Beispiel #1
0
// calculateStatus calculates the latest status for the provided deployment by looking into the provided replica sets.
func calculateStatus(allRSs []*extensions.ReplicaSet, newRS *extensions.ReplicaSet, deployment *extensions.Deployment) extensions.DeploymentStatus {
	availableReplicas := deploymentutil.GetAvailableReplicaCountForReplicaSets(allRSs)
	totalReplicas := deploymentutil.GetReplicaCountForReplicaSets(allRSs)
	unavailableReplicas := totalReplicas - availableReplicas
	// If unavailableReplicas is negative, then that means the Deployment has more available replicas running than
	// desired, eg. whenever it scales down. In such a case we should simply default unavailableReplicas to zero.
	if unavailableReplicas < 0 {
		unavailableReplicas = 0
	}

	status := extensions.DeploymentStatus{
		// TODO: Ensure that if we start retrying status updates, we won't pick up a new Generation value.
		ObservedGeneration:  deployment.Generation,
		Replicas:            deploymentutil.GetActualReplicaCountForReplicaSets(allRSs),
		UpdatedReplicas:     deploymentutil.GetActualReplicaCountForReplicaSets([]*extensions.ReplicaSet{newRS}),
		AvailableReplicas:   availableReplicas,
		UnavailableReplicas: unavailableReplicas,
	}

	// Copy conditions one by one so we won't mutate the original object.
	conditions := deployment.Status.Conditions
	for i := range conditions {
		status.Conditions = append(status.Conditions, conditions[i])
	}

	if availableReplicas >= *(deployment.Spec.Replicas)-deploymentutil.MaxUnavailable(*deployment) {
		minAvailability := deploymentutil.NewDeploymentCondition(extensions.DeploymentAvailable, v1.ConditionTrue, deploymentutil.MinimumReplicasAvailable, "Deployment has minimum availability.")
		deploymentutil.SetDeploymentCondition(&status, *minAvailability)
	} else {
		noMinAvailability := deploymentutil.NewDeploymentCondition(extensions.DeploymentAvailable, v1.ConditionFalse, deploymentutil.MinimumReplicasUnavailable, "Deployment does not have minimum availability.")
		deploymentutil.SetDeploymentCondition(&status, *noMinAvailability)
	}

	return status
}
Beispiel #2
0
func (dc *DeploymentController) calculateStatus(allRSs []*extensions.ReplicaSet, newRS *extensions.ReplicaSet, deployment *extensions.Deployment) extensions.DeploymentStatus {
	availableReplicas := deploymentutil.GetAvailableReplicaCountForReplicaSets(allRSs)
	totalReplicas := deploymentutil.GetReplicaCountForReplicaSets(allRSs)

	return extensions.DeploymentStatus{
		// TODO: Ensure that if we start retrying status updates, we won't pick up a new Generation value.
		ObservedGeneration:  deployment.Generation,
		Replicas:            deploymentutil.GetActualReplicaCountForReplicaSets(allRSs),
		UpdatedReplicas:     deploymentutil.GetActualReplicaCountForReplicaSets([]*extensions.ReplicaSet{newRS}),
		AvailableReplicas:   availableReplicas,
		UnavailableReplicas: totalReplicas - availableReplicas,
	}
}
Beispiel #3
0
// scaleDownOldReplicaSetsForRollingUpdate scales down old replica sets when deployment strategy is "RollingUpdate".
// Need check maxUnavailable to ensure availability
func (dc *DeploymentController) scaleDownOldReplicaSetsForRollingUpdate(allRSs []*extensions.ReplicaSet, oldRSs []*extensions.ReplicaSet, deployment *extensions.Deployment) (int32, error) {
	maxUnavailable := deploymentutil.MaxUnavailable(*deployment)

	// Check if we can scale down.
	minAvailable := *(deployment.Spec.Replicas) - maxUnavailable
	// Find the number of available pods.
	availablePodCount := deploymentutil.GetAvailableReplicaCountForReplicaSets(allRSs)
	if availablePodCount <= minAvailable {
		// Cannot scale down.
		return 0, nil
	}
	glog.V(4).Infof("Found %d available pods in deployment %s, scaling down old RSes", availablePodCount, deployment.Name)

	sort.Sort(controller.ReplicaSetsByCreationTimestamp(oldRSs))

	totalScaledDown := int32(0)
	totalScaleDownCount := availablePodCount - minAvailable
	for _, targetRS := range oldRSs {
		if totalScaledDown >= totalScaleDownCount {
			// No further scaling required.
			break
		}
		if *(targetRS.Spec.Replicas) == 0 {
			// cannot scale down this ReplicaSet.
			continue
		}
		// Scale down.
		scaleDownCount := int32(integer.IntMin(int(*(targetRS.Spec.Replicas)), int(totalScaleDownCount-totalScaledDown)))
		newReplicasCount := *(targetRS.Spec.Replicas) - scaleDownCount
		if newReplicasCount > *(targetRS.Spec.Replicas) {
			return 0, fmt.Errorf("when scaling down old RS, got invalid request to scale down %s/%s %d -> %d", targetRS.Namespace, targetRS.Name, *(targetRS.Spec.Replicas), newReplicasCount)
		}
		_, _, err := dc.scaleReplicaSetAndRecordEvent(targetRS, newReplicasCount, deployment)
		if err != nil {
			return totalScaledDown, err
		}

		totalScaledDown += scaleDownCount
	}

	return totalScaledDown, nil
}
Beispiel #4
0
func (dc *DeploymentController) calculateStatus(allRSs []*extensions.ReplicaSet, newRS *extensions.ReplicaSet, deployment *extensions.Deployment) extensions.DeploymentStatus {
	availableReplicas := deploymentutil.GetAvailableReplicaCountForReplicaSets(allRSs)
	totalReplicas := deploymentutil.GetReplicaCountForReplicaSets(allRSs)

	if availableReplicas >= *(deployment.Spec.Replicas)-deploymentutil.MaxUnavailable(*deployment) {
		minAvailability := deploymentutil.NewDeploymentCondition(extensions.DeploymentAvailable, v1.ConditionTrue, deploymentutil.MinimumReplicasAvailable, "Deployment has minimum availability.")
		deploymentutil.SetDeploymentCondition(&deployment.Status, *minAvailability)
	} else {
		noMinAvailability := deploymentutil.NewDeploymentCondition(extensions.DeploymentAvailable, v1.ConditionFalse, deploymentutil.MinimumReplicasUnavailable, "Deployment does not have minimum availability.")
		deploymentutil.SetDeploymentCondition(&deployment.Status, *noMinAvailability)
	}

	return extensions.DeploymentStatus{
		// TODO: Ensure that if we start retrying status updates, we won't pick up a new Generation value.
		ObservedGeneration:  deployment.Generation,
		Replicas:            deploymentutil.GetActualReplicaCountForReplicaSets(allRSs),
		UpdatedReplicas:     deploymentutil.GetActualReplicaCountForReplicaSets([]*extensions.ReplicaSet{newRS}),
		AvailableReplicas:   availableReplicas,
		UnavailableReplicas: totalReplicas - availableReplicas,
		Conditions:          deployment.Status.Conditions,
	}
}