func (c *Client) ExpectedScalingEvents(actual, expected map[string]int, releaseProcesses map[string]ct.ProcessType, clusterSize int) ct.JobEvents {
events := make(ct.JobEvents, len(expected))
for typ, count := range expected {
diff := count
val, ok := actual[typ]
if ok {
diff = count - val
}
proc, ok := releaseProcesses[typ]
if ok && proc.Omni {
diff *= clusterSize
}
if diff > 0 {
events[typ] = ct.JobUpEvents(diff)
} else if diff < 0 {
events[typ] = ct.JobDownEvents(-diff)
}
}
return events
}
func (s *SchedulerSuite) TestScaleTags(t *c.C) {
// ensure we have more than 1 host to test with
hosts, err := s.clusterClient(t).Hosts()
t.Assert(err, c.IsNil)
if len(hosts) <= 1 {
t.Skip("not enough hosts to test tagged based scheduling")
}
// watch service events so we can wait for tag changes
events := make(chan *discoverd.Event)
stream, err := s.discoverdClient(t).Service("flynn-host").Watch(events)
t.Assert(err, c.IsNil)
defer stream.Close()
waitServiceEvent := func(kind discoverd.EventKind) *discoverd.Event {
for {
select {
case event, ok := <-events:
if !ok {
t.Fatalf("service event stream closed unexpectedly: %s", stream.Err())
}
if event.Kind == kind {
return event
}
case <-time.After(10 * time.Second):
t.Fatalf("timed out waiting for service %s event", kind)
}
}
}
// wait for the watch to be current before changing tags
waitServiceEvent(discoverd.EventKindCurrent)
updateTags := func(host *cluster.Host, tags map[string]string) {
debugf(t, "setting host tags: %s => %v", host.ID(), tags)
t.Assert(host.UpdateTags(tags), c.IsNil)
event := waitServiceEvent(discoverd.EventKindUpdate)
t.Assert(event.Instance.Meta["id"], c.Equals, host.ID())
for key, val := range tags {
t.Assert(event.Instance.Meta["tag:"+key], c.Equals, val)
}
}
// create an app with a tagged process and watch job events
app, release := s.createApp(t)
formation := &ct.Formation{
AppID: app.ID,
ReleaseID: release.ID,
Tags: map[string]map[string]string{"printer": {"active": "true"}},
}
client := s.controllerClient(t)
watcher, err := client.WatchJobEvents(app.ID, release.ID)
t.Assert(err, c.IsNil)
defer watcher.Close()
// add tag to host 1
host1 := hosts[0]
updateTags(host1, map[string]string{"active": "true"})
// start jobs
debug(t, "scaling printer=2")
formation.Processes = map[string]int{"printer": 2}
t.Assert(client.PutFormation(formation), c.IsNil)
t.Assert(watcher.WaitFor(ct.JobEvents{"printer": ct.JobUpEvents(2)}, scaleTimeout, nil), c.IsNil)
assertHostJobCounts := func(expected map[string]int) {
jobs, err := client.JobList(app.ID)
t.Assert(err, c.IsNil)
actual := make(map[string]int)
for _, job := range jobs {
if job.State == ct.JobStateUp {
actual[job.HostID]++
}
}
t.Assert(actual, c.DeepEquals, expected)
}
// check all jobs on host 1
assertHostJobCounts(map[string]int{host1.ID(): 2})
// add tag to host 2
host2 := hosts[1]
updateTags(host2, map[string]string{"active": "true"})
// scale up
debug(t, "scaling printer=4")
formation.Processes["printer"] = 4
t.Assert(client.PutFormation(formation), c.IsNil)
t.Assert(watcher.WaitFor(ct.JobEvents{"printer": ct.JobUpEvents(2)}, scaleTimeout, nil), c.IsNil)
// check jobs distributed across hosts 1 and 2
assertHostJobCounts(map[string]int{host1.ID(): 2, host2.ID(): 2})
// remove tag from host 2
updateTags(host2, map[string]string{"active": ""})
// check jobs are moved to host1
jobEvents := ct.JobEvents{"printer": map[ct.JobState]int{
ct.JobStateDown: 2,
ct.JobStateUp: 2,
}}
t.Assert(watcher.WaitFor(jobEvents, scaleTimeout, nil), c.IsNil)
assertHostJobCounts(map[string]int{host1.ID(): 4})
// remove tag from host 1
updateTags(host1, map[string]string{"active": ""})
assertStateCounts := func(expected map[ct.JobState]int) {
jobs, err := client.JobList(app.ID)
t.Assert(err, c.IsNil)
actual := make(map[ct.JobState]int)
for _, job := range jobs {
actual[job.State]++
}
t.Assert(actual, c.DeepEquals, expected)
}
// check 4 pending jobs, rest are stopped
t.Assert(watcher.WaitFor(ct.JobEvents{"printer": ct.JobDownEvents(4)}, scaleTimeout, nil), c.IsNil)
assertStateCounts(map[ct.JobState]int{ct.JobStatePending: 4, ct.JobStateDown: 6})
// re-add tag to host 1
updateTags(host1, map[string]string{"active": "true"})
