[prometheus-mysql-exporter]: introduce an ability to set additional env. variables for exporter container

charts/prometheus-mysql-exporter/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: A Helm chart for prometheus mysql exporter with cloudsqlproxy
 name: prometheus-mysql-exporter
-version: 2.9.1
+version: 2.10.0
 home: https://github.com/prometheus/mysqld_exporter
 appVersion: v0.17.2
 sources:

charts/prometheus-mysql-exporter/templates/deployment.yaml

@@ -91,6 +91,17 @@ spec:
                   key: {{ .Values.mysql.existingPasswordSecret.key }}
           {{- end }}
           {{- end }}
+          {{- with .Values.extraEnvs }}
+          {{- if kindIs "map" . }}
+          {{- range $name, $value := . }}
+          - name: {{ $name }}
+            value: {{ tpl $value $ | quote }}
+          {{- end }}
+          {{- end }}
+          {{- if kindIs "slice" . -}}
+          {{ toYaml . | nindent 10 }}
+          {{- end }}
+          {{- end }}
           ports:
             - containerPort: {{ .Values.service.internalPort }}
           livenessProbe:

charts/prometheus-mysql-exporter/values.yaml

@@ -106,6 +106,15 @@ extraVolumes: []
 #   configMap:
 #     name: example
 
+# ExtraEnvs
+extraEnvs: []
+  # - name: EXTRA_ENV
+  #   value: value
+  # - name: POD_NAMESPACE
+  #   valueFrom:
+  #     fieldRef:
+  #       fieldPath: metadata.namespace
+
 podSecurityContext: {}
   # fsGroup: 65534