controller

package
v0.16.16 Latest Latest
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 Go to latest Published: Jan 25, 2022 License: Apache-2.0 Imports: 49 Imported by: 1

Documentation

Overview

Package controller contains the K8s controller logic. This does not contain the actual workflow re-conciliation. It is then entrypoint into the K8s based Flyte controller.

Index

Constants

View Source 
const FinalizerKey = "flyte-finalizer"

Variables

This section is empty.

Functions

func CalculateHoursToDelete 

func CalculateHoursToDelete(retentionPeriodHours, currentHourOfDay int) []string

Calculates a list of all the hours that should be deleted given the current hour of the day and the retentionperiod in hours Usually this is a list of all hours out of the 24 hours in the day - retention period - the current hour of the day

func CompletedWorkflowsLabelSelector 

func CompletedWorkflowsLabelSelector() *v1.LabelSelector

Creates a new LabelSelector that selects all workflows that have the completed Label

func CompletedWorkflowsSelectorOutsideRetentionPeriod 

func CompletedWorkflowsSelectorOutsideRetentionPeriod(retentionPeriodHours int, currentTime time.Time) *v1.LabelSelector

Creates a new selector that selects all completed workflows and workflows with completed hour label outside of the retention window

func FinalizersIdentical 

func FinalizersIdentical(o1 v1.Object, o2 v1.Object) bool

Currently we only compare the lengths of finalizers. If you add finalizers directly these API;'s will not work

func HasCompletedLabel 

func HasCompletedLabel(w *v1alpha1.FlyteWorkflow) bool

func HasFinalizer 

func HasFinalizer(meta v1.Object) bool

Check if any finalizer is set

func IgnoreCompletedWorkflowsLabelSelector 

func IgnoreCompletedWorkflowsLabelSelector() *v1.LabelSelector

This function creates a label selector, that will ignore all objects (in this case workflow) that DOES NOT have a label key=workflowTerminationStatusKey with a value=workflowTerminatedValue

func IsDeleted 

func IsDeleted(meta v1.Object) bool

Check if the deletion timestamp is set, this is set automatically when an object is deleted

func NewWorkQueue 

func NewWorkQueue(ctx context.Context, cfg config.WorkqueueConfig, name string) (workqueue.RateLimitingInterface, error)

func RecordSystemError added in v0.7.0 

func RecordSystemError(w *v1alpha1.FlyteWorkflow, err error) *v1alpha1.FlyteWorkflow

Helper method to record system error in the workflow.

func ResetFinalizers 

func ResetFinalizers(meta v1.Object)

Reset all the finalizers on the object

func SetCompletedLabel 

func SetCompletedLabel(w *v1alpha1.FlyteWorkflow, currentTime time.Time)

func SetFinalizerIfEmpty 

func SetFinalizerIfEmpty(meta v1.Object, finalizer string)

Sets a new finalizer in case the finalizer is empty

Types

type BatchingWorkQueue 

type BatchingWorkQueue struct {
	// workqueue is a rate limited work queue. This is used to queue work to be
	// processed instead of performing it as soon as a change happens. This
	// means we can ensure we only process a fixed amount of resources at a
	// time, and makes it easy to ensure we are never processing the same item
	// simultaneously in two different workers.
	workqueue.RateLimitingInterface
	// contains filtered or unexported fields
}

A BatchingWorkQueue consists of 2 queues and migrates items from sub-queue to parent queue as a batch at a specified interval

func (*BatchingWorkQueue) AddToSubQueue 

func (b *BatchingWorkQueue) AddToSubQueue(item interface{})

func (*BatchingWorkQueue) AddToSubQueueAfter 

func (b *BatchingWorkQueue) AddToSubQueueAfter(item interface{}, duration time.Duration)

func (*BatchingWorkQueue) AddToSubQueueRateLimited 

func (b *BatchingWorkQueue) AddToSubQueueRateLimited(item interface{})

