// 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
}
// This operation doesn't normally take very long (and happens pretty often), so we only record the final event
name := cloudprovider.GetLoadBalancerName(service)
err := s.balancer.UpdateTCPLoadBalancer(name, s.zone.Region, hosts)
if err == nil {
s.eventRecorder.Event(service, "UpdatedLoadBalancer", "Updated load balancer with new hosts")
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", name, err)
} else if !exists {
return nil
}
s.eventRecorder.Eventf(service, "LoadBalancerUpdateFailed", "Error updating load balancer with new hosts: %v", err)
return err
}
func (s *ServiceController) loadBalancerName(service *api.Service) string {
return cloudprovider.GetLoadBalancerName(service)
}