dnsprovider route53: log changeset details at v(8)

Otherwise it can be hard to know exactly what is changing and whether
the changes could be optimized, or to troubleshoot if someone were
accidentally to have a bug in their calling code.

federation/pkg/dnsprovider/providers/aws/route53/BUILD

@@ -27,6 +27,7 @@ go_library(
         "//vendor:github.com/aws/aws-sdk-go/aws",
         "//vendor:github.com/aws/aws-sdk-go/aws/session",
         "//vendor:github.com/aws/aws-sdk-go/service/route53",
+        "//vendor:github.com/golang/glog",
         "//vendor:k8s.io/apimachinery/pkg/util/uuid",
     ],
 )

federation/pkg/dnsprovider/providers/aws/route53/rrchangeset.go

@@ -17,8 +17,12 @@ limitations under the License.
 package route53
 
 import (
+	"bytes"
+	"fmt"
+
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/route53"
+	"github.com/golang/glog"
 	"k8s.io/kubernetes/federation/pkg/dnsprovider"
 )
 
@@ -93,6 +97,15 @@ func (c *ResourceRecordChangeset) Apply() error {
 		return nil
 	}
 
+	if glog.V(8) {
+		var sb bytes.Buffer
+		for _, change := range changes {
+			sb.WriteString(fmt.Sprintf("\t%s %s %s\n", aws.StringValue(change.Action), aws.StringValue(change.ResourceRecordSet.Type), aws.StringValue(change.ResourceRecordSet.Name)))
+		}
+
+		glog.V(8).Infof("Route53 Changeset:\n%s", sb.String())
+	}
+
 	service := c.zone.zones.interface_.service
 
 	request := &route53.ChangeResourceRecordSetsInput{