[LIBCLOUD-461] fix ssh for servers with PubkeyAuthentication only

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Assignee: Unassigned
• Reporter: Markos Gogoulos
• Created: 13/Dec/13 15:21
• Updated: 09/Jan/14 00:45
• Resolved: 09/Jan/14 00:45

Description

On libcloud/compute/ssh.py we specify password OR public key to ssh to a cloud server. This results in deploy_node to fail to ssh to a server where it allows PubkeyAuthentication only (example HPCloud servers).

However there's no need to specify only one of the two, both can be specified. Paramiko's authentication is attempted in the following order of priority:

(from paramiko/paramiko/client.py)

public key(s) passed,
any key found through an SSH agent,
any "id_rsa" or "id_dsa" key discoverable in ~/.ssh/,
plain username/password auth, if a password was given

I've tried the patch on several backends (including HPCloud) and it worked without issues