January 2023
Intermediate to advanced
242 pages
4h 38m
English
Content preview from GitOps Cookbook
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Chapter 7. Argo CD
In the previous chapter, you learned about Tekton and other engines such as GitHub Actions to implement the continuous integration (CI) part of a project.
Although CI is important because it’s where you build the application and check that nothing has been broken (running unit tests, component tests, etc.), there is still a missing part: how to deploy this application to an environment (a Kubernetes cluster) using the GitOps methodology and not creating a script running kubectl/helm commands.
As Daniel Bryant puts it, “If you weren’t using SSH in the past to deploy your application in production, don’t use kubectl to do it in Kubernetes.”
In this chapter, we’ll introduce you to Argo CD, a declarative, GitOps continuous delivery (CD) tool for Kubernetes. In the first part of the section, we’ll see the deployment of an application using Argo CD (Recipes 7.1 and 7.2).
Argo CD not only supports the deployment of plain Kubernetes manifests, but also the deployment of Kustomize projects (Recipe 7.3) and Helm projects (Recipe 7.4).
A typical operation done in Kubernetes is a rolling update to a new version of the container, and Argo CD integrates with another tool to make this process smooth (Recipe 7.5).
Delivering complex applications might require some orchestration on when and how the application must be deployed and released (Recipes 7.7 and 7.8).
We’ll see how to:
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Install and deploy the first application.
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Use automatic deployment and self-healing applications. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.