util

package
v0.3.15 Latest Latest
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 Go to latest Published: Mar 30, 2021 License: Apache-2.0 Imports: 36 Imported by: 272

Documentation

Index

Constants

View Source 
const (
	// CharSet defines the alphanumeric set for random string generation
	CharSet = "0123456789abcdefghijklmnopqrstuvwxyz"
	// MachineListFormatDeprecationMessage notifies the user that the old
	// MachineList format is no longer supported
	MachineListFormatDeprecationMessage = "Your MachineList items must include Kind and APIVersion"
)

Variables

View Source 
var (
	ErrNoCluster                 = fmt.Errorf("no %q label present", clusterv1.ClusterLabelName)
	ErrUnstructuredFieldNotFound = fmt.Errorf("field not found")
)
View Source 
var (
	// IsPaused returns true if the Cluster is paused or the object has the `paused` annotation.
	// Deprecated: use util/annotations/IsPaused instead
	IsPaused = annotations.IsPaused

	// HasPausedAnnotation returns true if the object has the `paused` annotation.
	// Deprecated: use util/annotations/HasPausedAnnotation instead
	HasPausedAnnotation = annotations.HasPausedAnnotation
)

Functions

func ClusterToInfrastructureMapFunc 

func ClusterToInfrastructureMapFunc(gvk schema.GroupVersionKind) handler.ToRequestsFunc

ClusterToInfrastructureMapFunc returns a handler.ToRequestsFunc that watches for Cluster events and returns reconciliation requests for an infrastructure provider object.

func ClusterToObjectsMapper added in v0.3.3 

func ClusterToObjectsMapper(c client.Client, ro runtime.Object, scheme *runtime.Scheme) (handler.Mapper, error)

ClusterToObjectsMapper returns a mapper function that gets a cluster and lists all objects for the object passed in and returns a list of requests. NB: The objects are required to have `clusterv1.ClusterLabelName` applied.

func DelegatingClientFuncWithUncached added in v0.3.12 

func DelegatingClientFuncWithUncached(uncachedObjects ...runtime.Object) func(cache cache.Cache, config *rest.Config, options client.Options) (client.Client, error)

DelegatingClientFuncWithUncached returns a manager.NewClientFunc to be used when creating a new controller runtime manager.

A delegating client reads from the cache and writes directly to the server. This avoids getting unstructured objects directly from the server.

In addition, this function builds a custom reader that used the input list of objects to determine which GVK should always query the live server, instead of going through a cache.

func EnsureOwnerRef 

func EnsureOwnerRef(ownerReferences []metav1.OwnerReference, ref metav1.OwnerReference) []metav1.OwnerReference

EnsureOwnerRef makes sure the slice contains the OwnerReference.

func GetCRDMetadataFromGVK added in v0.3.10 

func GetCRDMetadataFromGVK(ctx context.Context, restConfig *rest.Config, gvk schema.GroupVersionKind) (*metav1.PartialObjectMetadata, error)

GetCRDMetadataFromGVK retrieves a CustomResourceDefinition metadata from the API server using client-go's metadata only client.

This function is greatly more efficient than GetCRDWithContract and should be preferred in most cases.

func GetCRDWithContract added in v0.3.0 

func GetCRDWithContract(ctx context.Context, c client.Client, gvk schema.GroupVersionKind, contract string) (*apiextensionsv1.CustomResourceDefinition, error)

GetCRDWithContract retrieves a list of CustomResourceDefinitions from using controller-runtime Client, filtering with the `contract` label passed in. Returns the first CRD in the list that matches the GroupVersionKind, otherwise returns an error.

func GetClusterByName 

func GetClusterByName(ctx context.Context, c client.Client, namespace, name string) (*clusterv1.Cluster, error)

GetClusterByName finds and return a Cluster object using the specified params.

func GetClusterFromMetadata 

func GetClusterFromMetadata(ctx context.Context, c client.Client, obj metav1.ObjectMeta) (*clusterv1.Cluster, error)

GetClusterFromMetadata returns the Cluster object (if present) using the object metadata.

func GetControlPlaneMachines 

func GetControlPlaneMachines(machines []*clusterv1.Machine) (res []*clusterv1.Machine)

GetControlPlaneMachines returns a slice containing control plane machines.

func GetControlPlaneMachinesFromList 

func GetControlPlaneMachinesFromList(machineList *clusterv1.MachineList) (res []*clusterv1.Machine)

GetControlPlaneMachinesFromList returns a slice containing control plane machines.

func GetMachineByName 

func GetMachineByName(ctx context.Context, c client.Client, namespace, name string) (*clusterv1.Machine, error)

GetMachineByName finds and return a Machine object using the specified params.

func GetMachineIfExists 

func GetMachineIfExists(c client.Client, namespace, name string) (*clusterv1.Machine, error)

GetMachineIfExists gets a machine from the API server if it exists.

func GetMachinesForCluster added in v0.3.0 

func GetMachinesForCluster(ctx context.Context, c client.Client, cluster *clusterv1.Cluster) (*clusterv1.MachineList, error)

GetMachinesForCluster returns a list of machines associated with the cluster.

func GetOwnerCluster 

func GetOwnerCluster(ctx context.Context, c client.Client, obj metav1.ObjectMeta) (*clusterv1.Cluster, error)

GetOwnerCluster returns the Cluster object owning the current resource.

func GetOwnerMachine 

func GetOwnerMachine(ctx context.Context, c client.Client, obj metav1.ObjectMeta) (*clusterv1.Machine, error)

GetOwnerMachine returns the Machine object owning the current resource.

func HasOwner 

func HasOwner(refList []metav1.OwnerReference, apiVersion string, kinds []string) bool

HasOwner checks if any of the references in the passed list match the given group from apiVersion and one of the given kinds.

func HasOwnerRef 

func HasOwnerRef(ownerReferences []metav1.OwnerReference, ref metav1.OwnerReference) bool

HasOwnerRef returns true if the OwnerReference is already in the slice.

func ImageTagIsValid added in v0.3.1 

func ImageTagIsValid(tagName string) bool

ImageTagIsValid ensures that a given image tag is compliant with the OCI spec Deprecated: Please use the functions in util/container

func IsControlPlaneMachine 

func IsControlPlaneMachine(machine *clusterv1.Machine) bool

IsControlPlaneMachine checks machine is a control plane node.

func IsControlledBy added in v0.3.7 

func IsControlledBy(obj metav1.Object, owner controllerutil.Object) bool

IsControlledBy differs from metav1.IsControlledBy in that it checks the group (but not version), kind, and name vs uid.

func IsExternalManagedControlPlane added in v0.3.10 

func IsExternalManagedControlPlane(controlPlane *unstructured.Unstructured) bool

IsExternalManagedControlPlane returns a bool indicating whether the control plane referenced in the passed Unstructured resource is an externally managed control plane such as AKS, EKS, GKE, etc.

func IsNodeReady 

func IsNodeReady(node *v1.Node) bool

IsNodeReady returns true if a node is ready.

func IsOwnedByObject added in v0.3.7 

func IsOwnedByObject(obj metav1.Object, target controllerutil.Object) bool

IsOwnedByObject returns true if any of the owner references point to the given target.

func IsSupportedVersionSkew added in v0.3.7 

func IsSupportedVersionSkew(a, b semver.Version) bool

IsSupportedVersionSkew will return true if a and b are no more than one minor version off from each other.

func LowestNonZeroResult added in v0.3.9 

func LowestNonZeroResult(i, j ctrl.Result) ctrl.Result

LowestNonZeroResult compares two reconciliation results and returns the one with lowest requeue time.

func MachineToInfrastructureMapFunc 

func MachineToInfrastructureMapFunc(gvk schema.GroupVersionKind) handler.ToRequestsFunc

MachineToInfrastructureMapFunc returns a handler.ToRequestsFunc that watches for Machine events and returns reconciliation requests for an infrastructure provider object.

func ManagerDelegatingClientFunc added in v0.3.7 

func ManagerDelegatingClientFunc(cache cache.Cache, config *rest.Config, options client.Options) (client.Client, error)

ManagerDelegatingClientFunc is a manager.NewClientFunc to be used when creating a new controller runtime manager.

A delegating client reads from the cache and writes directly to the server. This avoids getting unstructured objects directly from the server

See issue: https://github.com/kubernetes-sigs/cluster-api/issues/1663

func ModifyImageRepository added in v0.3.3 

func ModifyImageRepository(imageName, repositoryName string) (string, error)

ModifyImageRepository takes an imageName (e.g., repository/image:tag), and returns an image name with updated repository Deprecated: Please use the functions in util/container

func ModifyImageTag added in v0.3.0 

func ModifyImageTag(imageName, tagName string) (string, error)

ModifyImageTag takes an imageName (e.g., repository/image:tag), and returns an image name with updated tag Deprecated: Please use the functions in util/container

func ObjectKey added in v0.3.0 

func ObjectKey(object metav1.Object) client.ObjectKey

ObjectKey returns client.ObjectKey for the object.

