feat(schedule):sync schedules in db to js datastore

- add a sync worker to sync db schedules when js starting. add missing ones and clear dirty ones.
- update task model to contain status revision info
- update job lifecycle tracker save() method
- update job ACK model
- add UT cases
- update malformat comments

fix #15323

Signed-off-by: Steven Zou <szou@vmware.com>

src/jobservice/job/context.go

@@ -63,10 +63,10 @@ type Context interface {
 	//  flag to indicate if have command
 	OPCommand() (OPCommand, bool)
 
-	// Return the logger
+	// GetLogger returns the logger
 	GetLogger() logger.Interface
 
-	// Get tracker
+	// Tracker of job.
 	Tracker() Tracker
 }
 

src/jobservice/job/models.go

@@ -15,6 +15,8 @@
 package job
 
 import (
+	"encoding/json"
+
 	"github.com/goharbor/harbor/src/jobservice/common/utils"
 	"github.com/goharbor/harbor/src/lib/errors"
 )
@@ -78,6 +80,16 @@ type ACK struct {
 	CheckInAt int64  `json:"check_in_at"`
 }
 
+// JSON of ACK.
+func (a *ACK) JSON() string {
+	str, err := json.Marshal(a)
+	if err != nil {
+		return ""
+	}
+
+	return string(str)
+}
+
 // ActionRequest defines for triggering job action like stop/cancel.
 type ActionRequest struct {
 	Action string `json:"action"`

src/jobservice/job/tracker.go

@@ -335,10 +335,20 @@ func (bt *basicTracker) Save() (err error) {
 	}
 	// Set update timestamp
 	args = append(args, "update_time", time.Now().Unix())
-	// Set the first revision
-	args = append(args, "revision", time.Now().Unix())
+	// Set the first revision if it is not set.
+	rev := time.Now().Unix()
+	if stats.Info.Revision > 0 {
+		rev = stats.Info.Revision
+	}
+	args = append(args, "revision", rev)
 
-	// ACK data is saved/updated not via tracker, so ignore the ACK saving
+	// For restoring if ACK is not nil.
+	if stats.Info.HookAck != nil {
+		ack := stats.Info.HookAck.JSON()
+		if len(ack) > 0 {
+			args = append(args, "ack")
+		}
+	}
 
 	// Do it in a transaction
 	err = conn.Send("MULTI")

src/jobservice/mgt/mock.go

@@ -0,0 +1,17 @@
+// Copyright Project Harbor 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 mgt
+
+//go:generate mockery --name Manager --output . --outpkg mgt --filename mock_manager.go --structname MockManager --inpackage

