How to persist data between container runs? (junior)

To keep data from disappearing when a container is recreated, it is moved outside the container using volumes or bind mounts.

#Two main approaches (junior)

#1. Docker volume (the best option for production)

The data is stored outside the container, but managed by Docker.

#2. Bind mount (mounting a host folder)

The data lives directly on the host, and the container simply uses it.

#What this gives you

• data doesn't disappear on docker stop, docker rm, or when the image is rebuilt;
• other containers can connect to it;
• it's convenient for backups.

#Summary

To persist data between container runs, use a volume or bind mount - they move the data outside the container so it doesn't get lost.

If needed, I can draw a simple diagram or show how to check a volume with docker volume ls.