DO256 – Red Hat OpenShift Virtualization Administration II: Configuring Production Virtual Machines — Lesson 1: Production VM Architecture, RBAC, Instance Types, Templates, and Boot Sources

Learning Objectives

• Explain the architecture, purpose, dependencies, and expected behavior of production architecture, RBAC, and instance types.
• Apply templates and boot sources 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

• production architecture: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.
• RBAC: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.
• instance types: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.
• templates: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.
• boot sources: apply the concept to the course scenario, identify dependencies and controls, and record objective evidence of the result.

Instructor Demonstration

The instructor demonstrates production vm architecture, rbac, instance types, templates, and boot sources 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 Production VM Architecture, RBAC, Instance Types, Templates, and Boot Sources and add the verified result to the production VM architecture, RBAC and network design, backup and migration evidence, and resilience 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 production architecture in the stated scenario.
• Compare two approaches for templates and explain the security, reliability, performance, and support trade-offs.
• Decide what evidence must be retained in the production VM architecture, RBAC and network design, backup and migration evidence, and resilience 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 production VM architecture, RBAC and network design, backup and migration evidence, and resilience 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 Production VM Architecture, RBAC, Instance Types, Templates, and Boot Sources, explain the observed platform behavior, and support the result with a reviewable production VM architecture, RBAC and network design, backup and migration evidence, and resilience runbook.