src/jobservice/mgt/mock_manager.go

@@ -0,0 +1,142 @@
+// Code generated by mockery v2.1.0. DO NOT EDIT.
+
+package mgt
+
+import (
+	job "github.com/goharbor/harbor/src/jobservice/job"
+	mock "github.com/stretchr/testify/mock"
+
+	query "github.com/goharbor/harbor/src/jobservice/common/query"
+)
+
+// MockManager is an autogenerated mock type for the Manager type
+type MockManager struct {
+	mock.Mock
+}
+
+// GetJob provides a mock function with given fields: jobID
+func (_m *MockManager) GetJob(jobID string) (*job.Stats, error) {
+	ret := _m.Called(jobID)
+
+	var r0 *job.Stats
+	if rf, ok := ret.Get(0).(func(string) *job.Stats); ok {
+		r0 = rf(jobID)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*job.Stats)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string) error); ok {
+		r1 = rf(jobID)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// GetJobs provides a mock function with given fields: q
+func (_m *MockManager) GetJobs(q *query.Parameter) ([]*job.Stats, int64, error) {
+	ret := _m.Called(q)
+
+	var r0 []*job.Stats
+	if rf, ok := ret.Get(0).(func(*query.Parameter) []*job.Stats); ok {
+		r0 = rf(q)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*job.Stats)
+		}
+	}
+
+	var r1 int64
+	if rf, ok := ret.Get(1).(func(*query.Parameter) int64); ok {
+		r1 = rf(q)
+	} else {
+		r1 = ret.Get(1).(int64)
+	}
+
+	var r2 error
+	if rf, ok := ret.Get(2).(func(*query.Parameter) error); ok {
+		r2 = rf(q)
+	} else {
+		r2 = ret.Error(2)
+	}
+
+	return r0, r1, r2
+}
+
+// GetPeriodicExecution provides a mock function with given fields: pID, q
+func (_m *MockManager) GetPeriodicExecution(pID string, q *query.Parameter) ([]*job.Stats, int64, error) {
+	ret := _m.Called(pID, q)
+
+	var r0 []*job.Stats
+	if rf, ok := ret.Get(0).(func(string, *query.Parameter) []*job.Stats); ok {
+		r0 = rf(pID, q)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*job.Stats)
+		}
+	}
+
+	var r1 int64
+	if rf, ok := ret.Get(1).(func(string, *query.Parameter) int64); ok {
+		r1 = rf(pID, q)
+	} else {
+		r1 = ret.Get(1).(int64)
+	}
+
+	var r2 error
+	if rf, ok := ret.Get(2).(func(string, *query.Parameter) error); ok {
+		r2 = rf(pID, q)
+	} else {
+		r2 = ret.Error(2)
+	}
+
+	return r0, r1, r2
+}
+
+// GetScheduledJobs provides a mock function with given fields: q
+func (_m *MockManager) GetScheduledJobs(q *query.Parameter) ([]*job.Stats, int64, error) {
+	ret := _m.Called(q)
+
+	var r0 []*job.Stats
+	if rf, ok := ret.Get(0).(func(*query.Parameter) []*job.Stats); ok {
+		r0 = rf(q)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*job.Stats)
+		}
+	}
+
+	var r1 int64
+	if rf, ok := ret.Get(1).(func(*query.Parameter) int64); ok {
+		r1 = rf(q)
+	} else {
+		r1 = ret.Get(1).(int64)
+	}
+
+	var r2 error
+	if rf, ok := ret.Get(2).(func(*query.Parameter) error); ok {
+		r2 = rf(q)
+	} else {
+		r2 = ret.Error(2)
+	}
+
+	return r0, r1, r2
+}
+
+// SaveJob provides a mock function with given fields: _a0
+func (_m *MockManager) SaveJob(_a0 *job.Stats) error {
+	ret := _m.Called(_a0)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(*job.Stats) error); ok {
+		r0 = rf(_a0)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}

src/jobservice/period/basic_scheduler.go

@@ -16,6 +16,7 @@ package period
 
 import (
 	"context"
+	"math/rand"
 	"time"
 
 	"github.com/goharbor/harbor/src/jobservice/errs"
@@ -86,7 +87,7 @@ func (bs *basicScheduler) Schedule(p *Policy) (int64, error) {
 		return -1, err
 	}
 
-	pid := time.Now().Unix()
+	pid := time.Now().Unix() + rand.Int63n(10)
 
 	// Save to redis db
 	if _, err := conn.Do("ZADD", rds.KeyPeriodicPolicy(bs.namespace), pid, rawJSON); err != nil {

src/jobservice/period/mock.go

@@ -0,0 +1,17 @@
+// Copyright Project Harbor 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 period
+
+//go:generate mockery --name Scheduler --output . --outpkg period --filename mock_scheduler.go --structname MockScheduler --inpackage

src/jobservice/period/mock_scheduler.go

@@ -0,0 +1,50 @@
+// Code generated by mockery v2.1.0. DO NOT EDIT.
+
+package period
+
+import mock "github.com/stretchr/testify/mock"
+
+// MockScheduler is an autogenerated mock type for the Scheduler type
+type MockScheduler struct {
+	mock.Mock
+}
+
+// Schedule provides a mock function with given fields: policy
+func (_m *MockScheduler) Schedule(policy *Policy) (int64, error) {
+	ret := _m.Called(policy)
+
+	var r0 int64
+	if rf, ok := ret.Get(0).(func(*Policy) int64); ok {
+		r0 = rf(policy)
+	} else {
+		r0 = ret.Get(0).(int64)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(*Policy) error); ok {
+		r1 = rf(policy)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// Start provides a mock function with given fields:
+func (_m *MockScheduler) Start() {
+	_m.Called()
+}
+
+// UnSchedule provides a mock function with given fields: policyID
+func (_m *MockScheduler) UnSchedule(policyID string) error {
+	ret := _m.Called(policyID)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(string) error); ok {
+		r0 = rf(policyID)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}

