util

package
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 Go to latest Published: Nov 8, 2016 License: Apache-2.0 Imports: 21 Imported by: 0

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Constants

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const (
	// RevisionAnnotation is the revision annotation of a deployment's replica sets which records its rollout sequence
	RevisionAnnotation = "deployment.kubernetes.io/revision"
	// RevisionHistoryAnnotation maintains the history of all old revisions that a replica set has served for a deployment.
	RevisionHistoryAnnotation = "deployment.kubernetes.io/revision-history"
	// DesiredReplicasAnnotation is the desired replicas for a deployment recorded as an annotation
	// in its replica sets. Helps in separating scaling events from the rollout process and for
	// determining if the new replica set for a deployment is really saturated.
	DesiredReplicasAnnotation = "deployment.kubernetes.io/desired-replicas"
	// MaxReplicasAnnotation is the maximum replicas a deployment can have at a given point, which
	// is deployment.spec.replicas + maxSurge. Used by the underlying replica sets to estimate their
	// proportions in case the deployment has surge replicas.
	MaxReplicasAnnotation = "deployment.kubernetes.io/max-replicas"

	// RollbackRevisionNotFound is not found rollback event reason
	RollbackRevisionNotFound = "DeploymentRollbackRevisionNotFound"
	// RollbackTemplateUnchanged is the template unchanged rollback event reason
	RollbackTemplateUnchanged = "DeploymentRollbackTemplateUnchanged"
	// RollbackDone is the done rollback event reason
	RollbackDone = "DeploymentRollback"
	// OverlapAnnotation marks deployments with overlapping selector with other deployments
	// TODO: Delete this annotation when we gracefully handle overlapping selectors.
	// See https://github.com/kubernetes/kubernetes/issues/2210
	OverlapAnnotation = "deployment.kubernetes.io/error-selector-overlapping-with"
	// SelectorUpdateAnnotation marks the last time deployment selector update
	// TODO: Delete this annotation when we gracefully handle overlapping selectors.
	// See https://github.com/kubernetes/kubernetes/issues/2210
	SelectorUpdateAnnotation = "deployment.kubernetes.io/selector-updated-at"

	// Reasons for deployment conditions
	//
	// Progressing:
	//
	// ReplicaSetUpdatedReason is added in a deployment when one of its replica sets is updated as part
	// of the rollout process.
	ReplicaSetUpdatedReason = "ReplicaSetUpdated"
	// FailedRSCreateReason is added in a deployment when it cannot create a new replica set.
	FailedRSCreateReason = "ReplicaSetCreateError"
	// NewReplicaSetReason is added in a deployment when it creates a new replica set.
	NewReplicaSetReason = "NewReplicaSetCreated"
	// FoundNewRSReason is added in a deployment when it adopts an existing replica set.
	FoundNewRSReason = "FoundNewReplicaSet"
	// NewRSAvailableReason is added in a deployment when its newest replica set is made available
	// ie. the number of new pods that have passed readiness checks and run for at least minReadySeconds
	// is at least the minimum available pods that need to run for the deployment.
	NewRSAvailableReason = "NewReplicaSetAvailable"
	// TimedOutReason is added in a deployment when its newest replica set fails to show any progress
	// within the given deadline (progressDeadlineSeconds).
	TimedOutReason = "ProgressDeadlineExceeded"
	// PausedDeployReason is added in a deployment when it is paused. Lack of progress shouldn't be
	// estimated once a deployment is paused.
	PausedDeployReason = "DeploymentPaused"
	// ResumedDeployReason is added in a deployment when it is resumed. Useful for not failing accidentally
	// deployments that paused amidst a rollout and are bounded by a deadline.
	ResumedDeployReason = "DeploymentResumed"
	//
	// Available:
	//
	// MinimumReplicasAvailable is added in a deployment when it has its minimum replicas required available.
	MinimumReplicasAvailable = "MinimumReplicasAvailable"
	// MinimumReplicasUnavailable is added in a deployment when it doesn't have the minimum required replicas
	// available.
	MinimumReplicasUnavailable = "MinimumReplicasUnavailable"
)

Variables

This section is empty.

