add helm chart support for gateway

helm/minio/values.yaml

@@ -14,7 +14,7 @@ clusterDomain: cluster.local
 ##
 image:
   repository: minio/minio
-  tag: RELEASE.2021-08-20T18-32-01Z
+  tag: RELEASE.2021-08-31T05-46-54Z
   pullPolicy: IfNotPresent
 
 imagePullSecrets: []
@@ -28,11 +28,13 @@ mcImage:
   tag: RELEASE.2021-07-27T06-46-19Z
   pullPolicy: IfNotPresent
 
-## minio server mode, i.e. standalone or distributed.
+## minio mode, i.e. standalone or distributed or gateway (nas)
 ## Distributed MinIO ref: https://docs.minio.io/docs/distributed-minio-quickstart-guide
-##
+## NAS Gateway MinIO ref: https://docs.min.io/docs/minio-gateway-for-nas.html
 mode: distributed
 
+## NOTE: currently only "nas" gateway is supported.
+
 ## Additional labels to include with deployment or statefulset
 additionalLabels: []
 
@@ -101,6 +103,11 @@ replicas: 16
 # Number of expanded MinIO clusters
 pools: 1
 
+# Deploy if 'mode == gateway' - 4 replicas.
+gateway:
+  type: "nas" # currently only "nas" is supported.
+  replicas: 4
+
 ## TLS Settings for MinIO
 tls:
   enabled: false
@@ -249,6 +256,7 @@ users:
     secretKey: console123
     policy: consoleAdmin
 
+
 ## Additional Annotations for the Kubernetes Job makeUserJob
 makeUserJob:
   podAnnotations: