Docker - Security
You attempt to run a container with USER set to 'developer' but get: 'user developer not found'. What is the most probable reason?
You attempt to run a container with USER set to 'developer' but get: 'user developer not found'. What is the most probable reason?
medium📝 Troubleshoot Q6 of 15
Step-by-Step Solution
Solution:
Step 1: USER instruction requires existing user
The specified user must exist inside the image.Step 2: Error indicates missing user
'user developer not found' means the user was not created.Final Answer:
The user 'developer' is not created in the image -> Option BQuick Check:
User must exist in image before use [OK]
Quick Trick: USER must exist in image [OK]
Common Mistakes:
- Assuming USER works without user creation
- Blaming Docker daemon or ENTRYPOINT
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