Answer
They run setup logic before main containers start.
Quick Answer
Init containers run to completion before the main container starts. They're used for: waiting for a database to be ready before the app starts, running schema migrations, downloading config files, setting up permissions. If an init container fails, Kubernetes restarts the Pod. This decouples initialization from the main app logic cleanly.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