DockerのClientとServerのバージョン違いのエラーを直す

現象

$ docker version
Client version: 1.6.0
Client API version: 1.18
Go version (client): go1.4.2
Git commit (client): 4749651
OS/Arch (client): darwin/amd64
FATA[0000] Error response from daemon: client and server don't have same version (client : 1.18, server: 1.16)

対応方法

$ boot2docker upgrade
docker is up to date (1.6.0), skipping upgrade...
boot2docker is up to date (v1.6.0), skipping upgrade...
Latest release for github.com/boot2docker/boot2docker is v1.6.0
Downloading boot2docker ISO image...
Success: downloaded https://github.com/boot2docker/boot2docker/releases/	download/v1.6.0/boot2docker.iso
	to /Users/hina/.boot2docker/boot2docker.iso
Waiting for VM and Docker daemon to start...
................ooo
Started.
Writing /Users/hina/.boot2docker/certs/boot2docker-vm/ca.pem
Writing /Users/hina/.boot2docker/certs/boot2docker-vm/cert.pem
Writing /Users/hina/.boot2docker/certs/boot2docker-vm/key.pem
Your environment variables are already set correctly.

確認

$ docker version
Client version: 1.6.0
Client API version: 1.18
Go version (client): go1.4.2
Git commit (client): 4749651
OS/Arch (client): darwin/amd64
Server version: 1.6.0
Server API version: 1.18
Go version (server): go1.4.2
Git commit (server): 4749651
OS/Arch (server): linux/amd64