Fix pushgateway labels honoring (#10728)

* add honorLabels to Pushgateway ServiceMonitor

Signed-off-by: Idan Levin <idlevin@microsoft.com>

* Pushgateway chart version bump

Signed-off-by: Idan Levin <idlevin@microsoft.com>

* update readme

Signed-off-by: Idan Levin <idlevin@microsoft.com>

stable/prometheus-pushgateway/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: "0.6.0"
 description: A Helm chart for prometheus pushgateway
 name: prometheus-pushgateway
-version: 0.2.0
+version: 0.3.0
 home: https://github.com/prometheus/pushgateway
 sources:
 - https://github.com/prometheus/pushgateway

stable/prometheus-pushgateway/README.md

@@ -66,6 +66,7 @@ The following table lists the configurable parameters of the pushgateway chart a
 | `serviceMonitor.namespace`  | Namespace which Prometheus is running in                                                                                      | `monitoring`                      |
 | `serviceMonitor.interval`   | How frequently to scrape metrics (use by default, falling back to Prometheus' default)                                        |  `nil`                            |
 | `serviceMonitor.selector`   | Default to kube-prometheus install (CoreOS recommended), but should be set according to Prometheus install                    | `{ prometheus: kube-prometheus }` |
+| `serviceMonitor.honorLabels`| if `true`, label conflicts are resolved by keeping label values from the scraped data                                         | `true`                            |
 
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
 

stable/prometheus-pushgateway/templates/servicemonitor.yaml

@@ -16,6 +16,7 @@ spec:
     {{- if .Values.serviceMonitor.interval }}
     interval: {{ .Values.serviceMonitor.interval }}
     {{- end }}
+    honorLabels: {{ .Values.serviceMonitor.honorLabels }}
   selector:
     matchLabels:
       app: {{ template "prometheus-pushgateway.name" . }}

stable/prometheus-pushgateway/values.yaml

@@ -100,3 +100,6 @@ serviceMonitor:
   ## [Kube Prometheus Selector Label](https://github.com/helm/charts/tree/master/stable/prometheus-operator#exporters)
   selector:
     prometheus: kube-prometheus
+  # Retain the job and instance labels of the metrics pushed to the Pushgateway
+  # [Scraping Pushgateway](https://github.com/prometheus/pushgateway#configure-the-pushgateway-as-a-target-to-scrape)
+  honorLabels: true