func (*BatchingWorkQueue) ShutdownAll 

func (b *BatchingWorkQueue) ShutdownAll()

func (*BatchingWorkQueue) Start 

func (b *BatchingWorkQueue) Start(ctx context.Context)

type CompositeWorkQueue 

type CompositeWorkQueue interface {
	workqueue.RateLimitingInterface
	// Specialized interface that should be called to start the migration of work from SubQueue to primaryQueue
	Start(ctx context.Context)
	// Shutsdown all the queues that are in the context
	ShutdownAll()
	// Adds the item explicitly to the subqueue
	AddToSubQueue(item interface{})
	// Adds the item explicitly to the subqueue, using a rate limiter
	AddToSubQueueRateLimited(item interface{})
	// Adds the item explicitly to the subqueue after some duration
	AddToSubQueueAfter(item interface{}, duration time.Duration)
}

A CompositeWorkQueue can be used in cases where the work is enqueued by two sources. It can be enqueued by either

  1. Informer for the Primary Object itself. In case of FlytePropeller, this is the workflow object
  2. Informer or any other process that enqueues the top-level object for re-evaluation in response to one of the sub-objects being ready. In the case of FlytePropeller this is the "Node/Task" updates, will re-enqueue the workflow to be re-evaluated

func NewCompositeWorkQueue 

func NewCompositeWorkQueue(ctx context.Context, cfg config.CompositeQueueConfig, scope promutils.Scope) (CompositeWorkQueue, error)

type Controller 

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

Controller is the controller implementation for FlyteWorkflow resources

func New 

func New(ctx context.Context, cfg *config.Config, kubeclientset kubernetes.Interface, flytepropellerClientset clientset.Interface,
	flyteworkflowInformerFactory informers.SharedInformerFactory, kubeClient executors.Client, scope promutils.Scope) (*Controller, error)

NewController returns a new FlyteWorkflow controller

func (*Controller) Run 

func (c *Controller) Run(ctx context.Context) error

Runs either as a leader -if configured- or as a standalone process.

type GarbageCollector 

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

Garbage collector is an active background cleanup service, that deletes all workflows that are completed and older than the configured TTL

func NewGarbageCollector 

func NewGarbageCollector(cfg *config.Config, scope promutils.Scope, clk clock.Clock, namespaceClient corev1.NamespaceInterface, wfClient v1alpha1.FlyteworkflowV1alpha1Interface) (*GarbageCollector, error)

func (*GarbageCollector) StartGC 

func (g *GarbageCollector) StartGC(ctx context.Context) error

Use this method to start a background garbage collection routine. Use the context to signal an exit signal

type Handler 

type Handler interface {
	// Initialize the Handler
	Initialize(ctx context.Context) error
	// Handle method that should handle the object and try to converge the desired and the actual state
	Handle(ctx context.Context, namespace, key string) error
}

type Propeller 

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

Core Propeller structure that houses the Reconciliation loop for Flytepropeller

func NewPropellerHandler 

func NewPropellerHandler(_ context.Context, cfg *config.Config, wfStore workflowstore.FlyteWorkflow, executor executors.Workflow, scope promutils.Scope) *Propeller

NewPropellerHandler creates a new Propeller and initializes metrics

func (*Propeller) Handle 

func (p *Propeller) Handle(ctx context.Context, namespace, name string) error

Handle method is the entry point for the reconciler. It compares the actual state with the desired, and attempts to converge the two. It then updates the GetExecutionStatus block of the FlyteWorkflow resource with the current status of the resource. Every FlyteWorkflow transitions through the following

The Workflow to be worked on is identified for the given namespace and executionID (which is the name of the workflow) The return value should be an error, in the case, we wish to retry this workflow <pre> 

+--------+        +---------+        +------------+     +---------+
|        |        |         |        |            |     |         |
| Ready  +--------> Running +--------> Succeeding +-----> Success |
|        |        |         |        |            |     |         |
+--------+        +---------+        +------------+     +---------+
    |                  |
    |                  |
    |             +----v----+        +---------------------+        +--------+
    |             |         |        |     (optional)      |        |        |
    +-------------> Failing +--------> HandlingFailureNode +--------> Failed |
                  |         |        |                     |        |        |
                  +---------+        +---------------------+        +--------+

