May 2024
Intermediate to advanced
366 pages
7h 58m
English
Content preview from Certified Kubernetes Application Developer (CKAD) Study Guide, 2nd Edition
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 18. Resource Requirements, Limits, and Quotas
Workload executed in Pods will consume a certain amount of resources (e.g., CPU and memory). You should define resource requirements for those applications. On a container level, you can define a minimum amount of resources needed to run the application, as well as the maximum amount of resources the application is allowed to consume. Application developers should determine the right-sizing with load tests or at runtime by monitoring the resource consumption.
Note
Kubernetes measures CPU resources in millicores and memory resources in bytes. That’s why you might see resources defined as 600m or 100Mi. For a deep dive on those resource units, it’s worth cross-referencing the section “Resource units in Kubernetes” in the official documentation.
Kubernetes administrators can put measures in place to enforce the use of available resource capacity. We’ll discuss two Kubernetes primitives in this realm, the ResourceQuota and the LimitRange. The ResourceQuota defines aggregate resource constraints on a namespace level. A LimitRange is a policy that constrains or defaults the resource allocations for a single object of a specific type (such as for a Pod or a PersistentVolumeClaim).
Working with Resource Requirements
It’s recommended practice that you specify ...
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.