feat: Plugin server supports k8s deployment and configures the default download URL of the plugin (higress-group#520)

Author: NorthernBob

helm/templates/deployment.yaml

@@ -70,6 +70,10 @@ spec:
               value: "{{ .Values.swagger.enabled }}"
             - name: SPRINGDOC_SWAGGER_UI_ENABLED
               value: "{{ .Values.swagger.enabled }}"
+            {{- if and .Values.global.enablePluginServer (not (hasKey .Values.podEnvs "HIGRESS_ADMIN_WASM_PLUGIN_CUSTOM_IMAGE_URL_PATTERN"))}}
+            - name: HIGRESS_ADMIN_WASM_PLUGIN_CUSTOM_IMAGE_URL_PATTERN
+              value: "{{ .Values.pluginServer.UrlPattern }}"
+            {{- end }}
             {{- if .Values.podEnvs }}
             {{- range $key, $val := .Values.podEnvs }}
             - name: {{ $key }}

helm/values.yaml

@@ -126,4 +126,7 @@ o11y:
   __placeholder__: true
 
 pvc:
-  __placeholder__: true
+  __placeholder__: true
+
+pluginServer:
+  UrlPattern: "http://higress-plugin-server.higress-system.svc/plugins/${name}/${version}/plugin.wasm"