How to create docker registry mirror -

i use mac os x.and want use mirror in tutorial, step 1 need this:

docker --registry-mirror=http://<my-docker-mirror-host> -d 

but, when use command in terminal, did't work:

flag provided not defined: --registry-mirror see 'docker --help'.

then, use other way in tutorial:

you may able add --registry-mirror options docker_opts variable in /etc/default/docker

i don't know add docker_opts. want use mirror in client 1.7.0. can tell me how set mirror?.
use command create mirror:

docker run -d -p 5000:5000 -e registry_storage_filesystem_rootdirectory=/users/v11/documents/docker-registry --restart=always --name mirror -e standalone=false -e mirror_source=https://registry-1.docker.io -e mirror_source_index=https://index.docker.io registry 

i test , find didn't work describe can download local registry. if fail use command :

docker push localhost:5000/batman/ubuntu 

this command can work before, don't know happened. maybe flag "standalone=false" affect? want setup mirror, can tell me how do.thanks.

the problem command:

$ docker --registry-mirror=http://<my-docker-mirror-host> -d 

is intended configuring docker daemon, not docker client. in boot2docker (which you're presumably using), means need log boot2docker vm , run commands there.

you can log boot2docker vm boot2docker ssh. whilst stop daemon , restart new commands, it's best edit file /var/lib/boot2docker/profile used each time boot2docker restarts. add like:

extra_args="--registry-mirror=http://<my-docker-mirror-host>" 

if restart boot2docker, should go.