af1c9e49c4
Before this change we've assumed a constant time between schedule runs, which is not true for cases like "30 6-16/4 * * 1-5". The fix is to calculate the potential next run using the fixed schedule as the baseline, and then go back one schedule back and allow the cron library to calculate the correct time. This approach saves us from iterating multiple times between last schedule time and now, if the cronjob for any reason wasn't running for significant amount of time.
574 lines
18 KiB
Go
574 lines
18 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cronjob
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import (
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"reflect"
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"sort"
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"strings"
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"testing"
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"time"
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cron "github.com/robfig/cron/v3"
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batchv1 "k8s.io/api/batch/v1"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/client-go/tools/record"
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"k8s.io/klog/v2/ktesting"
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)
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func TestGetJobFromTemplate2(t *testing.T) {
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// getJobFromTemplate2() needs to take the job template and copy the labels and annotations
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// and other fields, and add a created-by reference.
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var one int64 = 1
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var no bool
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cj := batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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Name: "mycronjob",
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Namespace: "snazzycats",
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UID: types.UID("1a2b3c"),
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "* * * * ?",
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ConcurrencyPolicy: batchv1.AllowConcurrent,
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JobTemplate: batchv1.JobTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{"a": "b"},
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Annotations: map[string]string{"x": "y"},
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},
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Spec: batchv1.JobSpec{
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ActiveDeadlineSeconds: &one,
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ManualSelector: &no,
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Template: v1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{
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"foo": "bar",
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},
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{Image: "foo/bar"},
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},
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},
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},
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},
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},
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},
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}
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var job *batchv1.Job
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job, err := getJobFromTemplate2(&cj, time.Time{})
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if err != nil {
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t.Errorf("Did not expect error: %s", err)
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}
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if !strings.HasPrefix(job.ObjectMeta.Name, "mycronjob-") {
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t.Errorf("Wrong Name")
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}
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if len(job.ObjectMeta.Labels) != 1 {
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t.Errorf("Wrong number of labels")
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}
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if len(job.ObjectMeta.Annotations) != 1 {
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t.Errorf("Wrong number of annotations")
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}
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}
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func TestNextScheduleTime(t *testing.T) {
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logger, _ := ktesting.NewTestContext(t)
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// schedule is hourly on the hour
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schedule := "0 * * * ?"
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PraseSchedule := func(schedule string) cron.Schedule {
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sched, err := cron.ParseStandard(schedule)
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if err != nil {
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t.Errorf("Error parsing schedule: %#v", err)
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return nil
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}
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return sched
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}
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recorder := record.NewFakeRecorder(50)
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// T1 is a scheduled start time of that schedule
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T1 := *topOfTheHour()
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// T2 is a scheduled start time of that schedule after T1
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T2 := *deltaTimeAfterTopOfTheHour(1 * time.Hour)
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cj := batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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Name: "mycronjob",
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Namespace: metav1.NamespaceDefault,
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UID: types.UID("1a2b3c"),
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},
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Spec: batchv1.CronJobSpec{
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Schedule: schedule,
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ConcurrencyPolicy: batchv1.AllowConcurrent,
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JobTemplate: batchv1.JobTemplateSpec{},
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},
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}
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{
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// Case 1: no known start times, and none needed yet.
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// Creation time is before T1.
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cj.ObjectMeta.CreationTimestamp = metav1.Time{Time: T1.Add(-10 * time.Minute)}
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// Current time is more than creation time, but less than T1.
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now := T1.Add(-7 * time.Minute)
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schedule, _ := nextScheduleTime(logger, &cj, now, PraseSchedule(cj.Spec.Schedule), recorder)
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if schedule != nil {
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t.Errorf("expected no start time, got: %v", schedule)
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}
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}
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{
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// Case 2: no known start times, and one needed.
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// Creation time is before T1.
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cj.ObjectMeta.CreationTimestamp = metav1.Time{Time: T1.Add(-10 * time.Minute)}
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// Current time is after T1
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now := T1.Add(2 * time.Second)
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schedule, _ := nextScheduleTime(logger, &cj, now, PraseSchedule(cj.Spec.Schedule), recorder)
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if schedule == nil {
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t.Errorf("expected 1 start time, got nil")
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} else if !schedule.Equal(T1) {
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t.Errorf("expected: %v, got: %v", T1, schedule)
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}
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}
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{
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// Case 3: known LastScheduleTime, no start needed.
