Containers, Kubernetes, and Red Hat OpenShift Administration II (DO285) – 4.6 — Lesson 1: Containers, Podman, Images, Registries, Storage, Networking, and Security

Learning Objectives

• Explain the structures, services, data, settings, roles, and dependencies governing Podman and images and registries.
• Implement and validate container storage, container networking, and container security using reviewable evidence.
• Evaluate the condition where the observed result differs from the approved configuration because a prerequisite, permission, dependency, or sequence was missed and select a proportionate corrective response.

Detailed Topics

• Podman applied to the course scenario, expected platform behavior, dependencies, controls, and evidence.
• images and registries applied to the course scenario, expected platform behavior, dependencies, controls, and evidence.
• container storage applied to the course scenario, expected platform behavior, dependencies, controls, and evidence.
• container networking applied to the course scenario, expected platform behavior, dependencies, controls, and evidence.
• container security applied to the course scenario, expected platform behavior, dependencies, controls, and evidence.

Instructor Demonstration

The instructor traces an administrator progressing from container operations to production OpenShift cluster configuration in one integrated learning path. The walkthrough connects navigation, commands, configuration logic, system messages, and evidence captured in the integrated container and OpenShift administration portfolio, cluster baseline, and troubleshooting runbook. It also tests the exception where the observed result differs from the approved configuration because a prerequisite, permission, dependency, or sequence was missed.

Hands-On Exercise

Complete a controlled Red Hat exercise covering Containers, Podman, Images, Registries, Storage, Networking, and Security and preserve the verified result in the integrated container and OpenShift administration portfolio, cluster baseline, and troubleshooting runbook.

1. Confirm scope, prerequisites, versions, identities, dependencies, and acceptance criteria.
2. Execute the workflow while recording commands, settings, outputs, events, and system messages.
3. Test normal behavior, one boundary condition, and the stated exception.
4. Document corrections, evidence, ownership, retest criteria, rollback, and handover actions.

Scenario Analysis

• Identify which object, service, policy, setting, or sequence most strongly influences Podman.
• Compare two defensible responses and explain technical, security, operational, and support trade-offs.
• Determine how the integrated container and OpenShift administration portfolio, cluster baseline, and troubleshooting runbook should be approved, retained, retested, and updated.

Troubleshooting Guidance

Start where expected behavior first differs from the observed result. Check prerequisites, identity, configuration order, version compatibility, connectivity, status, resource limits, and evidence separately. Treat “the observed result differs from the approved configuration because a prerequisite, permission, dependency, or sequence was missed” as a hypothesis until commands, logs, settings, and retest outcomes confirm the cause.

Validation Checklist

• Required platform components, identities, permissions, settings, and dependencies are present.
• The integrated container and OpenShift administration portfolio, cluster baseline, and troubleshooting runbook connects each conclusion to objective, reviewable evidence.
• Normal processing, a boundary condition, dependency behavior, and the stated exception were tested.
• Corrections, ownership, retest criteria, rollback, documentation, and operational handover are complete.

Lesson Outcome

Learners can apply Containers, Podman, Images, Registries, Storage, Networking, and Security, explain the resulting platform behavior, and defend the outcome through the integrated container and OpenShift administration portfolio, cluster baseline, and troubleshooting runbook.