src/jobservice/runtime/bootstrap.go

@@ -19,6 +19,7 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
+	"strings"
 	"sync"
 	"syscall"
 	"time"
@@ -40,6 +41,8 @@ import (
 	"github.com/goharbor/harbor/src/jobservice/logger"
 	"github.com/goharbor/harbor/src/jobservice/mgt"
 	"github.com/goharbor/harbor/src/jobservice/migration"
+	"github.com/goharbor/harbor/src/jobservice/period"
+	sync2 "github.com/goharbor/harbor/src/jobservice/sync"
 	"github.com/goharbor/harbor/src/jobservice/worker"
 	"github.com/goharbor/harbor/src/jobservice/worker/cworker"
 	"github.com/goharbor/harbor/src/lib/errors"
@@ -49,6 +52,7 @@ import (
 	"github.com/goharbor/harbor/src/pkg/retention"
 	"github.com/goharbor/harbor/src/pkg/scan"
 	"github.com/goharbor/harbor/src/pkg/scheduler"
+	"github.com/goharbor/harbor/src/pkg/task"
 	"github.com/gomodule/redigo/redis"
 )
 
@@ -59,7 +63,9 @@ const (
 )
 
 // JobService ...
-var JobService = &Bootstrap{}
+var JobService = &Bootstrap{
+	syncEnabled: true,
+}
 
 // workerPoolID
 var workerPoolID string
@@ -67,6 +73,7 @@ var workerPoolID string
 // Bootstrap is coordinating process to help load and start the other components to serve.
 type Bootstrap struct {
 	jobContextInitializer job.ContextInitializer
+	syncEnabled           bool
 }
 
 // SetJobContextInitializer set the job context initializer
@@ -103,6 +110,7 @@ func (bs *Bootstrap) LoadAndRun(ctx context.Context, cancel context.CancelFunc)
 	var (
 		backendWorker worker.Interface
 		manager       mgt.Manager
+		syncWorker    *sync2.Worker
 	)
 	if cfg.PoolConfig.Backend == config.JobServicePoolBackendRedis {
 		// Number of workers
@@ -175,6 +183,29 @@ func (bs *Bootstrap) LoadAndRun(ctx context.Context, cancel context.CancelFunc)
 		if err = lcmCtl.Serve(); err != nil {
 			return errors.Errorf("start life cycle controller error: %s", err)
 		}
+
+		// Initialize sync worker
+		if bs.syncEnabled {
+			syncWorker = sync2.New(3).
+				WithContext(rootContext).
+				UseManager(manager).
+				UseScheduler(period.NewScheduler(rootContext.SystemContext, namespace, redisPool, lcmCtl)).
+				WithCoreInternalAddr(strings.TrimSuffix(config.GetCoreURL(), "/")).
+				UseCoreScheduler(scheduler.Sched).
+				UseCoreExecutionManager(task.ExecMgr).
+				UseCoreTaskManager(task.Mgr).
+				WithPolicyLoader(func() ([]*period.Policy, error) {
+					conn := redisPool.Get()
+					defer conn.Close()
+
+					return period.Load(namespace, conn)
+				})
+			// Start sync worker
+			// Not block the regular process.
+			if err := syncWorker.Start(); err != nil {
+				logger.Error(err)
+			}
+		}
 	} else {
 		return errors.Errorf("worker backend '%s' is not supported", cfg.PoolConfig.Backend)
 	}
@@ -225,7 +256,7 @@ func (bs *Bootstrap) LoadAndRun(ctx context.Context, cancel context.CancelFunc)
 		sig <- os.Interrupt
 	}
 
-	// Wait everyone exit
+	// Wait everyone exits.
 	rootContext.WG.Wait()
 
 	return

src/jobservice/runtime/bootstrap_test.go

@@ -17,14 +17,16 @@ package runtime
 import (
 	"context"
 	"fmt"
+	"testing"
+	"time"
+
+	"github.com/goharbor/harbor/src/common/dao"
 	"github.com/goharbor/harbor/src/jobservice/common/utils"
 	"github.com/goharbor/harbor/src/jobservice/config"
 	"github.com/goharbor/harbor/src/jobservice/logger"
 	"github.com/goharbor/harbor/src/jobservice/tests"
 	"github.com/stretchr/testify/require"
 	"github.com/stretchr/testify/suite"
-	"testing"
-	"time"
 )
 
 // BootStrapTestSuite tests bootstrap
@@ -38,6 +40,8 @@ type BootStrapTestSuite struct {
 
