api: support infra deployment in the gateway namespace

Signed-off-by: Karol Szwaj <[email protected]>

Author: cnvergence

api/v1alpha1/envoygateway_types.go

@@ -254,10 +254,24 @@ type KubernetesWatchMode struct {
 	NamespaceSelector *metav1.LabelSelector `json:"namespaceSelector,omitempty"`
 }
 
+const (
+	// KubernetesWatchModeTypeGControllerNamespace indicates that the controller namespace is used for the infra proxy deployments.
+	KubernetesDeployModeTypeControllerNamespace = "ControllerNamespace"
+
+	// KubernetesWatchModeTypeGatewayNamespace indicates that the gateway namespace is used for the infra proxy deployments.
+	KubernetesDeployModeTypeGatewayNamespace = "GatewayNamespace"
+)
+
+// KubernetesWatchModeType defines the type of KubernetesWatchMode
+type KubernetesDeployModeType string
+
 // KubernetesDeployMode holds configuration for how to deploy managed resources such as the Envoy Proxy
 // data plane fleet.
 type KubernetesDeployMode struct {
-	// TODO
+	// Type indicates what deploy mode to use. KubernetesDeployModeTypeControllerNamespace and
+	// KubernetesDeployModeTypeGatewayNamespace are currently supported.
+	// By default, when this field is unset or empty, Envoy Gateway will deploy Envoy Proxy fleet in the Controller namespace.
+	Type KubernetesDeployModeType `json:"type,omitempty"`
 }
 
 // EnvoyGatewayCustomProvider defines configuration for the Custom provider.