// WaitForCluster waits until node observes that the cluster wide config is
// committed to raft. This ensures that we can see and serve informations
// related to the cluster.
func WaitForCluster(ctx context.Context, n *Node) (cluster *api.Cluster, err error) {
watch, cancel := state.Watch(n.MemoryStore().WatchQueue(), state.EventCreateCluster{})
defer cancel()
var clusters []*api.Cluster
n.MemoryStore().View(func(readTx store.ReadTx) {
clusters, err = store.FindClusters(readTx, store.ByName(store.DefaultClusterName))
})
if err != nil {
return nil, err
}
if len(clusters) == 1 {
cluster = clusters[0]
} else {
select {
case e := <-watch:
cluster = e.(state.EventCreateCluster).Cluster
case <-ctx.Done():
return nil, ctx.Err()
}
}
return cluster, nil
}
func TestRemoveTask(t *testing.T) {
store := store.NewMemoryStore(nil)
assert.NotNil(t, store)
defer store.Close()
watch, cancel := state.Watch(store.WatchQueue() /*state.EventCreateTask{}, state.EventUpdateTask{}*/)
defer cancel()
SetupCluster(t, store)
// get the task
observedTask1 := watchTaskCreate(t, watch)
assert.Equal(t, observedTask1.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask1.ServiceAnnotations.Name, "name1")
assert.Equal(t, observedTask1.NodeID, "id1")
// delete the task
deleteTask(t, store, observedTask1)
// the task should be recreated
observedTask2 := watchTaskCreate(t, watch)
assert.Equal(t, observedTask2.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask2.ServiceAnnotations.Name, "name1")
assert.Equal(t, observedTask2.NodeID, "id1")
}
// Run is the ConstraintEnforcer's main loop.
func (ce *ConstraintEnforcer) Run() {
defer close(ce.doneChan)
watcher, cancelWatch := state.Watch(ce.store.WatchQueue(), state.EventUpdateNode{})
defer cancelWatch()
var (
nodes []*api.Node
err error
)
ce.store.View(func(readTx store.ReadTx) {
nodes, err = store.FindNodes(readTx, store.All)
})
if err != nil {
log.L.WithError(err).Error("failed to check nodes for noncompliant tasks")
} else {
for _, node := range nodes {
ce.shutdownNoncompliantTasks(node)
}
}
for {
select {
case event := <-watcher:
node := event.(state.EventUpdateNode).Node
ce.shutdownNoncompliantTasks(node)
case <-ce.stopChan:
return
}
}
}
func TestGetRemoteSignedCertificateWithPending(t *testing.T) {
tc := testutils.NewTestCA(t)
defer tc.Stop()
// Create a new CSR to be signed
csr, _, err := ca.GenerateAndWriteNewKey(tc.Paths.Node)
assert.NoError(t, err)
updates, cancel := state.Watch(tc.MemoryStore.WatchQueue(), state.EventCreateNode{})
defer cancel()
completed := make(chan error)
go func() {
_, err := ca.GetRemoteSignedCertificate(context.Background(), csr, tc.WorkerToken, tc.RootCA.Pool, tc.Remotes, nil, nil)
completed <- err
}()
event := <-updates
node := event.(state.EventCreateNode).Node.Copy()
// Directly update the status of the store
err = tc.MemoryStore.Update(func(tx store.Tx) error {
node.Certificate.Status.State = api.IssuanceStateIssued
return store.UpdateNode(tx, node)
})
assert.NoError(t, err)
// Make sure GetRemoteSignedCertificate didn't return an error
assert.NoError(t, <-completed)
}
func TestNodeAvailability(t *testing.T) {
store := store.NewMemoryStore(nil)
assert.NotNil(t, store)
defer store.Close()
SetupCluster(t, store)
watch, cancel := state.Watch(store.WatchQueue())
defer cancel()
skipEvents(t, watch)
node1.Status.State = api.NodeStatus_READY
node1.Spec.Availability = api.NodeAvailabilityActive
// set node1 to drain
updateNodeAvailability(t, store, node1, api.NodeAvailabilityDrain)
// task should be set to dead
observedTask1 := watchShutdownTask(t, watch)
assert.Equal(t, observedTask1.ServiceAnnotations.Name, "name1")
assert.Equal(t, observedTask1.NodeID, "id1")
// set node1 to active
updateNodeAvailability(t, store, node1, api.NodeAvailabilityActive)
// task should be added back
observedTask2 := watchTaskCreate(t, watch)
assert.Equal(t, observedTask2.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask2.ServiceAnnotations.Name, "name1")
assert.Equal(t, observedTask2.NodeID, "id1")
}
func TestSchedulerNoReadyNodes(t *testing.T) {
ctx := context.Background()
initialTask := &api.Task{
ID: "id1",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name1",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
err := s.Update(func(tx store.Tx) error {
// Add initial task
assert.NoError(t, store.CreateTask(tx, initialTask))
return nil
})
assert.NoError(t, err)
scheduler := New(s)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
go func() {
assert.NoError(t, scheduler.Run(ctx))
}()
defer scheduler.Stop()
failure := watchAssignmentFailure(t, watch)
assert.Equal(t, "no suitable node", failure.Status.Message)
err = s.Update(func(tx store.Tx) error {
// Create a ready node. The task should get assigned to this
// node.
node := &api.Node{
ID: "newnode",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "newnode",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
}
assert.NoError(t, store.CreateNode(tx, node))
return nil
})
assert.NoError(t, err)
assignment := watchAssignment(t, watch)
assert.Equal(t, "newnode", assignment.NodeID)
}
func (u *Updater) updateTask(ctx context.Context, slot slot, updated *api.Task) error {
// Kick off the watch before even creating the updated task. This is in order to avoid missing any event.
taskUpdates, cancel := state.Watch(u.watchQueue, state.EventUpdateTask{
Task: &api.Task{ID: updated.ID},
Checks: []state.TaskCheckFunc{state.TaskCheckID},
})
defer cancel()
var delayStartCh <-chan struct{}
// Atomically create the updated task and bring down the old one.
_, err := u.store.Batch(func(batch *store.Batch) error {
err := batch.Update(func(tx store.Tx) error {
if err := store.CreateTask(tx, updated); err != nil {
return err
}
return nil
})
if err != nil {
return err
}
u.removeOldTasks(ctx, batch, slot)
for _, t := range slot {
if t.DesiredState == api.TaskStateRunning {
// Wait for the old task to stop or time out, and then set the new one
// to RUNNING.
delayStartCh = u.restarts.DelayStart(ctx, nil, t, updated.ID, 0, true)
break
}
}
return nil
})
if err != nil {
return err
}
if delayStartCh != nil {
<-delayStartCh
}
// Wait for the new task to come up.
// TODO(aluzzardi): Consider adding a timeout here.
for {
select {
case e := <-taskUpdates:
updated = e.(state.EventUpdateTask).Task
if updated.Status.State >= api.TaskStateRunning {
return nil
}
case <-u.stopChan:
return nil
}
}
}
func (u *Updater) updateTask(ctx context.Context, original, updated *api.Task) error {
log.G(ctx).Debugf("replacing %s with %s", original.ID, updated.ID)
// Kick off the watch before even creating the updated task. This is in order to avoid missing any event.
taskUpdates, cancel := state.Watch(u.watchQueue, state.EventUpdateTask{
Task: &api.Task{ID: updated.ID},
Checks: []state.TaskCheckFunc{state.TaskCheckID},
})
defer cancel()
var delayStartCh <-chan struct{}
// Atomically create the updated task and bring down the old one.
err := u.store.Update(func(tx store.Tx) error {
t := store.GetTask(tx, original.ID)
if t == nil {
return fmt.Errorf("task %s not found while trying to update it", original.ID)
}
if t.DesiredState > api.TaskStateRunning {
return fmt.Errorf("task %s was already shut down when reached by updater", original.ID)
}
t.DesiredState = api.TaskStateShutdown
if err := store.UpdateTask(tx, t); err != nil {
return err
}
if err := store.CreateTask(tx, updated); err != nil {
return err
}
// Wait for the old task to stop or time out, and then set the new one
// to RUNNING.
delayStartCh = u.restarts.DelayStart(ctx, tx, original, updated.ID, 0, true)
return nil
})
if err != nil {
return err
}
<-delayStartCh
// Wait for the new task to come up.