// check pending jobs are started on host 1
t.Assert(watcher.WaitFor(ct.JobEvents{"printer": ct.JobUpEvents(4)}, scaleTimeout, nil), c.IsNil)
assertHostJobCounts(map[string]int{host1.ID(): 4})
assertStateCounts(map[ct.JobState]int{ct.JobStateUp: 4, ct.JobStateDown: 6})
// add different tag to host 2
updateTags(host2, map[string]string{"disk": "ssd"})
// update formation tags, check jobs are moved to host 2
debug(t, "updating formation tags to disk=ssd")
formation.Tags["printer"] = map[string]string{"disk": "ssd"}
t.Assert(client.PutFormation(formation), c.IsNil)
jobEvents = ct.JobEvents{"printer": map[ct.JobState]int{
ct.JobStateDown: 4,
ct.JobStateUp: 4,
}}
t.Assert(watcher.WaitFor(jobEvents, scaleTimeout, nil), c.IsNil)
assertHostJobCounts(map[string]int{host2.ID(): 4})
assertStateCounts(map[ct.JobState]int{ct.JobStateUp: 4, ct.JobStateDown: 10})
// scale down stops the jobs
debug(t, "scaling printer=0")
formation.Processes = nil
t.Assert(client.PutFormation(formation), c.IsNil)
t.Assert(watcher.WaitFor(ct.JobEvents{"printer": ct.JobDownEvents(4)}, scaleTimeout, nil), c.IsNil)
assertStateCounts(map[ct.JobState]int{ct.JobStateDown: 14})
}
func (d *DeployJob) deployOneByOneWithWaitFn(waitJobs WaitJobsFn) error {
log := d.logger.New("fn", "deployOneByOne")
log.Info("starting one-by-one deployment")
oldScale := make(map[string]int, len(d.oldReleaseState))
for typ, count := range d.oldReleaseState {
oldScale[typ] = count
if d.isOmni(typ) {
oldScale[typ] /= d.hostCount
}
}
newScale := make(map[string]int, len(d.newReleaseState))
for typ, count := range d.newReleaseState {
newScale[typ] = count
if d.isOmni(typ) {
newScale[typ] /= d.hostCount
}
}
processTypes := make([]string, 0, len(d.Processes))
for typ := range d.Processes {
processTypes = append(processTypes, typ)
}
sort.Sort(sort.StringSlice(processTypes))
olog := log.New("release_id", d.OldReleaseID)
nlog := log.New("release_id", d.NewReleaseID)
for _, typ := range processTypes {
num := d.Processes[typ]
// don't scale processes which no longer exist in the new release
if _, ok := d.newRelease.Processes[typ]; !ok {
num = 0
}
diff := 1
if d.isOmni(typ) {
diff = d.hostCount
}
for i := newScale[typ]; i < num; i++ {
nlog.Info("scaling new formation up by one", "type", typ)
newScale[typ]++
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.NewReleaseID,
Processes: newScale,
}); err != nil {
nlog.Error("error scaling new formation up by one", "type", typ, "err", err)
return err
}
nlog.Info(fmt.Sprintf("waiting for %d job up event(s)", diff), "type", typ)
if err := waitJobs(d.NewReleaseID, ct.JobEvents{typ: ct.JobUpEvents(diff)}, nlog); err != nil {
nlog.Error("error waiting for job up events", "err", err)
return err
}
olog.Info("scaling old formation down by one", "type", typ)
oldScale[typ]--
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.OldReleaseID,
Processes: oldScale,
}); err != nil {
olog.Error("error scaling old formation down by one", "type", typ, "err", err)
return err
}
olog.Info(fmt.Sprintf("waiting for %d job down event(s)", diff), "type", typ)
if err := waitJobs(d.OldReleaseID, ct.JobEvents{typ: ct.JobDownEvents(diff)}, olog); err != nil {
olog.Error("error waiting for job down events", "err", err)
return err
}
}
}
// ensure any old leftover jobs are stopped (this can happen when new
// workers continue deployments from old workers and still see the
// old worker running even though it has been scaled down), returning
// ErrSkipRollback if an error occurs (rolling back doesn't make a ton
// of sense because it involves stopping the new working jobs).
log.Info("ensuring old formation is scaled down to zero")
diff := make(ct.JobEvents, len(oldScale))
for typ, count := range oldScale {
if count > 0 {
diff[typ] = ct.JobDownEvents(count)
}
}
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.OldReleaseID,
}); err != nil {
log.Error("error scaling old formation down to zero", "err", err)
return ErrSkipRollback{err.Error()}
}
// treat the deployment as finished now (rather than potentially
// waiting for the jobs to actually stop) as we can trust that the
// scheduler will actually kill the jobs, so no need to delay the
// deployment.
