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

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 third principle states: Software agents automatically pull the desired state declarations from the source. This principle is where GitOps starts to differentiate itself from a traditional event-driv- en

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

Native applications that unifies Deployment, Monitoring and Management. It works by using Git as a source of truth for declarative infrastructure and applications. Automated CI/CD pipelines roll out changes Git. 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 different parts of your CICD pipeline. You can select a set of tools from the open source ecosystem or from closed source or depending on your use case, you may even combine them. The most difficult

concepts behind GitOps are quite 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 artifacts and normally does not touch (or know about) source code. But in most cases, in order to run unit tests, you need access to the source code of the application. The current crop of GitOps tools tools cannot run unit/integration tests. That would require visibility in the source code along with all the testing frameworks and libraries needed for the tests. This means that you are forced to

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

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

automate the deployment and management of applications and infrastructure using Git as the single source of truth. It simplifies and standardizes the deployment and management of complex systems, improves to GitOps? Learn the differences between GitOps and DevOps, and how to ensure Git is the single source of truth for your application in our free Understanding GitOps guide. DOWNLOAD NOW | 05 3 compliance, and CI/CD. GitOps is a specific implementation of DevOps that uses Git as the single source of truth for declarative infrastructure and application code. In GitOps, the desired state of the

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 upstream Kubernetes 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

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