[NET-6899] Create name-aligned Service when reconciling MeshGateway resource (#19900)

* NET-6899 Create name-aligned Service when reconciling MeshGateway resource

The Service has an owner reference added to it indicating that it belongs to a MeshGateway

* Specify port list when creating Service

* Use constants, add TODO w/ ticket reference

* Include gateway-kind in metadata of Service resource

internal/mesh/internal/controllers/meshgateways/controller.go

@@ -5,14 +5,22 @@ package meshgateways
 
 import (
 	"context"
-	"errors"
+
+	"google.golang.org/protobuf/types/known/anypb"
 
 	"github.com/hashicorp/consul/internal/controller"
+	"github.com/hashicorp/consul/internal/resource"
+	pbcatalog "github.com/hashicorp/consul/proto-public/pbcatalog/v2beta1"
 	pbmesh "github.com/hashicorp/consul/proto-public/pbmesh/v2beta1"
+	"github.com/hashicorp/consul/proto-public/pbresource"
 )
 
 const (
 	ControllerName = "consul.io/mesh-gateway"
+
+	meshPortName = "mesh"
+	wanPort      = 8443
+	wanPortName  = "wan"
 )
 
 func Controller() *controller.Controller {
@@ -24,7 +32,48 @@ func Controller() *controller.Controller {
 
 type reconciler struct{}
 
+// Reconcile is responsible for creating a Service w/ a MeshGateway owner,
+// in addition to other things discussed in the RFC.
 func (r *reconciler) Reconcile(ctx context.Context, rt controller.Runtime, req controller.Request) error {
+	rt.Logger = rt.Logger.With("resource-id", req.ID)
+	rt.Logger.Trace("reconciling mesh gateway")
+
+	// TODO NET-6822 The ports and workload selector below are currently hardcoded
+	//  until they are added to the MeshGateway resource and pulled from there.
+	service := &pbcatalog.Service{
+		Workloads: &pbcatalog.WorkloadSelector{
+			Prefixes: []string{req.ID.Name},
+		},
+		Ports: []*pbcatalog.ServicePort{
+			{
+				Protocol:    pbcatalog.Protocol_PROTOCOL_TCP,
+				TargetPort:  wanPortName,
+				VirtualPort: wanPort,
+			},
+			{
+				Protocol:   pbcatalog.Protocol_PROTOCOL_MESH,
+				TargetPort: meshPortName,
+			},
+		},
+	}
+
+	serviceData, err := anypb.New(service)
+	if err != nil {
+		return err
+	}
+
+	_, err = rt.Client.Write(ctx, &pbresource.WriteRequest{
+		Resource: &pbresource.Resource{
+			Data:     serviceData,
+			Id:       resource.ReplaceType(pbcatalog.ServiceType, req.ID),
+			Metadata: map[string]string{"gateway-kind": "mesh-gateway"},
+			Owner:    req.ID,
+		},
+	})
+	if err != nil {
+		return err
+	}
+
 	// TODO NET-6426, NET-6427, NET-6428, NET-6429, NET-6430, NET-6431, NET-6432
-	return errors.New("not implemented")
+	return nil
 }