k8s

package
v0.12.6 Latest Latest
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 Go to latest Published: Jun 25, 2021 License: Apache-2.0 Imports: 37 Imported by: 0

Documentation

Index

Examples

Constants

View Source 
const KindKey contextutils.Key = "kind"

Variables

This section is empty.

Functions

func IsK8sObjectNotExists 

func IsK8sObjectNotExists(err error) bool

Types

type PluginManager 

type PluginManager struct {
	// contains filtered or unexported fields
}

A generic Plugin for managing k8s-resources. Plugin writers wishing to use K8s resource can use the simplified api specified in pluginmachinery.core

func NewPluginManager 

func NewPluginManager(ctx context.Context, iCtx pluginsCore.SetupContext, entry k8s.PluginEntry,
	monitorIndex *ResourceMonitorIndex) (*PluginManager, error)

Creates a K8s generic task executor. This provides an easier way to build task executors that create K8s resources.

Example 
sCtx := &pluginsCoreMock.SetupContext{}
fakeKubeClient := mocks.NewFakeKubeClient()
sCtx.On("KubeClient").Return(fakeKubeClient)
sCtx.On("OwnerKind").Return("test")
sCtx.On("EnqueueOwner").Return(pluginsCore.EnqueueOwner(func(name k8stypes.NamespacedName) error { return nil }))
sCtx.On("MetricsScope").Return(promutils.NewTestScope())
ctx := context.TODO()
exec, err := NewPluginManager(ctx, sCtx, k8s.PluginEntry{
	ID:                  "SampleHandler",
	RegisteredTaskTypes: []pluginsCore.TaskType{"container"},
	ResourceToWatch:     &v1.Pod{},
	Plugin:              k8sSampleHandler{},
}, NewResourceMonitorIndex())
if err == nil {
	fmt.Printf("Created executor: %v\n", exec.GetID())
} else {
	fmt.Printf("Error in creating executor: %s\n", err.Error())
}

Output:

Created executor: SampleHandler

func NewPluginManagerWithBackOff added in v0.1.21 

func NewPluginManagerWithBackOff(ctx context.Context, iCtx pluginsCore.SetupContext, entry k8s.PluginEntry, backOffController *backoff.Controller,
	monitorIndex *ResourceMonitorIndex) (*PluginManager, error)

func (PluginManager) Abort 

func (e PluginManager) Abort(ctx context.Context, tCtx pluginsCore.TaskExecutionContext) error

func (*PluginManager) AddObjectMetadata added in v0.7.7 

func (e *PluginManager) AddObjectMetadata(taskCtx pluginsCore.TaskExecutionMetadata, o client.Object, cfg *config.K8sPluginConfig)

func (*PluginManager) CheckResourcePhase 

func (e *PluginManager) CheckResourcePhase(ctx context.Context, tCtx pluginsCore.TaskExecutionContext) (pluginsCore.Transition, error)

func (*PluginManager) ClearFinalizers 

func (e *PluginManager) ClearFinalizers(ctx context.Context, o client.Object) error

func (*PluginManager) Finalize 

func (e *PluginManager) Finalize(ctx context.Context, tCtx pluginsCore.TaskExecutionContext) (err error)

func (*PluginManager) GetID 

func (e *PluginManager) GetID() string

func (*PluginManager) GetProperties 

func (e *PluginManager) GetProperties() pluginsCore.PluginProperties

func (PluginManager) Handle 

func (e PluginManager) Handle(ctx context.Context, tCtx pluginsCore.TaskExecutionContext) (pluginsCore.Transition, error)

func (*PluginManager) LaunchResource 

func (e *PluginManager) LaunchResource(ctx context.Context, tCtx pluginsCore.TaskExecutionContext) (pluginsCore.Transition, error)

type PluginMetrics 

type PluginMetrics struct {
	Scope           promutils.Scope
	GetCacheMiss    labeled.StopWatch
	GetCacheHit     labeled.StopWatch
	GetAPILatency   labeled.StopWatch
	ResourceDeleted labeled.Counter
}

type PluginPhase 

type PluginPhase uint8
const (
	PluginPhaseNotStarted PluginPhase = iota
	PluginPhaseAllocationTokenAcquired
	PluginPhaseStarted
)

type PluginState 

type PluginState struct {
	Phase PluginPhase
}

type ResourceLevelMonitor added in v0.7.0 

type ResourceLevelMonitor struct {
	Scope promutils.Scope

	// Meta timer - this times each collection cycle to measure how long it takes to collect the levels GaugeVec below
	CollectorTimer *labeled.StopWatch

	// System Observability: This is a labeled gauge that emits the current number of objects in the informer. It is used
	// to monitor current levels.
	Levels *labeled.Gauge
	// contains filtered or unexported fields
}

This object is responsible for emitting metrics that show the current number of a given K8s resource kind, cut by namespace. It needs to be kicked off. The periodicity is not currently configurable because it seems unnecessary. It will also a timer measuring how long it takes to run each measurement cycle.

func (*ResourceLevelMonitor) RunCollector added in v0.7.0 

func (r *ResourceLevelMonitor) RunCollector(ctx context.Context)

func (*ResourceLevelMonitor) RunCollectorOnce added in v0.7.0 

func (r *ResourceLevelMonitor) RunCollectorOnce(ctx context.Context)

type ResourceMonitorIndex added in v0.7.0 

type ResourceMonitorIndex struct {
	// contains filtered or unexported fields
}

This struct is here to ensure that we do not create more than one of these monitors for a given GVK. It wouldn't necessarily break anything, but it's a waste of compute cycles to compute counts multiple times. This can happen if multiple plugins create the same underlying K8s resource type. If two plugins both created Pods (ie sidecar and container), without this we would launch two ResourceLevelMonitor's, have two goroutines spinning, etc.

func NewResourceMonitorIndex added in v0.7.0 

func NewResourceMonitorIndex() *ResourceMonitorIndex

func (*ResourceMonitorIndex) GetOrCreateResourceLevelMonitor added in v0.7.0 

func (r *ResourceMonitorIndex) GetOrCreateResourceLevelMonitor(ctx context.Context, scope promutils.Scope, si cache.SharedIndexInformer,
	gvk schema.GroupVersionKind) *ResourceLevelMonitor

type TaskExecutionContext added in v0.7.8 

type TaskExecutionContext struct {
	pluginsCore.TaskExecutionContext
	// contains filtered or unexported fields
}

TaskExecutionContext provides a layer on top of core TaskExecutionContext with a custom TaskExecutionMetadata.

func (TaskExecutionContext) TaskExecutionMetadata added in v0.7.8 

func (t TaskExecutionContext) TaskExecutionMetadata() pluginsCore.TaskExecutionMetadata

type TaskExecutionMetadata added in v0.7.8 

type TaskExecutionMetadata struct {
	pluginsCore.TaskExecutionMetadata
	// contains filtered or unexported fields
}

TaskExecutionMetadata provides a layer on top of the core TaskExecutionMetadata with customized annotations and labels for k8s plugins.

func (TaskExecutionMetadata) GetAnnotations added in v0.7.8 

func (t TaskExecutionMetadata) GetAnnotations() map[string]string

func (TaskExecutionMetadata) GetLabels added in v0.7.8 

func (t TaskExecutionMetadata) GetLabels() map[string]string

Source Files

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