Docker - Production Patterns
Which of the following Docker Compose service definitions correctly adds a restart policy for production use?
Which of the following Docker Compose service definitions correctly adds a restart policy for production use?
easy📝 Configuration Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Review Docker restart policies
Valid restart policies include 'no', 'always', 'on-failure', and 'unless-stopped'. 'always' restarts the container whenever it stops.Step 2: Identify correct syntax
'restart: always' is valid and commonly used in production. 'restart: never' is invalid, 'sometimes' is not a valid policy, and 'on-failure 5' is incorrect syntax (should be 'on-failure:5' for max retries).Final Answer:
restart: always -> Option DQuick Check:
Valid restart policy = restart: always [OK]
Quick Trick: Use 'restart: always' for reliable container restarts [OK]
Common Mistakes:
- Using invalid restart policies like 'sometimes'
- Incorrect syntax for max retry counts
- Confusing 'never' with 'no'
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