[Feature] [Networking] Pass through Server Header (#1775)

CHANGELOG.md

@@ -28,6 +28,7 @@
 - (Feature) (Networking) ArangoRoute Protocol
 - (Feature) (Platform) Platform Requirements support
 - (Improvement) Drop slash requirement from ArangoRoute
+- (Feature) (Networking) Pass through Server Header
 
 ## [1.2.43](https://github.com/arangodb/kube-arangodb/tree/1.2.43) (2024-10-14)
 - (Feature) ArangoRoute CRD

pkg/deployment/resources/gateway/gateway_config.go

@@ -297,8 +297,9 @@ func (c Config) RenderFilters() ([]*listenerAPI.Filter, error) {
 	}
 
 	filterConfigType, err := anypb.New(&httpConnectionManagerAPI.HttpConnectionManager{
-		StatPrefix: "ingress_http",
-		CodecType:  httpConnectionManagerAPI.HttpConnectionManager_AUTO,
+		StatPrefix:                 "ingress_http",
+		CodecType:                  httpConnectionManagerAPI.HttpConnectionManager_AUTO,
+		ServerHeaderTransformation: httpConnectionManagerAPI.HttpConnectionManager_PASS_THROUGH,
 		RouteSpecifier: &httpConnectionManagerAPI.HttpConnectionManager_RouteConfig{
 			RouteConfig: &routeAPI.RouteConfiguration{
 				Name: "default",

pkg/deployment/resources/gateway/gateway_config_tls.go

@@ -54,6 +54,7 @@ func (c *ConfigTLS) RenderListenerTransportSocket() (*coreAPI.TransportSocket, e
 					},
 				},
 			},
+			AlpnProtocols: []string{"h2,http/1.1"},
 		},
 	})
 	if err != nil {

pkg/deployment/resources/pod_creator_gateway_container.go

@@ -131,15 +131,6 @@ func (a *ArangoGatewayContainer) GetEnvs() ([]core.EnvVar, []core.EnvFromSource)
 
 	envs.Add(true, k8sutil.GetLifecycleEnv()...)
 
-	if cm, ok := a.cachedStatus.ConfigMap().V1().GetSimple(GetGatewayConfigMapName(a.input.ArangoMember.GetName())); ok {
-		if v, ok := cm.Data[ConfigMapChecksumKey]; ok {
-			envs.Add(true, core.EnvVar{
-				Name:  MemberConfigChecksumENV,
-				Value: v,
-			})
-		}
-	}
-
 	if !a.spec.Gateway.IsDynamic() {
 		if cm, ok := a.cachedStatus.ConfigMap().V1().GetSimple(GetGatewayConfigMapName(a.input.ApiObject.GetName())); ok {
 			if v, ok := cm.Data[ConfigMapChecksumKey]; ok {