kube

package
Version: v0.5.5 Latest Latest
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Published: Oct 9, 2021 License: Apache-2.0 Imports: 45 Imported by: 0

Documentation

Overview

Package kube provides helper utilities common for kubernetes

Index

Constants

View Source
const (
	SecretKind                   = "Secret"
	ServiceKind                  = "Service"
	ServiceAccountKind           = "ServiceAccount"
	EndpointsKind                = "Endpoints"
	DeploymentKind               = "Deployment"
	ReplicaSetKind               = "ReplicaSet"
	StatefulSetKind              = "StatefulSet"
	DaemonSetKind                = "DaemonSet"
	IngressKind                  = "Ingress"
	JobKind                      = "Job"
	PersistentVolumeClaimKind    = "PersistentVolumeClaim"
	CustomResourceDefinitionKind = "CustomResourceDefinition"
	PodKind                      = "Pod"
	APIServiceKind               = "APIService"
	NamespaceKind                = "Namespace"
	HorizontalPodAutoscalerKind  = "HorizontalPodAutoscaler"
)

Variables

This section is empty.

Functions

func GetAppInstanceLabel

func GetAppInstanceLabel(un *unstructured.Unstructured, key string) string

GetAppInstanceLabel returns the application instance name from labels

func GetDeploymentReplicas

func GetDeploymentReplicas(u *unstructured.Unstructured) *int64

func IsCRD

func IsCRD(obj *unstructured.Unstructured) bool

func IsCRDGroupVersionKind

func IsCRDGroupVersionKind(gvk schema.GroupVersionKind) bool

func IsNamespacedOrUnknown

func IsNamespacedOrUnknown(provider ResourceInfoProvider, gk schema.GroupKind) bool

func MustToUnstructured

func MustToUnstructured(obj interface{}) *unstructured.Unstructured

MustToUnstructured converts a concrete K8s API type to a un unstructured object and panics if not successful

func NewKubeConfig

func NewKubeConfig(restConfig *rest.Config, namespace string) *clientcmdapi.Config

NewKubeConfig converts a clientcmdapi.Config (kubeconfig) from a rest.Config

func RetryUntilSucceed

func RetryUntilSucceed(ctx context.Context, interval time.Duration, desc string, log logr.Logger, action func() error)

RetryUntilSucceed keep retrying given action with specified interval until action succeed or specified context is done.

func RunAllAsync

func RunAllAsync(count int, action func(i int) error) error

func SplitYAML

func SplitYAML(yamlData []byte) ([]*unstructured.Unstructured, error)

SplitYAML splits a YAML file into unstructured objects. Returns list of all unstructured objects found in the yaml. If an error occurs, returns objects that have been parsed so far too.

func TestConfig

func TestConfig(config *rest.Config) error

TestConfig tests to make sure the REST config is usable

func ToGroupVersionResource

func ToGroupVersionResource(groupVersion string, apiResource *metav1.APIResource) schema.GroupVersionResource

func ToResourceInterface

func ToResourceInterface(dynamicIf dynamic.Interface, apiResource *metav1.APIResource, resource schema.GroupVersionResource, namespace string) dynamic.ResourceInterface

func ToUnstructured

func ToUnstructured(obj interface{}) (*unstructured.Unstructured, error)

ToUnstructured converts a concrete K8s API type to a un unstructured object

func UnsetLabel

func UnsetLabel(target *unstructured.Unstructured, key string)

UnsetLabel removes our app labels from an unstructured object

func WatchWithRetry

func WatchWithRetry(ctx context.Context, getWatch func() (watch.Interface, error)) chan struct {
	*watch.Event
	Error error
}

WatchWithRetry returns channel of watch events or errors of failed to call watch API.

func WriteKubeConfig

func WriteKubeConfig(restConfig *rest.Config, namespace, filename string) error

WriteKubeConfig takes a rest.Config and writes it as a kubeconfig at the specified path

Types

type APIResourceInfo

type APIResourceInfo struct {
	GroupKind            schema.GroupKind
	Meta                 metav1.APIResource
	GroupVersionResource schema.GroupVersionResource
}

type CleanupFunc

type CleanupFunc func()

