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/* | |
Copyright 2019 The Kubernetes Authors. | |
Licensed under the Apache License, Version 2.0 (the "License"); | |
you may not use this file except in compliance with the License. | |
You may obtain a copy of the License at | |
http://www.apache.org/licenses/LICENSE-2.0 | |
Unless required by applicable law or agreed to in writing, software | |
distributed under the License is distributed on an "AS IS" BASIS, | |
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
See the License for the specific language governing permissions and | |
limitations under the License. | |
*/ | |
package trial | |
import ( | |
"bytes" | |
"context" | |
"fmt" | |
batchv1beta "k8s.io/api/batch/v1beta1" | |
corev1 "k8s.io/api/core/v1" | |
"k8s.io/apimachinery/pkg/api/equality" | |
"k8s.io/apimachinery/pkg/api/errors" | |
"k8s.io/apimachinery/pkg/api/meta" | |
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | |
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | |
"k8s.io/apimachinery/pkg/runtime" | |
"k8s.io/apimachinery/pkg/runtime/schema" | |
"k8s.io/apimachinery/pkg/types" | |
k8syaml "k8s.io/apimachinery/pkg/util/yaml" | |
"k8s.io/client-go/tools/record" | |
"sigs.k8s.io/controller-runtime/pkg/client" | |
"sigs.k8s.io/controller-runtime/pkg/controller" | |
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" | |
"sigs.k8s.io/controller-runtime/pkg/handler" | |
"sigs.k8s.io/controller-runtime/pkg/manager" | |
"sigs.k8s.io/controller-runtime/pkg/reconcile" | |
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log" | |
"sigs.k8s.io/controller-runtime/pkg/source" | |
trialsv1alpha3 "github.com/kubeflow/katib/pkg/apis/controller/trials/v1alpha3" | |
"github.com/kubeflow/katib/pkg/controller.v1alpha3/trial/managerclient" | |
jobv1alpha3 "github.com/kubeflow/katib/pkg/job/v1alpha3" | |
) | |
const ( | |
// ControllerName is the controller name. | |
ControllerName = "trial-controller" | |
) | |
var ( | |
log = logf.Log.WithName(ControllerName) | |
) | |
// Add creates a new Trial Controller and adds it to the Manager with default RBAC. The Manager will set fields on the Controller | |
// and Start it when the Manager is Started. | |
func Add(mgr manager.Manager) error { | |
return add(mgr, newReconciler(mgr)) | |
} | |
// newReconciler returns a new reconcile.Reconciler | |
func newReconciler(mgr manager.Manager) reconcile.Reconciler { | |
r := &ReconcileTrial{ | |
Client: mgr.GetClient(), | |
scheme: mgr.GetScheme(), | |
ManagerClient: managerclient.New(), | |
recorder: mgr.GetRecorder(ControllerName), | |
} | |
r.updateStatusHandler = r.updateStatus | |
return r | |
} | |
// add adds a new Controller to mgr with r as the reconcile.Reconciler | |
func add(mgr manager.Manager, r reconcile.Reconciler) error { | |
// Create a new controller | |
c, err := controller.New("trial-controller", mgr, controller.Options{Reconciler: r}) | |
if err != nil { | |
log.Error(err, "Create trial controller error") | |
return err | |
} | |
// Watch for changes to Trial | |
err = c.Watch(&source.Kind{Type: &trialsv1alpha3.Trial{}}, &handler.EnqueueRequestForObject{}) | |
if err != nil { | |
log.Error(err, "Trial watch error") | |
return err | |
} | |
// Watch for changes to Cronjob | |
err = c.Watch( | |
&source.Kind{Type: &batchv1beta.CronJob{}}, | |
&handler.EnqueueRequestForOwner{ | |
IsController: true, | |
OwnerType: &trialsv1alpha3.Trial{}, | |
}) | |
if err != nil { | |
log.Error(err, "CronJob watch error") | |
return err | |
} | |
for _, gvk := range jobv1alpha3.GetSupportedJobList() { | |
