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task.go
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task.go
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package reconciler
import (
"context"
"fmt"
"time"
"code.cloudfoundry.org/eirini-controller/k8s/utils"
eiriniv1 "code.cloudfoundry.org/eirini-controller/pkg/apis/eirini/v1"
"code.cloudfoundry.org/lager"
exterrors "github.com/pkg/errors"
batchv1 "k8s.io/api/batch/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
type Task struct {
logger lager.Logger
client client.Client
desirer TaskDesirer
statusGetter TaskStatusGetter
ttlSeconds int
}
//counterfeiter:generate . TaskDesirer
type TaskDesirer interface {
Desire(ctx context.Context, task *eiriniv1.Task) error
}
//counterfeiter:generate . TaskStatusGetter
type TaskStatusGetter interface {
GetStatus(ctx context.Context, job *batchv1.Job) eiriniv1.TaskStatus
}
func NewTask(logger lager.Logger,
client client.Client,
desirer TaskDesirer,
statusGetter TaskStatusGetter,
ttlSeconds int) *Task {
return &Task{
logger: logger,
client: client,
desirer: desirer,
statusGetter: statusGetter,
ttlSeconds: ttlSeconds,
}
}
func (t *Task) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
logger := t.logger.Session("reconcile-task", lager.Data{"request": request})
logger.Debug("start")
task := &eiriniv1.Task{}
err := t.client.Get(ctx, request.NamespacedName, task)
if errors.IsNotFound(err) {
logger.Debug("task-not-found")
return reconcile.Result{}, nil
}
if err != nil {
logger.Error("task-get-failed", err)
return reconcile.Result{}, fmt.Errorf("could not fetch task: %w", err)
}
if taskHasCompleted(task) {
return t.handleExpiredTask(ctx, logger, task)
}
job := &batchv1.Job{}
err = t.client.Get(ctx, client.ObjectKey{Namespace: task.Namespace, Name: utils.GetJobName(task)}, job)
if errors.IsNotFound(err) {
desireErr := t.desirer.Desire(ctx, task)
return reconcile.Result{}, exterrors.Wrap(desireErr, "failed to desire task")
}
if err != nil {
return reconcile.Result{}, exterrors.Wrap(err, "failed to get job")
}
if err := t.updateTaskStatus(ctx, task, job); err != nil {
return reconcile.Result{}, exterrors.Wrap(err, "failed to update task status")
}
if taskHasCompleted(task) {
return reconcile.Result{RequeueAfter: time.Duration(t.ttlSeconds) * time.Second}, nil
}
return reconcile.Result{}, nil
}
func (t *Task) updateTaskStatus(ctx context.Context, task *eiriniv1.Task, job *batchv1.Job) error {
originalTask := task.DeepCopy()
status := t.statusGetter.GetStatus(ctx, job)
task.Status = status
return t.client.Status().Patch(ctx, task, client.MergeFrom(originalTask))
}
func (t *Task) handleExpiredTask(ctx context.Context, logger lager.Logger, task *eiriniv1.Task) (reconcile.Result, error) {
if t.taskHasExpired(task) {
logger.Debug("deleting-expired-job")
err := t.client.DeleteAllOf(ctx, &batchv1.Job{}, client.InNamespace(task.Namespace), client.MatchingFields{"metadata.name": utils.GetJobName(task)})
if err != nil {
return reconcile.Result{}, exterrors.Wrap(err, "failed to delete job")
}
}
logger.Debug("task-already-completed")
return reconcile.Result{}, nil
}
func taskHasCompleted(task *eiriniv1.Task) bool {
return task.Status.EndTime != nil &&
(task.Status.ExecutionStatus == eiriniv1.TaskFailed ||
task.Status.ExecutionStatus == eiriniv1.TaskSucceeded)
}
func (t *Task) taskHasExpired(task *eiriniv1.Task) bool {
ttlExpire := metav1.NewTime(time.Now().Add(-time.Duration(t.ttlSeconds) * time.Second))
return task.Status.EndTime.Before(&ttlExpire)
}