Docker containers are designed to be disposable, offering the flexibility to stop, start, and restart containers multiple times during the lifespan of an application. This feature allows for seamless upgrades or patches and supports portability and consistency. However, this can be a double-edged sword; as any changes made to the container since its last started state will be lost.
Thankfully, by using Docker volumes or bind mounts, you can have the best of both worlds; these features let containers hold onto their data through all the changes and states. This allows you to combine the flexibility of temporary containers with the stability of lasting data storage.
Before diving into the technicals of Docker volumes, it is essential to understand their significance and how they contribute to managing data in containers.
Docker volumes are a feature of Docker that provide a way to persistently store and manage…