Prompt
Do I need persistent volumes for a Docker app?
Latest observation
Oct 7, 2026
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Not always.
You need a persistent volume in Docker only if your app must keep data after a container is removed, recreated, or updated.
Use a persistent volume if your app stores:
- databases or other stateful data
- user uploads
- config files that should survive restarts
- logs you want to retain
- caches you don’t want lost between container rebuilds
You usually do not need one if your app is:
- stateless
- can recreate all data on startup
- only serves code/static assets
- fine with losing data when the container is deleted
Common examples
- Need volume: PostgreSQL, MySQL, Redis with persistence, file uploads
- No volume needed: a simple web frontend, API server with no local storage
Rule of thumb
If the data matters and should survive docker rm, docker compose down, image rebuilds, or crashes, use a volume.
If you want, I can help you decide for your specific Docker app.