upgrade to istio 1.19 (#1211)

Co-authored-by: CH3CHO <ch3cho@qq.com>
Co-authored-by: rinfx <893383980@qq.com>

pkg/config/constants/constants.go

@@ -16,6 +16,10 @@ package constants
 
 const DefaultIngressClass = "higress"
 
+const DefaultGatewayClass = "higress"
+
 const KnativeIngressCRDName = "ingresses.networking.internal.knative.dev"
 
 const KnativeServicesCRDName = "services.serving.knative.dev"
+
+const ManagedGatewayController = "higress.io/gateway-controller"

pkg/config/envs.go

@@ -0,0 +1,25 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import "istio.io/pkg/env"
+
+var (
+	PodNamespace = env.RegisterStringVar("POD_NAMESPACE", "higress-system", "").Get()
+	PodName      = env.RegisterStringVar("POD_NAME", "", "").Get()
+	// Revision is the value of the Istio control plane revision, e.g. "canary",
+	// and is the value used by the "istio.io/rev" label.
+	Revision = env.Register("REVISION", "", "").Get()
+)