RH174 Managing CentOS Migrations and RHEL Upgrades — Lesson 1: CentOS Estate Discovery, Compatibility, Risk, Support, and Migration Strategy

Learning Objectives

• Interpret the architecture, dependencies, and expected behavior of estate discovery, compatibility, and risk assessment.
• Apply support requirements and migration strategy while preserving reviewable technical evidence.
• Recognize and correct the risk where a hidden prerequisite causes the first configuration step to produce an incomplete result.

Detailed Topics

• estate discovery: apply the concept to an enterprise Linux team moving supported workloads from CentOS to RHEL with minimal service risk, record the relevant settings or decisions, and explain the operational consequence.
• compatibility: apply the concept to an enterprise Linux team moving supported workloads from CentOS to RHEL with minimal service risk, record the relevant settings or decisions, and explain the operational consequence.
• risk assessment: apply the concept to an enterprise Linux team moving supported workloads from CentOS to RHEL with minimal service risk, record the relevant settings or decisions, and explain the operational consequence.
• support requirements: apply the concept to an enterprise Linux team moving supported workloads from CentOS to RHEL with minimal service risk, record the relevant settings or decisions, and explain the operational consequence.
• migration strategy: apply the concept to an enterprise Linux team moving supported workloads from CentOS to RHEL with minimal service risk, record the relevant settings or decisions, and explain the operational consequence.

Instructor Demonstration

The instructor demonstrates centos estate discovery, compatibility, risk, support, and migration strategy by tracing the relevant architecture, commands, configuration, messages, and evidence. The walkthrough highlights how a hidden prerequisite causes the first configuration step to produce an incomplete result and shows how to isolate the cause without masking dependent issues.

Hands-On Exercise

Build a baseline and capture the initial state for CentOS Estate Discovery, Compatibility, Risk, Support, and Migration Strategy. Add verified outcomes to the migration inventory, conversion and upgrade plan, test evidence, rollback procedure, and lifecycle roadmap.

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 estate discovery in the stated scenario.
• Compare two approaches for support requirements and explain the security, reliability, and support trade-offs.
• Decide what evidence must be retained in the migration inventory, conversion and upgrade plan, test evidence, rollback procedure, and lifecycle roadmap before operational acceptance.

Troubleshooting Guidance

Begin with the first observable difference from the expected result. Check architecture, access, dependencies, and starting conditions separately, then correlate logs, events, commands, and configuration history. Do not accept the initial assumption that a hidden prerequisite causes the first configuration step to produce an incomplete result; confirm the cause with a reproducible retest.

Validation Checklist

• The required architecture, access, dependencies, and starting conditions were checked and recorded.
• The normal path and a course-specific exception were tested.
• The migration inventory, conversion and upgrade plan, test evidence, rollback procedure, and lifecycle roadmap 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 CentOS Estate Discovery, Compatibility, Risk, Support, and Migration Strategy, explain the observed Red Hat platform behavior, and support the result with a reviewable migration inventory, conversion and upgrade plan, test evidence, rollback procedure, and lifecycle roadmap.