Docker - in CI/CD
Which Dockerfile instruction creates a new layer that can be cached during CI builds?
Which Dockerfile instruction creates a new layer that can be cached during CI builds?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Review Dockerfile instructions and layers
Each Dockerfile instruction creates a layer, but RUN executes commands creating filesystem changes.Step 2: Identify which instruction affects caching
RUN creates layers with changes that can be cached; ENV and LABEL set metadata, CMD sets runtime command.Final Answer:
RUN -> Option BQuick Check:
Layer-creating instruction = RUN [OK]
Quick Trick: RUN commands create cacheable layers in Dockerfile [OK]
Common Mistakes:
- Confusing CMD with layer creation
- Thinking ENV creates large cache layers
- Assuming LABEL affects caching
Master "in CI/CD" in Docker
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