minikube + Docker Volumes?

Question

With regular native Docker on Mac, without minikube, I can take the official example from https://docs.docker.com/engine/admin/volumes/volumes/#start-a-container-with-a-volume

run:

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

Then I can run docker inspect devtest and see that the mount was created:

"Mounts": [
    {
        "Type": "volume",
        "Name": "myvol2",
        "Source": "/var/lib/docker/volumes/myvol2/_data",
        "Destination": "/app",
        "Driver": "local",
        "Mode": "",
        "RW": true,
        "Propagation": ""
    }
],

I can run docker volume ls and see myvol2

If I am using the latest minikube, currently v0.22.3, with a fresh minikube local VM:

minikube delete
rm -rf ~/.kube 
rm -rf ~/.minikube 
minikube start

Starting local Kubernetes v1.7.5 cluster...

Then use the minikube VM version of Docker with eval $(minikube docker-env), then repeat the same command from earlier:

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

Then docker inspect devtest comes back with an empty mounts section: "Mounts": []. and docker volume ls shows no myvol2. In other words, the Docker volumes seem to simply not work with minikube.

FYI, here is the output of docker version when working with Minikube v0.22.3:

Client:
 Version:      17.06.2-ce
 API version:  1.23
 Go version:   go1.8.3
 Git commit:   cec0b72
 Built:        Tue Sep  5 20:12:06 2017
 OS/Arch:      darwin/amd64

Server:
 Version:      1.12.6
 API version:  1.24 (minimum version )
 Go version:   go1.6.4
 Git commit:   78d1802
 Built:        Wed Jan 11 00:23:16 2017
 OS/Arch:      linux/amd64
 Experimental: false

Answer 1

https://github.com/kubernetes/minikube/issues/3001#issuecomment-446055883 may be the answer. Volume should be in minikube env in this case. As they mention in the link above:

So you have to mount your folder(host) into minikube(vm) first (use minikube mount), so the docker can access it.