Exemplo n.º 1
0
// reconcileDeployments reconciles existing deployment replica counts which
// could have diverged outside the deployment process (e.g. due to auto or
// manual scaling, or partial deployments). The active deployment is the last
// successful deployment, not necessarily the latest in terms of the config
// version. The active deployment replica count should follow the config, and
// all other deployments should be scaled to zero.
//
// Previously, scaling behavior was that the config replica count was used
// only for initial deployments and the active deployment had to be scaled up
// directly. To continue supporting that old behavior we must detect when the
// deployment has been directly manipulated, and if so, preserve the directly
// updated value and sync the config with the deployment.
func (c *DeploymentConfigController) reconcileDeployments(existingDeployments []kapi.ReplicationController, config *deployapi.DeploymentConfig) error {
	latestIsDeployed, latestDeployment := deployutil.LatestDeploymentInfo(config, existingDeployments)
	if !latestIsDeployed {
		// We shouldn't be reconciling if the latest deployment hasn't been
		// created; this is enforced on the calling side, but double checking
		// can't hurt.
		return c.updateStatus(config, existingDeployments)
	}
	activeDeployment := deployutil.ActiveDeployment(existingDeployments)
	// Compute the replica count for the active deployment (even if the active
	// deployment doesn't exist). The active replica count is the value that
	// should be assigned to the config, to allow the replica propagation to
	// flow downward from the config.
	//
	// By default we'll assume the config replicas should be used to update the
	// active deployment except in special cases (like first sync or externally
	// updated deployments.)
	activeReplicas := config.Spec.Replicas
	source := "the deploymentConfig itself (no change)"

	activeDeploymentExists := activeDeployment != nil
	activeDeploymentIsLatest := activeDeploymentExists && activeDeployment.Name == latestDeployment.Name
	latestDesiredReplicas, latestHasDesiredReplicas := deployutil.DeploymentDesiredReplicas(latestDeployment)

	switch {
	case activeDeploymentExists && activeDeploymentIsLatest:
		// The active/latest deployment follows the config unless this is its first
		// sync or if an external change to the deployment replicas is detected.
		lastActiveReplicas, hasLastActiveReplicas := deployutil.DeploymentReplicas(activeDeployment)
		if !hasLastActiveReplicas || lastActiveReplicas != activeDeployment.Spec.Replicas {
			activeReplicas = activeDeployment.Spec.Replicas
			source = fmt.Sprintf("the latest/active deployment %q which was scaled directly or has not previously been synced", deployutil.LabelForDeployment(activeDeployment))
		}
	case activeDeploymentExists && !activeDeploymentIsLatest:
		// The active/non-latest deployment follows the config if it was
		// previously synced; if this is the first sync, infer what the config
		// value should be based on either the latest desired or whatever the
		// deployment is currently scaled to.
		_, hasLastActiveReplicas := deployutil.DeploymentReplicas(activeDeployment)
		if hasLastActiveReplicas {
			break
		}
		if latestHasDesiredReplicas {
			activeReplicas = latestDesiredReplicas
			source = fmt.Sprintf("the desired replicas of latest deployment %q which has not been previously synced", deployutil.LabelForDeployment(latestDeployment))
		} else if activeDeployment.Spec.Replicas > 0 {
			activeReplicas = activeDeployment.Spec.Replicas
			source = fmt.Sprintf("the active deployment %q which has not been previously synced", deployutil.LabelForDeployment(activeDeployment))
		}
	case !activeDeploymentExists && latestHasDesiredReplicas:
		// If there's no active deployment, use the latest desired, if available.
		activeReplicas = latestDesiredReplicas
		source = fmt.Sprintf("the desired replicas of latest deployment %q with no active deployment", deployutil.LabelForDeployment(latestDeployment))
	}

