mdutil

package
v1.7.1 Latest Latest
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 Go to latest Published: Apr 23, 2024 License: Apache-2.0 Imports: 18 Imported by: 0

Documentation

Overview

Package mdutil implements MachineDeployment utilities meant to be consumed internally by the controller.

Package mdutil implements MachineDeployment utilities.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func CloneAndAddLabel 

func CloneAndAddLabel(labels map[string]string, labelKey, labelValue string) map[string]string

CloneAndAddLabel clones the given map and returns a new map with the given key and value added. Returns the given map, if labelKey is empty.

func CloneSelectorAndAddLabel 

func CloneSelectorAndAddLabel(selector *metav1.LabelSelector, labelKey, labelValue string) *metav1.LabelSelector

CloneSelectorAndAddLabel clones the given selector and returns a new selector with the given key and value added. Returns the given selector, if labelKey is empty.

func ComputeMachineSetAnnotations added in v1.4.0 

func ComputeMachineSetAnnotations(ctx context.Context, deployment *clusterv1.MachineDeployment, oldMSs []*clusterv1.MachineSet, newMS *clusterv1.MachineSet) (map[string]string, error)

ComputeMachineSetAnnotations computes the annotations that should be set on the MachineSet. Note: The passed in newMS is nil if the new MachineSet doesn't exist in the apiserver yet.

func DeploymentComplete 

func DeploymentComplete(deployment *clusterv1.MachineDeployment, newStatus *clusterv1.MachineDeploymentStatus) bool

DeploymentComplete considers a deployment to be complete once all of its desired replicas are updated and available, and no old machines are running.

func EqualMachineTemplate 

func EqualMachineTemplate(template1, template2 *clusterv1.MachineTemplateSpec) bool

EqualMachineTemplate returns true if two given machineTemplateSpec are equal, ignoring all the in-place propagated fields, and the version from external references.

func FilterActiveMachineSets 

func FilterActiveMachineSets(machineSets []*clusterv1.MachineSet) []*clusterv1.MachineSet

FilterActiveMachineSets returns machine sets that have (or at least ought to have) machines.

func FilterMachineSets 

func FilterMachineSets(mSes []*clusterv1.MachineSet, filterFn filterMS) []*clusterv1.MachineSet

FilterMachineSets returns machine sets that are filtered by filterFn (all returned ones should match filterFn).

func FindNewMachineSet 

func FindNewMachineSet(deployment *clusterv1.MachineDeployment, msList []*clusterv1.MachineSet, reconciliationTime *metav1.Time) *clusterv1.MachineSet

FindNewMachineSet returns the new MS this given deployment targets (the one with the same machine template, ignoring in-place mutable fields). Note: If the reconciliation time is after the deployment's `rolloutAfter` time, a MS has to be newer than `rolloutAfter` to be considered as matching the deployment's intent. NOTE: If we find a matching MachineSet which only differs in in-place mutable fields we can use it to fulfill the intent of the MachineDeployment by just updating the MachineSet to propagate in-place mutable fields. Thus we don't have to create a new MachineSet and we can avoid an unnecessary rollout. NOTE: Even after we changed EqualMachineTemplate to ignore fields that are propagated in-place we can guarantee that if there exists a "new machineset" using the old logic then a new machineset will definitely exist using the new logic. The new logic is looser. Therefore, we will not face a case where there exists a machine set matching the old logic but there does not exist a machineset matching the new logic. In fact previously not matching MS can now start matching the target. Since there could be multiple matches, lets choose the MS with the most replicas so that there is minimum machine churn.

func FindOldMachineSets 

func FindOldMachineSets(deployment *clusterv1.MachineDeployment, msList []*clusterv1.MachineSet, reconciliationTime *metav1.Time) []*clusterv1.MachineSet

FindOldMachineSets returns the old machine sets targeted by the given Deployment, within the given slice of MSes. Returns a list of machine sets which contains all old machine sets.

func FindOneActiveOrLatest 

func FindOneActiveOrLatest(newMS *clusterv1.MachineSet, oldMSs []*clusterv1.MachineSet) *clusterv1.MachineSet

FindOneActiveOrLatest returns the only active or the latest machine set in case there is at most one active machine set. If there are more than one active machine sets, return nil so machine sets can be scaled down to the point where there is only one active machine set.

func GetActualReplicaCountForMachineSets 

func GetActualReplicaCountForMachineSets(machineSets []*clusterv1.MachineSet) int32

GetActualReplicaCountForMachineSets returns the sum of actual replicas of the given machine sets.

func GetAvailableReplicaCountForMachineSets 

func GetAvailableReplicaCountForMachineSets(machineSets []*clusterv1.MachineSet) int32

GetAvailableReplicaCountForMachineSets returns the number of available machines corresponding to the given machine sets.

func GetDeletingMachineCount 

func GetDeletingMachineCount(machineList *clusterv1.MachineList) int32

GetDeletingMachineCount gets the number of machines that are in the process of being deleted in a machineList.

func GetProportion 

func GetProportion(ms *clusterv1.MachineSet, md clusterv1.MachineDeployment, deploymentReplicasToAdd, deploymentReplicasAdded int32, logger logr.Logger) int32

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

func GetReadyReplicaCountForMachineSets 

func GetReadyReplicaCountForMachineSets(machineSets []*clusterv1.MachineSet) int32

GetReadyReplicaCountForMachineSets returns the number of ready machines corresponding to the given machine sets.

