// SetCondition adds/replaces the given condition in the replication controller status.
func SetCondition(status *api.ReplicationControllerStatus, condition api.ReplicationControllerCondition) {
currentCond := GetCondition(*status, condition.Type)
if currentCond != nil && currentCond.Status == condition.Status && currentCond.Reason == condition.Reason {
return
}
newConditions := filterOutCondition(status.Conditions, condition.Type)
status.Conditions = append(newConditions, condition)
}
// updateReplicationControllerStatus attempts to update the Status.Replicas of the given controller, with a single GET/PUT retry.
func updateReplicationControllerStatus(c unversionedcore.ReplicationControllerInterface, rc api.ReplicationController, newStatus api.ReplicationControllerStatus) (updateErr error) {
// This is the steady state. It happens when the rc doesn't have any expectations, since
// we do a periodic relist every 30s. If the generations differ but the replicas are
// the same, a caller might've resized to the same replica count.
if rc.Status.Replicas == newStatus.Replicas &&
rc.Status.FullyLabeledReplicas == newStatus.FullyLabeledReplicas &&
rc.Status.ReadyReplicas == newStatus.ReadyReplicas &&
rc.Status.AvailableReplicas == newStatus.AvailableReplicas &&
rc.Generation == rc.Status.ObservedGeneration &&
reflect.DeepEqual(rc.Status.Conditions, newStatus.Conditions) {
return nil
}
// Save the generation number we acted on, otherwise we might wrongfully indicate
// that we've seen a spec update when we retry.
// TODO: This can clobber an update if we allow multiple agents to write to the
// same status.
newStatus.ObservedGeneration = rc.Generation
var getErr error
for i, rc := 0, &rc; ; i++ {
glog.V(4).Infof(fmt.Sprintf("Updating replica count for rc: %s/%s, ", rc.Namespace, rc.Name) +
fmt.Sprintf("replicas %d->%d (need %d), ", rc.Status.Replicas, newStatus.Replicas, rc.Spec.Replicas) +
fmt.Sprintf("fullyLabeledReplicas %d->%d, ", rc.Status.FullyLabeledReplicas, newStatus.FullyLabeledReplicas) +
fmt.Sprintf("readyReplicas %d->%d, ", rc.Status.ReadyReplicas, newStatus.ReadyReplicas) +
fmt.Sprintf("availableReplicas %d->%d, ", rc.Status.AvailableReplicas, newStatus.AvailableReplicas) +
fmt.Sprintf("sequence No: %v->%v", rc.Status.ObservedGeneration, newStatus.ObservedGeneration))
rc.Status = newStatus
_, updateErr = c.UpdateStatus(rc)
if updateErr == nil || i >= statusUpdateRetries {
return updateErr
}
// Update the controller with the latest resource version for the next poll
if rc, getErr = c.Get(rc.Name); getErr != nil {
// If the GET fails we can't trust status.Replicas anymore. This error
// is bound to be more interesting than the update failure.
return getErr
}
}
}
// RemoveCondition removes the condition with the provided type from the replication controller status.
func RemoveCondition(status *api.ReplicationControllerStatus, condType api.ReplicationControllerConditionType) {
status.Conditions = filterOutCondition(status.Conditions, condType)
}