Docker: An error occurred trying to connect

Question

Installed Docker on Windows with 2 additional installs, Oracle VM VirualBox and Kitematic. I've disabled Hyper-V in my Windows 10 PC. Now the problem is I can't download any Docker images from DockerHub, not even I can run the command as

Docker info

At both ends it shows the following error.

An error occurred trying to connect: Get http://localhost:2375/v1.21/info: dial tcp 127.0.0.1:2375: ConnectEx tcp: No connection could be made because the target machine actively refused it.

If I run it in Docker QuickStart Terminal it works, but not working in PowerShell or in MSBuild.

Answer 1

If you are using windows command prompt instead of Docker QuickStart Terminal see official docs you should make following steps (assuming your docker machine has the name default):

1. docker-machine start default or create new one
2. docker-machine lswill show you your machine running

3. docker-machine env --shell cmd default and you'll see something like

   SET DOCKER_TLS_VERIFY=1
   SET DOCKER_HOST=tcp://192.168.99.100:2376
   SET DOCKER_CERT_PATH=C:\Users\Arseny\.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 default') DO %i
   

4. Run FOR /f "tokens=*" %i IN ('docker-machine env --shell cmd default') DO %i
5. Enjoy