在 Windows 10 Home 中在 WSL 上设置 docker 的问题

Question

I am trying to setup docker through WSL (ubuntu) on Windows 10 Home but ran into an issue when trying to use the docker-compose up command:

$ docker-compose up
ERROR: Couldn't connect to Docker daemon at http://localhost:2375 - is it running?

I have the following configuration in my ~/.bashrc file

#Insert new Path for Docker and Alias

PATH="$HOME/bin:$HOME/.local/bin:$PATH"

PATH="$PATH:/mnt/c/Program Files/Docker Toolbox"

alias docker=docker.exe

alias docker-machine=docker-machine.exe

// Other code

export DOCKER_HOST='tcp://localhost:2375'

docker-machine seems to be running fine as the docker ps command shows a list of containers.

From my research, if I were to use Docker for Windows (which does not run on Windows Home) ; I need to turn on the “Expose daemon on tcp://localhost:2375 without TLS” option in the settings. Since I am using “Docker Toolbox + VirtualBox”, I would like to ask what would be the equivalent?

Please let me know if you require further information.

Answer 1

This is a bit tricky because yo need to use two terminals : one in Windows and one in WSL.

What worked for me : I installed docker-machine and virtualbox on Windows. Then I created a virtual machine named default on virtualbox. Then on Windows, with the terminal Git bash for windows, I ran the following commands :

1. docker-machine start default : it starts the virtual machine. Alternatively, you can start it directly on virtualbox
2. docker-machine env default : it shows the commands needed to start the linux shell.

Output looks like this

export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.101:2376"
export DOCKER_CERT_PATH="C:\Users\<yourusername>\.docker\machine\machines\default"
export DOCKER_MACHINE_NAME="default"
export COMPOSE_CONVERT_WINDOWS_PATHS="true"
# Run this command to configure your shell:
# eval $("C:\ProgramData\chocolatey\lib\docker-machine\bin\docker-machine.exe" env default)

Then you switch to WSL. You can access the terminal by typing ubuntu in the research bar

In /.bashrc, you paste the output (replace with your own output)

export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.101:2376"
export DOCKER_CERT_PATH="/mnt/c/Users/<yourusername>/.docker/machine/machines/default"
export DOCKER_MACHINE_NAME="default"
export COMPOSE_CONVERT_WINDOWS_PATHS="true"

Note that I changed the DOCKER_CERT_PATH so that it works on a linux environment

Finally, in WSL, run source /.bashrc

You can then test your install by running docker run hello-world Remember to keep your virtual machine running.

The following two articles really helped me with the install:

• https://www.sitepoint.com/docker-windows-10-home/
• https://www.paraesthesia.com/archive/2018/09/20/docker-on-wsl-with-virtualbox-and-docker-machine/