Docker - Security
Which Dockerfile snippet correctly creates a non-root user 'appuser' with UID and GID 1500 and sets it as the container user?
Which Dockerfile snippet correctly creates a non-root user 'appuser' with UID and GID 1500 and sets it as the container user?
hard📝 Workflow Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Create group and user with specific IDs
Use addgroup and adduser with -g and -u flags to set GID and UID.Step 2: Set USER to 'appuser'
USER instruction sets the container runtime user.Step 3: Verify other options
RUN useradd -r appuser USER 1500 lacks group creation and uses USER with UID only; C sets USER before group; D sets USER to root.Final Answer:
RUN addgroup -g 1500 appuser && adduser -u 1500 -G appuser -D appuser USER appuser -> Option BQuick Check:
Create user/group with IDs, then set USER [OK]
Quick Trick: Create user/group with IDs, then USER [OK]
Common Mistakes:
- Setting USER before creating user
- Not specifying UID/GID explicitly
- Running container as root unintentionally
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