CS229 Deploying Production AWS ROSA Clusters: Creation, Configuration, and Application Integration — Lesson 4: Observability, Scaling, Upgrades, Troubleshooting, Cost, and Operations

Learning Objectives

• Operate, troubleshoot, document, and improve observability, scaling, and upgrades.
• Apply troubleshooting and cost and operations while preserving reviewable technical evidence.
• Recognize and correct the risk where the technical fix is successful but monitoring, rollback, ownership, or handover remains incomplete.

Detailed Topics

• observability: apply the concept to a cloud platform team deploying a production ROSA cluster and onboarding a business application, record the relevant settings or decisions, and explain the operational consequence.
• scaling: apply the concept to a cloud platform team deploying a production ROSA cluster and onboarding a business application, record the relevant settings or decisions, and explain the operational consequence.
• upgrades: apply the concept to a cloud platform team deploying a production ROSA cluster and onboarding a business application, record the relevant settings or decisions, and explain the operational consequence.
• troubleshooting: apply the concept to a cloud platform team deploying a production ROSA cluster and onboarding a business application, record the relevant settings or decisions, and explain the operational consequence.
• cost and operations: apply the concept to a cloud platform team deploying a production ROSA cluster and onboarding a business application, record the relevant settings or decisions, and explain the operational consequence.

Instructor Demonstration

The instructor demonstrates observability, scaling, upgrades, troubleshooting, cost, and operations by tracing the relevant architecture, commands, configuration, messages, and evidence. The walkthrough highlights how the technical fix is successful but monitoring, rollback, ownership, or handover remains incomplete and shows how to isolate the cause without masking dependent issues.

Hands-On Exercise

Run an operational review and produce support-ready evidence for Observability, Scaling, Upgrades, Troubleshooting, Cost, and Operations. Add verified outcomes to the ROSA production design, cluster deployment evidence, application integration record, and operations runbook.

1. Confirm the scope, versions, access, dependencies, and success criteria.
2. Perform the workflow while recording commands, settings, output, and platform events.
3. Test one expected case and one controlled exception specific to this lesson.
4. Retest the correction and document ownership, rollback, and follow-up actions.

Scenario Analysis

• Identify which dependency most strongly influences observability in the stated scenario.
• Compare two approaches for troubleshooting and explain the security, reliability, and support trade-offs.
• Decide what evidence must be retained in the ROSA production design, cluster deployment evidence, application integration record, and operations runbook before operational acceptance.

Troubleshooting Guidance

Begin with the first observable difference from the expected result. Check monitoring, troubleshooting, rollback, ownership, and handover separately, then correlate logs, events, commands, and configuration history. Do not accept the initial assumption that the technical fix is successful but monitoring, rollback, ownership, or handover remains incomplete; confirm the cause with a reproducible retest.

Validation Checklist

• The required monitoring, troubleshooting, rollback, ownership, and handover were checked and recorded.
• The normal path and a course-specific exception were tested.
• The ROSA production design, cluster deployment evidence, application integration record, and operations runbook links conclusions to commands, configuration, logs, or other objective evidence.
• Corrective actions, rollback steps, ownership, and handover notes are complete.

Lesson Outcome

Learners can apply Observability, Scaling, Upgrades, Troubleshooting, Cost, and Operations, explain the observed Red Hat platform behavior, and support the result with a reviewable ROSA production design, cluster deployment evidence, application integration record, and operations runbook.