[telegraf] Add support for Cisco Model-Driven Telemetry (cisco_telemetry_mdt) (#548)

charts/telegraf/Chart.yaml

 apiVersion: v2
 name: telegraf
-version: 1.8.47
+version: 1.8.48
 appVersion: 1.30.3
 deprecated: false
 description: Telegraf is an agent written in Go for collecting, processing, aggregating, and writing metrics.

charts/telegraf/templates/service.yaml

@@ -84,6 +84,12 @@ spec:
     name: {{ printf "%s-%s" "socket-listener" (regexFind "[0-9]+$" $value.service_address) }}
     {{- end }}
     {{- end }}
+    {{- if eq $key "cisco_telemetry_mdt" }}
+  - port: {{ trimPrefix ":" $value.service_address | int64 }}
+    targetPort: {{ trimPrefix ":" $value.service_address | int64 }}
+    protocol: "TCP"
+    name: "cisco-telemetry-mdt"
+    {{- end }}
   {{- end -}}
   {{- end }}
   {{- range $objectKey, $objectValue := .Values.config.outputs }}