'--compute-nodes' Parameter Creates Extra Infra Nodes in a ROSA Cluster

[maulikshah999]

Our team noticed that extra infra nodes are created when we create a ROSA cluster.

Here is the command which is used in our terraform script.

$rosa create cluster --cluster-name='${self.triggers.cluster_name}' --compute-machine-type='${var.worker_machine_type}' --compute-nodes ${var.worker_machine_count} --region ${var.region} \
    --machine-cidr='${var.machine_network_cidr}' --service-cidr='${var.service_network_cidr}' --pod-cidr='${var.cluster_network_cidr}' --host-prefix='${var.cluster_network_host_prefix}' --private=${var.private_cluster} \
    --multi-az=${var.multi_zone} --version='${var.openshift_version}' --subnet-ids='${local.subnet_ids}' --watch

Value used:
worker-machine-type="m5.4xlarge"
worker-machine-count="6"

Reference link: https://docs.openshift.com/rosa/rosa_cli/rosa-manage-objects-cli.html#rosa-create-cluster_rosa-managing-objects-cli

Expected Behavior: Only selected worker nodes should be created but extra Infra nodes should not be created.

Thanks.

[openshift-bot]

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[openshift-bot]

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[nastacio]

This should not be marked as rotten without an answer.

/remove-lifecycle stale
/lifecycle frozen

[vkareh]

All ROSA clusters need infra nodes. The instance type of the infra nodes is determine by the number of worker nodes in the cluster.