	// Bring the config in sync with the deployment. Once we know the config
	// accurately represents the desired replica count of the active deployment,
	// we can safely reconcile deployments.
	//
	// If the deployment config is test, never update the deployment config based
	// on deployments, since test behavior overrides user scaling.
	switch {
	case config.Spec.Replicas == activeReplicas:
	case config.Spec.Test:
		glog.V(4).Infof("Detected changed replicas for test deploymentConfig %q, ignoring that change", deployutil.LabelForDeploymentConfig(config))
	default:
		copied, err := deployutil.DeploymentConfigDeepCopy(config)
		if err != nil {
			return err
		}
		oldReplicas := copied.Spec.Replicas
		copied.Spec.Replicas = activeReplicas
		config, err = c.dn.DeploymentConfigs(copied.Namespace).Update(copied)
		if err != nil {
			return err
		}
		glog.V(4).Infof("Synced deploymentConfig %q replicas from %d to %d based on %s", deployutil.LabelForDeploymentConfig(config), oldReplicas, activeReplicas, source)
	}

	// Reconcile deployments. The active deployment follows the config, and all
	// other deployments should be scaled to zero.
	var updatedDeployments []kapi.ReplicationController
	for i := range existingDeployments {
		deployment := existingDeployments[i]
		toAppend := deployment

		isActiveDeployment := activeDeployment != nil && deployment.Name == activeDeployment.Name

		oldReplicaCount := deployment.Spec.Replicas
		newReplicaCount := int32(0)
		if isActiveDeployment {
			newReplicaCount = activeReplicas
		}
		if config.Spec.Test {
			glog.V(4).Infof("Deployment config %q is test and deployment %q will be scaled down", deployutil.LabelForDeploymentConfig(config), deployutil.LabelForDeployment(&deployment))
			newReplicaCount = 0
		}
		lastReplicas, hasLastReplicas := deployutil.DeploymentReplicas(&deployment)
		// Only update if necessary.
		var copied *kapi.ReplicationController
		if !hasLastReplicas || newReplicaCount != oldReplicaCount || lastReplicas != newReplicaCount {
			if err := kclient.RetryOnConflict(kclient.DefaultBackoff, func() error {
				// refresh the replication controller version
				rc, err := c.rcStore.ReplicationControllers(deployment.Namespace).Get(deployment.Name)
				if err != nil {
					return err
				}
				copied, err = deployutil.DeploymentDeepCopy(rc)
				if err != nil {
					glog.V(2).Infof("Deep copy of deployment %q failed: %v", rc.Name, err)
					return err
				}
				copied.Spec.Replicas = newReplicaCount
				copied.Annotations[deployapi.DeploymentReplicasAnnotation] = strconv.Itoa(int(newReplicaCount))
				_, err = c.rn.ReplicationControllers(copied.Namespace).Update(copied)
				return err
			}); err != nil {
				c.recorder.Eventf(config, kapi.EventTypeWarning, "DeploymentScaleFailed",
					"Failed to scale deployment %q from %d to %d: %v", deployment.Name, oldReplicaCount, newReplicaCount, err)
				return err
			}

			// Only report scaling events if we changed the replica count.
			if oldReplicaCount != newReplicaCount {
				c.recorder.Eventf(config, kapi.EventTypeNormal, "DeploymentScaled",
					"Scaled deployment %q from %d to %d", copied.Name, oldReplicaCount, newReplicaCount)
			} else {
				glog.V(4).Infof("Updated deployment %q replica annotation to match current replica count %d", deployutil.LabelForDeployment(copied), newReplicaCount)
			}
			toAppend = *copied
		}

		updatedDeployments = append(updatedDeployments, toAppend)
	}

	// As the deployment configuration has changed, we need to make sure to clean
	// up old deployments if we have now reached our deployment history quota
	if err := c.cleanupOldDeployments(existingDeployments, config); err != nil {
		c.recorder.Eventf(config, kapi.EventTypeWarning, "DeploymentCleanupFailed", "Couldn't clean up deployments: %v", err)
	}

