// reconcileExternalServices updates balancers for external services, so that they will match the nodes given.
// Returns true if something went wrong and we should call reconcile again.
func (nc *NodeController) reconcileExternalServices(nodes *api.NodeList) (shouldRetry bool) {
balancer, ok := nc.cloud.TCPLoadBalancer()
if !ok {
glog.Error("The cloud provider does not support external TCP load balancers.")
return false
}
zones, ok := nc.cloud.Zones()
if !ok {
glog.Error("The cloud provider does not support zone enumeration.")
return false
}
zone, err := zones.GetZone()
if err != nil {
glog.Errorf("Error while getting zone: %v", err)
return false
}
hosts := []string{}
for _, node := range nodes.Items {
hosts = append(hosts, node.Name)
}
services, err := nc.kubeClient.Services(api.NamespaceAll).List(labels.Everything())
if err != nil {
glog.Errorf("Error while listing services: %v", err)
return true
}
shouldRetry = false
for _, service := range services.Items {
if service.Spec.CreateExternalLoadBalancer {
nonTCPPort := false
for i := range service.Spec.Ports {
if service.Spec.Ports[i].Protocol != api.ProtocolTCP {
nonTCPPort = true
break
}
}
if nonTCPPort {
// TODO: Support UDP here.
glog.Errorf("External load balancers for non TCP services are not currently supported: %v.", service)
continue
}
name := cloudprovider.GetLoadBalancerName(&service)
err := balancer.UpdateTCPLoadBalancer(name, zone.Region, hosts)
if err != nil {
glog.Errorf("External error while updating TCP load balancer: %v.", err)
shouldRetry = true
}
}
}
return shouldRetry
}
// Updates the external load balancer of a service, assuming we hold the mutex
// associated with the service.
func (s *ServiceController) lockedUpdateLoadBalancerHosts(service *api.Service, hosts []string) error {
if !wantsExternalLoadBalancer(service) {
return nil
}
name := cloudprovider.GetLoadBalancerName(service)
err := s.balancer.UpdateTCPLoadBalancer(name, s.zone.Region, hosts)
if err == nil {
return nil
}
// It's only an actual error if the load balancer still exists.
if _, exists, err := s.balancer.GetTCPLoadBalancer(name, s.zone.Region); err != nil {
glog.Errorf("External error while checking if TCP load balancer %q exists: name, %v")
} else if !exists {
return nil
}
return err
}
func (s *ServiceController) loadBalancerName(service *api.Service) string {
return cloudprovider.GetLoadBalancerName(service)
}