:sparkles: enhance ServiceMonitor configuration (#1973)

* Fix #1971

Signed-off-by: mikhailadvani <mikhail.advani@gmail.com>

* PR feedback

Signed-off-by: mikhailadvani <mikhail.advani@gmail.com>

* fix: generate helm docs

---------

Signed-off-by: mikhailadvani <mikhail.advani@gmail.com>
Co-authored-by: Moritz Johner <beller.moritz@googlemail.com>
Co-authored-by: Moritz Johner <moolen@users.noreply.github.com>

deploy/charts/external-secrets/README.md

@@ -120,7 +120,10 @@ The command removes all the Kubernetes components associated with the chart and
 | serviceAccount.name | string | `""` | The name of the service account to use. If not set and create is true, a name is generated using the fullname template. |
 | serviceMonitor.additionalLabels | object | `{}` | Additional labels |
 | serviceMonitor.enabled | bool | `false` | Specifies whether to create a ServiceMonitor resource for collecting Prometheus metrics |
+| serviceMonitor.honorLabels | bool | `false` | Let prometheus add an exported_ prefix to conflicting labels |
 | serviceMonitor.interval | string | `"30s"` | Interval to scrape metrics |
+| serviceMonitor.metricRelabelings | list | `[]` | Metric relabel configs to apply to samples before ingestion. [Metric Relabeling](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#metric_relabel_configs) |
+| serviceMonitor.relabelings | list | `[]` | Relabel configs to apply to samples before ingestion. [Relabeling](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config) |
 | serviceMonitor.scrapeTimeout | string | `"25s"` | Timeout if metrics can't be retrieved in given time interval |
 | tolerations | list | `[]` |  |
 | webhook.affinity | object | `{}` |  |

deploy/charts/external-secrets/templates/servicemonitor.yaml

@@ -36,4 +36,13 @@ spec:
   - port: metrics
     interval: {{ .Values.serviceMonitor.interval }}
     scrapeTimeout: {{ .Values.serviceMonitor.scrapeTimeout }}
+    honorLabels: {{ .Values.serviceMonitor.honorLabels }}
+    {{- with .Values.serviceMonitor.metricRelabelings }}
+    metricRelabelings:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
+    {{- with .Values.serviceMonitor.relabelings }}
+    relabelings:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
 {{- end }}

deploy/charts/external-secrets/values.yaml

@@ -126,6 +126,27 @@ serviceMonitor:
   # -- Timeout if metrics can't be retrieved in given time interval
   scrapeTimeout: 25s
 
+  # -- Let prometheus add an exported_ prefix to conflicting labels
+  honorLabels: false
+
+  # -- Metric relabel configs to apply to samples before ingestion. [Metric Relabeling](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#metric_relabel_configs)
+  metricRelabelings: []
+  # - action: replace
+  #   regex: (.*)
+  #   replacement: $1
+  #   sourceLabels:
+  #   - exported_namespace
+  #   targetLabel: namespace
+
+  # -- Relabel configs to apply to samples before ingestion. [Relabeling](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config)
+  relabelings: []
+  # - sourceLabels: [__meta_kubernetes_pod_node_name]
+  #   separator: ;
+  #   regex: ^(.*)$
+  #   targetLabel: nodename
+  #   replacement: $1
+  #   action: replace
+
 metrics:
   service:
     # -- Enable if you use another monitoring tool than Prometheus to scrape the metrics