</pre>

func (*Propeller) Initialize 

func (p *Propeller) Initialize(ctx context.Context) error

Initializes all downstream executors

func (*Propeller) TryMutateWorkflow added in v0.7.0 

func (p *Propeller) TryMutateWorkflow(ctx context.Context, originalW *v1alpha1.FlyteWorkflow) (*v1alpha1.FlyteWorkflow, error)

TryMutateWorkflow will try to mutate the workflow by traversing it and reconciling the desired and actual state. The desired state here is the entire workflow is completed, actual state is each nodes current execution state.

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 promutils.StopWatch
	// contains filtered or unexported fields
}

This object is responsible for emitting metrics that show the current number of Flyte workflows, cut by project and domain. 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 NewResourceLevelMonitor added in v0.7.0 

func NewResourceLevelMonitor(scope promutils.Scope, lister lister.FlyteWorkflowLister) *ResourceLevelMonitor

func (*ResourceLevelMonitor) RunCollector added in v0.7.0 

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

type SimpleWorkQueue 

type SimpleWorkQueue struct {
	// workqueue is a rate limited work queue. This is used to queue work to be
	// processed instead of performing it as soon as a change happens. This
	// means we can ensure we only process a fixed amount of resources at a
	// time, and makes it easy to ensure we are never processing the same item
	// simultaneously in two different workers.
	workqueue.RateLimitingInterface
}

SimpleWorkQueue provides a simple RateLimitingInterface, but ensures that the compositeQueue interface works with a default queue.

func (*SimpleWorkQueue) AddToSubQueue 

func (s *SimpleWorkQueue) AddToSubQueue(item interface{})

func (*SimpleWorkQueue) AddToSubQueueAfter 

func (s *SimpleWorkQueue) AddToSubQueueAfter(item interface{}, duration time.Duration)

func (*SimpleWorkQueue) AddToSubQueueRateLimited 

func (s *SimpleWorkQueue) AddToSubQueueRateLimited(item interface{})

func (*SimpleWorkQueue) ShutdownAll 

func (s *SimpleWorkQueue) ShutdownAll()

func (*SimpleWorkQueue) Start 

func (s *SimpleWorkQueue) Start(ctx context.Context)

type WorkerPool 

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

func NewWorkerPool 

func NewWorkerPool(ctx context.Context, scope promutils.Scope, workQueue CompositeWorkQueue, handler Handler) *WorkerPool

func (*WorkerPool) Initialize 

func (w *WorkerPool) Initialize(ctx context.Context) error

func (*WorkerPool) Run 

func (w *WorkerPool) Run(ctx context.Context, threadiness int, synced ...cache.InformerSynced) error

Run will set up the event handlers for types we are interested in, as well as syncing informer caches and starting workers. It will block until stopCh is closed, at which point it will shutdown the workqueue and wait for workers to finish processing their current work items.

Source Files

View all Source files

Directories

Path Synopsis
Package config contains the core configuration for FlytePropeller.
 Package config contains the core configuration for FlytePropeller.
mocks
Package nodes contains the Core Nodes Executor implementation and a subpackage for every node kind This module implements the core Nodes executor.
 Package nodes contains the Core Nodes Executor implementation and a subpackage for every node kind This module implements the core Nodes executor.
branch
common
dynamic
dynamic/mocks
end
errors
handler
handler/mocks
mocks
recovery
recovery/mocks
start
subworkflow
subworkflow/launchplan
subworkflow/launchplan/mocks
task
task/backoff
task/catalog
task/catalog/datacatalog
task/codex
task/config
task/fakeplugins
task/k8s
task/resourcemanager
task/resourcemanager/config
task/resourcemanager/mocks
task/secretmanager
errors
mocks

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