Assign DNS name to the cluster.

DNS name is generated from the team name and cluster name.
Use "zalando.org/dnsname" service annotation that makes 'mate' service assign a CNAME to the load balancer name.

pkg/util/resources/factory.go

@@ -11,13 +11,17 @@ import (
 	"k8s.io/client-go/pkg/util/intstr"
 
 	"github.bus.zalan.do/acid/postgres-operator/pkg/spec"
+	"github.bus.zalan.do/acid/postgres-operator/pkg/util"
 	"github.bus.zalan.do/acid/postgres-operator/pkg/util/constants"
 )
 
 const (
-	superuserName       = "postgres"
-	replicationUsername = "replication"
-	dataVolumeName      = "pgdata"
+	superuserName            = "postgres"
+	replicationUsername      = "replication"
+	dataVolumeName           = "pgdata"
+	zalandoDnsNameAnnotation = "zalando.org/dnsname"
+	// TODO: move DbHostedZone to operator configuration
+	DbHostedZone = "db.example.com"
 )
 
 func credentialSecretName(clusterName, username string) string {
@@ -248,12 +252,13 @@ func UserSecrets(cluster spec.ClusterName, pgUsers map[string]spec.PgUser) (secr
 	return
 }
 
-func Service(cluster spec.ClusterName, allowedSourceRanges []string) *v1.Service {
+func Service(cluster spec.ClusterName, teamName string, allowedSourceRanges []string) *v1.Service {
 	service := &v1.Service{
 		ObjectMeta: v1.ObjectMeta{
-			Name:      cluster.Name,
-			Namespace: cluster.Namespace,
-			Labels:    labelsSet(cluster.Name),
+			Name:        cluster.Name,
+			Namespace:   cluster.Namespace,
+			Labels:      labelsSet(cluster.Name),
+			Annotations: map[string]string{zalandoDnsNameAnnotation: util.ClusterDNSName(cluster.Name, teamName, DbHostedZone)},
 		},
 		Spec: v1.ServiceSpec{
 			Type:  v1.ServiceTypeLoadBalancer,

pkg/util/util.go

@@ -4,6 +4,7 @@ import (
 	"math/rand"
 	"time"
 
+	"fmt"
 	"github.bus.zalan.do/acid/postgres-operator/pkg/spec"
 	"k8s.io/client-go/pkg/api/v1"
 	"k8s.io/client-go/pkg/types"
@@ -43,3 +44,7 @@ func PodClusterName(pod *v1.Pod) spec.ClusterName {
 
 	return spec.ClusterName{}
 }
+
+func ClusterDNSName(clusterName, teamName, hostedZone string) string {
+	return fmt.Sprintf("%s.%s.%s", clusterName, teamName, hostedZone)
+}