// TODO(aluzzardi): Consider adding a timeout here.
for {
select {
case e := <-taskUpdates:
updated = e.(state.EventUpdateTask).Task
if updated.Status.State >= api.TaskStateRunning {
return nil
}
case <-u.stopChan:
return nil
}
}
}
// NewTaskReaper creates a new TaskReaper.
func NewTaskReaper(store *store.MemoryStore) *TaskReaper {
watcher, cancel := state.Watch(store.WatchQueue(), state.EventCreateTask{}, state.EventUpdateCluster{})
return &TaskReaper{
store: store,
watcher: watcher,
cancelWatch: cancel,
dirty: make(map[instanceTuple]struct{}),
stopChan: make(chan struct{}),
doneChan: make(chan struct{}),
}
}
func (s *subscription) Run(ctx context.Context) {
s.ctx, s.cancel = context.WithCancel(ctx)
if s.follow() {
wq := s.store.WatchQueue()
ch, cancel := state.Watch(wq, state.EventCreateTask{}, state.EventUpdateTask{})
go func() {
defer cancel()
s.watch(ch)
}()
}
s.match()
}
func TestSetup(t *testing.T) {
store := store.NewMemoryStore(nil)
assert.NotNil(t, store)
defer store.Close()
watch, cancel := state.Watch(store.WatchQueue() /*state.EventCreateTask{}, state.EventUpdateTask{}*/)
defer cancel()
observedTask1 := SetupCluster(t, store, watch)
assert.Equal(t, observedTask1.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask1.ServiceAnnotations.Name, "name1")
assert.Equal(t, observedTask1.NodeID, "id1")
}
func TestAddNode(t *testing.T) {
store := store.NewMemoryStore(nil)
assert.NotNil(t, store)
defer store.Close()
watch, cancel := state.Watch(store.WatchQueue())
defer cancel()
SetupCluster(t, store, watch)
addNode(t, store, node2)
observedTask2 := testutils.WatchTaskCreate(t, watch)
assert.Equal(t, observedTask2.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask2.ServiceAnnotations.Name, "name1")
assert.Equal(t, observedTask2.NodeID, "id2")
}
func TestDeleteService(t *testing.T) {
store := store.NewMemoryStore(nil)
assert.NotNil(t, store)
defer store.Close()
watch, cancel := state.Watch(store.WatchQueue())
defer cancel()
SetupCluster(t, store, watch)
deleteService(t, store, service1)
// task should be deleted
observedTask := testutils.WatchTaskDelete(t, watch)
assert.Equal(t, observedTask.ServiceAnnotations.Name, "name1")
assert.Equal(t, observedTask.NodeID, "id1")
}
func TestDeleteNode(t *testing.T) {
store := store.NewMemoryStore(nil)
assert.NotNil(t, store)
SetupCluster(t, store)
watch, cancel := state.Watch(store.WatchQueue())
defer cancel()
skipEvents(t, watch)
deleteNode(t, store, node1)
// task should be set to dead
observedTask := watchShutdownTask(t, watch)
assert.Equal(t, observedTask.ServiceAnnotations.Name, "name1")
assert.Equal(t, observedTask.NodeID, "id1")
}
func TestAddService(t *testing.T) {
store := store.NewMemoryStore(nil)
assert.NotNil(t, store)
SetupCluster(t, store)
watch, cancel := state.Watch(store.WatchQueue())
defer cancel()
skipEvents(t, watch)
addService(t, store, service2)
observedTask := watchTaskCreate(t, watch)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.ServiceAnnotations.Name, "name2")
assert.True(t, observedTask.NodeID == "id1")
}
// ViewAndWatch calls a callback which can observe the state of this
// MemoryStore. It also returns a channel that will return further events from
// this point so the snapshot can be kept up to date. The watch channel must be
// released with watch.StopWatch when it is no longer needed. The channel is
// guaranteed to get all events after the moment of the snapshot, and only
// those events.
func ViewAndWatch(store *MemoryStore, cb func(ReadTx) error, specifiers ...state.Event) (watch chan events.Event, cancel func(), err error) {
// Using Update to lock the store and guarantee consistency between
// the watcher and the the state seen by the callback. snapshotReadTx
// exposes this Tx as a ReadTx so the callback can't modify it.
err = store.Update(func(tx Tx) error {
if err := cb(tx); err != nil {
return err
}
watch, cancel = state.Watch(store.WatchQueue(), specifiers...)
return nil
})
if watch != nil && err != nil {
cancel()
cancel = nil
watch = nil
}
return
}
func TestSchedulerFaultyNode(t *testing.T) {
ctx := context.Background()
taskTemplate := &api.Task{
ServiceID: "service1",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name1",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
node1 := &api.Node{
ID: "id1",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "id1",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
}
node2 := &api.Node{
ID: "id2",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "id2",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
}
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
err := s.Update(func(tx store.Tx) error {
// Add initial nodes, and one task assigned to node id1
assert.NoError(t, store.CreateNode(tx, node1))
assert.NoError(t, store.CreateNode(tx, node2))
task1 := taskTemplate.Copy()
task1.ID = "id1"
task1.NodeID = "id1"
task1.Status.State = api.TaskStateRunning
assert.NoError(t, store.CreateTask(tx, task1))
return nil
})
assert.NoError(t, err)
scheduler := New(s)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
go func() {
assert.NoError(t, scheduler.Run(ctx))
}()
defer scheduler.Stop()
for i := 0; i != 8; i++ {
// Simulate a task failure cycle
newTask := taskTemplate.Copy()
newTask.ID = identity.NewID()
err = s.Update(func(tx store.Tx) error {
assert.NoError(t, store.CreateTask(tx, newTask))
return nil
})
assert.NoError(t, err)
assignment := watchAssignment(t, watch)
assert.Equal(t, newTask.ID, assignment.ID)
if i < 5 {
// The first 5 attempts should be assigned to node id2 because
// it has no replicas of the service.
assert.Equal(t, "id2", assignment.NodeID)
} else {
// The next ones should be assigned to id1, since we'll
// flag id2 as potentially faulty.
assert.Equal(t, "id1", assignment.NodeID)
}
err = s.Update(func(tx store.Tx) error {
newTask := store.GetTask(tx, newTask.ID)
require.NotNil(t, newTask)
newTask.Status.State = api.TaskStateFailed
assert.NoError(t, store.UpdateTask(tx, newTask))
return nil
})
assert.NoError(t, err)
}
}
func benchScheduler(b *testing.B, nodes, tasks int, networkConstraints bool) {
ctx := context.Background()
for iters := 0; iters < b.N; iters++ {
b.StopTimer()
s := store.NewMemoryStore(nil)
scheduler := New(s)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
go func() {
_ = scheduler.Run(ctx)
}()
// Let the scheduler get started
runtime.Gosched()
_ = s.Update(func(tx store.Tx) error {
// Create initial nodes and tasks
for i := 0; i < nodes; i++ {
n := &api.Node{
ID: identity.NewID(),
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name" + strconv.Itoa(i),
Labels: make(map[string]string),
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
Description: &api.NodeDescription{
Engine: &api.EngineDescription{},
},
}
// Give every third node a special network
if i%3 == 0 {
n.Description.Engine.Plugins = []api.PluginDescription{
{
Name: "network",
Type: "Network",
},
}
}
err := store.CreateNode(tx, n)
if err != nil {
panic(err)
}
}
for i := 0; i < tasks; i++ {
id := "task" + strconv.Itoa(i)
t := &api.Task{
ID: id,
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: id,
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
if networkConstraints {
t.Networks = []*api.NetworkAttachment{
{
Network: &api.Network{
DriverState: &api.Driver{
Name: "network",
},
},
},
}
}
err := store.CreateTask(tx, t)
if err != nil {
panic(err)
}
}
b.StartTimer()
return nil
})
for i := 0; i != tasks; i++ {
<-watch
}
scheduler.Stop()
cancel()
s.Close()
}
}
func TestDrain(t *testing.T) {
ctx := context.Background()
initialService := &api.Service{
ID: "id1",
Spec: api.ServiceSpec{
Annotations: api.Annotations{
Name: "name1",
},
Task: api.TaskSpec{
Runtime: &api.TaskSpec_Container{
Container: &api.ContainerSpec{},
},
Restart: &api.RestartPolicy{
Condition: api.RestartOnNone,
},
},
Mode: &api.ServiceSpec_Replicated{
Replicated: &api.ReplicatedService{
Replicas: 6,
},
},
},
}
initialNodeSet := []*api.Node{
{
ID: "id1",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name1",
},
Availability: api.NodeAvailabilityActive,
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
{
ID: "id2",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name2",
},
Availability: api.NodeAvailabilityActive,
},
Status: api.NodeStatus{
State: api.NodeStatus_DOWN,
},
},
// We should NOT kick out tasks on UNKNOWN nodes.
