June 2025
Beginner to intermediate
310 pages
7h 59m
English
Content preview from Argo CD: Up and Running
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
Chapter 5. Synchronizing Applications
Argo CD’s synchronization process makes it easy to be able to take Kubernetes resources stored within Git or Helm repositories and apply them to a target cluster. Given that this capability is one of the core features of Argo CD, there are a variety of options available for determining when the synchronization process will be triggered and how the Kubernetes resources will be applied. This level of control is important, as there may be a need to guard exactly how and when content is applied (for example, if certain resources need to be applied in a specific order). In this chapter, we will explore the options available when synchronizing Argo CD Applications, their impact against the lifecycle of the application itself, the Argo CD server, and ultimately the target Kubernetes cluster.
Managing How Applications Are Synchronized
Given that the synchronization of content from source to target Kubernetes cluster is a fundamental concept in Argo CD, it is important to first understand the defaults that Argo CD applies and the various levels of customizations that are available. If you recall in Chapter 4, we briefly introduced synchronization and covered how the configurations can be defined within the .spec.syncPolicy property of an Application.
By default, when Applications are created, none of the rendered resources are applied to the Kubernetes cluster. This may surprise many new Argo CD users given that Argo CD is a tool that manages assets ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.