Chapter 5. Installing a three-node cluster on Nutanix


In OpenShift Container Platform version 4.17, you can install a three-node cluster on Nutanix. A three-node cluster consists of three control plane machines, which also act as compute machines. This type of cluster provides a smaller, more resource efficient cluster, for cluster administrators and developers to use for testing, development, and production.

5.1. Configuring a three-node cluster

You configure a three-node cluster by setting the number of worker nodes to 0 in the install-config.yaml file before deploying the cluster. Setting the number of worker nodes to 0 ensures that the control plane machines are schedulable. This allows application workloads to be scheduled to run from the control plane nodes.

Note

Because application workloads run from control plane nodes, additional subscriptions are required, as the control plane nodes are considered to be compute nodes.

Prerequisites

  • You have an existing install-config.yaml file.

Procedure

  • Set the number of compute replicas to 0 in your install-config.yaml file, as shown in the following compute stanza:

    Example install-config.yaml file for a three-node cluster

    apiVersion: v1
    baseDomain: example.com
    compute:
    - name: worker
      platform: {}
      replicas: 0
    # ...

5.2. Next steps

Red Hat logoGithubRedditYoutubeTwitter

Learn

Try, buy, & sell

Communities

About Red Hat Documentation

We help Red Hat users innovate and achieve their goals with our products and services with content they can trust.

Making open source more inclusive

Red Hat is committed to replacing problematic language in our code, documentation, and web properties. For more details, see the Red Hat Blog.

About Red Hat

We deliver hardened solutions that make it easier for enterprises to work across platforms and environments, from the core datacenter to the network edge.

© 2024 Red Hat, Inc.