enhance: Make Web UI toggleable via config (#42814)

issue: #42813

---------

Signed-off-by: Cai Zhang <cai.zhang@zilliz.com>

configs/milvus.yaml

@@ -354,6 +354,7 @@ proxy:
     hstsMaxAge: 31536000 # Strict-Transport-Security max-age in seconds
     hstsIncludeSubDomains: false # Include subdomains in Strict-Transport-Security
     enableHSTS: false # Whether to enable setting the Strict-Transport-Security header
+    enableWebUI: true # Whether to enable setting the WebUI middleware on the metrics port
   ip:  # TCP/IP address of proxy. If not specified, use the first unicastable address
   port: 19530 # TCP port of proxy
   internalPort: 19529

internal/http/server.go

@@ -103,8 +103,10 @@ func registerDefaults() {
 		Handler: GetStaticHandler(),
 	})
 
+	if paramtable.Get().HTTPCfg.EnableWebUI.GetAsBool() {
 		RegisterWebUIHandler()
 	}
+}
 
 func RegisterStopComponent(triggerComponentStop func(role string) error) {
 	// register restful api to trigger stop

pkg/util/paramtable/http_param.go

@@ -26,6 +26,7 @@ type httpConfig struct {
 	HSTSMaxAge            ParamItem `refreshable:"false"`
 	HSTSIncludeSubDomains ParamItem `refreshable:"false"`
 	EnableHSTS            ParamItem `refreshable:"false"`
+	EnableWebUI           ParamItem `refreshable:"false"`
 }
 
 func (p *httpConfig) init(base *BaseTable) {
@@ -110,4 +111,13 @@ func (p *httpConfig) init(base *BaseTable) {
 		Export:       true,
 	}
 	p.EnableHSTS.Init(base.mgr)
+
+	p.EnableWebUI = ParamItem{
+		Key:          "proxy.http.enableWebUI",
+		DefaultValue: "true",
+		Version:      "v2.5.14",
+		Doc:          "Whether to enable setting the WebUI middleware on the metrics port",
+		Export:       true,
+	}
+	p.EnableWebUI.Init(base.mgr)
 }

pkg/util/paramtable/http_param_test.go

@@ -31,4 +31,5 @@ func TestHTTPConfig_Init(t *testing.T) {
 	assert.Equal(t, cfg.Port.GetValue(), "")
 	assert.Equal(t, cfg.AcceptTypeAllowInt64.GetValue(), "true")
 	assert.Equal(t, cfg.EnablePprof.GetAsBool(), true)
+	assert.Equal(t, cfg.EnableWebUI.GetAsBool(), true)
 }