Add scrap target for kubernetes cAdvisor (#2700)

stable/prometheus/Chart.yaml

@@ -1,5 +1,5 @@
 name: prometheus
-version: 4.6.15
+version: 4.6.16
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/
 icon: https://raw.githubusercontent.com/prometheus/prometheus.github.io/master/assets/prometheus_logo-cb55bb5c346.png

stable/prometheus/values.yaml

@@ -692,6 +692,43 @@ serverFiles:
             target_label: __metrics_path__
             replacement: /api/v1/nodes/${1}/proxy/metrics
 
+
+      - job_name: 'kubernetes-nodes-cadvisor'
+
+        # Default to scraping over https. If required, just disable this or change to
+        # `http`.
+        scheme: https
+
+        # This TLS & bearer token file config is used to connect to the actual scrape
+        # endpoints for cluster components. This is separate to discovery auth
+        # configuration because discovery & scraping are two separate concerns in
+        # Prometheus. The discovery auth config is automatic if Prometheus runs inside
+        # the cluster. Otherwise, more config options have to be provided within the
+        # <kubernetes_sd_config>.
+        tls_config:
+          ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+          # If your node certificates are self-signed or use a different CA to the
+          # master CA, then disable certificate verification below. Note that
+          # certificate verification is an integral part of a secure infrastructure
+          # so this should only be disabled in a controlled environment. You can
+          # disable certificate verification by uncommenting the line below.
+          #
+          insecure_skip_verify: true
+        bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
+
+        kubernetes_sd_configs:
+          - role: node
+
+        relabel_configs:
+          - action: labelmap
+            regex: __meta_kubernetes_node_label_(.+)
+          - target_label: __address__
+            replacement: kubernetes.default.svc:443
+          - source_labels: [__meta_kubernetes_node_name]
+            regex: (.+)
+            target_label: __metrics_path__
+            replacement: /api/v1/nodes/${1}:4194/proxy/metrics
+
       # Scrape config for service endpoints.
       #
       # The relabeling allows the actual service scrape endpoint to be configured