feat(eck-exporter): add self monitoring of kube-state-metrics

Author: npdgm

charts/eck-exporter/templates/deployment.yaml

@@ -73,6 +73,9 @@ spec:
         args:
         - --port={{ int .Values.podListenPort }}
         - --telemetry-port={{ int .Values.podTelemetryListenPort }}
+        {{- if .Values.serviceMonitor.selfMonitor }}
+        - --telemetry-host=0.0.0.0
+        {{- end }}
         - --custom-resource-state-only
         - --custom-resource-state-config-file=/etc/eckresourcestate/config.yaml
         {{- if .Values.autoGoMemLimit.enabled }}

charts/eck-exporter/templates/servicemonitor.yaml

@@ -36,6 +36,29 @@ spec:
     {{- if .Values.serviceMonitor.extraParameters }}
     {{- toYaml .Values.serviceMonitor.extraParameters | nindent 4 }}
     {{- end }}
+  {{- if .Values.serviceMonitor.selfMonitor }}
+  - port: telemetry
+    {{- if .Values.serviceMonitor.interval }}
+    interval: {{ .Values.serviceMonitor.interval }}
+    {{- end }}
+    {{- if .Values.serviceMonitor.scrapeTimeout }}
+    scrapeTimeout: {{ .Values.serviceMonitor.scrapeTimeout }}
+    {{- end }}
+    {{- if .Values.serviceMonitor.honorLabels }}
+    honorLabels: {{ .Values.serviceMonitor.honorLabels }}
+    {{- end }}
+    {{- if .Values.serviceMonitor.relabelings }}
+    relabelings:
+    {{- .Values.serviceMonitor.relabelings | toYaml | nindent 4 }}
+    {{- end }}
+    {{- if .Values.serviceMonitor.metricRelabelings }}
+    metricRelabelings:
+    {{- .Values.serviceMonitor.metricRelabelings | toYaml | nindent 4 }}
+    {{- end }}
+    {{- if .Values.serviceMonitor.extraParameters }}
+    {{- toYaml .Values.serviceMonitor.extraParameters | nindent 4 }}
+    {{- end }}
+  {{- end }}
   namespaceSelector:
     matchNames:
     - {{ .Release.Namespace }}

charts/eck-exporter/values.yaml

@@ -167,6 +167,8 @@ prometheusRules:
 serviceMonitor:
   # -- Should a ServiceMonitor object be installed to scrape this exporter. For prometheus-operator (kube-prometheus-stack) users.
   create: true
+  # -- Also scrape internal metrics of kube-state-metrics on it's telemetry endpoint
+  selfMonitor: false
   # -- Optional namespace in which to create the ServiceMonitor. Could be where prometheus-operator is running.
   namespace: ""
   # -- Optional name of the label on the target Service to use as the job name in Prometheus
@@ -292,7 +294,7 @@ securityContext:
   readOnlyRootFilesystem: true
   capabilities:
     drop:
-    - ALL
+      - ALL
 
 # -- PriorityClassName for the kube-state-metrics Pod
 priorityClassName: ""