type Kubectl

type Kubectl interface {
	ManageResources(config *rest.Config, openAPISchema openapi.Resources) (ResourceOperations, func(), error)
	LoadOpenAPISchema(config *rest.Config) (openapi.Resources, error)
	ConvertToVersion(obj *unstructured.Unstructured, group, version string) (*unstructured.Unstructured, error)
	DeleteResource(ctx context.Context, config *rest.Config, gvk schema.GroupVersionKind, name string, namespace string, deleteOptions metav1.DeleteOptions) error
	GetResource(ctx context.Context, config *rest.Config, gvk schema.GroupVersionKind, name string, namespace string) (*unstructured.Unstructured, error)
	PatchResource(ctx context.Context, config *rest.Config, gvk schema.GroupVersionKind, name string, namespace string, patchType types.PatchType, patchBytes []byte, subresources ...string) (*unstructured.Unstructured, error)
	GetAPIResources(config *rest.Config, resourceFilter ResourceFilter) ([]APIResourceInfo, error)
	GetAPIGroups(config *rest.Config) ([]metav1.APIGroup, error)
	GetServerVersion(config *rest.Config) (string, error)
	NewDynamicClient(config *rest.Config) (dynamic.Interface, error)
	SetOnKubectlRun(onKubectlRun OnKubectlRunFunc)
}

type KubectlCmd

type KubectlCmd struct {
	Log          logr.Logger
	Tracer       tracing.Tracer
	OnKubectlRun OnKubectlRunFunc
}

func (*KubectlCmd) ConvertToVersion

func (k *KubectlCmd) ConvertToVersion(obj *unstructured.Unstructured, group string, version string) (*unstructured.Unstructured, error)

ConvertToVersion converts an unstructured object into the specified group/version

func (*KubectlCmd) DeleteResource

func (k *KubectlCmd) DeleteResource(ctx context.Context, config *rest.Config, gvk schema.GroupVersionKind, name string, namespace string, deleteOptions metav1.DeleteOptions) error

DeleteResource deletes resource

func (*KubectlCmd) GetAPIGroups

func (k *KubectlCmd) GetAPIGroups(config *rest.Config) ([]metav1.APIGroup, error)

func (*KubectlCmd) GetAPIResources

func (k *KubectlCmd) GetAPIResources(config *rest.Config, resourceFilter ResourceFilter) ([]APIResourceInfo, error)

func (*KubectlCmd) GetResource

func (k *KubectlCmd) GetResource(ctx context.Context, config *rest.Config, gvk schema.GroupVersionKind, name string, namespace string) (*unstructured.Unstructured, error)

GetResource returns resource

func (*KubectlCmd) GetServerVersion

func (k *KubectlCmd) GetServerVersion(config *rest.Config) (string, error)

func (*KubectlCmd) LoadOpenAPISchema

func (k *KubectlCmd) LoadOpenAPISchema(config *rest.Config) (openapi.Resources, error)

func (*KubectlCmd) ManageResources

func (k *KubectlCmd) ManageResources(config *rest.Config, openAPISchema openapi.Resources) (ResourceOperations, func(), error)

func (*KubectlCmd) NewDynamicClient

func (k *KubectlCmd) NewDynamicClient(config *rest.Config) (dynamic.Interface, error)

func (*KubectlCmd) PatchResource

func (k *KubectlCmd) PatchResource(ctx context.Context, config *rest.Config, gvk schema.GroupVersionKind, name string, namespace string, patchType types.PatchType, patchBytes []byte, subresources ...string) (*unstructured.Unstructured, error)

PatchResource patches resource

func (*KubectlCmd) SetOnKubectlRun

func (k *KubectlCmd) SetOnKubectlRun(onKubectlRun OnKubectlRunFunc)

type OnKubectlRunFunc

type OnKubectlRunFunc func(command string) (CleanupFunc, error)

type ResourceFilter

type ResourceFilter interface {
	IsExcludedResource(group, kind, cluster string) bool
	IsExcludedObject(un *unstructured.Unstructured) bool
}

type ResourceInfoProvider

type ResourceInfoProvider interface {
	IsNamespaced(gk schema.GroupKind) (bool, error)
}

type ResourceKey

type ResourceKey struct {
	Group     string
	Kind      string
	Namespace string
	Name      string
}

func GetResourceKey

func GetResourceKey(obj *unstructured.Unstructured) ResourceKey

func NewResourceKey

func NewResourceKey(group string, kind string, namespace string, name string) ResourceKey

func (ResourceKey) GroupKind

func (k ResourceKey) GroupKind() schema.GroupKind

func (*ResourceKey) String

func (k *ResourceKey) String() string

type ResourceOperations

type ResourceOperations interface {
	ApplyResource(ctx context.Context, obj *unstructured.Unstructured, dryRunStrategy cmdutil.DryRunStrategy, force, validate bool) (string, error)
	ReplaceResource(ctx context.Context, obj *unstructured.Unstructured, dryRunStrategy cmdutil.DryRunStrategy, force bool) (string, error)
	CreateResource(ctx context.Context, obj *unstructured.Unstructured, dryRunStrategy cmdutil.DryRunStrategy, validate bool) (string, error)
	UpdateResource(ctx context.Context, obj *unstructured.Unstructured, dryRunStrategy cmdutil.DryRunStrategy) (*unstructured.Unstructured, error)
}

ResourceOperations provides methods to manage k8s resources

Directories

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