Functions

func DeploymentComplete 

func DeploymentComplete(deployment *extensions.Deployment, newStatus *extensions.DeploymentStatus) bool

DeploymentComplete considers a deployment to be complete once its desired replicas equals its updatedReplicas and it doesn't violate minimum availability.

func DeploymentDeepCopy 

func DeploymentDeepCopy(deployment *extensions.Deployment) (*extensions.Deployment, error)

func DeploymentProgressing 

func DeploymentProgressing(deployment *extensions.Deployment, newStatus *extensions.DeploymentStatus) bool

DeploymentProgressing reports progress for a deployment. Progress is estimated by comparing the current with the new status of the deployment that the controller is observing. The following algorithm is already used in the kubectl rolling updater to report lack of progress.

func DeploymentTimedOut 

func DeploymentTimedOut(deployment *extensions.Deployment, newStatus *extensions.DeploymentStatus) bool

DeploymentTimedOut considers a deployment to have timed out once its condition that reports progress is older than progressDeadlineSeconds or a Progressing condition with a TimedOutReason reason already exists.

func FindActiveOrLatest 

func FindActiveOrLatest(newRS *extensions.ReplicaSet, oldRSs []*extensions.ReplicaSet) *extensions.ReplicaSet

FindActiveOrLatest returns the only active or the latest replica set in case there is at most one active replica set. If there are more active replica sets, then we should proportionally scale them.

func FindNewReplicaSet 

func FindNewReplicaSet(deployment *extensions.Deployment, rsList []*extensions.ReplicaSet) (*extensions.ReplicaSet, error)

FindNewReplicaSet returns the new RS this given deployment targets (the one with the same pod template).

func FindOldReplicaSets 

func FindOldReplicaSets(deployment *extensions.Deployment, rsList []*extensions.ReplicaSet, podList *api.PodList) ([]*extensions.ReplicaSet, []*extensions.ReplicaSet, error)

FindOldReplicaSets returns the old replica sets targeted by the given Deployment, with the given PodList and slice of RSes. Note that the first set of old replica sets doesn't include the ones with no pods, and the second set of old replica sets include all old replica sets.

func GetActualReplicaCountForReplicaSets 

func GetActualReplicaCountForReplicaSets(replicaSets []*extensions.ReplicaSet) int32

GetActualReplicaCountForReplicaSets returns the sum of actual replicas of the given replica sets.

func GetAllReplicaSets 

func GetAllReplicaSets(deployment *extensions.Deployment, c clientset.Interface) ([]*extensions.ReplicaSet, []*extensions.ReplicaSet, *extensions.ReplicaSet, error)

GetAllReplicaSets returns the old and new replica sets targeted by the given Deployment. It gets PodList and ReplicaSetList from client interface. Note that the first set of old replica sets doesn't include the ones with no pods, and the second set of old replica sets include all old replica sets. The third returned value is the new replica set, and it may be nil if it doesn't exist yet.

func GetAvailableReplicaCountForReplicaSets 

func GetAvailableReplicaCountForReplicaSets(replicaSets []*extensions.ReplicaSet) int32

GetAvailableReplicaCountForReplicaSets returns the number of available pods corresponding to the given replica sets.

func GetDeploymentCondition 

func GetDeploymentCondition(status extensions.DeploymentStatus, condType extensions.DeploymentConditionType) *extensions.DeploymentCondition

GetDeploymentCondition returns the condition with the provided type.

func GetDesiredReplicasAnnotation 

func GetDesiredReplicasAnnotation(rs *extensions.ReplicaSet) (int32, bool)

GetDesiredReplicasAnnotation returns the number of desired replicas

func GetNewReplicaSet 

func GetNewReplicaSet(deployment *extensions.Deployment, c clientset.Interface) (*extensions.ReplicaSet, error)

GetNewReplicaSet returns a replica set that matches the intent of the given deployment; get ReplicaSetList from client interface. Returns nil if the new replica set doesn't exist yet.

func GetNewReplicaSetTemplate 

func GetNewReplicaSetTemplate(deployment *extensions.Deployment) api.PodTemplateSpec

GetNewReplicaSetTemplate returns the desired PodTemplateSpec for the new ReplicaSet corresponding to the given ReplicaSet.

func GetOldReplicaSets 

func GetOldReplicaSets(deployment *extensions.Deployment, c clientset.Interface) ([]*extensions.ReplicaSet, []*extensions.ReplicaSet, error)

GetOldReplicaSets returns the old replica sets targeted by the given Deployment; get PodList and ReplicaSetList from client interface. Note that the first set of old replica sets doesn't include the ones with no pods, and the second set of old replica sets include all old replica sets.

