Allow for customization of env vars on prometheus-pushgateway (#12196)

Signed-off-by: Jessie A. Morris <jessie.m@midigator.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: 0.3.0
+version: 0.3.1
 home: https://github.com/prometheus/pushgateway
 sources:
 - https://github.com/prometheus/pushgateway

stable/prometheus-pushgateway/README.md

@@ -42,6 +42,7 @@ The following table lists the configurable parameters of the pushgateway chart a
 | --------------------------- | ----------------------------------------------------------------------------------------------------------------------------- | --------------------------------- |
 | `affinity`                  | Affinity settings for pod assignment                                                                                          | `{}`                              |
 | `extraArgs`                 | Optional flags for pushgateway                                                                                                | `[]`                              |
+| `extraVars`                 | Optional environment variables for pushgateway                                                                                | `[]`                              |
 | `image.repository`          | Image repository                                                                                                              | `prom/pushgateway`                |
 | `image.tag`                 | Image tag                                                                                                                     | `v0.6.0`                          |
 | `image.pullPolicy`          | Image pull policy                                                                                                             | `IfNotPresent`                    |

stable/prometheus-pushgateway/templates/deployment.yaml

@@ -16,13 +16,17 @@ spec:
         app: {{ template "prometheus-pushgateway.name" . }}
         release: {{ .Release.Name }}
       annotations:
-{{ toYaml .Values.podAnnotations | indent 8 }}        
+{{ toYaml .Values.podAnnotations | indent 8 }}
     spec:
       serviceAccountName: {{ template "prometheus-pushgateway.serviceAccountName" . }}
       containers:
         - name: pushgateway
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
+        {{- if .Values.extraVars }}
+          env:
+{{ toYaml .Values.extraVars | indent 12 }}
+        {{- end }}
         {{- if .Values.extraArgs }}
           args:
 {{ toYaml .Values.extraArgs | indent 12 }}

stable/prometheus-pushgateway/values.yaml

@@ -26,6 +26,9 @@ serviceAccountLabels: {}
 # Optional additional arguments
 extraArgs: []
 
+# Optional additional environment variables
+extraVars: []
+
 resources: {}
   # We usually recommend not to specify default resources and to leave this as a conscious
   # choice for the user. This also increases chances charts run on environments with little