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. GitOps is developer experience. In the last few years, the number of tools and systems needed to manage version control, configuration management, Infrastructure as Code, CI/CD, and observability have drastically where infrastructure and application configuration changes revolve around Git, i.e., the version control ecosystem. The focus is entirely on keeping Git as a single source of truth for infrastructure

unrelated. Is GitOps something that application developers use? Is it for infra- structure folks or system administrators? Is it something you can buy off the shelf? Or is it just a fancy new term for DevOps change took down their entire hosting platform, but the DevOps engineers were able to bring back the system in about 40 minutes. When asked how they did it so quickly, they described their process, which cofounder Alexis Richardson called “GitOps.” The DevOps engineers over at Weaveworks came up with a system that allowed them to return their entire platform (not just the workloads running on them) back

It also makes use of diff tools to compare the actual production state with what’s under source control and alerts you when there is a divergence. The ultimate goal of GitOps is to speed up development Whatever you choose for your delivery pipeline, applying GitOps best practices with Git (or any version control) should be an integral component of your process. It will make building and adopting continuous significantly speed up your team’s ability to ship features. eBook 4 The Principles of GitOps The entire system is described declaratively. Kubernetes is just one example of many modern cloud native tools that

delivery teams can release software continuously, and with full confidence in the reliability of the system. THE GITOPS GUIDE TO BUILDING & MANAGING INTERNAL PLATFORMS 3 weave.works ▼ Self-service In the past, the only way a developer could get access to servers, data, or software was to ask a system administrator. In the modern era, however, developers require on-demand access to a variety of tools organization like the Department of Defense (DoD). With the world’s most powerful weapons arsenal in its control, there is no room for error with security. The DoD has been transforming itself in recent years

infrastructure GitOps allows developers or the Ops team to declare their infrastructure as code and version control them via Git. Whenever a new change is required, a pull request with the new change is created apply when implementing and dealing with GitOps. Let’s take a look. Declarative system In the GitOps model, the complete system is configured declaratively. This declarative approach is focused on the result and rollbacks. The system state is versioned in Git All the declarative states are stored in the version-controlled system, which acts as the single source of truth. With this version-controlled approach

development lifecycle, GitOps contributes to the automation of infrastructure. This includes version control, collaboration, compliance, and CI/CD. GitOps is a specific implementation of DevOps that truth for declarative infrastructure and application code. In GitOps, the desired state of the system is versioned and stored in a Git repository, and a reconciliation loop continuously monitors and published by the GitOps Working Group: The desired state of a GitOps managed system must be: 1. Declarative A system managed by GitOps must have its desired state expressed declaratively

– you can keep it in version control. This means the desired state and any changes of an entire application stack from the container cluster upwards are kept under source control. Any divergence from and operations tasks. The benefits for development teams include increased velocity and improved system reliability. Increased velocity with GitOps GitOps goes further than any other set of tools or already built into Kubernetes. But this increase in deployment velocity needn’t mean relinquishing control. Far from it. By recording every change that is made in Git, from code commits to production configuration

straight-forward: ● Infrastructure as Code: Git is always the source of truth on what happens in the system ● Code changes always go through an automated process ● Deployments, tests, and rollbacks controlled at any moment. Those continuously compare the current state with the desired state to ensure the system is running like expected. The most popular GitOps tools today are ​Flux ​and ​ArgoCD​. As several GitOps has been heralded as a way to decouple CI from deployments. In the classic use of a CI/CD system, the last step in the pipeline is a deployment step. Classic pipeline With GitOps you

clusters with Istio multicluster setup. Benefits are: ● Separate cluster management for better control and audit ● Redundancy and High Availability But it does (did) pose challenges... What is Multicluster Target Audience What to expect Istio Multicluster First Demo About GitOps Second Demo What’s next? Control Plane Data Plane istiod Manages data plane components Handles Custom Resources Handles actual Target Audience What to expect Istio Multicluster First Demo About GitOps Second Demo What’s next? Control Plane Data Plane istiod Some container Istio Sidecar Proxy Istio Ingress Gateway Istio Egress

if you distribute this document or an adaptation of it, you must provide the URL for the original version. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert 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 plane。GitOps control plane 是您 可以安装 Argo CD 的任何命名空间。此 control plane 允许您在网络、实例和集群间置备、管理和操作 Argo CD。 在 control plane 对象 代表部署目标的 GitOps 存储库凭证的 secret 对象 openshift-gitops 是默 是默认 认 Argo CD 实 实例的 例的 control plane 命名空 命名空间 间。 。 声明性 声明性设 设置 置 有关系 有关系统 统和 和应 应用程序 用程序设 设置或配置所需的基 置或配置所需的基础 础架