feat: add support for existing gateways in helm chart (#1469)

Co-authored-by: loverustfs <hello@rustfs.com>

helm/README.md

@@ -114,6 +114,8 @@ RustFS helm chart supports **standalone and distributed mode**. For standalone m
 | gatewayApi.gatewayClass | string | `traefik` | Gateway class implementation. |
 | gatewayApi.hostname | string | Hostname to access RustFS via gateway api. |
 | gatewayApi.secretName | string | Secret tls to via RustFS using HTTPS. |
+| gatewayApi.existingGateway.name | string | `""` |  The existing gateway name, instead of creating a new one. |
+| gatewayApi.existingGateway.namespace | string | `""` |  The namespace of the existing gateway, if not the local namespace. |
 
 ---
 

helm/rustfs/templates/gateway-api/gateway.yml

@@ -1,4 +1,4 @@
-{{- if .Values.gatewayApi.enabled }}
+{{- if and .Values.gatewayApi.enabled (empty .Values.gatewayApi.existingGateway.name) }}
 apiVersion: gateway.networking.k8s.io/v1
 kind: Gateway
 metadata:

helm/rustfs/templates/gateway-api/httproute.yml

@@ -5,7 +5,14 @@ metadata:
   name: {{ include "rustfs.fullname" . }}-route
 spec:
   parentRefs:
+  {{- if .Values.gatewayApi.existingGateway.name }}
+    - name: {{ .Values.gatewayApi.existingGateway.name }}
+      {{- if .Values.gatewayApi.existingGateway.namespace }}
+      namespace: {{ .Values.gatewayApi.existingGateway.namespace }}
+      {{- end }}
+  {{- else }}
     - name: {{ include "rustfs.fullname" . }}-gateway
+  {{- end }}
   hostnames:
     - {{ .Values.gatewayApi.hostname }}
   rules:

helm/rustfs/templates/secret-tls.yaml

@@ -1,4 +1,4 @@
-{{- if and (or .Values.gatewayApi.enabled .Values.ingress.tls.enabled) (not .Values.ingress.tls.certManager.enabled) }}
+{{- if and (or .Values.gatewayApi.enabled .Values.ingress.tls.enabled) (not (or .Values.ingress.tls.certManager.enabled .Values.gatewayApi.existingGateway.name)) }}
 apiVersion: v1
 kind: Secret
 metadata:

helm/rustfs/values.yaml

@@ -140,6 +140,9 @@ gatewayApi:
   gatewayClass: traefik
   hostname: example.rustfs.com
   secretName: secret-tls
+  existingGateway:
+    name: ""
+    namespace: ""
 
 resources:
   # We usually recommend not to specify default resources and to leave this as a conscious