After installing Docker, docker-machine env default fails because ca.pem is not found

Question

Just installed Docker, but docker-machine env default doesn't work:

$ docker-machine env default
open /Users/me/.docker/machine/machines/default/ca.pem: no such file or directory

The path /Users/me/.docker/machine/machines/default exists but there's no ca.pem in it. Just a bunch of other files.

Answer 1

You can also try regenerating the certificates for that docker-machine (eg default)

docker-machine regenerate-certs default
docker-machine restart default

Answer 2

Usually during the creation of a machine the certs are set up. Just create a new machine from scratch like:

docker-machine create --driver virtualbox dev
docker-machine env dev

That should work.

Answer 3

If you are connected to a VPN while creating the VM, that may cause networking issues that prevent the CA from being properly shared. Try disconnecting from any VPNs before creating the VM.