{
ID: "id3",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name3",
},
Availability: api.NodeAvailabilityActive,
},
Status: api.NodeStatus{
State: api.NodeStatus_UNKNOWN,
},
},
{
ID: "id4",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name4",
},
Availability: api.NodeAvailabilityPause,
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
{
ID: "id5",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name5",
},
Availability: api.NodeAvailabilityDrain,
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
}
initialTaskSet := []*api.Task{
// Task not assigned to any node
{
ID: "id0",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
Slot: 1,
ServiceAnnotations: api.Annotations{
Name: "name0",
},
ServiceID: "id1",
},
// Tasks assigned to the nodes defined above
{
ID: "id1",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
Slot: 2,
ServiceAnnotations: api.Annotations{
Name: "name1",
},
ServiceID: "id1",
NodeID: "id1",
},
{
ID: "id2",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
Slot: 3,
ServiceAnnotations: api.Annotations{
Name: "name2",
},
ServiceID: "id1",
NodeID: "id2",
},
{
ID: "id3",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
Slot: 4,
ServiceAnnotations: api.Annotations{
Name: "name3",
},
ServiceID: "id1",
NodeID: "id3",
},
{
ID: "id4",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
Slot: 5,
ServiceAnnotations: api.Annotations{
Name: "name4",
},
ServiceID: "id1",
NodeID: "id4",
},
{
ID: "id5",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
Slot: 6,
ServiceAnnotations: api.Annotations{
Name: "name5",
},
ServiceID: "id1",
NodeID: "id5",
},
}
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
err := s.Update(func(tx store.Tx) error {
// Prepopulate service
assert.NoError(t, store.CreateService(tx, initialService))
// Prepoulate nodes
for _, n := range initialNodeSet {
assert.NoError(t, store.CreateNode(tx, n))
}
// Prepopulate tasks
for _, task := range initialTaskSet {
assert.NoError(t, store.CreateTask(tx, task))
}
return nil
})
assert.NoError(t, err)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
orchestrator := NewReplicatedOrchestrator(s)
defer orchestrator.Stop()
go func() {
assert.NoError(t, orchestrator.Run(ctx))
}()
// id2 and id5 should be killed immediately
deletion1 := watchShutdownTask(t, watch)
deletion2 := watchShutdownTask(t, watch)
assert.Regexp(t, "id(2|5)", deletion1.ID)
assert.Regexp(t, "id(2|5)", deletion1.NodeID)
assert.Regexp(t, "id(2|5)", deletion2.ID)
assert.Regexp(t, "id(2|5)", deletion2.NodeID)
// Create a new task, assigned to node id2
err = s.Update(func(tx store.Tx) error {
task := initialTaskSet[2].Copy()
task.ID = "newtask"
task.NodeID = "id2"
assert.NoError(t, store.CreateTask(tx, task))
return nil
})
assert.NoError(t, err)
deletion3 := watchShutdownTask(t, watch)
assert.Equal(t, "newtask", deletion3.ID)
assert.Equal(t, "id2", deletion3.NodeID)
// Set node id4 to the DRAINED state
err = s.Update(func(tx store.Tx) error {
n := initialNodeSet[3].Copy()
n.Spec.Availability = api.NodeAvailabilityDrain
assert.NoError(t, store.UpdateNode(tx, n))
return nil
})
assert.NoError(t, err)
deletion4 := watchShutdownTask(t, watch)
assert.Equal(t, "id4", deletion4.ID)
assert.Equal(t, "id4", deletion4.NodeID)
// Delete node id1
err = s.Update(func(tx store.Tx) error {
assert.NoError(t, store.DeleteNode(tx, "id1"))
return nil
})
assert.NoError(t, err)
deletion5 := watchShutdownTask(t, watch)
assert.Equal(t, "id1", deletion5.ID)
assert.Equal(t, "id1", deletion5.NodeID)
}
func TestUpdaterRollback(t *testing.T) {
ctx := context.Background()
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
orchestrator := NewReplicatedOrchestrator(s)
defer orchestrator.Stop()
var (
failImage1 uint32
failImage2 uint32
)
watchCreate, cancelCreate := state.Watch(s.WatchQueue(), state.EventCreateTask{})
defer cancelCreate()
watchServiceUpdate, cancelServiceUpdate := state.Watch(s.WatchQueue(), state.EventUpdateService{})
defer cancelServiceUpdate()
// Fail new tasks the updater tries to run
watchUpdate, cancelUpdate := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancelUpdate()
go func() {
failedLast := false
for {
select {
case e := <-watchUpdate:
task := e.(state.EventUpdateTask).Task
if task.DesiredState == task.Status.State {
continue
}
if task.DesiredState == api.TaskStateRunning && task.Status.State != api.TaskStateFailed && task.Status.State != api.TaskStateRunning {
err := s.Update(func(tx store.Tx) error {
task = store.GetTask(tx, task.ID)
// Never fail two image2 tasks in a row, so there's a mix of
// failed and successful tasks for the rollback.
if task.Spec.GetContainer().Image == "image1" && atomic.LoadUint32(&failImage1) == 1 {
task.Status.State = api.TaskStateFailed
failedLast = true
} else if task.Spec.GetContainer().Image == "image2" && atomic.LoadUint32(&failImage2) == 1 && !failedLast {
task.Status.State = api.TaskStateFailed
failedLast = true
} else {
task.Status.State = task.DesiredState
failedLast = false
}
return store.UpdateTask(tx, task)
})
assert.NoError(t, err)
} else if task.DesiredState > api.TaskStateRunning {
err := s.Update(func(tx store.Tx) error {
task = store.GetTask(tx, task.ID)
task.Status.State = task.DesiredState
return store.UpdateTask(tx, task)
})
assert.NoError(t, err)
}
}
}
}()
// Create a service with four replicas specified before the orchestrator
// is started. This should result in two tasks when the orchestrator
// starts up.
err := s.Update(func(tx store.Tx) error {
s1 := &api.Service{
ID: "id1",
Spec: api.ServiceSpec{
Annotations: api.Annotations{
Name: "name1",
},
Task: api.TaskSpec{
Runtime: &api.TaskSpec_Container{
Container: &api.ContainerSpec{
Image: "image1",
},
},
Restart: &api.RestartPolicy{
Condition: api.RestartOnNone,
},
},
Mode: &api.ServiceSpec_Replicated{
Replicated: &api.ReplicatedService{
Replicas: 4,
},
},
Update: &api.UpdateConfig{
FailureAction: api.UpdateConfig_ROLLBACK,
Parallelism: 1,
Delay: *ptypes.DurationProto(10 * time.Millisecond),
Monitor: ptypes.DurationProto(500 * time.Millisecond),
MaxFailureRatio: 0.4,
},
},
}
assert.NoError(t, store.CreateService(tx, s1))
return nil
})
assert.NoError(t, err)
// Start the orchestrator.
go func() {
assert.NoError(t, orchestrator.Run(ctx))
}()
observedTask := testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
atomic.StoreUint32(&failImage2, 1)
// Start a rolling update
err = s.Update(func(tx store.Tx) error {
s1 := store.GetService(tx, "id1")
require.NotNil(t, s1)
s1.PreviousSpec = s1.Spec.Copy()
s1.UpdateStatus = nil
s1.Spec.Task.GetContainer().Image = "image2"
assert.NoError(t, store.UpdateService(tx, s1))
return nil
})
assert.NoError(t, err)
// Should see three tasks started, then a rollback
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image2")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image2")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image2")
// Should get to the ROLLBACK_STARTED state
for {
e := <-watchServiceUpdate
if e.(state.EventUpdateService).Service.UpdateStatus == nil {
continue
}
if e.(state.EventUpdateService).Service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_STARTED {
break
}
}
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
// Should end up in ROLLBACK_COMPLETED state
for {
e := <-watchServiceUpdate
if e.(state.EventUpdateService).Service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_COMPLETED {
break
}
}
atomic.StoreUint32(&failImage1, 1)
// Repeat the rolling update but this time fail the tasks that the
// rollback creates. It should end up in ROLLBACK_PAUSED.