 // SetupSuite prepares test suite
 func (suite *BootStrapTestSuite) SetupSuite() {
+	dao.PrepareTestForPostgresSQL()
+
 	// Load configurations
 	err := config.DefaultConfig.Load("../config_test.yml", true)
 	require.NoError(suite.T(), err, "load configurations error: %s", err)
@@ -51,7 +55,9 @@ func (suite *BootStrapTestSuite) SetupSuite() {
 	err = logger.Init(suite.ctx)
 	require.NoError(suite.T(), err, "init logger: nil error expected but got %s", err)
 
-	suite.jobService = &Bootstrap{}
+	suite.jobService = &Bootstrap{
+		syncEnabled: false,
+	}
 	suite.jobService.SetJobContextInitializer(nil)
 }
 

src/jobservice/sync/schedule.go

@@ -0,0 +1,368 @@
+// Copyright Project Harbor 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 sync
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	o "github.com/astaxie/beego/orm"
+	"github.com/goharbor/harbor/src/jobservice/env"
+	"github.com/goharbor/harbor/src/jobservice/job"
+	"github.com/goharbor/harbor/src/jobservice/logger"
+	"github.com/goharbor/harbor/src/jobservice/mgt"
+	"github.com/goharbor/harbor/src/jobservice/period"
+	"github.com/goharbor/harbor/src/lib/errors"
+	"github.com/goharbor/harbor/src/lib/orm"
+	"github.com/goharbor/harbor/src/lib/q"
+	"github.com/goharbor/harbor/src/pkg/scheduler"
+	"github.com/goharbor/harbor/src/pkg/task"
+)
+
+// PolicyLoader is a func template to load schedule policies from js datastore.
+type PolicyLoader func() ([]*period.Policy, error)
+
+// Worker is designed to sync the schedules in the database into jobservice datastore.
+type Worker struct {
+	// context of Worker.
+	context *env.Context
+	// Indicate whether a new round should be run.
+	lastErr error
+	// How many rounds have been run.
+	round uint8
+	// The max number of rounds for repeated runs.
+	maxRounds uint8
+	// Periodical job scheduler.
+	scheduler period.Scheduler
+	// Job stats manager.
+	manager mgt.Manager
+	// Internal addr of core.
+	internalCoreAddr string
+	// Scheduler from core.
+	coreScheduler scheduler.Scheduler
+	// Execution manager from core.
+	coreExecutionManager task.ExecutionManager
+	// Task manager from core
+	coreTaskManager task.Manager
+	// Loader for loading polices from the js store.
+	policyLoader PolicyLoader
+}
+
+// New sync worker.
+func New(maxRounds uint8) *Worker {
+	return &Worker{
+		maxRounds: maxRounds,
+	}
+}
+
+// WithContext set context.
+func (w *Worker) WithContext(ctx *env.Context) *Worker {
+	w.context = ctx
+	return w
+}
+
+// UseScheduler refers the period.Scheduler.
+func (w *Worker) UseScheduler(scheduler period.Scheduler) *Worker {
+	w.scheduler = scheduler
+	return w
+}
+
+// WithCoreInternalAddr sets the internal addr of core.
+func (w *Worker) WithCoreInternalAddr(addr string) *Worker {
+	w.internalCoreAddr = addr
+	return w
+}
+
+// UseManager refers the mgt.Manager.
+func (w *Worker) UseManager(mgr mgt.Manager) *Worker {
+	w.manager = mgr
+	return w
+}
+
+// UseCoreScheduler refers the core scheduler.
+func (w *Worker) UseCoreScheduler(scheduler scheduler.Scheduler) *Worker {
+	w.coreScheduler = scheduler
+	return w
+}
+
+// UseCoreExecutionManager refers the core execution manager.
+func (w *Worker) UseCoreExecutionManager(executionMgr task.ExecutionManager) *Worker {
+	w.coreExecutionManager = executionMgr
