[Aether-1482] - Add the new helm chart to install the telegraf external daemon of ONOS controller

- Use the servicemonitor to work with Prometheus instead of Rancher's annotation

Change-Id: Icabfb43b1dbf5f86bfdbd4117cf550770d3418a7
diff --git a/apps/tost-telegraf/Chart.yaml b/apps/tost-telegraf/Chart.yaml
new file mode 100644
index 0000000..4569bec
--- /dev/null
+++ b/apps/tost-telegraf/Chart.yaml
@@ -0,0 +1,31 @@
+# Copyright 2021-present Open Networking Foundation
+# SPDX-License-Identifier: LicenseRef-ONF-Member-Only-1.0
+
+apiVersion: v2
+name: tost-telegraf
+description: Telegraf plugin for TOST stack
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+appVersion: 0.1.0
+
+dependencies:
+  - name: telegraf
+    version: 1.7.38
+    repository: https://influxdata.github.io/helm-charts