[VCL-816] Nmap is very slow due to DNS

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.4
• Component/s: vcld (backend)
• Assignee: Andrew Kurth
• Reporter: Andrew Kurth
• Created: 10/Feb/15 23:42
• Updated: 24/Feb/15 18:44
• Resolved: 24/Feb/15 18:44

Description

The backend code uses the nmap utility to determine if a remote node is responding to SSH. This may take several seconds if DNS isn't configured. There is a "-n" switch which causes the commands to run much quicker.

The switch should probably be added. We need to test how it works with both hostnames and IP addresses.