Merge pull request #353 from nak3/assign-ip

Assign IP address when network device is specified

client/fingerprint/network_unix.go

@@ -34,11 +34,13 @@ func (f *NetworkFingerprint) Fingerprint(cfg *config.Config, node *structs.Node)
 	// newNetwork is populated and addded to the Nodes resources
 	newNetwork := &structs.NetworkResource{}
 	defaultDevice := ""
+	ip := ""
 
 	// 1. Use user-defined network device
 	// 2. Use first interface found in the system for non-dev mode. (dev mode uses lo by default.)
 	if cfg.NetworkInterface != "" {
 		defaultDevice = cfg.NetworkInterface
+		ip = f.ipAddress(defaultDevice)
 	} else {
 
 		intfs, err := net.Interfaces()
@@ -48,19 +50,19 @@ func (f *NetworkFingerprint) Fingerprint(cfg *config.Config, node *structs.Node)
 
 		for _, i := range intfs {
 			if (i.Flags&net.FlagUp != 0) && (i.Flags&(net.FlagLoopback|net.FlagPointToPoint) == 0) {
-				if ip := f.ipAddress(i.Name); ip != "" {
+				if ip = f.ipAddress(i.Name); ip != "" {
 					defaultDevice = i.Name
-					node.Attributes["network.ip-address"] = ip
-					newNetwork.IP = ip
-					newNetwork.CIDR = newNetwork.IP + "/32"
 					break
 				}
 			}
 		}
 	}
 
-	if defaultDevice != "" {
+	if (defaultDevice != "") && (ip != "") {
 		newNetwork.Device = defaultDevice
+		node.Attributes["network.ip-address"] = ip
+		newNetwork.IP = ip
+		newNetwork.CIDR = newNetwork.IP + "/32"
 	} else {
 		return false, fmt.Errorf("Unable to find any network interface which has IP address")
 	}