What is volume in Docker?

In Docker, a volume is a mechanism for persistent data storage that allows data to be saved and used outside the lifecycle of containers. Volumes are stored on the host machine and can be attached to one or multiple containers.

Main features of volumes:

• Allow data to be preserved when containers are recreated.
• Can be used for data exchange between containers.
• Managed by Docker and isolated from the container's filesystem.

Example of using a volume in Docker CLI:

docker volume create mydata

docker run -v mydata:/app/data myimage

In Go, you can work with volumes through the Docker API, creating and mounting volumes when launching containers.