Kubernetes Fundamentals and Cluster Operations — Lesson 1: Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces

Learning Objectives

• Assess dependencies, controls, resilience, and the intended service outcome for Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces.
• Demonstrate the workflow and leave reproducible evidence in cluster architecture diagram and kubectl access verification.
• Recommend a preventive improvement after resolving a manifest being applied to the wrong context and namespace.

Detailed Topics

• Container concepts
• Images
• Registries
• Runtime basics
• Kubernetes architecture
• Control plane
• Worker nodes
• API objects
• Kubectl
• Manifests
• And namespaces
• Decision ownership, prerequisites, and acceptance evidence for Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces
• Relevant access, security, capacity, dependency, performance, recovery, and support considerations

Instructor Demonstration

The demonstration traces Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces from requirement through execution and review. Learners see where evidence should be collected, how cluster architecture diagram and kubectl access verification supports validation, and which warning signs require investigation.

Hands-On Exercise

Configure and test Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces with representative infrastructure or application data. Use “a manifest being applied to the wrong context and namespace” as the troubleshooting challenge, compare hypotheses, retest the affected path, and complete cluster architecture diagram and kubectl access verification for review.

1. Map the current workflow and mark where the expected result can first be observed.
2. Run the scenario while preserving timestamps, object identifiers, and relevant output.
3. Apply a reversible correction only after evidence supports the cause.
4. Retest the original case plus an unaffected case and update the handover record.

Scenario Analysis

• Clarify the service trigger, affected components and roles, prerequisites, and acceptable result for Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces.
• Compare at least two implementation or correction choices and identify which evidence would distinguish them.
• Decide how cluster architecture diagram and kubectl access verification should be reviewed, approved, retained, and handed to the next owner.

Troubleshooting Guidance

For a failure in Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces, separate access, configuration, compute, network, storage, integration, and timing causes. Compare the observed sequence with cluster architecture diagram and kubectl access verification; if “a manifest being applied to the wrong context and namespace” is confirmed, document why broader changes were rejected.

Validation Checklist

• The scope of Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces is clear, including what is deliberately excluded from the test.
• Evidence in cluster architecture diagram and kubectl access verification supports each material decision and outcome.
• A negative test demonstrates that controls reject or expose an invalid condition.
• Open risks, owners, due actions, and production safeguards are documented.

Lesson Outcome

Learners can apply Container concepts, images, registries, runtime basics, Kubernetes architecture, control plane, worker nodes, API objects, kubectl, manifests, and namespaces, explain the decisions made, and defend the result with cluster architecture diagram and kubectl access verification.