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// Creation time is before T1.
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cj.ObjectMeta.CreationTimestamp = metav1.Time{Time: T1.Add(-10 * time.Minute)}
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// Status shows a start at the expected time.
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cj.Status.LastScheduleTime = &metav1.Time{Time: T1}
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// Current time is after T1
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now := T1.Add(2 * time.Minute)
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schedule, _ := nextScheduleTime(logger, &cj, now, PraseSchedule(cj.Spec.Schedule), recorder)
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if schedule != nil {
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t.Errorf("expected 0 start times, got: %v", schedule)
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}
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}
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{
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// Case 4: known LastScheduleTime, a start needed
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// Creation time is before T1.
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cj.ObjectMeta.CreationTimestamp = metav1.Time{Time: T1.Add(-10 * time.Minute)}
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// Status shows a start at the expected time.
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cj.Status.LastScheduleTime = &metav1.Time{Time: T1}
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// Current time is after T1 and after T2
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now := T2.Add(5 * time.Minute)
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schedule, _ := nextScheduleTime(logger, &cj, now, PraseSchedule(cj.Spec.Schedule), recorder)
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if schedule == nil {
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t.Errorf("expected 1 start times, got nil")
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} else if !schedule.Equal(T2) {
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t.Errorf("expected: %v, got: %v", T2, schedule)
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}
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}
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{
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// Case 5: known LastScheduleTime, two starts needed
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cj.ObjectMeta.CreationTimestamp = metav1.Time{Time: T1.Add(-2 * time.Hour)}
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cj.Status.LastScheduleTime = &metav1.Time{Time: T1.Add(-1 * time.Hour)}
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// Current time is after T1 and after T2
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now := T2.Add(5 * time.Minute)
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schedule, _ := nextScheduleTime(logger, &cj, now, PraseSchedule(cj.Spec.Schedule), recorder)
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if schedule == nil {
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t.Errorf("expected 1 start times, got nil")
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} else if !schedule.Equal(T2) {
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t.Errorf("expected: %v, got: %v", T2, schedule)
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}
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}
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{
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// Case 6: now is way way ahead of last start time, and there is no deadline.
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cj.ObjectMeta.CreationTimestamp = metav1.Time{Time: T1.Add(-2 * time.Hour)}
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cj.Status.LastScheduleTime = &metav1.Time{Time: T1.Add(-1 * time.Hour)}
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now := T2.Add(10 * 24 * time.Hour)
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schedule, _ := nextScheduleTime(logger, &cj, now, PraseSchedule(cj.Spec.Schedule), recorder)
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if schedule == nil {
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t.Errorf("expected more than 0 missed times")
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}
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}
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{
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// Case 7: now is way way ahead of last start time, but there is a short deadline.
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cj.ObjectMeta.CreationTimestamp = metav1.Time{Time: T1.Add(-2 * time.Hour)}
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cj.Status.LastScheduleTime = &metav1.Time{Time: T1.Add(-1 * time.Hour)}
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now := T2.Add(10 * 24 * time.Hour)
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// Deadline is short
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deadline := int64(2 * 60 * 60)
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cj.Spec.StartingDeadlineSeconds = &deadline
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schedule, _ := nextScheduleTime(logger, &cj, now, PraseSchedule(cj.Spec.Schedule), recorder)
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if schedule == nil {
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t.Errorf("expected more than 0 missed times")
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}
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}
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{
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// Case 8: ensure the error from mostRecentScheduleTime gets populated up
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cj.ObjectMeta.CreationTimestamp = metav1.Time{Time: T1.Add(10 * time.Second)}
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cj.Status.LastScheduleTime = nil
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now := *deltaTimeAfterTopOfTheHour(1 * time.Hour)
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// rouge schedule
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schedule, err := nextScheduleTime(logger, &cj, now, PraseSchedule("59 23 31 2 *"), recorder)
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if schedule != nil {
