DO432 – Multicluster Management with Red Hat Advanced Cluster Management for Kubernetes — Lesson 1: RHACM Architecture, Hub Deployment, Cluster Discovery, Import, and Provisioning

Learning Objectives

• Explain the architecture, purpose, dependencies, and expected behavior of RHACM architecture, hub deployment, and cluster discovery.
• Apply cluster import and cluster provisioning while preserving reviewable technical evidence.
• Recognize and correct the condition where an unstated prerequisite or ownership gap causes the initial design to be incomplete.

Detailed Topics

• RHACM architecture: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.
• hub deployment: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.
• cluster discovery: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.
• cluster import: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.
• cluster provisioning: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.

Instructor Demonstration

The instructor demonstrates rhacm architecture, hub deployment, cluster discovery, import, and provisioning by tracing architecture, commands, configuration, system messages, and evidence. The walkthrough tests how an unstated prerequisite or ownership gap causes the initial design to be incomplete and explains how to isolate the cause without masking related issues.

Hands-On Exercise

Establish a controlled baseline for RHACM Architecture, Hub Deployment, Cluster Discovery, Import, and Provisioning and add the verified result to the RHACM hub design, managed-cluster inventory, governance policies, GitOps placement plan, and fleet operations runbook.

1. Confirm scope, versions, access, dependencies, assumptions, and acceptance criteria.
2. Perform the workflow while recording commands, configuration, output, events, and decisions.
3. Test the normal path and one course-specific exception or boundary condition.
4. Retest the correction and document rollback, ownership, and follow-up actions.

Scenario Analysis

• Identify which dependency most strongly influences RHACM architecture in the stated scenario.
• Compare two approaches for cluster import and explain the security, reliability, performance, and support trade-offs.
• Decide what evidence must be retained in the RHACM hub design, managed-cluster inventory, governance policies, GitOps placement plan, and fleet operations runbook before operational acceptance.

Troubleshooting Guidance

Begin with the first observable difference from the expected result. Check architecture, scope, identities, prerequisites, and starting conditions separately, then correlate logs, events, commands, metrics, and configuration history. Treat the assumption that an unstated prerequisite or ownership gap causes the initial design to be incomplete as a hypothesis until a reproducible retest confirms the cause.

Validation Checklist

• The required architecture, scope, identities, prerequisites, and starting conditions were checked and recorded.
• The normal path and a course-specific exception were tested.
• The RHACM hub design, managed-cluster inventory, governance policies, GitOps placement plan, and fleet operations runbook links conclusions to commands, configuration, logs, metrics, or other objective evidence.
• Corrective actions, rollback, ownership, and handover notes are complete.

Lesson Outcome

Learners can apply RHACM Architecture, Hub Deployment, Cluster Discovery, Import, and Provisioning, explain the observed platform behavior, and support the result with a reviewable RHACM hub design, managed-cluster inventory, governance policies, GitOps placement plan, and fleet operations runbook.