+	return w
+}
+
+// UseCoreTaskManager refers the core task manager.
+func (w *Worker) UseCoreTaskManager(taskManager task.Manager) *Worker {
+	w.coreTaskManager = taskManager
+	return w
+}
+
+// WithPolicyLoader determines the policy loader func.
+func (w *Worker) WithPolicyLoader(loader PolicyLoader) *Worker {
+	w.policyLoader = loader
+	return w
+}
+
+// Start the loop in none-blocking way.
+func (w *Worker) Start() error {
+	if err := w.validate(); err != nil {
+		return err
+	}
+
+	w.context.WG.Add(1)
+	// Run
+	go func() {
+		defer func() {
+			w.context.WG.Done()
+		}()
+
+		ctx := orm.NewContext(w.context.SystemContext, o.NewOrm())
+		ctlChan := make(chan struct{}, 1)
+		ctlChan <- struct{}{}
+
+		for {
+			select {
+			case <-ctlChan:
+				w.round++
+				if w.round == w.maxRounds {
+					return
+				}
+
+				if err := w.Run(ctx); err == nil {
+					return
+				}
+
+				// Wait for a while and retry then.
+				time.AfterFunc(1*time.Minute, func() {
+					ctlChan <- struct{}{}
+				})
+			case <-w.context.SystemContext.Done():
+				logger.Info("Context cancel signal received:sync worker exit")
+				return
+			}
+		}
+	}()
+
+	return nil
+}
+
+// Run one round.
+func (w *Worker) Run(ctx context.Context) error {
+	// Start sync schedules.
+	logger.Infof("Start to sync schedules in database to jobservice: round[%d].", w.round)
+
+	// Get all the schedules from the database first.
+	// Use the default scheduler.
+	schedules, err := w.coreScheduler.ListSchedules(ctx, &q.Query{})
+	if err != nil {
+		// We can not proceed.
+		// A non-nil error will cause a follow-up retry later.
+		return errors.Wrap(err, "list all the schedules in the database")
+	}
+
+	// Exit earlier if no schedules found.
+	if len(schedules) == 0 {
+		// Log and gracefully exit.
+		logger.Info("No schedules found in the database.")
+		return nil
+	}
+
+	// Get schedule records from the jobservice datastore.
+	polices, err := w.policyLoader()
+	if err != nil {
+		return errors.Wrap(err, "load schedule records from jobservice store")
+	}
+
+	// Define a function to get the policy with the specified ID.
+	getPolicy := func(jobID string) *period.Policy {
+		for _, p := range polices {
+			if p.ID == jobID {
+				return p
+			}
+		}
+
+		return nil
+	}
+
+	jobHash := make(map[string]struct{})
+	restoreCounter := 0
+	clearCounter := 0
+
+	// Sync now.
+	for _, sch := range schedules {
+		// Get the corresponding task.
+		t, err := w.getTask(ctx, sch)
+		if err != nil {
+			// Log and skip
+			logger.Error(err)
+			w.lastErr = err
+
+			continue
+		}
+
+		// Recorded
+		jobHash[t.JobID] = struct{}{}
+
+		// Get policy
+		p := getPolicy(t.JobID)
+		if p == nil {
+			// Need to restore this missing schedule.
+			if err := w.restore(sch.CRON, t); err != nil {
+				// Log and skip
+				logger.Error(err)
+				w.lastErr = err
+			} else {
+				restoreCounter++
+				logger.Infof("Sync: restore missing schedule: taskID=%d, jobID=%s, cron=%s", t.ID, t.JobID, sch.CRON)
+			}
+		}
+	}
+
+	// Clear the dirty ones.
+	for _, p := range polices {
+		_, ok := jobHash[p.ID]
+		if p.JobName == scheduler.JobNameScheduler && !ok {
+			if err := w.scheduler.UnSchedule(p.ID); err != nil {
+				logger.Error(err)
+			} else {
+				clearCounter++