func GetProportion 

func GetProportion(rs *extensions.ReplicaSet, d extensions.Deployment, deploymentReplicasToAdd, deploymentReplicasAdded int32) int32

GetProportion will estimate the proportion for the provided replica set using 1. the current size of the parent deployment, 2. the replica count that needs be added on the replica sets of the deployment, and 3. the total replicas added in the replica sets of the deployment so far.

func GetReplicaCountForReplicaSets 

func GetReplicaCountForReplicaSets(replicaSets []*extensions.ReplicaSet) int32

GetReplicaCountForReplicaSets returns the sum of Replicas of the given replica sets.

func IsPodAvailable 

func IsPodAvailable(pod *api.Pod, minReadySeconds int32, now time.Time) bool

IsPodAvailable return true if the pod is available. TODO: Remove this once we start using replica set status for calculating available pods for a deployment.

func IsRollingUpdate 

func IsRollingUpdate(deployment *extensions.Deployment) bool

IsRollingUpdate returns true if the strategy type is a rolling update.

func IsSaturated 

func IsSaturated(deployment *extensions.Deployment, rs *extensions.ReplicaSet) bool

IsSaturated checks if the new replica set is saturated by comparing its size with its deployment size. Both the deployment and the replica set have to believe this replica set can own all of the desired replicas in the deployment and the annotation helps in achieving that.

func LabelPodsWithHash 

func LabelPodsWithHash(podList *api.PodList, rs *extensions.ReplicaSet, c clientset.Interface, namespace, hash string) (bool, error)

LabelPodsWithHash labels all pods in the given podList with the new hash label. The returned bool value can be used to tell if all pods are actually labeled.

func LastRevision 

func LastRevision(allRSs []*extensions.ReplicaSet) int64

LastRevision finds the second max revision number in all replica sets (the last revision)

func LastSelectorUpdate 

func LastSelectorUpdate(d *extensions.Deployment) unversioned.Time

LastSelectorUpdate returns the last time given deployment's selector is updated

func ListPods 

func ListPods(deployment *extensions.Deployment, getPodList podListFunc) (*api.PodList, error)

ListPods returns a list of pods the given deployment targets.

func ListReplicaSets 

func ListReplicaSets(deployment *extensions.Deployment, getRSList rsListFunc) ([]*extensions.ReplicaSet, error)

ListReplicaSets returns a slice of RSes the given deployment targets.

func MaxRevision 

func MaxRevision(allRSs []*extensions.ReplicaSet) int64

MaxRevision finds the highest revision in the replica sets

func MaxSurge 

func MaxSurge(deployment extensions.Deployment) int32

MaxSurge returns the maximum surge pods a rolling deployment can take.

func MaxUnavailable 

func MaxUnavailable(deployment extensions.Deployment) int32

MaxUnavailable returns the maximum unavailable pods a rolling deployment can take.

func MinAvailable 

func MinAvailable(deployment *extensions.Deployment) int32

MinAvailable returns the minimum vailable pods of a given deployment

func NewDeploymentCondition 

func NewDeploymentCondition(condType extensions.DeploymentConditionType, status api.ConditionStatus, reason, message string) *extensions.DeploymentCondition

NewDeploymentCondition creates a new deployment condition.

func NewRSNewReplicas 

func NewRSNewReplicas(deployment *extensions.Deployment, allRSs []*extensions.ReplicaSet, newRS *extensions.ReplicaSet) (int32, error)

NewRSNewReplicas calculates the number of replicas a deployment's new RS should have. When one of the followings is true, we're rolling out the deployment; otherwise, we're scaling it. 1) The new RS is saturated: newRS's replicas == deployment's replicas 2) Max number of pods allowed is reached: deployment's replicas + maxSurge == all RSs' replicas

func OverlapsWith 

func OverlapsWith(current, other *extensions.Deployment) (bool, error)

OverlapsWith returns true when two given deployments are different and overlap with each other

func RemoveDeploymentCondition 

func RemoveDeploymentCondition(status *extensions.DeploymentStatus, condType extensions.DeploymentConditionType)

RemoveDeploymentCondition removes the deployment condition with the provided type.

func ReplicaSetToDeploymentCondition 

func ReplicaSetToDeploymentCondition(cond extensions.ReplicaSetCondition) extensions.DeploymentCondition

