What are Docker Compose volumes and how do I use them?

What are Docker Compose volumes and how do I use them?

Docker Compose volumes are used to persist data generated by and used by Docker containers. They allow you to store data outside of the container's filesystem.

Can you give me an example of how to define a volume in a docker-compose.yml file?

Sure! Here's a simple example:

version: '3'
services:
  app:
    image: myapp
    volumes:
      - mydata:/data

volumes:
  mydata:

What happens to the data in the volume if I remove the container?

The data in the volume remains intact even if you remove the container. This is one of the main benefits of using volumes.

How can I inspect the data stored in a volume?

You can inspect the data by running a temporary container that mounts the volume. For example:

docker run --rm -v mydata:/data busybox ls /data