Select default apache port depending on url scheme

Author: neezgee

CHANGELOG.md

@@ -18,6 +18,7 @@ re-added in a "verbose" mode if there is demand for it.
 - [#203](https://github.com/influxdb/telegraf/pull/200): AMQP output. Thanks @ekini!
 - [#182](https://github.com/influxdb/telegraf/pull/182): OpenTSDB output. Thanks @rplessl!
 - [#187](https://github.com/influxdb/telegraf/pull/187): Retry output sink connections on startup.
+- [#220](https://github.com/influxdb/telegraf/pull/220): Add port tag to apache plugin. Thanks @neezgee!
 
 ### Bugfixes
 - [#170](https://github.com/influxdb/telegraf/issues/170): Systemd support

plugins/apache/apache.go

@@ -134,11 +134,18 @@ func (n *Apache) gatherScores(data string, acc plugins.Accumulator, tags map[str
 // Get tag(s) for the apache plugin
 func getTags(addr *url.URL) map[string]string {
 	h := addr.Host
-	if host, port, err := net.SplitHostPort(h); err == nil {
-		return map[string]string{"server": host, "port": port}
-	} else {
-		return map[string]string{"server": h, "port": "80"}
+	host, port, err := net.SplitHostPort(h)
+        if err != nil {
+            host = addr.Host
+            if addr.Scheme == "http" {
+                port = "80"
+            } else if addr.Scheme == "https" {
+                port = "443"
+            } else {
+                port = ""
+            }
 	}
+	return map[string]string{"server": host, "port": port}
 }
 
 func init() {