January 2019
Intermediate to advanced
484 pages
11h 48m
English
Content preview from DevOps with Kubernetes - Second Edition
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Triggering updates
In Chapter 3, Getting Started with Kubernetes, we discussed the rolling update mechanism of the pods in a deployment. Let's recap what happens after the update process is triggered:
- The deployment creates a new ReplicaSet with 0 pods, according to the updated manifest
- The new ReplicaSet is scaled up gradually while the previous ReplicaSet keeps shrinking
- The process ends after all of the old pods are replaced
This mechanism is implemented automatically by Kubernetes, meaning we don't have to supervise the updating process. To trigger it, all we need to do is inform Kubernetes that the pod specification of a deployment is updated; that is to say, we modify the manifest of a resource in Kubernetes. Suppose we have a deployment, ...
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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.