func (proxier *Proxier) sameConfig(info *serviceInfo, service *api.Service, port *api.ServicePort) bool {
if info.protocol != port.Protocol || info.port != port.Port || info.nodePort != port.NodePort {
return false
}
if !info.clusterIP.Equal(net.ParseIP(service.Spec.ClusterIP)) {
return false
}
if !ipsEqual(info.externalIPs, service.Spec.ExternalIPs) {
return false
}
if !api.LoadBalancerStatusEqual(&info.loadBalancerStatus, &service.Status.LoadBalancer) {
return false
}
if info.sessionAffinityType != service.Spec.SessionAffinity {
return false
}
return true
}
// Returns whatever error occurred along with a boolean indicator of whether it
// should be retried.
func (s *ServiceController) createLoadBalancerIfNeeded(namespacedName types.NamespacedName, service, appliedState *api.Service) (error, bool) {
if appliedState != nil && !needsUpdate(appliedState, service) {
glog.Infof("LB already exists and doesn't need update for service %s", namespacedName)
return nil, notRetryable
}
// Note: It is safe to just call EnsureTCPLoadBalancer. But, on some clouds that requires a delete & create,
// which may involve service interruption. Also, we would like user-friendly events.
// Save the state so we can avoid a write if it doesn't change
previousState := api.LoadBalancerStatusDeepCopy(&service.Status.LoadBalancer)
if !wantsExternalLoadBalancer(service) {
needDelete := true
if appliedState != nil {
if !wantsExternalLoadBalancer(appliedState) {
needDelete = false
}
} else {
// If we don't have any cached memory of the load balancer, we have to ask
// the cloud provider for what it knows about it.
// Technically EnsureTCPLoadBalancerDeleted can cope, but we want to post meaningful events
_, exists, err := s.balancer.GetTCPLoadBalancer(s.loadBalancerName(service), s.zone.Region)
if err != nil {
return fmt.Errorf("Error getting LB for service %s: %v", namespacedName, err), retryable
}
if !exists {
needDelete = false
}
}
if needDelete {
glog.Infof("Deleting existing load balancer for service %s that no longer needs a load balancer.", namespacedName)
s.eventRecorder.Event(service, "DeletingLoadBalancer", "Deleting load balancer")
if err := s.balancer.EnsureTCPLoadBalancerDeleted(s.loadBalancerName(service), s.zone.Region); err != nil {
return err, retryable
}
s.eventRecorder.Event(service, "DeletedLoadBalancer", "Deleted load balancer")
}
service.Status.LoadBalancer = api.LoadBalancerStatus{}
} else {
glog.V(2).Infof("Ensuring LB for service %s", namespacedName)
// TODO: We could do a dry-run here if wanted to avoid the spurious cloud-calls & events when we restart
// The load balancer doesn't exist yet, so create it.
s.eventRecorder.Event(service, "CreatingLoadBalancer", "Creating load balancer")
err := s.createLoadBalancer(service)
if err != nil {
return fmt.Errorf("Failed to create load balancer for service %s: %v", namespacedName, err), retryable
}
s.eventRecorder.Event(service, "CreatedLoadBalancer", "Created load balancer")
}
// Write the state if changed
// TODO: Be careful here ... what if there were other changes to the service?
if !api.LoadBalancerStatusEqual(previousState, &service.Status.LoadBalancer) {
if err := s.persistUpdate(service); err != nil {
return fmt.Errorf("Failed to persist updated status to apiserver, even after retries. Giving up: %v", err), notRetryable
}
} else {
glog.V(2).Infof("Not persisting unchanged LoadBalancerStatus to registry.")
}
return nil, notRetryable
}