ReplicaSetToDeploymentCondition converts a replica set condition into a deployment condition. Useful for promoting replica set failure conditions into deployments.

func ResolveFenceposts 

func ResolveFenceposts(maxSurge, maxUnavailable *intstrutil.IntOrString, desired int32) (int32, int32, error)

ResolveFenceposts resolves both maxSurge and maxUnavailable. This needs to happen in one step. For example:

2 desired, max unavailable 1%, surge 0% - should scale old(-1), then new(+1), then old(-1), then new(+1) 1 desired, max unavailable 1%, surge 0% - should scale old(-1), then new(+1) 2 desired, max unavailable 25%, surge 1% - should scale new(+1), then old(-1), then new(+1), then old(-1) 1 desired, max unavailable 25%, surge 1% - should scale new(+1), then old(-1) 2 desired, max unavailable 0%, surge 1% - should scale new(+1), then old(-1), then new(+1), then old(-1) 1 desired, max unavailable 0%, surge 1% - should scale new(+1), then old(-1)

func Revision 

func Revision(obj runtime.Object) (int64, error)

Revision returns the revision number of the input object.

func SelectorUpdatedBefore 

func SelectorUpdatedBefore(d1, d2 *extensions.Deployment) bool

SelectorUpdatedBefore returns true if the former deployment's selector is updated before the latter, false otherwise

func SetDeploymentAnnotationsTo 

func SetDeploymentAnnotationsTo(deployment *extensions.Deployment, rollbackToRS *extensions.ReplicaSet)

SetDeploymentAnnotationsTo sets deployment's annotations as given RS's annotations. This action should be done if and only if the deployment is rolling back to this rs. Note that apply and revision annotations are not changed.

func SetDeploymentCondition 

func SetDeploymentCondition(status *extensions.DeploymentStatus, condition extensions.DeploymentCondition)

SetDeploymentCondition updates the deployment to include the provided condition. If the condition that we are about to add already exists and has the same status and reason then we are not going to update.

func SetDeploymentRevision 

func SetDeploymentRevision(deployment *extensions.Deployment, revision string) bool

SetDeploymentRevision updates the revision for a deployment.

func SetFromReplicaSetTemplate 

func SetFromReplicaSetTemplate(deployment *extensions.Deployment, template api.PodTemplateSpec) *extensions.Deployment

SetFromReplicaSetTemplate sets the desired PodTemplateSpec from a replica set template to the given deployment.

func SetNewReplicaSetAnnotations 

func SetNewReplicaSetAnnotations(deployment *extensions.Deployment, newRS *extensions.ReplicaSet, newRevision string, exists bool) bool

SetNewReplicaSetAnnotations sets new replica set's annotations appropriately by updating its revision and copying required deployment annotations to it; it returns true if replica set's annotation is changed.

func SetReplicasAnnotations 

func SetReplicasAnnotations(rs *extensions.ReplicaSet, desiredReplicas, maxReplicas int32) bool

SetReplicasAnnotations sets the desiredReplicas and maxReplicas into the annotations

func WaitForObservedDeployment 

func WaitForObservedDeployment(getDeploymentFunc func() (*extensions.Deployment, error), desiredGeneration int64, interval, timeout time.Duration) error

WaitForObservedDeployment polls for deployment to be updated so that deployment.Status.ObservedGeneration >= desiredGeneration. Returns error if polling timesout.

func WaitForPodsHashPopulated 

func WaitForPodsHashPopulated(c clientset.Interface, desiredGeneration int64, namespace, name string) error

WaitForPodsHashPopulated polls the replica set until updated and fully labeled.

func WaitForReplicaSetUpdated 

func WaitForReplicaSetUpdated(c clientset.Interface, desiredGeneration int64, namespace, name string) error

WaitForReplicaSetUpdated polls the replica set until it is updated.

Types

type BySelectorLastUpdateTime 

type BySelectorLastUpdateTime []*extensions.Deployment

BySelectorLastUpdateTime sorts a list of deployments by the last update time of their selector, first using their creation timestamp and then their names as a tie breaker.

func (BySelectorLastUpdateTime) Len 

func (o BySelectorLastUpdateTime) Len() int

func (BySelectorLastUpdateTime) Less 

func (o BySelectorLastUpdateTime) Less(i, j int) bool

func (BySelectorLastUpdateTime) Swap 

func (o BySelectorLastUpdateTime) Swap(i, j int)

Source Files

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