问题
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.
回答1:
You can also try regenerating the certificates for that docker-machine (e.g. default)
docker-machine regenerate-certs default
docker-machine restart default
回答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.
回答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.
来源：https://stackoverflow.com/questions/32240742/after-installing-docker-docker-machine-env-default-fails-because-ca-pem-is-not