[Backport release-0.51] feat(transfer): add vpcendpoint dns entries to connection secrets

pkg/controller/transfer/server/custom.go

@@ -0,0 +1,72 @@
+// /*
+// Copyright 2021 The Crossplane Authors.
+// 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 server
+
+import (
+	"context"
+
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ec2"
+	svcsdk "github.com/aws/aws-sdk-go/service/transfer"
+	"github.com/crossplane/crossplane-runtime/pkg/reconciler/managed"
+	cpresource "github.com/crossplane/crossplane-runtime/pkg/resource"
+	"github.com/pkg/errors"
+
+	svcapitypes "github.com/crossplane-contrib/provider-aws/apis/transfer/v1alpha1"
+	connectaws "github.com/crossplane-contrib/provider-aws/pkg/utils/connect/aws"
+)
+
+type vpcEndpointClient interface {
+	DescribeVpcEndpoints(*ec2.DescribeVpcEndpointsInput) (*ec2.DescribeVpcEndpointsOutput, error)
+}
+
+// newVPCClient generates an ec2 client for describing the vpc endpoint
+func newVPCClient(sess *session.Session) vpcEndpointClient {
+	return ec2.New(sess)
+}
+
+type customConnector struct {
+	*connector
+	newClientFn func(config *session.Session) vpcEndpointClient
+}
+
+func (c *customConnector) Connect(ctx context.Context, mg cpresource.Managed) (managed.ExternalClient, error) {
+	cr, ok := mg.(*svcapitypes.Server)
+	if !ok {
+		return nil, errors.New(errUnexpectedObject)
+	}
+	sess, err := connectaws.GetConfigV1(ctx, c.kube, mg, cr.Spec.ForProvider.Region)
+	if err != nil {
+		return nil, errors.Wrap(err, errCreateSession)
+	}
+
+	external := newExternal(c.kube, svcsdk.New(sess), c.opts)
+	vpcClient := c.newClientFn(sess)
+	if vpcClient == nil {
+		return nil, errors.New("failed to initialize VPC client")
+	}
+	custom := &custom{
+		client:            external.client,
+		kube:              external.kube,
+		external:          external,
+		vpcEndpointClient: vpcClient,
+	}
+
+	external.postObserve = custom.postObserve
+	external.postCreate = postCreate
+	external.preObserve = preObserve
+	external.preDelete = preDelete
+	external.preCreate = preCreate
+	return external, nil
+}

pkg/controller/transfer/server/setup.go

@@ -15,8 +15,11 @@ package server
 
 import (
 	"context"
+	"fmt"
 
+	"github.com/aws/aws-sdk-go/service/ec2"
 	svcsdk "github.com/aws/aws-sdk-go/service/transfer"
+	svcsdkapitransfer "github.com/aws/aws-sdk-go/service/transfer/transferiface"
 	xpv1 "github.com/crossplane/crossplane-runtime/apis/common/v1"
 	"github.com/crossplane/crossplane-runtime/pkg/connection"
 	"github.com/crossplane/crossplane-runtime/pkg/controller"
@@ -25,6 +28,7 @@ import (
 	"github.com/crossplane/crossplane-runtime/pkg/reconciler/managed"
 	"github.com/crossplane/crossplane-runtime/pkg/resource"
 	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	svcapitypes "github.com/crossplane-contrib/provider-aws/apis/transfer/v1alpha1"
 	"github.com/crossplane-contrib/provider-aws/apis/v1alpha1"
@@ -33,20 +37,17 @@ import (
 	custommanaged "github.com/crossplane-contrib/provider-aws/pkg/utils/reconciler/managed"
 )
 
+type custom struct {
+	kube              client.Client
+	client            svcsdkapitransfer.TransferAPI
+	external          *external
+	vpcEndpointClient vpcEndpointClient
+}
+
 // SetupServer adds a controller that reconciles Server.
 func SetupServer(mgr ctrl.Manager, o controller.Options) error {
 	name := managed.ControllerName(svcapitypes.ServerGroupKind)
 
