openstack builder: log which IP address SSH will use

builder/openstack/ssh.go

@@ -23,6 +23,7 @@ func CommHost(
 		// If we have a specific interface, try that
 		if sshinterface != "" {
 			if addr := sshAddrFromPool(s, sshinterface); addr != "" {
+				log.Printf("[DEBUG] Using IP address %s from specified interface %s for SSH", addr, sshinterface)
 				return addr, nil
 			}
 		}
@@ -30,15 +31,18 @@ func CommHost(
 		// If we have a floating IP, use that
 		ip := state.Get("access_ip").(*floatingip.FloatingIP)
 		if ip != nil && ip.IP != "" {
+			log.Printf("[DEBUG] Using floating IP %s for SSH", ip.IP)
 			return ip.IP, nil
 		}
 
 		if s.AccessIPv4 != "" {
+			log.Printf("[DEBUG] Using AccessIPv4 %s for SSH", s.AccessIPv4)
 			return s.AccessIPv4, nil
 		}
 
 		// Try to get it from the requested interface
 		if addr := sshAddrFromPool(s, sshinterface); addr != "" {
+			log.Printf("[DEBUG] Using IP address %s for SSH", addr)
 			return addr, nil
 		}