Add lifecycle hooks to Telegraf

charts/telegraf/templates/deployment.yaml

@@ -39,6 +39,25 @@ spec:
         - name: {{ .name }}
           mountPath: {{ .mountPath }}
         {{- end }}
+        {{- if .Values.hooks }}
+        lifecycle:
+        {{- if .Values.hooks.postStart }}
+          postStart:
+            exec:
+              command:
+        {{- range .Values.hooks.postStart }}
+                - {{ . | quote }}
+        {{- end }}
+        {{ end }}
+        {{- if .Values.hooks.preStop }}
+          preStop:
+            exec:
+              command:
+        {{- range .Values.hooks.preStop }}
+                - {{ . | quote }}
+        {{- end }}
+        {{ end }}
+        {{ end }}
         {{- range $objectKey, $objectValue := .Values.config.outputs }}
         {{- range $key, $value := . -}}
         {{- $tp := typeOf $value -}}

charts/telegraf/values.yaml

@@ -124,3 +124,8 @@ config:
         metric_separator: "_"
         allowed_pending_messages: 10000
         percentile_limit: 1000
+
+# Lifecycle hooks
+# hooks:
+#   postStart: ["/bin/sh", "-c", "echo Telegraf started"]
+#   preStop: ["/bin/sh", "-c", "sleep 60"]
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