Volume inspect information was changed in Docker version 1.8 from a "Volumes" list to a new "Mounts" array. See my previous volume parsing post for parsing on Docker <=1.7

Getting a list of volume paths

The Mounts section, if you do docker inspect <container name or id>, is structured like this:

    "Mounts": [
        {
            "Name": "e6c202f832b24e488cedfd0e134db439496c245a4d28f8d6345bb18f55aa61b4",
            "Source": "/var/lib/docker/volumes/e6c202f832b24e488cedfd0e134db439496c245a4d28f8d6345bb18f55aa61b4/_data",
            "Destination": "/dirinmycontainer",
            "Driver": "local",
            "Mode": "",
            "RW": true
        }
    ],

To list all volumes and associated container paths for a docker (1.8.x) container, using go templating:

docker inspect --format='{{range $mount := .Mounts}}{{$mount.Source}} -> {{$mount.Destination}}{{"\n"}}{{end}}' <container name or id>

which will return

/var/lib/docker/volumes/e6c202f832b24e488cedfd0e134db439496c245a4d28f8d6345bb18f55aa61b4/_data -> /dirinmycontainer