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Section 1
Define, build and modify container images
Preview
Preview: Application Design and Build (20%)
Preview includes- 4 of 6 lesson topics
- 1 overview segment
- 3 core concepts
- 2 exam tips
Lesson Topics
- Image references: tags and digests
- Dockerfile ENTRYPOINT and CMD
- Kubernetes command and args overrides
- Image pull policies
Overview
Work confidently with OCI-compatible images: reference the intended artifact, understand how Kubernetes starts the image, and diagnose pull or architecture failures.
Core Concepts
- Tags are human-friendly but mutable; a digest such as `image@sha256:...` identifies immutable image content.
- `imagePullPolicy` controls kubelet pull behavior: `Always`, `IfNotPresent`, or `Never`; it does not make a mutable tag immutable.
- If `imagePullPolicy` is omitted, Kubernetes sets a default when the object is first created; changing the image tag later does not automatically recalculate that field.
Exam Tips
- Use `kubectl describe pod <pod>` first for pull errors; Events usually name the exact failure.
- When exact bytes matter, use a digest instead of trying to freeze a tag with pull policy.
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Section 2
Choose and use the right workload resource
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Section 3
Understand multi-container Pod design patterns
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Section 4
Utilize persistent and ephemeral volumes
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Section 5
Use Kubernetes primitives to implement common deployment strategies
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Section 6
Understand Deployments and perform rolling updates
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Section 7
Use the Helm package manager to deploy existing packages
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Section 8
Use Kustomize
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Section 9
Understand API deprecations
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Section 10
Implement probes and health checks
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Section 11
Use built-in CLI tools to monitor Kubernetes applications
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Section 12
Utilize container logs
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Section 13
Debugging in Kubernetes
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Section 14
Discover and use resources that extend Kubernetes
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Section 15
Understand authentication, authorization and admission control
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Section 16
Understand requests, limits and quotas
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Section 17
Understand ConfigMaps
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Section 18
Define resource requirements
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Section 19
Create and consume Secrets
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Section 20
Understand ServiceAccounts
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Section 21
Understand Application Security
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Section 22
Demonstrate basic understanding of NetworkPolicies
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Section 23
Provide and troubleshoot access to applications via Services
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Section 24
Use Ingress rules to expose applications
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