docker-machine install fails due to 'Couldn't read CA cert' error

Question

I am trying to setup docker-machine locally on my Windows machine and I followed the install instructions at the Docker Machine Page.

Per the instructions, I ran the following commands in my bash terminal

To install Docker client binary

$curl -L https://github.com/docker/machine/releases/download/v0.3.0/docker-machine_windows-amd64.exe > /bin/docker-machine

and to install Docker machine binary

$ curl -L https://github.com/docker/machine/releases/download/v0.3.0/docker-machine_windows-amd64.exe > /bin/docker-machine

when I try to run docker-machine -v I get the following error

FATAL[0000] Couldn't read ca cert 'C:\Users\Me\.boot2docker\certs\boot2doker-vm\ca.pm: open 'C:\Users\Me\.boot2docker\certs\boot2docker-vm'\ca.pem: The filename, directory name, or volume label syntax is incorrect.

I did some searching and came across a few posts, but can't really see any connection to what would be causing my issues...

https://github.com/hypriot/kitematic/pull/1

https://github.com/docker/machine/issues/908

Answer 1

I got the same answer and was able to resolve it by changing the path pattern to be unix-style in the environment variable.

Inside msysgit bash shell:

export DOCKER_CERT_PATH=/C/Users/Me/.boot2docker/certs/boot2docker-vm

This resolved boot2docker.

Note that I also tried using docker-machine before using boot2docker which previously failed with the same error. That was not resolved the same way boot2docker could be resolved. For now only boot2docker is working for me.

Answer 2

Its referring to boot2docker environment.

see this: DOCKER_CERT_PATH="/Users//.docker/machine/machines/dev"

Answer 3

I installed docker machine today on my Windows 7 machine and run the command without any problem.

Did you use boot2docker before on your machine? If you did, it might be related as mine is a clean machine without any pre-existing docker installations.