docker-py/docs/volumes.md

Using volumes

Volume declaration is done in two parts. First, you have to provide a list of mountpoints to the Client().create_container() method.

c.create_container('busybox', 'ls', volumes=['/mnt/vol1', '/mnt/vol2'])

Volume mappings are then declared inside the Client.start method like this:

c.start(container_id, binds={
    '/home/user1/':
        {
            'bind': '/mnt/vol2',
            'ro': False
        },
    '/var/www':
        {
            'bind': '/mnt/vol1',
            'ro': True
        }
})