func GetReplicaCountForMachineSets 

func GetReplicaCountForMachineSets(machineSets []*clusterv1.MachineSet) int32

GetReplicaCountForMachineSets returns the sum of Replicas of the given machine sets.

func IsRollingUpdate 

func IsRollingUpdate(deployment *clusterv1.MachineDeployment) bool

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

func IsSaturated 

func IsSaturated(deployment *clusterv1.MachineDeployment, ms *clusterv1.MachineSet) bool

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

func MachineTemplateDeepCopyRolloutFields added in v1.4.0 

func MachineTemplateDeepCopyRolloutFields(template *clusterv1.MachineTemplateSpec) *clusterv1.MachineTemplateSpec

MachineTemplateDeepCopyRolloutFields copies a MachineTemplateSpec and sets all fields that should be propagated in-place to nil and drops version from external references.

func MaxRevision 

func MaxRevision(ctx context.Context, allMSs []*clusterv1.MachineSet) int64

MaxRevision finds the highest revision in the machine sets.

func MaxSurge 

func MaxSurge(deployment clusterv1.MachineDeployment) int32

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

func MaxUnavailable 

func MaxUnavailable(deployment clusterv1.MachineDeployment) int32

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

func NewMSNewReplicas 

func NewMSNewReplicas(deployment *clusterv1.MachineDeployment, allMSs []*clusterv1.MachineSet, newMSReplicas int32) (int32, error)

NewMSNewReplicas calculates the number of replicas a deployment's new MS should have. When one of the following is true, we're rolling out the deployment; otherwise, we're scaling it. 1) The new MS is saturated: newMS's replicas == deployment's replicas 2) For RollingUpdateStrategy: Max number of machines allowed is reached: deployment's replicas + maxSurge == all MSs' replicas. 3) For OnDeleteStrategy: Max number of machines allowed is reached: deployment's replicas == all MSs' replicas.

func ReplicasAnnotationsNeedUpdate 

func ReplicasAnnotationsNeedUpdate(ms *clusterv1.MachineSet, desiredReplicas, maxReplicas int32) bool

ReplicasAnnotationsNeedUpdate return true if the replicas annotation needs to be updated.

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 SetDeploymentRevision 

func SetDeploymentRevision(deployment *clusterv1.MachineDeployment, revision string) bool

SetDeploymentRevision updates the revision for a deployment.

func SetReplicasAnnotations 

func SetReplicasAnnotations(ms *clusterv1.MachineSet, desiredReplicas, maxReplicas int32) bool

SetReplicasAnnotations sets the desiredReplicas and maxReplicas into the annotations.

func TotalMachineSetsReplicaSum 

func TotalMachineSetsReplicaSum(machineSets []*clusterv1.MachineSet) int32

TotalMachineSetsReplicaSum returns sum of max(ms.Spec.Replicas, ms.Status.Replicas) across all the machine sets.

This is used to guarantee that the total number of machines will not exceed md.Spec.Replicas + maxSurge. Use max(spec.Replicas,status.Replicas) to cover the cases that: 1. Scale up, where spec.Replicas increased but no machine created yet, so spec.Replicas > status.Replicas 2. Scale down, where spec.Replicas decreased but machine not deleted yet, so spec.Replicas < status.Replicas.

Types

type MachineSetsByCreationTimestamp 

type MachineSetsByCreationTimestamp []*clusterv1.MachineSet

MachineSetsByCreationTimestamp sorts a list of MachineSet by creation timestamp, using their names as a tie breaker.

func (MachineSetsByCreationTimestamp) Len 

func (o MachineSetsByCreationTimestamp) Len() int

func (MachineSetsByCreationTimestamp) Less 

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

func (MachineSetsByCreationTimestamp) Swap 

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

type MachineSetsByDecreasingReplicas added in v1.4.0 

type MachineSetsByDecreasingReplicas []*clusterv1.MachineSet

MachineSetsByDecreasingReplicas sorts the list of MachineSets in decreasing order of replicas, using creation time (ascending order) and name (alphabetical) as tie breakers.

func (MachineSetsByDecreasingReplicas) Len added in v1.4.0 

func (o MachineSetsByDecreasingReplicas) Len() int

func (MachineSetsByDecreasingReplicas) Less added in v1.4.0 

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

func (MachineSetsByDecreasingReplicas) Swap added in v1.4.0 

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

type MachineSetsBySizeNewer 

type MachineSetsBySizeNewer []*clusterv1.MachineSet

MachineSetsBySizeNewer sorts a list of MachineSet by size in descending order, using their creation timestamp or name as a tie breaker. By using the creation timestamp, this sorts from new to old machine sets.

func (MachineSetsBySizeNewer) Len 

func (o MachineSetsBySizeNewer) Len() int

func (MachineSetsBySizeNewer) Less 

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

func (MachineSetsBySizeNewer) Swap 

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

type MachineSetsBySizeOlder 

type MachineSetsBySizeOlder []*clusterv1.MachineSet

MachineSetsBySizeOlder sorts a list of MachineSet by size in descending order, using their creation timestamp or name as a tie breaker. By using the creation timestamp, this sorts from old to new machine sets.

func (MachineSetsBySizeOlder) Len 

func (o MachineSetsBySizeOlder) Len() int

func (MachineSetsBySizeOlder) Less 

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

func (MachineSetsBySizeOlder) Swap 

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

Source Files

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