err = s.Update(func(tx store.Tx) error {
s1 := store.GetService(tx, "id1")
require.NotNil(t, s1)
s1.PreviousSpec = s1.Spec.Copy()
s1.UpdateStatus = nil
s1.Spec.Task.GetContainer().Image = "image2"
assert.NoError(t, store.UpdateService(tx, s1))
return nil
})
assert.NoError(t, err)
// Should see three tasks started, then a rollback
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image2")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image2")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image2")
// Should get to the ROLLBACK_STARTED state
for {
e := <-watchServiceUpdate
if e.(state.EventUpdateService).Service.UpdateStatus == nil {
continue
}
if e.(state.EventUpdateService).Service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_STARTED {
break
}
}
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
observedTask = testutils.WatchTaskCreate(t, watchCreate)
assert.Equal(t, observedTask.Status.State, api.TaskStateNew)
assert.Equal(t, observedTask.Spec.GetContainer().Image, "image1")
// Should end up in ROLLBACK_PAUSED state
for {
e := <-watchServiceUpdate
if e.(state.EventUpdateService).Service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_PAUSED {
break
}
}
}
// Run starts all allocator go-routines and waits for Stop to be called.
func (a *Allocator) Run(ctx context.Context) error {
// Setup cancel context for all goroutines to use.
ctx, cancel := context.WithCancel(ctx)
var wg sync.WaitGroup
defer func() {
cancel()
wg.Wait()
close(a.doneChan)
}()
var actors []func() error
watch, watchCancel := state.Watch(a.store.WatchQueue(),
state.EventCreateNetwork{},
state.EventDeleteNetwork{},
state.EventCreateService{},
state.EventUpdateService{},
state.EventDeleteService{},
state.EventCreateTask{},
state.EventUpdateTask{},
state.EventDeleteTask{},
state.EventCreateNode{},
state.EventUpdateNode{},
state.EventDeleteNode{},
state.EventCommit{},
)
for _, aa := range []allocActor{
{
ch: watch,
cancel: watchCancel,
taskVoter: networkVoter,
init: a.doNetworkInit,
action: a.doNetworkAlloc,
},
} {
if aa.taskVoter != "" {
a.registerToVote(aa.taskVoter)
}
// Copy the iterated value for variable capture.
aaCopy := aa
actor := func() error {
wg.Add(1)
defer wg.Done()
// init might return an allocator specific context
// which is a child of the passed in context to hold
// allocator specific state
if err := aaCopy.init(ctx); err != nil {
// Stop the watches for this allocator
// if we are failing in the init of
// this allocator.
aa.cancel()
return err
}
wg.Add(1)
go func() {
defer wg.Done()
a.run(ctx, aaCopy)
}()
return nil
}
actors = append(actors, actor)
}
for _, actor := range actors {
if err := actor(); err != nil {
return err
}
}
<-a.stopChan
return nil
}
func TestScheduler(t *testing.T) {
ctx := context.Background()
initialNodeSet := []*api.Node{
{
ID: "id1",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name1",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
{
ID: "id2",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name2",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
{
ID: "id3",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name2",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
}
initialTaskSet := []*api.Task{
{
ID: "id1",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name1",
},
Status: api.TaskStatus{
State: api.TaskStateAssigned,
},
NodeID: initialNodeSet[0].ID,
},
{
ID: "id2",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name2",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
},
{
ID: "id3",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name2",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
},
}
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
err := s.Update(func(tx store.Tx) error {
// Prepoulate nodes
for _, n := range initialNodeSet {
assert.NoError(t, store.CreateNode(tx, n))
}
// Prepopulate tasks
for _, task := range initialTaskSet {
assert.NoError(t, store.CreateTask(tx, task))
}
return nil
})
assert.NoError(t, err)
scheduler := New(s)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
go func() {
assert.NoError(t, scheduler.Run(ctx))
}()
defer scheduler.Stop()
assignment1 := watchAssignment(t, watch)
// must assign to id2 or id3 since id1 already has a task
assert.Regexp(t, assignment1.NodeID, "(id2|id3)")
assignment2 := watchAssignment(t, watch)
// must assign to id2 or id3 since id1 already has a task
if assignment1.NodeID == "id2" {
assert.Equal(t, "id3", assignment2.NodeID)
} else {
assert.Equal(t, "id2", assignment2.NodeID)
}
err = s.Update(func(tx store.Tx) error {
// Update each node to make sure this doesn't mess up the
// scheduler's state.
for _, n := range initialNodeSet {
assert.NoError(t, store.UpdateNode(tx, n))
}
return nil
})
assert.NoError(t, err)
err = s.Update(func(tx store.Tx) error {
// Delete the task associated with node 1 so it's now the most lightly
// loaded node.
assert.NoError(t, store.DeleteTask(tx, "id1"))
// Create a new task. It should get assigned to id1.
t4 := &api.Task{
ID: "id4",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name4",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
assert.NoError(t, store.CreateTask(tx, t4))
return nil
})
assert.NoError(t, err)
assignment3 := watchAssignment(t, watch)
assert.Equal(t, "id1", assignment3.NodeID)
// Update a task to make it unassigned. It should get assigned by the
// scheduler.
err = s.Update(func(tx store.Tx) error {
// Remove assignment from task id4. It should get assigned
// to node id1.
t4 := &api.Task{
ID: "id4",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name4",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
assert.NoError(t, store.UpdateTask(tx, t4))
return nil
})
assert.NoError(t, err)
assignment4 := watchAssignment(t, watch)
assert.Equal(t, "id1", assignment4.NodeID)
err = s.Update(func(tx store.Tx) error {
// Create a ready node, then remove it. No tasks should ever
// be assigned to it.
node := &api.Node{
ID: "removednode",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "removednode",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_DOWN,
},
}
assert.NoError(t, store.CreateNode(tx, node))
assert.NoError(t, store.DeleteNode(tx, node.ID))
// Create an unassigned task.
task := &api.Task{
ID: "removednode",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "removednode",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
assert.NoError(t, store.CreateTask(tx, task))
return nil
})
assert.NoError(t, err)
assignmentRemovedNode := watchAssignment(t, watch)
assert.NotEqual(t, "removednode", assignmentRemovedNode.NodeID)
err = s.Update(func(tx store.Tx) error {
// Create a ready node. It should be used for the next
// assignment.
n4 := &api.Node{
ID: "id4",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name4",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
}
assert.NoError(t, store.CreateNode(tx, n4))
// Create an unassigned task.
t5 := &api.Task{
ID: "id5",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name5",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
assert.NoError(t, store.CreateTask(tx, t5))
return nil
})
assert.NoError(t, err)
assignment5 := watchAssignment(t, watch)
assert.Equal(t, "id4", assignment5.NodeID)
err = s.Update(func(tx store.Tx) error {
// Create a non-ready node. It should NOT be used for the next
// assignment.
n5 := &api.Node{
ID: "id5",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name5",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_DOWN,
},
}
assert.NoError(t, store.CreateNode(tx, n5))
// Create an unassigned task.
t6 := &api.Task{
ID: "id6",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name6",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
assert.NoError(t, store.CreateTask(tx, t6))
return nil
})
assert.NoError(t, err)
assignment6 := watchAssignment(t, watch)
assert.NotEqual(t, "id5", assignment6.NodeID)
err = s.Update(func(tx store.Tx) error {
// Update node id5 to put it in the READY state.
n5 := &api.Node{
ID: "id5",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name5",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
}
assert.NoError(t, store.UpdateNode(tx, n5))
// Create an unassigned task. Should be assigned to the
// now-ready node.
t7 := &api.Task{
ID: "id7",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name7",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
assert.NoError(t, store.CreateTask(tx, t7))
return nil
})
assert.NoError(t, err)
assignment7 := watchAssignment(t, watch)
assert.Equal(t, "id5", assignment7.NodeID)
err = s.Update(func(tx store.Tx) error {
// Create a ready node, then immediately take it down. The next
// unassigned task should NOT be assigned to it.
n6 := &api.Node{
ID: "id6",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name6",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
}
assert.NoError(t, store.CreateNode(tx, n6))
n6.Status.State = api.NodeStatus_DOWN
assert.NoError(t, store.UpdateNode(tx, n6))
// Create an unassigned task.
