January 2019
Intermediate to advanced
484 pages
11h 48m
English
Content preview from DevOps with Kubernetes - Second Edition
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Affinity and anti-affinity
Even though nodeSelector is simple and flexible, it's still inept at expressing the complicated needs of real-world applications. For example, we usually don't want pods of a StatefulSet be put in the same availability zone to satisfy cross-zone redundancy. It can be difficult to configure such requirements with only node selectors. For this reason, the concept of scheduling under constraints with labels has been extended to include affinity and anti-affinity.
Affinity comes into play in two different scenarios: pods-to-nodes and pods-to-pods. It's configured under the .spec.affinity path of a pod. The first option, nodeAffinity, is pretty much the same as nodeSelector, but formulates the relation between pods and ...
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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.
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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.