1、Get key
Key Path
c:\user\xxxooo\.docker\machine\machines\%%%%%
xxxooo user
%%%%% machine name
id_rsa This is key
2、Need vm ip、id_rsa
Get IP：
1. docker-machine ssh %%%%%
2. ifconfig
If need PPK：winscp can auto change id_rsa to ppk
3、last step login VM account：docker
===========
https://github.com/boot2docker/boot2docker
Docker Machine auto logs in using the generated SSH key, but if you want to SSH into the machine manually (or you're not using a Docker Machine managed VM), the credentials are:
user: docker
pass: tcuser