t8 := &api.Task{
ID: "id8",
DesiredState: api.TaskStateRunning,
ServiceAnnotations: api.Annotations{
Name: "name8",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
assert.NoError(t, store.CreateTask(tx, t8))
return nil
})
assert.NoError(t, err)
assignment8 := watchAssignment(t, watch)
assert.NotEqual(t, "id6", assignment8.NodeID)
}
func TestAllocator(t *testing.T) {
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
a, err := New(s)
assert.NoError(t, err)
assert.NotNil(t, a)
// Try adding some objects to store before allocator is started
assert.NoError(t, s.Update(func(tx store.Tx) error {
n1 := &api.Network{
ID: "testID1",
Spec: api.NetworkSpec{
Annotations: api.Annotations{
Name: "test1",
},
},
}
assert.NoError(t, store.CreateNetwork(tx, n1))
s1 := &api.Service{
ID: "testServiceID1",
Spec: api.ServiceSpec{
Annotations: api.Annotations{
Name: "service1",
},
Task: api.TaskSpec{
Networks: []*api.NetworkAttachmentConfig{
{
Target: "testID1",
},
},
},
Endpoint: &api.EndpointSpec{},
},
}
assert.NoError(t, store.CreateService(tx, s1))
t1 := &api.Task{
ID: "testTaskID1",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
Networks: []*api.NetworkAttachment{
{
Network: n1,
},
},
}
assert.NoError(t, store.CreateTask(tx, t1))
return nil
}))
netWatch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateNetwork{}, state.EventDeleteNetwork{})
defer cancel()
taskWatch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{}, state.EventDeleteTask{})
defer cancel()
serviceWatch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateService{}, state.EventDeleteService{})
defer cancel()
// Start allocator
go func() {
assert.NoError(t, a.Run(context.Background()))
}()
// Now verify if we get network and tasks updated properly
watchNetwork(t, netWatch, false, isValidNetwork)
watchTask(t, s, taskWatch, false, isValidTask)
watchService(t, serviceWatch, false, nil)
// Add new networks/tasks/services after allocator is started.
assert.NoError(t, s.Update(func(tx store.Tx) error {
n2 := &api.Network{
ID: "testID2",
Spec: api.NetworkSpec{
Annotations: api.Annotations{
Name: "test2",
},
},
}
assert.NoError(t, store.CreateNetwork(tx, n2))
return nil
}))
watchNetwork(t, netWatch, false, isValidNetwork)
assert.NoError(t, s.Update(func(tx store.Tx) error {
s2 := &api.Service{
ID: "testServiceID2",
Spec: api.ServiceSpec{
Annotations: api.Annotations{
Name: "service2",
},
Networks: []*api.NetworkAttachmentConfig{
{
Target: "testID2",
},
},
Endpoint: &api.EndpointSpec{},
},
}
assert.NoError(t, store.CreateService(tx, s2))
return nil
}))
watchService(t, serviceWatch, false, nil)
assert.NoError(t, s.Update(func(tx store.Tx) error {
t2 := &api.Task{
ID: "testTaskID2",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
ServiceID: "testServiceID2",
DesiredState: api.TaskStateRunning,
}
assert.NoError(t, store.CreateTask(tx, t2))
return nil
}))
watchTask(t, s, taskWatch, false, isValidTask)
// Now try adding a task which depends on a network before adding the network.
n3 := &api.Network{
ID: "testID3",
Spec: api.NetworkSpec{
Annotations: api.Annotations{
Name: "test3",
},
},
}
assert.NoError(t, s.Update(func(tx store.Tx) error {
t3 := &api.Task{
ID: "testTaskID3",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
DesiredState: api.TaskStateRunning,
Networks: []*api.NetworkAttachment{
{
Network: n3,
},
},
}
assert.NoError(t, store.CreateTask(tx, t3))
return nil
}))
// Wait for a little bit of time before adding network just to
// test network is not available while task allocation is
// going through
time.Sleep(10 * time.Millisecond)
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.CreateNetwork(tx, n3))
return nil
}))
watchNetwork(t, netWatch, false, isValidNetwork)
watchTask(t, s, taskWatch, false, isValidTask)
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.DeleteTask(tx, "testTaskID3"))
return nil
}))
watchTask(t, s, taskWatch, false, isValidTask)
assert.NoError(t, s.Update(func(tx store.Tx) error {
t5 := &api.Task{
ID: "testTaskID5",
Spec: api.TaskSpec{
Networks: []*api.NetworkAttachmentConfig{
{
Target: "testID2",
},
},
},
Status: api.TaskStatus{
State: api.TaskStateNew,
},
DesiredState: api.TaskStateRunning,
ServiceID: "testServiceID2",
}
assert.NoError(t, store.CreateTask(tx, t5))
return nil
}))
watchTask(t, s, taskWatch, false, isValidTask)
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.DeleteNetwork(tx, "testID3"))
return nil
}))
watchNetwork(t, netWatch, false, isValidNetwork)
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.DeleteService(tx, "testServiceID2"))
return nil
}))
watchService(t, serviceWatch, false, nil)
// Try to create a task with no network attachments and test
// that it moves to ALLOCATED state.
assert.NoError(t, s.Update(func(tx store.Tx) error {
t4 := &api.Task{
ID: "testTaskID4",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
DesiredState: api.TaskStateRunning,
}
assert.NoError(t, store.CreateTask(tx, t4))
return nil
}))
watchTask(t, s, taskWatch, false, isValidTask)
assert.NoError(t, s.Update(func(tx store.Tx) error {
n2 := store.GetNetwork(tx, "testID2")
require.NotEqual(t, nil, n2)
assert.NoError(t, store.UpdateNetwork(tx, n2))
return nil
}))
watchNetwork(t, netWatch, false, isValidNetwork)
watchNetwork(t, netWatch, true, nil)
// Try updating task which is already allocated
assert.NoError(t, s.Update(func(tx store.Tx) error {
t2 := store.GetTask(tx, "testTaskID2")
require.NotEqual(t, nil, t2)
assert.NoError(t, store.UpdateTask(tx, t2))
return nil
}))
watchTask(t, s, taskWatch, false, isValidTask)
watchTask(t, s, taskWatch, true, nil)
// Try adding networks with conflicting network resources and
// add task which attaches to a network which gets allocated
// later and verify if task reconciles and moves to ALLOCATED.
n4 := &api.Network{
ID: "testID4",
Spec: api.NetworkSpec{
Annotations: api.Annotations{
Name: "test4",
},
DriverConfig: &api.Driver{
Name: "overlay",
Options: map[string]string{
"com.docker.network.driver.overlay.vxlanid_list": "328",
},
},
},
}
n5 := n4.Copy()
n5.ID = "testID5"
n5.Spec.Annotations.Name = "test5"
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.CreateNetwork(tx, n4))
return nil
}))
watchNetwork(t, netWatch, false, isValidNetwork)
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.CreateNetwork(tx, n5))
return nil
}))
watchNetwork(t, netWatch, true, nil)
assert.NoError(t, s.Update(func(tx store.Tx) error {
t6 := &api.Task{
ID: "testTaskID6",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
DesiredState: api.TaskStateRunning,
Networks: []*api.NetworkAttachment{
{
Network: n5,
},
},
}
assert.NoError(t, store.CreateTask(tx, t6))
return nil
}))
watchTask(t, s, taskWatch, true, nil)
// Now remove the conflicting network.
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.DeleteNetwork(tx, n4.ID))
return nil
}))
watchNetwork(t, netWatch, false, isValidNetwork)
watchTask(t, s, taskWatch, false, isValidTask)
// Try adding services with conflicting port configs and add
// task which is part of the service whose allocation hasn't
// happened and when that happens later and verify if task
// reconciles and moves to ALLOCATED.
s3 := &api.Service{
ID: "testServiceID3",
Spec: api.ServiceSpec{
Annotations: api.Annotations{
Name: "service3",
},
Endpoint: &api.EndpointSpec{
Ports: []*api.PortConfig{
{
Name: "http",
TargetPort: 80,
PublishedPort: 8080,
},
},
},
},
}
s4 := s3.Copy()
s4.ID = "testServiceID4"
s4.Spec.Annotations.Name = "service4"
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.CreateService(tx, s3))
return nil
}))
watchService(t, serviceWatch, false, nil)
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.CreateService(tx, s4))
return nil
}))
watchService(t, serviceWatch, true, nil)
assert.NoError(t, s.Update(func(tx store.Tx) error {
t7 := &api.Task{
ID: "testTaskID7",
Status: api.TaskStatus{
State: api.TaskStateNew,
},
ServiceID: "testServiceID4",
DesiredState: api.TaskStateRunning,
}
assert.NoError(t, store.CreateTask(tx, t7))
return nil
}))
watchTask(t, s, taskWatch, true, nil)
// Now remove the conflicting service.