	return c.updateStatus(config, updatedDeployments)
}
Exemplo n.º 2
0
// reconcileDeployments reconciles existing deployment replica counts which
// could have diverged outside the deployment process (e.g. due to auto or
// manual scaling, or partial deployments). The active deployment is the last
// successful deployment, not necessarily the latest in terms of the config
// version. The active deployment replica count should follow the config, and
// all other deployments should be scaled to zero.
//
// Previously, scaling behavior was that the config replica count was used
// only for initial deployments and the active deployment had to be scaled up
// directly. To continue supporting that old behavior we must detect when the
// deployment has been directly manipulated, and if so, preserve the directly
// updated value and sync the config with the deployment.
func (c *DeploymentConfigController) reconcileDeployments(existingDeployments *kapi.ReplicationControllerList, config *deployapi.DeploymentConfig) error {
	latestIsDeployed, latestDeployment := deployutil.LatestDeploymentInfo(config, existingDeployments)
	if !latestIsDeployed {
		// We shouldn't be reconciling if the latest deployment hasn't been
		// created; this is enforced on the calling side, but double checking
		// can't hurt.
		return nil
	}
	activeDeployment := deployutil.ActiveDeployment(config, existingDeployments)
	// Compute the replica count for the active deployment (even if the active
	// deployment doesn't exist). The active replica count is the value that
	// should be assigned to the config, to allow the replica propagation to
	// flow downward from the config.
	//
	// By default we'll assume the config replicas should be used to update the
	// active deployment except in special cases (like first sync or externally
	// updated deployments.)
	activeReplicas := config.Spec.Replicas
	source := "the deploymentConfig itself (no change)"

	activeDeploymentExists := activeDeployment != nil
	activeDeploymentIsLatest := activeDeploymentExists && activeDeployment.Name == latestDeployment.Name
	latestDesiredReplicas, latestHasDesiredReplicas := deployutil.DeploymentDesiredReplicas(latestDeployment)

	switch {
	case activeDeploymentExists && activeDeploymentIsLatest:
		// The active/latest deployment follows the config unless this is its first
		// sync or if an external change to the deployment replicas is detected.
		lastActiveReplicas, hasLastActiveReplicas := deployutil.DeploymentReplicas(activeDeployment)
		if !hasLastActiveReplicas || lastActiveReplicas != activeDeployment.Spec.Replicas {
			activeReplicas = activeDeployment.Spec.Replicas
			source = fmt.Sprintf("the latest/active deployment %q which was scaled directly or has not previously been synced", deployutil.LabelForDeployment(activeDeployment))
		}
	case activeDeploymentExists && !activeDeploymentIsLatest:
		// The active/non-latest deployment follows the config if it was
		// previously synced; if this is the first sync, infer what the config
		// value should be based on either the latest desired or whatever the
		// deployment is currently scaled to.
		_, hasLastActiveReplicas := deployutil.DeploymentReplicas(activeDeployment)
		if hasLastActiveReplicas {
			break
		}
		if latestHasDesiredReplicas {
			activeReplicas = latestDesiredReplicas
			source = fmt.Sprintf("the desired replicas of latest deployment %q which has not been previously synced", deployutil.LabelForDeployment(latestDeployment))
		} else if activeDeployment.Spec.Replicas > 0 {
			activeReplicas = activeDeployment.Spec.Replicas
			source = fmt.Sprintf("the active deployment %q which has not been previously synced", deployutil.LabelForDeployment(activeDeployment))
		}
	case !activeDeploymentExists && latestHasDesiredReplicas:
		// If there's no active deployment, use the latest desired, if available.
		activeReplicas = latestDesiredReplicas
		source = fmt.Sprintf("the desired replicas of latest deployment %q with no active deployment", deployutil.LabelForDeployment(latestDeployment))
	}

	// Bring the config in sync with the deployment. Once we know the config
	// accurately represents the desired replica count of the active deployment,
	// we can safely reconcile deployments.
	//
	// If the deployment config is test, never update the deployment config based
	// on deployments, since test behavior overrides user scaling.
	switch {
	case config.Spec.Replicas == activeReplicas:
	case config.Spec.Test:
		glog.V(4).Infof("Detected changed replicas for test deploymentConfig %q, ignoring that change", deployutil.LabelForDeploymentConfig(config))
	default:
		oldReplicas := config.Spec.Replicas
		config.Spec.Replicas = activeReplicas
		var err error
		config, err = c.osClient.DeploymentConfigs(config.Namespace).Update(config)
		if err != nil {
			return err
		}
		glog.V(4).Infof("Synced deploymentConfig %q replicas from %d to %d based on %s", deployutil.LabelForDeploymentConfig(config), oldReplicas, activeReplicas, source)
	}