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t.Errorf("expected no start time, got: %v", schedule)
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}
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if err == nil {
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t.Errorf("expected error")
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}
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}
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}
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func TestByJobStartTime(t *testing.T) {
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now := metav1.NewTime(time.Date(2018, time.January, 1, 2, 3, 4, 5, time.UTC))
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later := metav1.NewTime(time.Date(2019, time.January, 1, 2, 3, 4, 5, time.UTC))
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aNil := &batchv1.Job{
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ObjectMeta: metav1.ObjectMeta{Name: "a"},
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Status: batchv1.JobStatus{},
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}
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bNil := &batchv1.Job{
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ObjectMeta: metav1.ObjectMeta{Name: "b"},
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Status: batchv1.JobStatus{},
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}
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aSet := &batchv1.Job{
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ObjectMeta: metav1.ObjectMeta{Name: "a"},
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Status: batchv1.JobStatus{StartTime: &now},
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}
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bSet := &batchv1.Job{
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ObjectMeta: metav1.ObjectMeta{Name: "b"},
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Status: batchv1.JobStatus{StartTime: &now},
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}
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aSetLater := &batchv1.Job{
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ObjectMeta: metav1.ObjectMeta{Name: "a"},
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Status: batchv1.JobStatus{StartTime: &later},
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}
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testCases := []struct {
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name string
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input, expected []*batchv1.Job
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}{
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{
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name: "both have nil start times",
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input: []*batchv1.Job{bNil, aNil},
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expected: []*batchv1.Job{aNil, bNil},
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},
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{
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name: "only the first has a nil start time",
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input: []*batchv1.Job{aNil, bSet},
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expected: []*batchv1.Job{bSet, aNil},
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},
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{
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name: "only the second has a nil start time",
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input: []*batchv1.Job{aSet, bNil},
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expected: []*batchv1.Job{aSet, bNil},
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},
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{
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name: "both have non-nil, equal start time",
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input: []*batchv1.Job{bSet, aSet},
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expected: []*batchv1.Job{aSet, bSet},
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},
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{
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name: "both have non-nil, different start time",
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input: []*batchv1.Job{aSetLater, bSet},
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expected: []*batchv1.Job{bSet, aSetLater},
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},
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}
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for _, testCase := range testCases {
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sort.Sort(byJobStartTime(testCase.input))
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if !reflect.DeepEqual(testCase.input, testCase.expected) {
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t.Errorf("case: '%s', jobs not sorted as expected", testCase.name)
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}
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}
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}
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func TestMostRecentScheduleTime(t *testing.T) {
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metav1TopOfTheHour := metav1.NewTime(*topOfTheHour())
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metav1HalfPastTheHour := metav1.NewTime(*deltaTimeAfterTopOfTheHour(30 * time.Minute))
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metav1MinuteAfterTopOfTheHour := metav1.NewTime(*deltaTimeAfterTopOfTheHour(1 * time.Minute))
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oneMinute := int64(60)
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tenSeconds := int64(10)
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tests := []struct {
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name string
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cj *batchv1.CronJob
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includeSDS bool
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now time.Time
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expectedEarliestTime time.Time
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expectedRecentTime *time.Time
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expectedNumberOfMisses int64
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wantErr bool
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}{