-	opts := []option{
-		func(e *external) {
-			e.postObserve = postObserve
-			e.postCreate = postCreate
-			e.preObserve = preObserve
-			e.preDelete = preDelete
-			e.preCreate = preCreate
-		},
-	}
-
 	cps := []managed.ConnectionPublisher{managed.NewAPISecretPublisher(mgr.GetClient(), mgr.GetScheme())}
 	if o.Features.Enabled(features.EnableAlphaExternalSecretStores) {
 		cps = append(cps, connection.NewDetailsManager(mgr.GetClient(), v1alpha1.StoreConfigGroupVersionKind))
@@ -55,7 +56,7 @@ func SetupServer(mgr ctrl.Manager, o controller.Options) error {
 	reconcilerOpts := []managed.ReconcilerOption{
 		managed.WithInitializers(),
 		managed.WithCriticalAnnotationUpdater(custommanaged.NewRetryingCriticalAnnotationUpdater(mgr.GetClient())),
-		managed.WithExternalConnecter(&connector{kube: mgr.GetClient(), opts: opts}),
+		managed.WithExternalConnecter(&customConnector{connector: &connector{kube: mgr.GetClient()}, newClientFn: newVPCClient}),
 		managed.WithPollInterval(o.PollInterval),
 		managed.WithLogger(o.Logger.WithValues("controller", name)),
 		managed.WithRecorder(event.NewAPIRecorder(mgr.GetEventRecorderFor(name))),
@@ -90,7 +91,7 @@ func preDelete(_ context.Context, cr *svcapitypes.Server, obj *svcsdk.DeleteServ
 	return false, nil
 }
 
-func postObserve(_ context.Context, cr *svcapitypes.Server, obj *svcsdk.DescribeServerOutput, obs managed.ExternalObservation, err error) (managed.ExternalObservation, error) {
+func (c *custom) postObserve(_ context.Context, cr *svcapitypes.Server, obj *svcsdk.DescribeServerOutput, obs managed.ExternalObservation, err error) (managed.ExternalObservation, error) { //nolint:gocyclo
 	if err != nil {
 		return managed.ExternalObservation{}, err
 	}
@@ -109,10 +110,25 @@ func postObserve(_ context.Context, cr *svcapitypes.Server, obj *svcsdk.Describe
 	case string(svcapitypes.State_STOP_FAILED):
 		cr.SetConditions(xpv1.ReconcileError(err))
 	}
-
 	obs.ConnectionDetails = managed.ConnectionDetails{
 		"HostKeyFingerprint": []byte(pointer.StringValue(obj.Server.HostKeyFingerprint)),
 	}
+	// fetch endpoint details for EndpointType VPC only
+	// for EndpointType 'PUBLIC' neither endpoint id nor endpoint name is present in the describe output/aws cli v2 output
+	// endpoint name can only be found in the console
+	if pointer.StringValue(cr.Spec.ForProvider.EndpointType) == "VPC" {
+		vpcEndpointsResults, err := c.DescribeVpcEndpoint(obj)
+		if err != nil {
+			return managed.ExternalObservation{}, err
+		}
+
+		for i, vep := range vpcEndpointsResults {
+			for j, dnsEntry := range vep.DnsEntries {
+				key := fmt.Sprintf("endpoint.%d.dns.%d", i, j)
+				obs.ConnectionDetails[key] = []byte(pointer.StringValue(dnsEntry.DnsName))
+			}
+		}
+	}
 
 	return obs, nil
 }
@@ -155,3 +171,18 @@ func preCreate(_ context.Context, cr *svcapitypes.Server, obj *svcsdk.CreateServ
 
 	return nil
 }
+
+func (c *custom) DescribeVpcEndpoint(obj *svcsdk.DescribeServerOutput) (dnsEntries []*ec2.VpcEndpoint, err error) {
+	if obj.Server != nil && obj.Server.EndpointDetails != nil && obj.Server.EndpointDetails.VpcEndpointId != nil {
+		describeEndpointOutput, err := c.vpcEndpointClient.DescribeVpcEndpoints(&ec2.DescribeVpcEndpointsInput{
+			VpcEndpointIds: []*string{
+				obj.Server.EndpointDetails.VpcEndpointId,
+			},
+		})
+		if err != nil {
+			return []*ec2.VpcEndpoint{}, err
+		}
+		return describeEndpointOutput.VpcEndpoints, nil
+	}
+	return []*ec2.VpcEndpoint{}, nil
+}