How to scale a node group

Type: How-to · Audience: Cluster operator

Overview

Change the number of machines in a node group.

Steps

1. Update the count via the API, CLI, or WebUI:

   Via CLI:

   cat > ng.yaml <<'YAML'
   apiVersion: v1
   kind: NodeGroup
   metadata:
     name: workers
     labels:
       rezuscloud.io/tenant: prod
     resourceVersion: 3
   spec:
     name: workers
     role: worker
     count: 5
     providerClass: "oci:VM.Standard.A1.Flex"
   YAML
   rezusctl apply -f ng.yaml --server $SERVER
   

   Via WebUI: Click "Scale" on the node group row, enter the new count.

2. Reconciliation fires automatically — the apply queue detects the spec change and runs tofu apply to create or destroy machines.

Verification

rezusctl get machines --cluster prod --server $SERVER

The machine count should match the new spec.count.