March 2023
Intermediate to advanced
390 pages
9h 8m
English
Content preview from Kubernetes Patterns, 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 7. Batch Job
The Batch Job pattern is suited for managing isolated atomic units of work. It is based on the Job resource, which runs short-lived Pods reliably until completion on a distributed environment.
Problem
The main primitive in Kubernetes for managing and running containers is the Pod. There are different ways of creating Pods with varying characteristics:
- Bare Pod
-
It is possible to create a Pod manually to run containers. However, when the node such a Pod is running on fails, the Pod is not restarted. Running Pods this way is discouraged except for development or testing purposes. This mechanism is also known as unmanaged or naked Pods.
- ReplicaSet
-
This controller is used for creating and managing the lifecycle of Pods expected to run continuously (e.g., to run a web server container). It maintains a stable set of replica Pods running at any given time and guarantees the availability of a specified number of identical Pods. ReplicaSets are described in detail in Chapter 11, “Stateless Service”.
- DaemonSet
-
This controller runs a single Pod on every node and is used for managing platform capabilities such as monitoring, log aggregation, storage containers, and others. See Chapter 9, “Daemon Service”, for a more detailed discussion.
A common aspect of these Pods is that they represent long-running processes that are not meant to stop after a certain time. However, in some cases there is a need to perform a predefined finite unit of work reliably and then shut ...
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.