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Prerequisites & cluster preparation(15 of 15)

Keep this order!
⚠️ Cluster introduction

The following tests have been executed on a Single Node OpenShift (SNO) cluster.

The cluster is using: Minio Object Storage, MetalLB, LVM (local disks must be available), and a single NIC (a 2nd IP address is used for the VM network tests).

Some test cases could not be fully executed due to limitation of the SNO cluster or the hardware. They are still documented for reference and marked accordingly.

Red Hat Advanced Cluster Management for Kubernetes v2.17 is the Kubernetes fleet manager for OpenShift. On an SNO cluster, ACM runs as the hub — in a real multi-cluster setup it would manage additional spoke clusters. For the PoC, the local SNO can be used as local-cluster (hub manages itself). ACM 2.17 adds native fleet management features, governance policies, and observability.

1Step 1 — Install ACM Operator (RHACM) via OperatorHub
Ecosystem → Software Catalog → Operators → Advanced Cluster Management for Kubernetes
Channel: release-2.17, namespace: open-cluster-management
2Step 2 — Create MultiClusterHub CR (starts all ACM components). Set availabilityConfig to Basic for the test installation
3Step 3 — Wait until MultiClusterHub phase: Running (takes 5–10 min)
4Step 4 — Open ACM console: Infrastructure → Clusters
5Step 5 — Verify local-cluster: SNO manages itself
6Step 6 — Enable observability add-on (requires MinIO bucket from PRE-11; object-storage secret in Commands/YAML tab)
7Step 7 — Create MultiClusterObservability CR for Thanos/Grafana