The Freedom of Choice Table of Contents The Principles of GitOps Key Benefits of GitOps What Happens When you Adopt GitOps? Typical CI/CD Pipeline GitOps Separation of Privileges 03 04 05 06 origin is key to a secure definition of the desired state of the cluster. eBook 6 eBook 6 What Happens When you Adopt GitOps? Introducing GitOps into your organization means: Any developer that control over your production cluster, even if your production cluster is highly secure. But what happens if your cluster goes down, and you need to recreate it? How do you restore the previous state of

agnostic, act as service proxies and allow for all traffic (ingress and egress) to flow through them before reaching or leaving a container. This greatly improves security as bad actors cannot easily hide can make sure that each configuration change is verified by your peers and automatically tested before it is deployed. Your platform should not be managed by one single person. It’s a bad idea to have industry. It is a replicable, automated, immutable construct where your change management, everything happens in Git…. Everything is founded on that infrastructure as GitOps mindset where your design stays

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 ● Deployments, tests, and GitOps as a practice for releasing software has several advantages, but like all other solutions before it, has also several shortcomings. It seems that the honeymoon period is now over, and we can finally just by looking at the Git History? ● How long did feature X stay in the staging environment before going to production? ● What is the worst, best, and average lead time (period starting from a developer

review core benefits over the traditional CI/CD approach. TRADITIONAL CI/CD WORKFLOW OVERVIEW Before diving further, let's first understand how traditional CI/CD works as most organizations that set production cluster, even if your production cluster is highly secure. DISASTER RECOVERY What happens when you need to recreate your cluster in the case of a total meltdown? How do you restore the new version reduces risk by slowly rolling out changes to an initially small subset of end users before rolling it out to all users. The canary deployment strategy ties together the best of both blue-green

divergence from this desired state can be then observed and alerted on straight away. And if the worst happens, the entire cluster can be rolled back and rebuilt with ease. The simplest way to implement GitOps allows for fast iteration and experimentation, and allows development teams to make crucial decisions before they deploy new features. Features or other updates like cluster configuration can be pushed to lower with GitOps To reduce the incidence of failures, safety nets must be introduced to catch them before problematic code makes it into production. GitOps introduces key safety nets. With the entire

initial deployment will be carried out in a staging environment, which acts as a further fail safe before the final deployment of the infrastructure modifications to the production environment. Likewise will be successfully modified with new resource allocations to meet the user demands. But, what happens if the deployment fails, or a configuration error causes a networking issue? GitOps approach allows

What’s powerful about this method is that you no longer have to wait for the CI/CD process to finish before detecting and correcting drift. The GitOps controller acts as both an application delivery mechanism CD can also work with Helm [2.2] and Kustomize [2.3] to render the YAML produced by those tools before applying them to the Kubernetes cluster. (We’ll look at Helm and Kustomize more closely in upcoming dev directory, applying the resulting YAML into a Kubernetes cluster. Kustomize validates YAML before deploying it and is agnostic regarding which GitOps tools you choose (Argo CD, Flux [3.2], Anthos

specific order ○ Subscribe Operator before deploying instance ○ Create namespace/project before deploying application into it ○ Deploy required infrastructure before application (try to avoid this) ● ○ Init containers ○ Jobs ○ Operators ● Argo CD Resource Hooks ○ Hooks are ways to run scripts before, during, and after a Sync operation ○ Hooks can be run: PreSync, Sync, PostSync and SyncFail Argo Deployment Pro Consistent Post-Test update of image reference Con Image reference updated in git before integration tests, manage rollback? Inconsistent Con Pipeline tools must be able to wait for

and the details are propagated to all Proxies #IstioCon K9s https://github.com/derailed/k9s Before diving into demo... This demo uses following tools / versions Target Audience What to expect Istio Demo About GitOps Second Demo What’s next? @rytswd #IstioCon K9s https://github.com/derailed/k9s Before diving into demo... This demo uses following tools / versions Target Audience What to expect Istio

trademarked names and logos are property of their respective companies. The Philosophy of GitOps Before getting started, it’s important to understand the philosophy of GitOps. GitOps borrows best practices