CODEWITHSUNDEEP
dockerdocker-composemounted-volumes
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Reputation: 1574

Docker-Compose volume syntax with source folder missing

I am struggling to understand the following syntax in docker-compose yml for the volumes.

cache:
  build: ../../
  dockerfile: docker/dev/Dockerfile
  volumes:
    - /tmp/cache:/cache
    - /build
  entrypoint: "true"

The first volume /cache is clearly mounted to physical folder /tmp/cache on the host. Where is it mounted the second one /build instead? I could not find good references.

thanks.

Upvotes: 0

Views: 363

Answers (2)

K. Railis
K. Railis

Reputation: 184

The second volume will be what is described as an anonymous volume. Usually they live under the /var/lib/docker directory, unless you have made a different configuration.

I believe you will find this anwser useful.

Upvotes: 1

GintsGints
GintsGints

Reputation: 855

With one path this is a "anonymous" volume. Docker will create that value for you. You can read more here

Upvotes: 1

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