+				logger.Infof("Sync: unschedule dirty schedule: %s:%s", p.JobName, p.ID)
+			}
+		}
+	}
+
+	logger.Infof("End sync schedules in database to jobservice: round[%d].", w.round)
+	logger.Infof("Found %d schedules, restore %d missing schedules, clear %d dirty schedules", len(schedules), restoreCounter, clearCounter)
+
+	return w.lastErr
+}
+
+func (w *Worker) restore(cron string, t *task.Task) error {
+	p := &period.Policy{
+		ID:         t.JobID,
+		JobName:    scheduler.JobNameScheduler,
+		CronSpec:   cron,
+		WebHookURL: fmt.Sprintf("%s/service/notifications/tasks/%d", w.internalCoreAddr, t.ID),
+	}
+
+	// Schedule the policy.
+	numericID, err := w.scheduler.Schedule(p)
+	if err != nil {
+		return errors.Wrap(err, "schedule policy")
+	}
+
+	res := &job.Stats{
+		Info: &job.StatsInfo{
+			JobID:       p.ID,
+			JobName:     p.JobName,
+			Status:      job.ScheduledStatus.String(),
+			JobKind:     job.KindPeriodic,
+			CronSpec:    cron,
+			WebHookURL:  p.WebHookURL,
+			NumericPID:  numericID,
+			EnqueueTime: time.Now().Unix(),
+			UpdateTime:  time.Now().Unix(),
+			RefLink:     fmt.Sprintf("/api/v1/jobs/%s", p.ID),
+			Revision:    t.StatusRevision,
+		},
+	}
+
+	// Keep status synced.
+	if res.Info.Revision > 0 {
+		res.Info.HookAck = &job.ACK{
+			Revision: t.StatusRevision,
+			Status:   job.ScheduledStatus.String(),
+		}
+	}
+
+	// Save the stats.
+	return w.manager.SaveJob(res)
+}
+
+// validate whether the worker is ready or not.
+func (w *Worker) validate() error {
+	if w.context == nil {
+		return errors.New("missing context")
+	}
+
+	if w.manager == nil {
+		return errors.New("missing stats manager")
+	}
+
+	if w.scheduler == nil {
+		return errors.New("missing period scheduler")
+	}
+
+	if len(w.internalCoreAddr) == 0 {
+		return errors.New("empty internal addr of core")
+	}
+
+	if w.coreScheduler == nil {
+		return errors.New("missing core scheduler")
+	}
+
+	if w.coreExecutionManager == nil {
+		return errors.New("missing core execution manager")
+	}
+
+	if w.coreTaskManager == nil {
+		return errors.New("missing core task manager")
+	}
+
+	if w.policyLoader == nil {
+		return errors.New("missing policy loader")
+	}
+
+	return nil
+}
+
+// getTask gets the task associated with the specified schedule.
+// Here is an assumption that each schedule has only one execution as well as only one task under the execution.
+func (w *Worker) getTask(ctx context.Context, schedule *scheduler.Schedule) (*task.Task, error) {
+	// Get associated execution first.
+	executions, err := w.coreExecutionManager.List(ctx, &q.Query{
+		Keywords: map[string]interface{}{
+			"vendor_type": scheduler.JobNameScheduler,
+			"vendor_id":   schedule.ID,
+		},
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	if len(executions) == 0 {
+		return nil, errors.Errorf("no execution found for schedule: %s:%d", schedule.VendorType, schedule.VendorID)
+	}
+
+	theOne := executions[0]
+	// Now get the execution.
+	tasks, err := w.coreTaskManager.List(ctx, &q.Query{
+		Keywords: map[string]interface{}{
+			"execution_id": theOne.ID,
+		},
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	if len(tasks) == 0 {
+		return nil, errors.Errorf("no task found for execution: %s:%d", schedule.VendorType, theOne.ID)
+	}
+
+	return tasks[0], nil
+}