unstructuredJob := &unstructured.Unstructured{} | |
unstructuredJob.SetGroupVersionKind(gvk) | |
err = c.Watch( | |
&source.Kind{Type: unstructuredJob}, | |
&handler.EnqueueRequestForOwner{ | |
IsController: true, | |
OwnerType: &trialsv1alpha3.Trial{}, | |
}) | |
if err != nil { | |
if meta.IsNoMatchError(err) { | |
log.Info("Job watch error. CRD might be missing. Please install CRD and restart katib-controller", "CRD Kind", gvk.Kind) | |
continue | |
} | |
return err | |
} else { | |
log.Info("Job watch added successfully", "CRD Kind", gvk.Kind) | |
} | |
} | |
log.Info("Trial controller created") | |
return nil | |
} | |
var _ reconcile.Reconciler = &ReconcileTrial{} | |
// ReconcileTrial reconciles a Trial object | |
type ReconcileTrial struct { | |
client.Client | |
scheme *runtime.Scheme | |
recorder record.EventRecorder | |
managerclient.ManagerClient | |
// updateStatusHandler is defined for test purpose. | |
updateStatusHandler updateStatusFunc | |
} | |
// Reconcile reads that state of the cluster for a Trial object and makes changes based on the state read | |
// and what is in the Trial.Spec | |
// +kubebuilder:rbac:groups=trials.kubeflow.org,resources=trials,verbs=get;list;watch;create;update;patch;delete | |
// +kubebuilder:rbac:groups=trials.kubeflow.org,resources=trials/status,verbs=get;update;patch | |
func (r *ReconcileTrial) Reconcile(request reconcile.Request) (reconcile.Result, error) { | |
// Fetch the Trial instance | |
logger := log.WithValues("Trial", request.NamespacedName) | |
original := &trialsv1alpha3.Trial{} | |
err := r.Get(context.TODO(), request.NamespacedName, original) | |
if err != nil { | |
if errors.IsNotFound(err) { | |
// Object not found, return. Created objects are automatically garbage collected. | |
// For additional cleanup logic use finalizers. | |
return reconcile.Result{}, nil | |
} | |
// Error reading the object - requeue the request. | |
logger.Error(err, "Trial Get error") | |
return reconcile.Result{}, err | |
} | |
instance := original.DeepCopy() | |
if needUpdate, finalizers := needUpdateFinalizers(instance); needUpdate { | |
return r.updateFinalizers(instance, finalizers) | |
} | |
if !instance.IsCreated() { | |
if instance.Status.StartTime == nil { | |
now := metav1.Now() | |
instance.Status.StartTime = &now | |
} | |
if instance.Status.CompletionTime == nil { | |
instance.Status.CompletionTime = &metav1.Time{} | |
} | |
msg := "Trial is created" | |
instance.MarkTrialStatusCreated(TrialCreatedReason, msg) | |
} else { | |
err := r.reconcileTrial(instance) | |
if err != nil { | |
logger.Error(err, "Reconcile trial error") | |
r.recorder.Eventf(instance, | |
corev1.EventTypeWarning, ReconcileFailedReason, | |
"Failed to reconcile: %v", err) | |
return reconcile.Result{}, err | |
} | |
} | |
if !equality.Semantic.DeepEqual(original.Status, instance.Status) { | |
//assuming that only status change | |
err = r.updateStatusHandler(instance) | |
if err != nil { | |
logger.Error(err, "Update trial instance status error") | |
return reconcile.Result{}, err | |
} | |
} | |
return reconcile.Result{}, nil | |
} | |
func (r *ReconcileTrial) reconcileTrial(instance *trialsv1alpha3.Trial) error { | |
var err error | |
logger := log.WithValues("Trial", types.NamespacedName{Name: instance.GetName(), Namespace: instance.GetNamespace()}) | |
desiredJob, err := r.getDesiredJobSpec(instance) | |
if err != nil { | |
logger.Error(err, "Job Spec Get error") | |
return err | |
} | |
deployedJob, err := r.reconcileJob(instance, desiredJob) | |
if err != nil { | |
logger.Error(err, "Reconcile job error") | |
return err | |
