Question 83791 in Docker Question posted in
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delete docker volume does not remvoe the local file

I run a docker container of nginx with the following: docker container run -d --name nginx3 -p 85:80 -v $(pwd):/usr/share/nginx/html nginx , then when I add files in the container volume (/usr/share/nginx/html) they are also added locally on the $pwd folder.

But when I remove the container, image, and volume with docker rm -vf $(docker ps -aq) && docker rmi -f $(docker images -aq) && docker volume prune the files on my local $pwd folder are still there.. why were they not deleted when I removed the volume?

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2

Answers


  1. 0

    That’s because docker volume prune delete the docker volumes and not the mounted volumes from the host.

    If you define a volume with docker volume create nginx_volume and then use

    docker container run -d --name nginx3 -p 85:80 -v nginx_volume:/usr/share/nginx/html nginx

    the volume will be deleted

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  2. 0

    You are not using a docker volume, you are using a bind mount. This was not that clear with the -v syntax, that’s why docker recommends the new --mount syntax for new users:

    This creates a bind mount from the host OS. Docker is not owner of it and therefore not deleting the folder if you unmount the binding.

     docker run -d 
  -it 
  --name devtest 
  --mount type=bind,source="$(pwd)"/target,target=/app 
  nginx:latest

    Further reading

    This creates a docker volume, which is managed by docker. And therefore all volume-commands can be applied:

     docker run -d 
  --name devtest 
  --mount source=myvol2,target=/app 
  nginx:latest

    Further reading

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