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controller.go
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controller.go
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package analysis
import (
"time"
log "github.com/sirupsen/logrus"
batchv1 "k8s.io/api/batch/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/util/wait"
batchinformers "k8s.io/client-go/informers/batch/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"github.com/argoproj/argo-rollouts/controller/metrics"
"github.com/argoproj/argo-rollouts/metricproviders"
register "github.com/argoproj/argo-rollouts/pkg/apis/rollouts"
"github.com/argoproj/argo-rollouts/pkg/apis/rollouts/v1alpha1"
clientset "github.com/argoproj/argo-rollouts/pkg/client/clientset/versioned"
informers "github.com/argoproj/argo-rollouts/pkg/client/informers/externalversions/rollouts/v1alpha1"
listers "github.com/argoproj/argo-rollouts/pkg/client/listers/rollouts/v1alpha1"
controllerutil "github.com/argoproj/argo-rollouts/utils/controller"
logutil "github.com/argoproj/argo-rollouts/utils/log"
"github.com/argoproj/argo-rollouts/utils/record"
)
// Controller is the controller implementation for Analysis resources
type Controller struct {
// kubeclientset is a standard kubernetes clientset
kubeclientset kubernetes.Interface
// analysisclientset is a clientset for our own API group
argoProjClientset clientset.Interface
analysisRunLister listers.AnalysisRunLister
analysisRunSynced cache.InformerSynced
jobInformer batchinformers.JobInformer
metricsServer *metrics.MetricsServer
newProvider func(logCtx log.Entry, metric v1alpha1.Metric) (metricproviders.Provider, error)
// used for unit testing
enqueueAnalysis func(obj interface{})
enqueueAnalysisAfter func(obj interface{}, duration time.Duration)
// 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.
analysisRunWorkQueue workqueue.RateLimitingInterface
// recorder is an event recorder for recording Event resources to the
// Kubernetes API.
recorder record.EventRecorder
resyncPeriod time.Duration
}
// ControllerConfig describes the data required to instantiate a new analysis controller
type ControllerConfig struct {
KubeClientSet kubernetes.Interface
ArgoProjClientset clientset.Interface
AnalysisRunInformer informers.AnalysisRunInformer
JobInformer batchinformers.JobInformer
ResyncPeriod time.Duration
AnalysisRunWorkQueue workqueue.RateLimitingInterface
MetricsServer *metrics.MetricsServer
Recorder record.EventRecorder
}
// NewController returns a new analysis controller
func NewController(cfg ControllerConfig) *Controller {
controller := &Controller{
kubeclientset: cfg.KubeClientSet,
argoProjClientset: cfg.ArgoProjClientset,
analysisRunLister: cfg.AnalysisRunInformer.Lister(),
metricsServer: cfg.MetricsServer,
analysisRunWorkQueue: cfg.AnalysisRunWorkQueue,
jobInformer: cfg.JobInformer,
analysisRunSynced: cfg.AnalysisRunInformer.Informer().HasSynced,
recorder: cfg.Recorder,
resyncPeriod: cfg.ResyncPeriod,
}
controller.enqueueAnalysis = func(obj interface{}) {
controllerutil.Enqueue(obj, cfg.AnalysisRunWorkQueue)
}
controller.enqueueAnalysisAfter = func(obj interface{}, duration time.Duration) {
controllerutil.EnqueueAfter(obj, duration, cfg.AnalysisRunWorkQueue)
}
providerFactory := metricproviders.ProviderFactory{
KubeClient: controller.kubeclientset,
JobLister: cfg.JobInformer.Lister(),
}
controller.newProvider = providerFactory.NewProvider
cfg.JobInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
controller.enqueueIfCompleted(obj)
},
UpdateFunc: func(oldObj, newObj interface{}) {
controller.enqueueIfCompleted(newObj)
},
DeleteFunc: func(obj interface{}) {
controller.enqueueIfCompleted(obj)
},
})
log.Info("Setting up analysis event handlers")
// Set up an event handler for when analysis resources change
cfg.AnalysisRunInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: controller.enqueueAnalysis,
UpdateFunc: func(old, new interface{}) {
controller.enqueueAnalysis(new)
},
DeleteFunc: controller.enqueueAnalysis,
})
return controller
}
func (c *Controller) Run(threadiness int, stopCh <-chan struct{}) error {
log.Info("Starting analysis workers")
for i := 0; i < threadiness; i++ {
go wait.Until(func() {
controllerutil.RunWorker(c.analysisRunWorkQueue, logutil.AnalysisRunKey, c.syncHandler, c.metricsServer)
}, time.Second, stopCh)
}
log.Infof("Started %d analysis workers", threadiness)
<-stopCh
log.Info("Shutting down analysis workers")
return nil
}
func (c *Controller) syncHandler(key string) error {
startTime := time.Now()
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
return err
}
log.WithField(logutil.AnalysisRunKey, name).WithField(logutil.NamespaceKey, namespace).Infof("Started syncing Analysis at (%v)", startTime)
run, err := c.analysisRunLister.AnalysisRuns(namespace).Get(name)
if k8serrors.IsNotFound(err) {
log.WithField(logutil.AnalysisRunKey, name).WithField(logutil.NamespaceKey, namespace).Info("Analysis has been deleted")
return nil
}
if err != nil {
return err
}
defer func() {
duration := time.Since(startTime)
c.metricsServer.IncAnalysisRunReconcile(run, duration)
logCtx := logutil.WithAnalysisRun(run).WithField("time_ms", duration.Seconds()*1e3)
logCtx.Info("Reconciliation completed")
}()
if run.DeletionTimestamp != nil {
logutil.WithAnalysisRun(run).Info("No reconciliation as analysis marked for deletion")
return nil
}
newRun := c.reconcileAnalysisRun(run)
return c.persistAnalysisRunStatus(run, newRun.Status)
}
func (c *Controller) enqueueIfCompleted(obj interface{}) {
job, ok := obj.(*batchv1.Job)
if !ok {
return
}
for _, condition := range job.Status.Conditions {
switch condition.Type {
case batchv1.JobFailed, batchv1.JobComplete:
controllerutil.EnqueueParentObject(job, register.AnalysisRunKind, c.enqueueAnalysis)
return
}
}
}