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{
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name: "now before next schedule",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1TopOfTheHour,
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "0 * * * *",
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},
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},
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now: topOfTheHour().Add(30 * time.Second),
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expectedRecentTime: nil,
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expectedEarliestTime: *topOfTheHour(),
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},
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{
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name: "now just after next schedule",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1TopOfTheHour,
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "0 * * * *",
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},
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},
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now: topOfTheHour().Add(61 * time.Minute),
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expectedRecentTime: deltaTimeAfterTopOfTheHour(60 * time.Minute),
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expectedEarliestTime: *topOfTheHour(),
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expectedNumberOfMisses: 1,
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},
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{
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name: "missed 5 schedules",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1.NewTime(*deltaTimeAfterTopOfTheHour(10 * time.Second)),
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "0 * * * *",
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},
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},
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now: *deltaTimeAfterTopOfTheHour(301 * time.Minute),
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expectedRecentTime: deltaTimeAfterTopOfTheHour(300 * time.Minute),
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expectedEarliestTime: *deltaTimeAfterTopOfTheHour(10 * time.Second),
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expectedNumberOfMisses: 5,
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},
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{
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name: "complex schedule",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1TopOfTheHour,
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "30 6-16/4 * * 1-5",
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},
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Status: batchv1.CronJobStatus{
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LastScheduleTime: &metav1HalfPastTheHour,
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},
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},
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now: *deltaTimeAfterTopOfTheHour(24*time.Hour + 31*time.Minute),
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expectedRecentTime: deltaTimeAfterTopOfTheHour(24*time.Hour + 30*time.Minute),
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expectedEarliestTime: *deltaTimeAfterTopOfTheHour(30 * time.Minute),
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expectedNumberOfMisses: 2,
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},
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{
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name: "another complex schedule",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1TopOfTheHour,
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "30 10,11,12 * * 1-5",
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},
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Status: batchv1.CronJobStatus{
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LastScheduleTime: &metav1HalfPastTheHour,
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},
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},
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now: *deltaTimeAfterTopOfTheHour(30*time.Hour + 30*time.Minute),
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expectedRecentTime: nil,
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expectedEarliestTime: *deltaTimeAfterTopOfTheHour(30 * time.Minute),
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expectedNumberOfMisses: 30,
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},
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{
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name: "complex schedule with longer diff between executions",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1TopOfTheHour,
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "30 6-16/4 * * 1-5",
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},
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Status: batchv1.CronJobStatus{
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LastScheduleTime: &metav1HalfPastTheHour,
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},
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},
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now: *deltaTimeAfterTopOfTheHour(96*time.Hour + 31*time.Minute),
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expectedRecentTime: deltaTimeAfterTopOfTheHour(96*time.Hour + 30*time.Minute),
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expectedEarliestTime: *deltaTimeAfterTopOfTheHour(30 * time.Minute),
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expectedNumberOfMisses: 6,
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},
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{
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name: "complex schedule with shorter diff between executions",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1TopOfTheHour,
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "30 6-16/4 * * 1-5",
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},
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},
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now: *deltaTimeAfterTopOfTheHour(24*time.Hour + 31*time.Minute),
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expectedRecentTime: deltaTimeAfterTopOfTheHour(24*time.Hour + 30*time.Minute),
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expectedEarliestTime: *topOfTheHour(),
