added secret envs to filer (#4284)

k8s/charts/seaweedfs/templates/filer-statefulset.yaml

@@ -97,6 +97,12 @@ spec:
               value: {{ $value | quote }}
             {{- end }}
             {{- end }}
+            {{- if .Values.filer.secretExtraEnvironmentVars }}
+            {{- range $key, $value := .Values.filer.secretExtraEnvironmentVars }}
+            - name: {{ $key }}
+              valueFrom: {{ toYaml $value | nindent 16 }}
+            {{- end }}
+            {{- end }}             
           command:
             - "/bin/sh"
             - "-ec"

k8s/charts/seaweedfs/values.yaml

@@ -407,6 +407,18 @@ filer:
     # directories under this folder will be automatically creating a separate bucket
     WEED_FILER_BUCKETS_FOLDER: "/buckets"
 
+
+  # secret env variables
+  secretExtraEnvironmentVars: []
+      # WEED_POSTGRES_USERNAME:
+      #   secretKeyRef:
+      #     name: postgres-credentials
+      #     key: username
+      # WEED_POSTGRES_PASSWORD:
+      #   secretKeyRef:
+      #     name: postgres-credentials
+      #     key: password
+
   s3:
     enabled: true
     port: 8333