[piqiu@benjaminpro ~]$boot2docker start

Waiting for VM and Docker daemon to start...

..........................................................................oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

Started.

  Trying to get Docker socket one more time

Error requesting socket: exit status 255

Auto detection of the VM's Docker socket failed.

Please run `boot2docker -v up` to diagnose.

[piqiu@benjaminpro ~]$boot2docker ip

Failed to get VM Host only IP address.

	Was the VM initialized using boot2docker?

how to solved it?

i google the issue:https://github.com/boot2docker/boot2docker/issues/392

我发现是我在操作VirtualBox的时候把Port forwarding里的本机映射删除了。

解决方法：

[piqiu@benjaminpro ~]$boot2docker delete

[piqiu@benjaminpro ~]$boot2docker init

Initialization of virtual machine "boot2docker-vm" complete.

Use `boot2docker up` to start it.

[piqiu@benjaminpro ~]$boot2docker up

Waiting for VM and Docker daemon to start...

........................ooooooooooooooooooooooo

Started.

Writing /Users/piqiu1/.boot2docker/certs/boot2docker-vm/ca.pem

Writing /Users/piqiu1/.boot2docker/certs/boot2docker-vm/cert.pem

Writing /Users/piqiu1/.boot2docker/certs/boot2docker-vm/key.pem

Your environment variables are already set correctly.

[piqiu@benjaminpro ~]$boot2docker ip

192.168.59.103

[piqiu@benjaminpro ~]$boot2docker ssh

                        ##         .

                  ## ## ##        ==

               ## ## ## ## ##    ===

           /"""""""""""""""""\___/ ===

      ~~~ {~~ ~~~~ ~~~ ~~~~ ~~~ ~ /  ===- ~~~

           \______ o           __/

             \    \         __/

              \____\_______/

 _                 _   ____     _            _

| |__   ___   ___ | |_|___ \ __| | ___   ___| | _____ _ __

| '_ \ / _ \ / _ \| __| __) / _` |/ _ \ / __| |/ / _ \ '__|

| |_) | (_) | (_) | |_ / __/ (_| | (_) | (__|   <  __/ |

|_.__/ \___/ \___/ \__|_____\__,_|\___/ \___|_|\_\___|_|

Boot2Docker version 1.7.1, build master : c202798 - Wed Jul 15 00:16:02 UTC 2015

Docker version 1.7.1, build 786b29d