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expectedNumberOfMisses: 7,
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},
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{
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name: "@every schedule",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1.NewTime(*deltaTimeAfterTopOfTheHour(-59 * time.Minute)),
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "@every 1h",
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StartingDeadlineSeconds: &tenSeconds,
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},
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Status: batchv1.CronJobStatus{
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LastScheduleTime: &metav1MinuteAfterTopOfTheHour,
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},
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},
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now: *deltaTimeAfterTopOfTheHour(7 * 24 * time.Hour),
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expectedRecentTime: deltaTimeAfterTopOfTheHour((6 * 24 * time.Hour) + 23*time.Hour + 1*time.Minute),
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expectedEarliestTime: *deltaTimeAfterTopOfTheHour(1 * time.Minute),
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expectedNumberOfMisses: 167,
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},
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{
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name: "rogue cronjob",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1.NewTime(*deltaTimeAfterTopOfTheHour(10 * time.Second)),
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "59 23 31 2 *",
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},
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},
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now: *deltaTimeAfterTopOfTheHour(1 * time.Hour),
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expectedRecentTime: nil,
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expectedNumberOfMisses: 0,
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wantErr: true,
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},
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{
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name: "earliestTime being CreationTimestamp and LastScheduleTime",
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cj: &batchv1.CronJob{
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ObjectMeta: metav1.ObjectMeta{
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CreationTimestamp: metav1TopOfTheHour,
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},
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Spec: batchv1.CronJobSpec{
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Schedule: "0 * * * *",
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},
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Status: batchv1.CronJobStatus{
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LastScheduleTime: &metav1TopOfTheHour,
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},
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},
|
|
now: *deltaTimeAfterTopOfTheHour(30 * time.Second),
|
|
expectedEarliestTime: *topOfTheHour(),
|
|
expectedRecentTime: nil,
|
|
},
|
|
{
|
|
name: "earliestTime being LastScheduleTime",
|
|
cj: &batchv1.CronJob{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
CreationTimestamp: metav1TopOfTheHour,
|
|
},
|
|
Spec: batchv1.CronJobSpec{
|
|
Schedule: "*/5 * * * *",
|
|
},
|
|
Status: batchv1.CronJobStatus{
|
|
LastScheduleTime: &metav1HalfPastTheHour,
|
|
},
|
|
},
|
|
now: *deltaTimeAfterTopOfTheHour(31 * time.Minute),
|
|
expectedEarliestTime: *deltaTimeAfterTopOfTheHour(30 * time.Minute),
|
|
expectedRecentTime: nil,
|
|
},
|
|
{
|
|
name: "earliestTime being LastScheduleTime (within StartingDeadlineSeconds)",
|
|
cj: &batchv1.CronJob{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
CreationTimestamp: metav1TopOfTheHour,
|
|
},
|
|
Spec: batchv1.CronJobSpec{
|
|
Schedule: "*/5 * * * *",
|
|
StartingDeadlineSeconds: &oneMinute,
|
|
},
|
|
Status: batchv1.CronJobStatus{
|
|
LastScheduleTime: &metav1HalfPastTheHour,
|
|
},
|
|
},
|
|
now: *deltaTimeAfterTopOfTheHour(31 * time.Minute),
|
|
expectedEarliestTime: *deltaTimeAfterTopOfTheHour(30 * time.Minute),
|
|
expectedRecentTime: nil,
|
|
},
|
|
{
|
|
name: "earliestTime being LastScheduleTime (outside StartingDeadlineSeconds)",
|
|
cj: &batchv1.CronJob{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
CreationTimestamp: metav1TopOfTheHour,
|
|
},
|
|
Spec: batchv1.CronJobSpec{
|
|
Schedule: "*/5 * * * *",
|
|
StartingDeadlineSeconds: &oneMinute,
|
|
},
|
|
Status: batchv1.CronJobStatus{
|
|
LastScheduleTime: &metav1HalfPastTheHour,
|
|
},
|
|
},
|
|
includeSDS: true,
|
|
now: *deltaTimeAfterTopOfTheHour(32 * time.Minute),
|
|
expectedEarliestTime: *deltaTimeAfterTopOfTheHour(31 * time.Minute),
|
|
expectedRecentTime: nil,
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
sched, err := cron.ParseStandard(tt.cj.Spec.Schedule)
|
|
if err != nil {
|
|
t.Errorf("error setting up the test, %s", err)
|
|
}
|
|
gotEarliestTime, gotRecentTime, gotNumberOfMisses, err := mostRecentScheduleTime(tt.cj, tt.now, sched, tt.includeSDS)
|
|
if tt.wantErr {
|
|
if err == nil {
|
|
t.Error("mostRecentScheduleTime() got no error when expected one")
|
|
}
|
|
return
|
|
}
|
|
if !tt.wantErr && err != nil {
|
|
t.Error("mostRecentScheduleTime() got error when none expected")
|
|
}
|
|
if gotEarliestTime.IsZero() {
|
|
t.Errorf("earliestTime should never be 0, want %v", tt.expectedEarliestTime)
|
|
}
|
|
if !gotEarliestTime.Equal(tt.expectedEarliestTime) {
|
|
t.Errorf("expectedEarliestTime - got %v, want %v", gotEarliestTime, tt.expectedEarliestTime)
|
|
}
|
|
if !reflect.DeepEqual(gotRecentTime, tt.expectedRecentTime) {
|
|
t.Errorf("expectedRecentTime - got %v, want %v", gotRecentTime, tt.expectedRecentTime)
|
|
}
|
|
if gotNumberOfMisses != tt.expectedNumberOfMisses {
|
|
t.Errorf("expectedNumberOfMisses - got %v, want %v", gotNumberOfMisses, tt.expectedNumberOfMisses)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func topOfTheHour() *time.Time {
|
|
T1, err := time.Parse(time.RFC3339, "2016-05-19T10:00:00Z")
|
|
if err != nil {
|
|
panic("test setup error")
|
|
}
|
|
return &T1
|
|
}
|
|
|
|
func deltaTimeAfterTopOfTheHour(duration time.Duration) *time.Time {
|
|
T1, err := time.Parse(time.RFC3339, "2016-05-19T10:00:00Z")
|
|
if err != nil {
|
|
panic("test setup error")
|
|
}
|
|
t := T1.Add(duration)
|
|
return &t
|
|
}
|