docker-machine doesn't work with this version of OpenSSH

[WojtekKozaczynski]

"OpenSSH for Windows" version
0.0.10.0

OS details
Windows 10 Pro

What is failing
A detailed description of the issue is in the docker/machine repo @ docker/machine#4053.

The summary is that when OpenSSH is installed on Windows 10 the docekr-machine tries to use it to communicate with the Hyper-V VMs it creates and manages, and the Win32 OpenSSH implementation fails.

Repro steps are

• Install Windows Docker toolkit
• Install OpenSSH following the guidelines at https://github.com/PowerShell/Win32-OpenSSH/wiki/Install-Win32-OpenSSH, including adding it to the Path
• In Hyper-V Manager create (if you don’t have one) a Virtual Switch and connect it to an external network device (either the WiFi card or local network card)
• Start Docker
• Execute “docker-machine -debug create -d hyperv --hyperv-virtual-switch ” command

The last command hangs when the docker-machine tries to open an SSH connection to the newly created VM.

Cheers, Wojtek

[manojampalam]

I looked into this. Apparently, docker is launching ssh with the following commandline:

ssh.exe -F /dev/null -o PasswordAuthentication=no -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=quiet -o ConnectionAttempts=3 -o ConnectTimeout=10 -o ControlMaster=no -o ControlPath=none docker@10.123.171.161 -o IdentitiesOnly=yes -i C:\Users\manojamp.docker\machine\machines\localhost\id_rsa -p 22 "exit 0"

There are certain Unix specific elements in the command line (/dev/null) that are not mapped in the Windows port yet. Targeting a fix for April-End.

[bagajjal]

Please check the may end release.