assert.NoError(t, s.Update(func(tx store.Tx) error {
assert.NoError(t, store.DeleteService(tx, s3.ID))
return nil
}))
watchService(t, serviceWatch, false, nil)
watchTask(t, s, taskWatch, false, isValidTask)
a.Stop()
}
func TestHA(t *testing.T) {
ctx := context.Background()
initialNodeSet := []*api.Node{
{
ID: "id1",
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
{
ID: "id2",
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
{
ID: "id3",
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
{
ID: "id4",
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
{
ID: "id5",
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
},
}
taskTemplate1 := &api.Task{
DesiredState: api.TaskStateRunning,
ServiceID: "service1",
Spec: api.TaskSpec{
Runtime: &api.TaskSpec_Container{
Container: &api.ContainerSpec{
Image: "v:1",
},
},
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
taskTemplate2 := &api.Task{
DesiredState: api.TaskStateRunning,
ServiceID: "service2",
Spec: api.TaskSpec{
Runtime: &api.TaskSpec_Container{
Container: &api.ContainerSpec{
Image: "v:2",
},
},
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
t1Instances := 18
err := s.Update(func(tx store.Tx) error {
// Prepoulate nodes
for _, n := range initialNodeSet {
assert.NoError(t, store.CreateNode(tx, n))
}
// Prepopulate tasks from template 1
for i := 0; i != t1Instances; i++ {
taskTemplate1.ID = fmt.Sprintf("t1id%d", i)
assert.NoError(t, store.CreateTask(tx, taskTemplate1))
}
return nil
})
assert.NoError(t, err)
scheduler := New(s)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
go func() {
assert.NoError(t, scheduler.Run(ctx))
}()
defer scheduler.Stop()
t1Assignments := make(map[string]int)
for i := 0; i != t1Instances; i++ {
assignment := watchAssignment(t, watch)
if !strings.HasPrefix(assignment.ID, "t1") {
t.Fatal("got assignment for different kind of task")
}
t1Assignments[assignment.NodeID]++
}
assert.Len(t, t1Assignments, 5)
nodesWith3T1Tasks := 0
nodesWith4T1Tasks := 0
for nodeID, taskCount := range t1Assignments {
if taskCount == 3 {
nodesWith3T1Tasks++
} else if taskCount == 4 {
nodesWith4T1Tasks++
} else {
t.Fatalf("unexpected number of tasks %d on node %s", taskCount, nodeID)
}
}
assert.Equal(t, 3, nodesWith4T1Tasks)
assert.Equal(t, 2, nodesWith3T1Tasks)
t2Instances := 2
// Add a new service with two instances. They should fill the nodes
// that only have two tasks.
err = s.Update(func(tx store.Tx) error {
for i := 0; i != t2Instances; i++ {
taskTemplate2.ID = fmt.Sprintf("t2id%d", i)
assert.NoError(t, store.CreateTask(tx, taskTemplate2))
}
return nil
})
assert.NoError(t, err)
t2Assignments := make(map[string]int)
for i := 0; i != t2Instances; i++ {
assignment := watchAssignment(t, watch)
if !strings.HasPrefix(assignment.ID, "t2") {
t.Fatal("got assignment for different kind of task")
}
t2Assignments[assignment.NodeID]++
}
assert.Len(t, t2Assignments, 2)
for nodeID := range t2Assignments {
assert.Equal(t, 3, t1Assignments[nodeID])
}
// Scale up service 1 to 21 tasks. It should cover the two nodes that
// service 2 was assigned to, and also one other node.
err = s.Update(func(tx store.Tx) error {
for i := t1Instances; i != t1Instances+3; i++ {
taskTemplate1.ID = fmt.Sprintf("t1id%d", i)
assert.NoError(t, store.CreateTask(tx, taskTemplate1))
}
return nil
})
assert.NoError(t, err)
var sharedNodes [2]string
for i := 0; i != 3; i++ {
assignment := watchAssignment(t, watch)
if !strings.HasPrefix(assignment.ID, "t1") {
t.Fatal("got assignment for different kind of task")
}
if t1Assignments[assignment.NodeID] == 5 {
t.Fatal("more than one new task assigned to the same node")
}
t1Assignments[assignment.NodeID]++
if t2Assignments[assignment.NodeID] != 0 {
if sharedNodes[0] == "" {
sharedNodes[0] = assignment.NodeID
} else if sharedNodes[1] == "" {
sharedNodes[1] = assignment.NodeID
} else {
t.Fatal("all three assignments went to nodes with service2 tasks")
}
}
}
assert.NotEmpty(t, sharedNodes[0])
assert.NotEmpty(t, sharedNodes[1])
assert.NotEqual(t, sharedNodes[0], sharedNodes[1])
nodesWith4T1Tasks = 0
nodesWith5T1Tasks := 0
for nodeID, taskCount := range t1Assignments {
if taskCount == 4 {
nodesWith4T1Tasks++
} else if taskCount == 5 {
nodesWith5T1Tasks++
} else {
t.Fatalf("unexpected number of tasks %d on node %s", taskCount, nodeID)
}
}
assert.Equal(t, 4, nodesWith4T1Tasks)
assert.Equal(t, 1, nodesWith5T1Tasks)
// Add another task from service2. It must not land on the node that
// has 5 service1 tasks.
err = s.Update(func(tx store.Tx) error {
taskTemplate2.ID = "t2id4"
assert.NoError(t, store.CreateTask(tx, taskTemplate2))
return nil
})
assert.NoError(t, err)
assignment := watchAssignment(t, watch)
if assignment.ID != "t2id4" {
t.Fatal("got assignment for different task")
}
if t2Assignments[assignment.NodeID] != 0 {
t.Fatal("was scheduled on a node that already has a service2 task")
}
if t1Assignments[assignment.NodeID] == 5 {
t.Fatal("was scheduled on the node that has the most service1 tasks")
}
t2Assignments[assignment.NodeID]++
// Remove all tasks on node id1.
err = s.Update(func(tx store.Tx) error {
tasks, err := store.FindTasks(tx, store.ByNodeID("id1"))
assert.NoError(t, err)
for _, task := range tasks {
assert.NoError(t, store.DeleteTask(tx, task.ID))
}
return nil
})
assert.NoError(t, err)
t1Assignments["id1"] = 0
t2Assignments["id1"] = 0
// Add four instances of service1 and two instances of service2.
// All instances of service1 should land on node "id1", and one
// of the two service2 instances should as well.
// Put these in a map to randomize the order in which they are
// created.
err = s.Update(func(tx store.Tx) error {
tasksMap := make(map[string]*api.Task)
for i := 22; i <= 25; i++ {
taskTemplate1.ID = fmt.Sprintf("t1id%d", i)
tasksMap[taskTemplate1.ID] = taskTemplate1.Copy()
}
for i := 5; i <= 6; i++ {
taskTemplate2.ID = fmt.Sprintf("t2id%d", i)
tasksMap[taskTemplate2.ID] = taskTemplate2.Copy()
}
for _, task := range tasksMap {
assert.NoError(t, store.CreateTask(tx, task))
}
return nil
})
assert.NoError(t, err)
for i := 0; i != 4+2; i++ {
assignment := watchAssignment(t, watch)
if strings.HasPrefix(assignment.ID, "t1") {
t1Assignments[assignment.NodeID]++
} else if strings.HasPrefix(assignment.ID, "t2") {
t2Assignments[assignment.NodeID]++
}
}
assert.Equal(t, 4, t1Assignments["id1"])
assert.Equal(t, 1, t2Assignments["id1"])
}
func TestUpdater(t *testing.T) {
ctx := context.Background()
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
// Move tasks to their desired state.
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
go func() {
for {
select {
case e := <-watch:
task := e.(state.EventUpdateTask).Task
if task.Status.State == task.DesiredState {
continue
}
err := s.Update(func(tx store.Tx) error {
task = store.GetTask(tx, task.ID)
task.Status.State = task.DesiredState
return store.UpdateTask(tx, task)
})
assert.NoError(t, err)
}
}
}()
instances := 3
cluster := &api.Cluster{
// test cluster configuration propagation to task creation.
Spec: api.ClusterSpec{
Annotations: api.Annotations{
Name: "default",
},
},
}
service := &api.Service{
ID: "id1",
Spec: api.ServiceSpec{
Annotations: api.Annotations{
Name: "name1",
},
Mode: &api.ServiceSpec_Replicated{
Replicated: &api.ReplicatedService{
Replicas: uint64(instances),
},
},
Task: api.TaskSpec{
Runtime: &api.TaskSpec_Container{
Container: &api.ContainerSpec{
Image: "v:1",
// This won't apply in this test because we set the old tasks to DEAD.