src/jobservice/sync/schedule_test.go

@@ -0,0 +1,138 @@
+// Copyright Project Harbor 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 sync
+
+import (
+	"context"
+	"sync"
+	"testing"
+
+	"github.com/goharbor/harbor/src/common/dao"
+	"github.com/goharbor/harbor/src/jobservice/env"
+	"github.com/goharbor/harbor/src/jobservice/mgt"
+	"github.com/goharbor/harbor/src/jobservice/period"
+	"github.com/goharbor/harbor/src/lib/q"
+	"github.com/goharbor/harbor/src/pkg/scheduler"
+	"github.com/goharbor/harbor/src/pkg/task"
+	"github.com/goharbor/harbor/src/testing/mock"
+	ts "github.com/goharbor/harbor/src/testing/pkg/scheduler"
+	tt "github.com/goharbor/harbor/src/testing/pkg/task"
+	"github.com/stretchr/testify/suite"
+)
+
+// WorkerTestSuite is test suite for testing sync.Worker.
+type WorkerTestSuite struct {
+	suite.Suite
+
+	worker *Worker
+}
+
+// TestWorker is the entry method of WorkerTestSuite.
+func TestWorker(t *testing.T) {
+	suite.Run(t, &WorkerTestSuite{})
+}
+
+// SetupSuite sets up suite.
+func (suite *WorkerTestSuite) SetupSuite() {
+	sysContext := context.TODO()
+
+	dao.PrepareTestForPostgresSQL()
+
+	getPolicies := func() ([]*period.Policy, error) {
+		return []*period.Policy{
+			// Dirty data in js datastore.
+			{
+				ID:         "8ff2aabb977077b84b4d5f1b",
+				JobName:    scheduler.JobNameScheduler,
+				CronSpec:   "0 0 0 * * 0",
+				WebHookURL: "http://core:8080/service/notifications/tasks/250",
+				NumericID:  1630667250,
+			},
+		}, nil
+	}
+
+	// Mock methods
+	//
+	tss := &ts.Scheduler{}
+	tss.On("ListSchedules", mock.Anything, mock.Anything).Return([]*scheduler.Schedule{
+		{
+			ID:   550,
+			CRON: "0 0 0 * * *",
+		},
+	}, nil)
+
+	// The missing schedule in database.
+	tte := &tt.ExecutionManager{}
+	tte.On("List", mock.Anything, &q.Query{
+		Keywords: map[string]interface{}{
+			"vendor_type": scheduler.JobNameScheduler,
+			"vendor_id":   (int64)(550),
+		},
+	}).Return([]*task.Execution{
+		{
+			ID: 1550,
+		},
+	}, nil)
+
+	ttm := &tt.Manager{}
+	ttm.On("List", mock.Anything, &q.Query{
+		Keywords: map[string]interface{}{
+			"execution_id": (int64)(1550),
+		},
+	}).Return([]*task.Task{
+		{
+			ID:          2550,
+			ExecutionID: 1550,
+			JobID:       "f754ccdd123664b2acb971d9",
+		},
+	}, nil)
+
+	pms := &period.MockScheduler{}
+	pms.On("Schedule", &period.Policy{
+		ID:         "f754ccdd123664b2acb971d9",
+		JobName:    scheduler.JobNameScheduler,
+		CronSpec:   "0 0 0 * * *",
+		WebHookURL: "http://core:8080/service/notifications/tasks/2550",
+	}).Return((int64)(1630667500), nil)
+	pms.On("UnSchedule", "8ff2aabb977077b84b4d5f1b").Return(nil)
+
+	mmm := &mgt.MockManager{}
+	mmm.On("SaveJob", mock.Anything).Return(nil)
+
+	suite.worker = New(3).
+		WithContext(&env.Context{
+			SystemContext: sysContext,
+			WG:            &sync.WaitGroup{},
+			ErrorChan:     make(chan error, 1),
+		}).UseCoreScheduler(tss).
+		UseCoreExecutionManager(tte).
+		UseCoreTaskManager(ttm).
+		UseScheduler(pms).
+		UseManager(mmm).
+		WithCoreInternalAddr("http://core:8080").
+		WithPolicyLoader(getPolicies)
+}
+
+// TestStart test Start().
+func (suite *WorkerTestSuite) TestStart() {
+	err := suite.worker.Start()
+	suite.NoError(err, "start worker")
+}
+
+// TestRun test Run().
+func (suite *WorkerTestSuite) TestRun() {
+	err := suite.worker.Run(context.TODO())
+	suite.NoError(err, "run worker")
+}

src/pkg/task/model.go

@@ -82,9 +82,10 @@ type Task struct {
 	// the time that the task record created
 	CreationTime time.Time `json:"creation_time"`
 	// the time that the underlying job starts
-	StartTime  time.Time `json:"start_time"`
-	UpdateTime time.Time `json:"update_time"`
-	EndTime    time.Time `json:"end_time"`
+	StartTime      time.Time `json:"start_time"`
+	UpdateTime     time.Time `json:"update_time"`
+	EndTime        time.Time `json:"end_time"`
+	StatusRevision int64     `json:"status_revision"`
 }
 
 // From constructs a task from DAO model
@@ -100,6 +101,7 @@ func (t *Task) From(task *dao.Task) {
 	t.StartTime = task.StartTime
 	t.UpdateTime = task.UpdateTime
 	t.EndTime = task.EndTime
+	t.StatusRevision = task.StatusRevision
 	if len(task.ExtraAttrs) > 0 {
 		extras := map[string]interface{}{}
 		if err := json.Unmarshal([]byte(task.ExtraAttrs), &extras); err != nil {