SSH logon impossible after fresh Docker for azure deploy

General
1

Hello,

I’ve spent the whole day on this so any help would be greatly appreciated.

I followed the install guidelines for docker for azure (https://docs.docker.com/docker-for-azure/) and installed the docker CE stable channel successfully on azure.

Next step is trying to connect to the manager node using following command

ssh -i “E:\temp\DockerKeys\private.ppk” -p 50000 docker@51.144.118.xxx

but this always fails with following error.

Unable to negotiate with 51.144.118.xxx port 50000: no matching host key type found. Their offer: ssh-rsa,rsa-sha2-512,rsa-sha2-256

I generated the public/private key pair using putty key generator and entered the public key in the deploy template.

The type of key is SSH2 RSA. I also tried to use SSH1, but this fails on deployment (The value of parameter linuxConfiguration.ssh.publicKeys.keyData is invalid.)
I tried with a shorter SSH2 RSA key of 512 but get the same error.

Steps to reproduce the behavior

  1. Launch Microsoft Azure

  2. Generate public private key using putty key generator and use the public key + other parameters as input for the template.

  3. Find the public ip of the manager node and try to connect using the private key

Thanks in advance for any help.