StopGracePeriod: ptypes.DurationProto(time.Hour),
},
},
},
},
}
err := s.Update(func(tx store.Tx) error {
assert.NoError(t, store.CreateCluster(tx, cluster))
assert.NoError(t, store.CreateService(tx, service))
for i := 0; i < instances; i++ {
assert.NoError(t, store.CreateTask(tx, newTask(cluster, service, uint64(i))))
}
return nil
})
assert.NoError(t, err)
originalTasks := getRunnableServiceTasks(t, s, service)
for _, task := range originalTasks {
assert.Equal(t, "v:1", task.Spec.GetContainer().Image)
assert.Nil(t, task.LogDriver) // should be left alone
}
service.Spec.Task.GetContainer().Image = "v:2"
service.Spec.Task.LogDriver = &api.Driver{Name: "tasklogdriver"}
updater := NewUpdater(s, NewRestartSupervisor(s))
updater.Run(ctx, cluster, service, getRunnableServiceTasks(t, s, service))
updatedTasks := getRunnableServiceTasks(t, s, service)
for _, task := range updatedTasks {
assert.Equal(t, "v:2", task.Spec.GetContainer().Image)
assert.Equal(t, service.Spec.Task.LogDriver, task.LogDriver) // pick up from task
}
service.Spec.Task.GetContainer().Image = "v:3"
cluster.Spec.DefaultLogDriver = &api.Driver{Name: "clusterlogdriver"} // make cluster default logdriver.
service.Spec.Update = &api.UpdateConfig{
Parallelism: 1,
}
updater = NewUpdater(s, NewRestartSupervisor(s))
updater.Run(ctx, cluster, service, getRunnableServiceTasks(t, s, service))
updatedTasks = getRunnableServiceTasks(t, s, service)
for _, task := range updatedTasks {
assert.Equal(t, "v:3", task.Spec.GetContainer().Image)
assert.Equal(t, service.Spec.Task.LogDriver, task.LogDriver) // still pick up from task
}
service.Spec.Task.GetContainer().Image = "v:4"
service.Spec.Task.LogDriver = nil // use cluster default now.
service.Spec.Update = &api.UpdateConfig{
Parallelism: 1,
Delay: *ptypes.DurationProto(10 * time.Millisecond),
}
updater = NewUpdater(s, NewRestartSupervisor(s))
updater.Run(ctx, cluster, service, getRunnableServiceTasks(t, s, service))
updatedTasks = getRunnableServiceTasks(t, s, service)
for _, task := range updatedTasks {
assert.Equal(t, "v:4", task.Spec.GetContainer().Image)
assert.Equal(t, cluster.Spec.DefaultLogDriver, task.LogDriver) // pick up from cluster
}
}
func TestUpdaterStopGracePeriod(t *testing.T) {
ctx := context.Background()
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
// Move tasks to their desired state.
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
go func() {
for {
select {
case e := <-watch:
task := e.(state.EventUpdateTask).Task
err := s.Update(func(tx store.Tx) error {
task = store.GetTask(tx, task.ID)
// Explicitly do not set task state to
// DEAD to trigger StopGracePeriod
if task.DesiredState == api.TaskStateRunning && task.Status.State != api.TaskStateRunning {
task.Status.State = api.TaskStateRunning
return store.UpdateTask(tx, task)
}
return nil
})
assert.NoError(t, err)
}
}
}()
var instances uint64 = 3
service := &api.Service{
ID: "id1",
Spec: api.ServiceSpec{
Annotations: api.Annotations{
Name: "name1",
},
Task: api.TaskSpec{
Runtime: &api.TaskSpec_Container{
Container: &api.ContainerSpec{
Image: "v:1",
StopGracePeriod: ptypes.DurationProto(100 * time.Millisecond),
},
},
},
Mode: &api.ServiceSpec_Replicated{
Replicated: &api.ReplicatedService{
Replicas: instances,
},
},
},
}
err := s.Update(func(tx store.Tx) error {
assert.NoError(t, store.CreateService(tx, service))
for i := uint64(0); i < instances; i++ {
task := newTask(nil, service, uint64(i))
task.Status.State = api.TaskStateRunning
assert.NoError(t, store.CreateTask(tx, task))
}
return nil
})
assert.NoError(t, err)
originalTasks := getRunnableServiceTasks(t, s, service)
for _, task := range originalTasks {
assert.Equal(t, "v:1", task.Spec.GetContainer().Image)
}
before := time.Now()
service.Spec.Task.GetContainer().Image = "v:2"
updater := NewUpdater(s, NewRestartSupervisor(s))
// Override the default (1 minute) to speed up the test.
updater.restarts.taskTimeout = 100 * time.Millisecond
updater.Run(ctx, nil, service, getRunnableServiceTasks(t, s, service))
updatedTasks := getRunnableServiceTasks(t, s, service)
for _, task := range updatedTasks {
assert.Equal(t, "v:2", task.Spec.GetContainer().Image)
}
after := time.Now()
// At least 100 ms should have elapsed. Only check the lower bound,
// because the system may be slow and it could have taken longer.
if after.Sub(before) < 100*time.Millisecond {
t.Fatal("stop timeout should have elapsed")
}
}
func TestSchedulerResourceConstraintHA(t *testing.T) {
// node 1 starts with 1 task, node 2 starts with 3 tasks.
// however, node 1 only has enough memory to schedule one more task.
ctx := context.Background()
node1 := &api.Node{
ID: "id1",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "id1",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
Description: &api.NodeDescription{
Resources: &api.Resources{
MemoryBytes: 1e9,
},
},
}
node2 := &api.Node{
ID: "id2",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "id2",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
Description: &api.NodeDescription{
Resources: &api.Resources{
MemoryBytes: 1e11,
},
},
}
taskTemplate := &api.Task{
DesiredState: api.TaskStateRunning,
Spec: api.TaskSpec{
Runtime: &api.TaskSpec_Container{
Container: &api.ContainerSpec{},
},
Resources: &api.ResourceRequirements{
Reservations: &api.Resources{
MemoryBytes: 5e8,
},
},
},
ServiceAnnotations: api.Annotations{
Name: "name1",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
err := s.Update(func(tx store.Tx) error {
// Add initial node and task
assert.NoError(t, store.CreateNode(tx, node1))
assert.NoError(t, store.CreateNode(tx, node2))
// preassigned tasks
task1 := taskTemplate.Copy()
task1.ID = "id1"
task1.NodeID = "id1"
task1.Status.State = api.TaskStateRunning
assert.NoError(t, store.CreateTask(tx, task1))
task2 := taskTemplate.Copy()
task2.ID = "id2"
task2.NodeID = "id2"
task2.Status.State = api.TaskStateRunning
assert.NoError(t, store.CreateTask(tx, task2))
task3 := taskTemplate.Copy()
task3.ID = "id3"
task3.NodeID = "id2"
task3.Status.State = api.TaskStateRunning
assert.NoError(t, store.CreateTask(tx, task3))
task4 := taskTemplate.Copy()
task4.ID = "id4"
task4.NodeID = "id2"
task4.Status.State = api.TaskStateRunning
assert.NoError(t, store.CreateTask(tx, task4))
// tasks to assign
task5 := taskTemplate.Copy()
task5.ID = "id5"
assert.NoError(t, store.CreateTask(tx, task5))
task6 := taskTemplate.Copy()
task6.ID = "id6"
assert.NoError(t, store.CreateTask(tx, task6))
return nil
})
assert.NoError(t, err)
scheduler := New(s)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
go func() {
assert.NoError(t, scheduler.Run(ctx))
}()
defer scheduler.Stop()
assignment1 := watchAssignment(t, watch)
if assignment1.ID != "id5" && assignment1.ID != "id6" {
t.Fatal("assignment for unexpected task")
}
assignment2 := watchAssignment(t, watch)
if assignment1.ID == "id5" {
assert.Equal(t, "id6", assignment2.ID)
} else {
assert.Equal(t, "id5", assignment2.ID)
}
if assignment1.NodeID == "id1" {
assert.Equal(t, "id2", assignment2.NodeID)
} else {
assert.Equal(t, "id1", assignment2.NodeID)
}
}
// Run starts the update and returns only once its complete or cancelled.
func (u *Updater) Run(ctx context.Context, slots []slot) {
defer close(u.doneChan)
service := u.newService
// If the update is in a PAUSED state, we should not do anything.
if service.UpdateStatus != nil &&
(service.UpdateStatus.State == api.UpdateStatus_PAUSED ||
service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_PAUSED) {
return
}
var dirtySlots []slot
for _, slot := range slots {
if u.isSlotDirty(slot) {
dirtySlots = append(dirtySlots, slot)
}
}
// Abort immediately if all tasks are clean.
if len(dirtySlots) == 0 {
if service.UpdateStatus != nil &&
(service.UpdateStatus.State == api.UpdateStatus_UPDATING ||
service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_STARTED) {
u.completeUpdate(ctx, service.ID)
}
return
}
// If there's no update in progress, we are starting one.
