June 2025
Beginner to intermediate
310 pages
7h 59m
English
Content preview from Argo CD: Up and Running
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Chapter 10. Applications at Scale
In Chapter 4, you were introduced to the Application Custom Resource Definition (CRD) object, which facilitates the logical grouping of your Kubernetes manifests. This Application object serves as the atomic unit of work in Argo CD, allowing you to manage a collection of Kubernetes objects as a single entity. Argo CD uses the Application CRD to manage the entire lifecycle of this collection of Kubernetes objects.
Argo CD Applications operate autonomously, meaning that one Application does not have awareness of the status or health of another. This autonomy can pose challenges, especially in organizations employing a microservices architecture where each component resides in its own Application custom resource. For instance, certain Applications may need to be deployed sequentially—such as a database before a backend service or a service mesh before the main application. As infrastructure scales, managing these dependencies and Argo CD Applications becomes increasingly complex.
In this chapter, we will explore various deployment patterns available in Argo CD. These include approaches like the App-of-Apps with sync waves and ApplicationSets with Progressive Sync. These patterns will assist in managing dependencies between Argo CD Applications and facilitate the deployment and management of these Applications at scale.
Argo CD Application Drawbacks
In Chapter 5, we explored the customization of the Argo CD sync operation to accommodate the varying ...
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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.