	// Reconcile deployments. The active deployment follows the config, and all
	// other deployments should be scaled to zero.
	for _, deployment := range existingDeployments.Items {
		isActiveDeployment := activeDeployment != nil && deployment.Name == activeDeployment.Name

		oldReplicaCount := deployment.Spec.Replicas
		newReplicaCount := 0
		if isActiveDeployment {
			newReplicaCount = activeReplicas
		}
		if config.Spec.Test {
			glog.V(4).Infof("Deployment config %q is test and deployment %q will be scaled down", deployutil.LabelForDeploymentConfig(config), deployutil.LabelForDeployment(&deployment))
			newReplicaCount = 0
		}
		lastReplicas, hasLastReplicas := deployutil.DeploymentReplicas(&deployment)
		// Only update if necessary.
		if !hasLastReplicas || newReplicaCount != oldReplicaCount || lastReplicas != newReplicaCount {
			deployment.Spec.Replicas = newReplicaCount
			deployment.Annotations[deployapi.DeploymentReplicasAnnotation] = strconv.Itoa(newReplicaCount)
			_, err := c.kubeClient.ReplicationControllers(deployment.Namespace).Update(&deployment)
			if err != nil {
				c.recorder.Eventf(config, kapi.EventTypeWarning, "DeploymentScaleFailed",
					"Failed to scale deployment %q from %d to %d: %s", deployment.Name, oldReplicaCount, newReplicaCount, err)
				return err
			}
			// Only report scaling events if we changed the replica count.
			if oldReplicaCount != newReplicaCount {
				c.recorder.Eventf(config, kapi.EventTypeNormal, "DeploymentScaled",
					"Scaled deployment %q from %d to %d", deployment.Name, oldReplicaCount, newReplicaCount)
			} else {
				glog.V(4).Infof("Updated deployment %q replica annotation to match current replica count %d", deployutil.LabelForDeployment(&deployment), newReplicaCount)
			}
		}
	}

