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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.
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.yamlfile.
Procedure
Set the number of compute replicas to
0in yourinstall-config.yamlfile, as shown in the followingcomputestanza:Example
install-config.yamlfile for a three-node clusterapiVersion: v1 baseDomain: example.com compute: - name: worker platform: {} replicas: 0 # ...
