DockerToolbox for win7服务不可用错误

在CMD上运行docker ps时，最初出现错误

 An error occurred trying to connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v 1.23/containers/json: open //./pipe/docker_engine: The system cannot find the fi le specified. 

按照这里的步骤

 C:\Users\kkk>docker-machine start default Starting "default"... Machine "default" is already running. C:\Users\kkk>docker-machine env default SET DOCKER_TLS_VERIFY=1 SET DOCKER_HOST=tcp://192.168.99.100:2376 SET DOCKER_CERT_PATH=C:\Users\kkk\.docker\machine\machines\default SET DOCKER_MACHINE_NAME=default REM Run this command to configure your shell: REM @FOR /f "tokens=*" %i IN ('docker-machine env default') DO @%i C:\Users\kkk>docker-machine env --shell cmd SET DOCKER_TLS_VERIFY=1 SET DOCKER_HOST=tcp://192.168.99.100:2376 SET DOCKER_CERT_PATH=C:\Users\kkk\.docker\machine\machines\default SET DOCKER_MACHINE_NAME=default REM Run this command to configure your shell: REM @FOR /f "tokens=*" %i IN ('docker-machine env --shell cmd') DO @%i C:\Users\kkk>@FOR /f "tokens=*" %i IN ('docker-machine.exe env --shell cmd') DO @%i 

现在，当我再次尝试docker ps时，出现以下错误

 An error occurred trying to connect: Get https://192.168.99.100:2376/v1.23/conta iners/json: Service Unavailable 

注意：机器在公司代理之后