Volumes vs. Bind Mounts: A Pragmatic Guide to Container Storage
Containers are ephemeral by design. Spin one up, run your app, tear it down. That's the beauty. But it's also the curse when you pull data to survive a restart or a redeploy. You've got two main options: volumes and bind mounts. Both let you persist data outside the container's writable layer, but they labor differently and serve distinct purposes. Here's the thing: most tutorials gloss over this. They just say 'use a volume' and shift on. That leaves you guessing when bits break. So let's look at what's concretely going on, where your data ends up, and how to craft a choice you won't regret at 2 a.m. amid an outage. Where Your Data Goes When a Container Dies The container’s writable layer, and why it’s disposable Every container you run has a thin writable layer on top of its image.