Now I added the source for the go plugin as well as Unbound

plugins/telegraf_netifinfo_plugin.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+func main() {
+
+	//----------------------
+	// Get the local machine IP address
+	// https://www.socketloop.com/tutorials/golang-how-do-I-get-the-local-ip-non-loopback-address
+	//----------------------
+
+	var currentIP, currentNetworkHardwareName string
+
+	// get all the system's or local machine's network interfaces
+
+	interfaces, _ := net.Interfaces()
+	for _, interf := range interfaces {
+
+		if addrs, err := interf.Addrs(); err == nil {
+			for _, addr := range addrs {
+				// check the address type and if it is not a loopback the display it
+				// = GET LOCAL IP ADDRESS
+				if ipnet, ok := addr.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+					if ipnet.IP.To4() != nil {
+						currentIP = ipnet.IP.String()
+
+						// only interested in the name with current IP address`
+						if strings.Contains(addr.String(), currentIP) {
+							currentNetworkHardwareName = interf.Name
+						}
+
+						macAddress := interf.HardwareAddr
+						hwAddr, err := net.ParseMAC(macAddress.String())
+						if err != nil {
+							continue
+						}
+
+						currentNetworkHardwareName = strings.Replace(currentNetworkHardwareName, " ", "", -1)
+
+						fmt.Printf("interface,name=%s,ip_address=%s,mac_address=%s status=1\n",
+							currentNetworkHardwareName, currentIP, hwAddr)
+					}
+				}
+			}
+		}
+	}
+}

plugins/unbound_telegraf.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+/usr/local/sbin/unbound-control -c /var/unbound/unbound.conf $* | grep -vE 'thread[0-9]+'