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Getting Started with Kubernetes, Second Edition

You're reading from   Getting Started with Kubernetes, Second Edition Orchestrate and manage large-scale Docker deployments

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781787283367
Length 286 pages
Edition 2nd Edition
Tools
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Author (1):
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Jonathan Baier Jonathan Baier
Author Profile Icon Jonathan Baier
Jonathan Baier
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Toc

Table of Contents (13) Chapters Close

Preface 1. Introduction to Kubernetes FREE CHAPTER 2. Pods, Services, Replication Controllers, and Labels 3. Networking, Load Balancers, and Ingress 4. Updates, Gradual Rollouts, and Autoscaling 5. Deployments, Jobs, and DaemonSets 6. Storage and Running Stateful Applications 7. Continuous Delivery 8. Monitoring and Logging 9. Cluster Federation 10. Container Security 11. Extending Kubernetes with OCP, CoreOS, and Tectonic 12. Towards Production Ready

Node selection


As mentioned previously, we can schedule DaemonSets to run on a subset of nodes as well. This can be achieved using something called nodeSelectors. These allow us to constrain the nodes a pods runs on, by looking for specific labels and metadata. They simply match key-value pairs on the labels for each node. We can add our own labels or use those that are assigned by default.

The default labels are listed in the following table:

Default Node Labels

Description

kubernetes.io/hostname

This shows the hostname of the underlying instance or machine

beta.kubernetes.io/os

This shows the underlying operating system as a report through the Go Language

beta.kubernetes.io/arch

This shows the underlying processor architecture as a report through the Go Language

beta.kubernetes.io/instance-type

(Cloud-Only) This is the instance type of the underlying cloud provider

failure-domain.beta.kubernetes.io/region

(Cloud-Only) This is the region of the underlying cloud provider

failure-domain.beta.kubernetes...

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