helm: allow setting master.toml config (#4797)

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

@@ -0,0 +1,15 @@
+{{- if .Values.master.enabled }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "seaweedfs.name" . }}-master-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 }}
+data:
+  master.toml: |-
+    {{ .Values.master.config | nindent 4 }}
+{{- end }}

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

@@ -142,6 +142,10 @@ spec:
             - name: seaweedfs-master-log-volume
               mountPath: "/logs/"
             {{- end }}
+            - name: master-config
+              readOnly: true
+              mountPath: /etc/seaweedfs/master.toml
+              subPath: master.toml
             {{- if .Values.global.enableSecurity }}
             - name: security-config
               readOnly: true
@@ -212,6 +216,9 @@ spec:
             path: {{ .Values.master.data.hostPathPrefix }}/seaweed-master/
             type: DirectoryOrCreate
         {{- end }}
+        - name: master-config
+          configMap:
+            name: {{ template "seaweedfs.name" . }}-master-config
         {{- if .Values.global.enableSecurity }}
         - name: security-config
           configMap:

k8s/charts/seaweedfs/values.yaml

@@ -62,6 +62,10 @@ master:
   # Disable http request, only gRpc operations are allowed
   disableHttp: false
 
+  config: |-
+    # Enter any extra configuration for master.toml here.
+    # It may be be a multi-line string.
+
   # can use ANY storage-class , example with local-path-provisioner
   #  data:
   #    type: "persistentVolumeClaim"