} | |
// Job already exists | |
// TODO Can desired Spec differ from deployedSpec? | |
if deployedJob != nil { | |
kind := deployedJob.GetKind() | |
jobProvider, err := jobv1alpha3.New(kind) | |
if err != nil { | |
logger.Error(err, "Failed to create the provider") | |
return err | |
} | |
jobCondition, err := jobProvider.GetDeployedJobStatus(deployedJob) | |
if err != nil { | |
logger.Error(err, "Get deployed status error") | |
return err | |
} | |
// Update trial observation when the job is succeeded. | |
if isJobSucceeded(jobCondition) { | |
if err = r.UpdateTrialStatusObservation(instance, deployedJob); err != nil { | |
logger.Error(err, "Update trial status observation error") | |
return err | |
} | |
} | |
// Update Trial job status only | |
// if job has succeded and if observation field is available. | |
// if job has failed | |
// This will ensure that trial is set to be complete only if metric is collected at least once | |
r.UpdateTrialStatusCondition(instance, deployedJob, jobCondition) | |
} | |
return nil | |
} | |
func (r *ReconcileTrial) reconcileJob(instance *trialsv1alpha3.Trial, desiredJob *unstructured.Unstructured) (*unstructured.Unstructured, error) { | |
var err error | |
logger := log.WithValues("Trial", types.NamespacedName{Name: instance.GetName(), Namespace: instance.GetNamespace()}) | |
apiVersion := desiredJob.GetAPIVersion() | |
kind := desiredJob.GetKind() | |
gvk := schema.FromAPIVersionAndKind(apiVersion, kind) | |
deployedJob := &unstructured.Unstructured{} | |
deployedJob.SetGroupVersionKind(gvk) | |
err = r.Get(context.TODO(), types.NamespacedName{Name: desiredJob.GetName(), Namespace: desiredJob.GetNamespace()}, deployedJob) | |
if err != nil { | |
if errors.IsNotFound(err) { | |
if instance.IsCompleted() { | |
return nil, nil | |
} | |
logger.Info("Creating Job", "kind", kind, | |
"name", desiredJob.GetName()) | |
err = r.Create(context.TODO(), desiredJob) | |
if err != nil { | |
logger.Error(err, "Create job error") | |
return nil, err | |
} | |
eventMsg := fmt.Sprintf("Job %s has been created", desiredJob.GetName()) | |
r.recorder.Eventf(instance, corev1.EventTypeNormal, JobCreatedReason, eventMsg) | |
msg := "Trial is running" | |
instance.MarkTrialStatusRunning(TrialRunningReason, msg) | |
} else { | |
logger.Error(err, "Trial Get error") | |
return nil, err | |
} | |
} else { | |
if instance.IsCompleted() && !instance.Spec.RetainRun { | |
if err = r.Delete(context.TODO(), desiredJob, client.PropagationPolicy(metav1.DeletePropagationForeground)); err != nil { | |
logger.Error(err, "Delete job error") | |
return nil, err | |
} else { | |
eventMsg := fmt.Sprintf("Job %s has been deleted", desiredJob.GetName()) | |
r.recorder.Eventf(instance, corev1.EventTypeNormal, JobDeletedReason, eventMsg) | |
return nil, nil | |
} | |
} | |
} | |
return deployedJob, nil | |
} | |
func (r *ReconcileTrial) getDesiredJobSpec(instance *trialsv1alpha3.Trial) (*unstructured.Unstructured, error) { | |
bufSize := 1024 | |
logger := log.WithValues("Trial", types.NamespacedName{Name: instance.GetName(), Namespace: instance.GetNamespace()}) | |
buf := bytes.NewBufferString(instance.Spec.RunSpec) | |
desiredJobSpec := &unstructured.Unstructured{} | |
if err := k8syaml.NewYAMLOrJSONDecoder(buf, bufSize).Decode(desiredJobSpec); err != nil { | |
logger.Error(err, "Yaml decode error") | |
return nil, err | |
} | |
if err := controllerutil.SetControllerReference(instance, desiredJobSpec, r.scheme); err != nil { | |
logger.Error(err, "Set controller reference error") | |
return nil, err | |
} | |
return desiredJobSpec, nil | |
} |