if service.UpdateStatus == nil {
u.startUpdate(ctx, service.ID)
}
parallelism := 0
if service.Spec.Update != nil {
parallelism = int(service.Spec.Update.Parallelism)
}
if parallelism == 0 {
// TODO(aluzzardi): We could try to optimize unlimited parallelism by performing updates in a single
// goroutine using a batch transaction.
parallelism = len(dirtySlots)
}
// Start the workers.
slotQueue := make(chan slot)
wg := sync.WaitGroup{}
wg.Add(parallelism)
for i := 0; i < parallelism; i++ {
go func() {
u.worker(ctx, slotQueue)
wg.Done()
}()
}
failureAction := api.UpdateConfig_PAUSE
allowedFailureFraction := float32(0)
monitoringPeriod := defaultMonitor
if service.Spec.Update != nil {
failureAction = service.Spec.Update.FailureAction
allowedFailureFraction = service.Spec.Update.AllowedFailureFraction
if service.Spec.Update.Monitor != nil {
var err error
monitoringPeriod, err = ptypes.Duration(service.Spec.Update.Monitor)
if err != nil {
monitoringPeriod = defaultMonitor
}
}
}
var failedTaskWatch chan events.Event
if failureAction != api.UpdateConfig_CONTINUE {
var cancelWatch func()
failedTaskWatch, cancelWatch = state.Watch(
u.store.WatchQueue(),
state.EventUpdateTask{
Task: &api.Task{ServiceID: service.ID, Status: api.TaskStatus{State: api.TaskStateRunning}},
Checks: []state.TaskCheckFunc{state.TaskCheckServiceID, state.TaskCheckStateGreaterThan},
},
)
defer cancelWatch()
}
stopped := false
failedTasks := make(map[string]struct{})
totalFailures := 0
failureTriggersAction := func(failedTask *api.Task) bool {
// Ignore tasks we have already seen as failures.
if _, found := failedTasks[failedTask.ID]; found {
return false
}
// If this failed/completed task is one that we
// created as part of this update, we should
// follow the failure action.
u.updatedTasksMu.Lock()
startedAt, found := u.updatedTasks[failedTask.ID]
u.updatedTasksMu.Unlock()
if found && (startedAt.IsZero() || time.Since(startedAt) <= monitoringPeriod) {
failedTasks[failedTask.ID] = struct{}{}
totalFailures++
if float32(totalFailures)/float32(len(dirtySlots)) > allowedFailureFraction {
switch failureAction {
case api.UpdateConfig_PAUSE:
stopped = true
message := fmt.Sprintf("update paused due to failure or early termination of task %s", failedTask.ID)
u.pauseUpdate(ctx, service.ID, message)
return true
case api.UpdateConfig_ROLLBACK:
// Never roll back a rollback
if service.UpdateStatus != nil && service.UpdateStatus.State == api.UpdateStatus_ROLLBACK_STARTED {
message := fmt.Sprintf("rollback paused due to failure or early termination of task %s", failedTask.ID)
u.pauseUpdate(ctx, service.ID, message)
return true
}
stopped = true
message := fmt.Sprintf("update rolled back due to failure or early termination of task %s", failedTask.ID)
u.rollbackUpdate(ctx, service.ID, message)
return true
}
}
}
return false
}
slotsLoop:
for _, slot := range dirtySlots {
retryLoop:
for {
// Wait for a worker to pick up the task or abort the update, whichever comes first.
select {
case <-u.stopChan:
stopped = true
break slotsLoop
case ev := <-failedTaskWatch:
if failureTriggersAction(ev.(state.EventUpdateTask).Task) {
break slotsLoop
}
case slotQueue <- slot:
break retryLoop
}
}
}
close(slotQueue)
wg.Wait()
if !stopped {
// Keep watching for task failures for one more monitoringPeriod,
// before declaring the update complete.
doneMonitoring := time.After(monitoringPeriod)
monitorLoop:
for {
select {
case <-u.stopChan:
stopped = true
break monitorLoop
case <-doneMonitoring:
break monitorLoop
case ev := <-failedTaskWatch:
if failureTriggersAction(ev.(state.EventUpdateTask).Task) {
break monitorLoop
}
}
}
}
// TODO(aaronl): Potentially roll back the service if not enough tasks
// have reached RUNNING by this point.
if !stopped {
u.completeUpdate(ctx, service.ID)
}
}
func (u *Updater) updateTask(ctx context.Context, slot slot, updated *api.Task) error {
// Kick off the watch before even creating the updated task. This is in order to avoid missing any event.
taskUpdates, cancel := state.Watch(u.watchQueue, state.EventUpdateTask{
Task: &api.Task{ID: updated.ID},
Checks: []state.TaskCheckFunc{state.TaskCheckID},
})
defer cancel()
// Create an empty entry for this task, so the updater knows a failure
// should count towards the failure count. The timestamp is added
// if/when the task reaches RUNNING.
u.updatedTasksMu.Lock()
u.updatedTasks[updated.ID] = time.Time{}
u.updatedTasksMu.Unlock()
var delayStartCh <-chan struct{}
// Atomically create the updated task and bring down the old one.
_, err := u.store.Batch(func(batch *store.Batch) error {
oldTask, err := u.removeOldTasks(ctx, batch, slot)
if err != nil {
return err
}
err = batch.Update(func(tx store.Tx) error {
if err := store.CreateTask(tx, updated); err != nil {
return err
}
return nil
})
if err != nil {
return err
}
delayStartCh = u.restarts.DelayStart(ctx, nil, oldTask, updated.ID, 0, true)
return nil
})
if err != nil {
return err
}
if delayStartCh != nil {
<-delayStartCh
}
// Wait for the new task to come up.
// TODO(aluzzardi): Consider adding a timeout here.
for {
select {
case e := <-taskUpdates:
updated = e.(state.EventUpdateTask).Task
if updated.Status.State >= api.TaskStateRunning {
u.updatedTasksMu.Lock()
u.updatedTasks[updated.ID] = time.Now()
u.updatedTasksMu.Unlock()
return nil
}
case <-u.stopChan:
return nil
}
}
}
func TestSchedulerResourceConstraint(t *testing.T) {
ctx := context.Background()
// Create a ready node without enough memory to run the task.
underprovisionedNode := &api.Node{
ID: "underprovisioned",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "underprovisioned",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
Description: &api.NodeDescription{
Resources: &api.Resources{
NanoCPUs: 1e9,
MemoryBytes: 1e9,
},
},
}
// Non-ready nodes that satisfy the constraints but shouldn't be used
nonready1 := &api.Node{
ID: "nonready1",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "nonready1",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_UNKNOWN,
},
Description: &api.NodeDescription{
Resources: &api.Resources{
NanoCPUs: 2e9,
MemoryBytes: 2e9,
},
},
}
nonready2 := &api.Node{
ID: "nonready2",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "nonready2",
},
},
Status: api.NodeStatus{
State: api.NodeStatus_UNKNOWN,
},
Description: &api.NodeDescription{
Resources: &api.Resources{
NanoCPUs: 2e9,
MemoryBytes: 2e9,
},
},
}
initialTask := &api.Task{
ID: "id1",
DesiredState: api.TaskStateRunning,
Spec: api.TaskSpec{
Runtime: &api.TaskSpec_Container{
Container: &api.ContainerSpec{},
},
Resources: &api.ResourceRequirements{
Reservations: &api.Resources{
MemoryBytes: 2e9,
},
},
},
ServiceAnnotations: api.Annotations{
Name: "name1",
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
}
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
err := s.Update(func(tx store.Tx) error {
// Add initial node and task
assert.NoError(t, store.CreateTask(tx, initialTask))
assert.NoError(t, store.CreateNode(tx, underprovisionedNode))
assert.NoError(t, store.CreateNode(tx, nonready1))
assert.NoError(t, store.CreateNode(tx, nonready2))
return nil
})
assert.NoError(t, err)
scheduler := New(s)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
go func() {
assert.NoError(t, scheduler.Run(ctx))
}()
defer scheduler.Stop()
failure := watchAssignmentFailure(t, watch)
assert.Equal(t, "no suitable node (2 nodes not available for new tasks; insufficient resources on 1 node)", failure.Status.Message)
err = s.Update(func(tx store.Tx) error {
// Create a node with enough memory. The task should get
// assigned to this node.
node := &api.Node{
ID: "bignode",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "bignode",
},
},
Description: &api.NodeDescription{
Resources: &api.Resources{
NanoCPUs: 4e9,
MemoryBytes: 8e9,
},
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
}
assert.NoError(t, store.CreateNode(tx, node))
return nil
})
assert.NoError(t, err)
assignment := watchAssignment(t, watch)
assert.Equal(t, "bignode", assignment.NodeID)
}