feat: relabelings support for ServiceMonitor

Signed-off-by: pasteley <ceasebeing@gmail.com>

Author: pasteley

charts/coredns/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: coredns
-version: 1.45.2
+version: 1.45.3
 appVersion: 1.13.1
 home: https://coredns.io
 icon: https://coredns.io/images/CoreDNS_Colour_Horizontal.png
@@ -20,4 +20,4 @@ type: application
 annotations:
   artifacthub.io/changes: |
     - kind: added
-      description: Add configurable dnsPolicy for deployment
+      description: Support for relabling in ServiceMonitor

charts/coredns/README.md

@@ -127,6 +127,7 @@ The command removes all the Kubernetes components associated with the chart and
 | `prometheus.monitor.namespace`                 | Selector to select which namespaces the Endpoints objects are discovered from.                                                            | `""`                                                         |
 | `prometheus.monitor.interval`                  | Scrape interval for polling the metrics endpoint. (E.g. "30s")                                                                            | `""`                                                         |
 | `prometheus.monitor.selector`                  | Service selector                                                                                                                          | `{}`                                                         |
+| `prometheus.monitor.relabelings`               | Relabelings to apply to samples before ingestion                                                                                          | `[]`                                                         |
 | `service.clusterIP`                            | IP address to assign to service                                                                                                           | `""`                                                         |
 | `service.clusterIPs`                           | IP addresses to assign to service                                                                                                         | `[]`                                                         |
 | `service.loadBalancerIP`                       | IP address to assign to load balancer (if supported)                                                                                      | `""`                                                         |

charts/coredns/templates/servicemonitor.yaml

@@ -37,4 +37,8 @@ spec:
       {{- if .Values.prometheus.monitor.interval }}
       interval: {{ .Values.prometheus.monitor.interval }}
       {{- end }}
+      {{- with .Values.prometheus.monitor.relabelings }}
+      relabelings:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
 {{- end }}

charts/coredns/values.yaml

@@ -51,6 +51,9 @@ prometheus:
     namespace: ""
     interval: ""
     selector: {}
+    # relabelings to apply to samples before ingestion
+    # ref: https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config
+    relabelings: []
 
 service:
 # clusterIP: ""