	return c.updateStatus(config)
}
Exemplo n.º 3
0
// reconcileDeployments reconciles existing deployment replica counts which
// could have diverged outside the deployment process (e.g. due to auto or
// manual scaling, or partial deployments). The active deployment is the last
// successful deployment, not necessarily the latest in terms of the config
// version. The active deployment replica count should follow the config, and
// all other deployments should be scaled to zero.
//
// Previously, scaling behavior was that the config replica count was used
// only for initial deployments and the active deployment had to be scaled up
// directly. To continue supporting that old behavior we must detect when the
// deployment has been directly manipulated, and if so, preserve the directly
// updated value and sync the config with the deployment.
func (c *DeploymentConfigController) reconcileDeployments(existingDeployments *kapi.ReplicationControllerList, config *deployapi.DeploymentConfig) error {
	latestIsDeployed, latestDeployment := deployutil.LatestDeploymentInfo(config, existingDeployments)
	if !latestIsDeployed {
		// We shouldn't be reconciling if the latest deployment hasn't been
		// created; this is enforced on the calling side, but double checking
		// can't hurt.
		return nil
	}
	activeDeployment := deployutil.ActiveDeployment(config, existingDeployments)
	// Compute the replica count for the active deployment (even if the active
	// deployment doesn't exist). The active replica count is the value that
	// should be assigned to the config, to allow the replica propagation to
	// flow downward from the config.
	//
	// This takes into account resources predating the propagation behavior
	// change, as well as external modifications to the deployments (e.g.
	// scalers).
	activeReplicas := config.Template.ControllerTemplate.Replicas
	source := "the deploymentConfig itself (no change)"
	if activeDeployment != nil {
		activeDeploymentIsLatest := activeDeployment.Name == latestDeployment.Name
		lastActiveReplicas, hasLastActiveReplicas := deployutil.DeploymentReplicas(activeDeployment)
		if activeDeploymentIsLatest {
			if !hasLastActiveReplicas || lastActiveReplicas != activeDeployment.Spec.Replicas {
				activeReplicas = activeDeployment.Spec.Replicas
				source = fmt.Sprintf("the latest/active deployment %q which was scaled directly or has not previously been synced", deployutil.LabelForDeployment(activeDeployment))
			}
		} else {
			if hasLastActiveReplicas {
				if lastActiveReplicas != activeDeployment.Spec.Replicas && activeDeployment.Spec.Replicas > 0 {
					activeReplicas = activeDeployment.Spec.Replicas
					source = fmt.Sprintf("the active deployment %q which was scaled directly", deployutil.LabelForDeployment(activeDeployment))
				}
			} else {
				if activeDeployment.Spec.Replicas > 0 {
					activeReplicas = activeDeployment.Spec.Replicas
					source = fmt.Sprintf("the active deployment %q which has not been previously synced", deployutil.LabelForDeployment(activeDeployment))
				} else {
					latestDesiredReplicas, latestHasDesiredReplicas := deployutil.DeploymentDesiredReplicas(latestDeployment)
					if latestHasDesiredReplicas {
						activeReplicas = latestDesiredReplicas
						source = fmt.Sprintf("the desired replicas of latest deployment %q which has not been previously synced", deployutil.LabelForDeployment(latestDeployment))
					}
				}
			}
		}
	} else {
		latestDesiredReplicas, latestHasDesiredReplicas := deployutil.DeploymentDesiredReplicas(latestDeployment)
		if latestHasDesiredReplicas {
			activeReplicas = latestDesiredReplicas
			source = fmt.Sprintf("the desired replicas of latest deployment %q with no active deployment", deployutil.LabelForDeployment(latestDeployment))
		}
	}
	// Bring the config in sync with the deployment. Once we know the config
	// accurately represents the desired replica count of the active deployment,
	// we can safely reconcile deployments.
	if config.Template.ControllerTemplate.Replicas != activeReplicas {
		oldReplicas := config.Template.ControllerTemplate.Replicas
		config.Template.ControllerTemplate.Replicas = activeReplicas
		_, err := c.osClient.DeploymentConfigs(config.Namespace).Update(config)
		if err != nil {
			return err
		}
		glog.V(4).Infof("Synced deploymentConfig %q replicas from %d to %d based on %s", deployutil.LabelForDeploymentConfig(config), oldReplicas, activeReplicas, source)
	}
	// Reconcile deployments. The active deployment follows the config, and all
	// other deployments should be scaled to zero.
	for _, deployment := range existingDeployments.Items {
		isActiveDeployment := activeDeployment != nil && deployment.Name == activeDeployment.Name

		oldReplicaCount := deployment.Spec.Replicas
		newReplicaCount := 0
		if isActiveDeployment {
			newReplicaCount = activeReplicas
		}
		lastReplicas, hasLastReplicas := deployutil.DeploymentReplicas(&deployment)
		// Only update if necessary.
		if !hasLastReplicas || newReplicaCount != oldReplicaCount || lastReplicas != newReplicaCount {
			deployment.Spec.Replicas = newReplicaCount
			deployment.Annotations[deployapi.DeploymentReplicasAnnotation] = strconv.Itoa(newReplicaCount)
			_, err := c.kubeClient.ReplicationControllers(deployment.Namespace).Update(&deployment)
			if err != nil {
				c.recorder.Eventf(config, "DeploymentScaleFailed",
					"Failed to scale deployment %q from %d to %d: %s", deployment.Name, oldReplicaCount, newReplicaCount, err)
				return err
			}
			// Only report scaling events if we changed the replica count.
			if oldReplicaCount != newReplicaCount {
				c.recorder.Eventf(config, "DeploymentScaled",
					"Scaled deployment %q from %d to %d", deployment.Name, oldReplicaCount, newReplicaCount)
			} else {
				glog.V(4).Infof("Updated deployment %q replica annotation to match current replica count %d", deployutil.LabelForDeployment(&deployment), newReplicaCount)
			}
		}
	}
	return nil
}