terraform Cloud Operator Azure Service Operator Etc. GitOps workflow Now, we’ve got a Git repository and a properly configured CI/CD pipeline. The pipeline will then inform the Git Operator, which will pick up all the modifications and the desired new state. The Git operator will then compare the state of the existing infrastructure

Use Repository 分⽀策略、Flow、Workflow 7. Agile & Iteration ⼩粒度、多迭代 Tools VCS CI CD Container Registry CM IaC Container orchestration Yes Yes Yes Yes 透過 Runner 間接運⽤ 透過 Runner 間接運⽤ 可整合