[prometheus-postgres-exporter] Implement ability to define an existing secret (#5011)

* [prometheus-postgres-exporter] Implement ability to define an existing secret for the configuration file

Signed-off-by: festeveira <[email protected]>

* Remove trailing whitespaces

Signed-off-by: festeveira <[email protected]>

* Update Chart.yaml

Signed-off-by: zeritti <[email protected]>

---------

Signed-off-by: festeveira <[email protected]>
Signed-off-by: MH <[email protected]>
Signed-off-by: zeritti <[email protected]>
Co-authored-by: MH <[email protected]>
Co-authored-by: zeritti <[email protected]>

Author: 3 people

charts/prometheus-postgres-exporter/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: "v0.16.0"
 description: A Helm chart for prometheus postgres-exporter
 name: prometheus-postgres-exporter
-version: 6.5.0
+version: 6.6.0
 home: https://github.com/prometheus-community/postgres_exporter
 sources:
 - https://github.com/prometheus-community/postgres_exporter

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

@@ -159,7 +159,7 @@ spec:
             {{- toYaml . | nindent 12 }}
           {{- end }}
           volumeMounts:
-            {{- if .Values.config.postgresExporter }}
+            {{- if or .Values.config.postgresExporter .Values.config.existingSecret.enabled }}
             - name: postgres-exporter
               mountPath: /etc/postgres_exporter.yml
               subPath: postgres_exporter.yml
@@ -195,7 +195,13 @@ spec:
           defaultMode: 420
           name: {{ template "prometheus-postgres-exporter.fullname" . }}
         name: postgres-exporter
-      {{- end }}
+      {{- else if .Values.config.existingSecret.enabled }}
+      - secret:
+          defaultMode: 420
+          secretName: {{ .Values.config.existingSecret.name }}
+        name: postgres-exporter
+      {{ end}}
+
       {{- with .Values.extraVolumes }}
       {{ toYaml . | nindent 6 }}
       {{- end }}

charts/prometheus-postgres-exporter/values.yaml

@@ -189,6 +189,12 @@ config:
     #     options:
     #       sslmode: disable
 
+  # define an existing secret to be mounted as the config file
+  # needs to have the key 'postgres_exporter.yml'
+  existingSecret:
+    enabled: false
+    name: ""
+
 nodeSelector: {}
 
 tolerations: []