func ObjectReferenceToUnstructured added in v0.3.7 

func ObjectReferenceToUnstructured(in corev1.ObjectReference) *unstructured.Unstructured

ObjectReferenceToUnstructured converts an object reference to an unstructured object.

func Ordinalize added in v0.3.3 

func Ordinalize(n int) string

Ordinalize takes an int and returns the ordinalized version of it. Eg. 1 --> 1st, 103 --> 103rd

func ParseMajorMinorPatch added in v0.3.2 

func ParseMajorMinorPatch(version string) (semver.Version, error)

ParseMajorMinorPatch returns a semver.Version from the string provided by looking only at major.minor.patch and stripping everything else out.

func PointsTo 

func PointsTo(refs []metav1.OwnerReference, target *metav1.ObjectMeta) bool

PointsTo returns true if any of the owner references point to the given target Deprecated: Use IsOwnedByObject to cover differences in API version or backup/restore that changed UIDs.

func Poll 

func Poll(interval, timeout time.Duration, condition wait.ConditionFunc) error

func PollImmediate 

func PollImmediate(interval, timeout time.Duration, condition wait.ConditionFunc) error

func RandomString 

func RandomString(n int) string

RandomString returns a random alphanumeric string.

func RemoveOwnerRef added in v0.3.7 

func RemoveOwnerRef(ownerReferences []metav1.OwnerReference, inputRef metav1.OwnerReference) []metav1.OwnerReference

RemoveOwnerRef returns the slice of owner references after removing the supplied owner ref

func ReplaceOwnerRef added in v0.3.7 

func ReplaceOwnerRef(ownerReferences []metav1.OwnerReference, source metav1.Object, target metav1.OwnerReference) []metav1.OwnerReference

ReplaceOwnerRef re-parents an object from one OwnerReference to another It compares strictly based on UID to avoid reparenting across an intentional deletion: if an object is deleted and re-created with the same name and namespace, the only way to tell there was an in-progress deletion is by comparing the UIDs.

func Retry 

func Retry(fn wait.ConditionFunc, initialBackoffSec int) error

func SemverToOCIImageTag added in v0.3.1 

func SemverToOCIImageTag(version string) string

SemverToOCIImageTag is a helper function that replaces all non-allowed symbols in tag strings with underscores. Image tag can only contain lowercase and uppercase letters, digits, underscores, periods and dashes. Current usage is for CI images where all of symbols except '+' are valid, but function is for generic usage where input can't be always pre-validated. Taken from k8s.io/cmd/kubeadm/app/util Deprecated: Please use the functions in util/container

func UnstructuredUnmarshalField 

func UnstructuredUnmarshalField(obj *unstructured.Unstructured, v interface{}, fields ...string) error

UnstructuredUnmarshalField is a wrapper around json and unstructured objects to decode and copy a specific field value into an object.

func WatchOnClusterPaused added in v0.3.3 

func WatchOnClusterPaused(c controller.Controller, mapFunc handler.Mapper) error

WatchOnClusterPaused adds a conditional watch to the controlled given as input that sends watch notifications on any create or delete, and only updates that toggle Cluster.Spec.Cluster. Deprecated: Instead add the Watch directly and use predicates.ClusterUnpaused or predicates.ClusterUnpausedAndInfrastructureReady depending on your use case.

Types

type KubeAwareAPIVersions added in v0.3.0 

type KubeAwareAPIVersions []string

KubeAwareAPIVersions is a sortable slice of kube-like version strings.

Kube-like version strings are starting with a v, followed by a major version, optional "alpha" or "beta" strings followed by a minor version (e.g. v1, v2beta1). Versions will be sorted based on GA/alpha/beta first and then major and minor versions. e.g. v2, v1, v1beta2, v1beta1, v1alpha1.

func (KubeAwareAPIVersions) Len added in v0.3.0 

func (k KubeAwareAPIVersions) Len() int

func (KubeAwareAPIVersions) Less added in v0.3.0 

func (k KubeAwareAPIVersions) Less(i, j int) bool

func (KubeAwareAPIVersions) Swap added in v0.3.0 

func (k KubeAwareAPIVersions) Swap(i, j int)

type MachinesByCreationTimestamp added in v0.3.0 

type MachinesByCreationTimestamp []*clusterv1.Machine

MachinesByCreationTimestamp sorts a list of Machine by creation timestamp, using their names as a tie breaker.

func (MachinesByCreationTimestamp) Len added in v0.3.0 

func (o MachinesByCreationTimestamp) Len() int

func (MachinesByCreationTimestamp) Less added in v0.3.0 

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

func (MachinesByCreationTimestamp) Swap added in v0.3.0 

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

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