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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.
This commit is contained in:
Oleksii Kliukin 2017-03-09 17:35:19 +01:00 committed by Murat Kabilov
parent 45fcb2adc9
commit 55dbacdfa6
4 changed files with 23 additions and 9 deletions
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6
pkg/cluster/cluster.go
View File

@ -88,6 +88,10 @@ func (c *Cluster) ClusterName() spec.ClusterName {
}
}
func (c *Cluster) ClusterTeamName() string {
return c.Spec.TeamId
}
func (c *Cluster) Run(stopCh <-chan struct{}) {
go c.podEventsDispatcher(stopCh)
@ -199,7 +203,7 @@ func (c *Cluster) Update(newSpec *spec.Postgresql) error {
newStatefulSet := getStatefulSet(c.ClusterName(), newSpec.Spec, c.etcdHost, c.dockerImage)
newService := resources.Service(c.ClusterName(), newSpec.Spec.AllowedSourceRanges)
newService := resources.Service(c.ClusterName(), c.ClusterTeamName(), newSpec.Spec.AllowedSourceRanges)
if !servicesEqual(newService, c.Service) {
c.logger.Infof("Service needs to be upated")
if err := c.updateService(newService); err != nil {

2
pkg/cluster/resources.go
View File

@ -148,7 +148,7 @@ func (c *Cluster) createService() (*v1.Service, error) {
if c.Service != nil {
return nil, fmt.Errorf("Service already exists in the cluster")
}
serviceSpec := resources.Service(c.ClusterName(), c.Spec.AllowedSourceRanges)
serviceSpec := resources.Service(c.ClusterName(), c.ClusterTeamName(), c.Spec.AllowedSourceRanges)
service, err := c.config.KubeClient.Services(serviceSpec.Namespace).Create(serviceSpec)
if k8sutil.ResourceAlreadyExists(err) {

19
pkg/util/resources/factory.go
View File

@ -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,

5
pkg/util/util.go
View File

@ -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)
}