add ec environment variables in helm chart (#2290)

Co-authored-by: houseme <housemecn@gmail.com>

helm/rustfs/templates/configmap.yaml

@@ -82,3 +82,9 @@ data:
   RUSTFS_SCANNER_IDLE_MODE: {{ .idle_mode | quote }}
     {{- end }}
   {{- end }}
+  {{- if .Values.mode.distributed.enabled }}
+  {{- with .Values.config.rustfs.ec }}
+  RUSTFS_ERASURE_SET_DRIVE_COUNT: {{ 16 | quote }}
+  RUSTFS_STORAGE_CLASS_STANDARD: {{ .storage_class_standard | quote }}
+  {{- end }}
+  {{- end }}

helm/rustfs/values.yaml

@@ -68,6 +68,8 @@ config:
     # Optionally enable support for virtual-hosted-style requests.
     # See more information: https://docs.rustfs.com/integration/virtual.html
     domains: "" # e.g. "example.com"
+    ec:
+      storage_class_standard: "EC:4" # Storage class for standard storage class in erasure coding mode, default is "STANDARD"
     log_rotation: # Specify log rotation settings
       # size: 100 # Default value: 100 MB
       # time: hour # Default value: hour, eg: day,hour,minute,second