Docker - Production Patterns
You want to ensure a database schema is initialized before your main app container starts. How would you use an init container to achieve this?
You want to ensure a database schema is initialized before your main app container starts. How would you use an init container to achieve this?
hard📝 Workflow Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify init container use case
Init containers run setup tasks before main container starts, perfect for schema migration.Step 2: Compare options
Only Create an init container that runs a schema migration script before the main container starts uses init container to run migration before app starts, ensuring readiness.Final Answer:
Create an init container that runs a schema migration script before the main container starts -> Option CQuick Check:
Init container runs setup tasks before main app [OK]
Quick Trick: Use init container for pre-start setup tasks like migrations [OK]
Common Mistakes:
- Running migrations inside main container after start
- Using sidecar for sequential setup tasks
- Relying on manual migration outside Pod
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