[helm] Allow setting notification.toml config (#6159)

* [helm] Allow setting notification.toml config

* [helm] Set notification config conditionally

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

@@ -234,6 +234,12 @@ spec:
             - name: data-filer
               mountPath: /data
             {{- end }}
+            {{- if .Values.filer.notificationConfig }}
+            - name: notification-config
+              readOnly: true
+              mountPath: /etc/seaweedfs/notification.toml
+              subPath: notification.toml
+            {{- end }}
             {{- if .Values.global.enableSecurity }}
             - name: security-config
               readOnly: true
@@ -349,6 +355,11 @@ spec:
             secretName: seaweedfs-s3-secret
             {{- end }}
         {{- end }}
+        {{- if .Values.filer.notificationConfig }}
+        - name: notification-config
+          configMap:
+            name: {{ template "seaweedfs.name" . }}-notification-config
+        {{- end }}
         {{- if .Values.global.enableSecurity }}
         - name: security-config
           configMap:

k8s/charts/seaweedfs/templates/notification-configmap.yaml

@@ -0,0 +1,19 @@
+{{- if and .Values.filer.enabled .Values.filer.notificationConfig }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "seaweedfs.name" . }}-notification-config
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app.kubernetes.io/name: {{ template "seaweedfs.name" . }}
+    helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+{{- if .Values.filer.annotations }}
+  annotations:
+    {{- toYaml .Values.filer.annotations | nindent 4 }}
+{{- end }}
+data:
+  notification.toml: |-
+    {{ .Values.filer.notificationConfig | nindent 4 }}
+{{- end }}

k8s/charts/seaweedfs/values.yaml

@@ -546,6 +546,19 @@ filer:
   # Disable http request, only gRpc operations are allowed
   disableHttp: false
 
+  # Add a custom notification.toml to configure filer notifications
+  # Example:
+  # notificationConfig: |-
+  #   [notification.kafka]
+  #   enabled = false
+  #   hosts = [
+  #       "localhost:9092"
+  #   ]
+  #   topic = "seaweedfs_filer"
+  #   offsetFile = "./last.offset"
+  #   offsetSaveIntervalSeconds = 10
+  notificationConfig: ""
+
   # DEPRECATE: enablePVC, storage, storageClass
   # Consider replacing with filer.data section below instead.