log.Info("finished one-by-one deployment")
return nil
}
func (d *DeployJob) deployAllAtOnce() error {
log := d.logger.New("fn", "deployAllAtOnce")
log.Info("starting all-at-once deployment")
expected := make(ct.JobEvents)
newProcs := make(map[string]int, len(d.Processes))
for typ, n := range d.Processes {
// ignore processes which no longer exist in the new
// release
if _, ok := d.newRelease.Processes[typ]; !ok {
continue
}
newProcs[typ] = n
total := n
if d.isOmni(typ) {
total *= d.hostCount
}
existing := d.newReleaseState[typ]
for i := existing; i < total; i++ {
d.deployEvents <- ct.DeploymentEvent{
ReleaseID: d.NewReleaseID,
JobState: ct.JobStateStarting,
JobType: typ,
}
}
if total > existing {
expected[typ] = ct.JobUpEvents(total - existing)
}
}
if expected.Count() > 0 {
log := log.New("release_id", d.NewReleaseID)
log.Info("creating new formation", "processes", newProcs)
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.NewReleaseID,
Processes: newProcs,
}); err != nil {
log.Error("error creating new formation", "err", err)
return err
}
log.Info("waiting for job events", "expected", expected)
if err := d.waitForJobEvents(d.NewReleaseID, expected, log); err != nil {
log.Error("error waiting for job events", "err", err)
return err
}
}
expected = make(ct.JobEvents)
for typ := range d.Processes {
existing := d.oldReleaseState[typ]
for i := 0; i < existing; i++ {
d.deployEvents <- ct.DeploymentEvent{
ReleaseID: d.OldReleaseID,
JobState: ct.JobStateStopping,
JobType: typ,
}
}
if existing > 0 {
expected[typ] = ct.JobDownEvents(existing)
}
}
// the new jobs have now started and they are up, so return
// ErrSkipRollback from here on out if an error occurs (rolling
// back doesn't make a ton of sense because it involves
// stopping the new working jobs).
log = log.New("release_id", d.OldReleaseID)
log.Info("scaling old formation to zero")
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.OldReleaseID,
}); err != nil {
log.Error("error scaling old formation to zero", "err", err)
return ErrSkipRollback{err.Error()}
}
if expected.Count() > 0 {
log.Info("waiting for job events", "expected", expected)
if err := d.waitForJobEvents(d.OldReleaseID, expected, log); err != nil {
log.Error("error waiting for job events", "err", err)
return ErrSkipRollback{err.Error()}
}
}
log.Info("finished all-at-once deployment")
return nil
}
func (d *DeployJob) deployAllAtOnce() error {
log := d.logger.New("fn", "deployAllAtOnce")
log.Info("starting all-at-once deployment")
expected := make(ct.JobEvents)
newProcs := make(map[string]int, len(d.Processes))
for typ, n := range d.Processes {
// ignore processes which no longer exist in the new
// release
if _, ok := d.newRelease.Processes[typ]; !ok {
continue
}
newProcs[typ] = n
total := n
if d.isOmni(typ) {
total *= d.hostCount
}
existing := d.newReleaseState[typ]
if total > existing {
expected[typ] = ct.JobUpEvents(total - existing)
}
}
if expected.Count() > 0 {
log := log.New("release_id", d.NewReleaseID)
log.Info("creating new formation", "processes", newProcs)
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.NewReleaseID,
Processes: newProcs,
}); err != nil {
log.Error("error creating new formation", "err", err)
return err
}
log.Info("waiting for job events", "expected", expected)
if err := d.waitForJobEvents(d.NewReleaseID, expected, log); err != nil {
log.Error("error waiting for job events", "err", err)
return err
}
}
expected = make(ct.JobEvents)
for typ := range d.Processes {
if existing := d.oldReleaseState[typ]; existing > 0 {
expected[typ] = ct.JobDownEvents(existing)
}
}
log = log.New("release_id", d.OldReleaseID)
log.Info("scaling old formation to zero")
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.OldReleaseID,
}); err != nil {
// the new jobs have now started and they are up, so return
// ErrSkipRollback (rolling back doesn't make a ton of sense
// because it involves stopping the new working jobs).
log.Error("error scaling old formation to zero", "err", err)
return ErrSkipRollback{err.Error()}
}
// treat the deployment as finished now (rather than waiting for the
// jobs to actually stop) as we can trust that the scheduler will
// actually kill the jobs, so no need to delay the deployment.
log.Info("finished all-at-once deployment")
return nil
}
func (d *DeployJob) deployOneByOneWithWaitFn(waitJobs WaitJobsFn) error {
log := d.logger.New("fn", "deployOneByOne")
log.Info("starting one-by-one deployment")
oldScale := make(map[string]int, len(d.oldReleaseState))
for typ, count := range d.oldReleaseState {
oldScale[typ] = count
if d.isOmni(typ) {
oldScale[typ] /= d.hostCount
}
}
newScale := make(map[string]int, len(d.newReleaseState))
for typ, count := range d.newReleaseState {
newScale[typ] = count
if d.isOmni(typ) {
newScale[typ] /= d.hostCount
}
}
processTypes := make([]string, 0, len(d.Processes))
for typ := range d.Processes {
processTypes = append(processTypes, typ)
}
sort.Sort(sort.StringSlice(processTypes))
olog := log.New("release_id", d.OldReleaseID)
nlog := log.New("release_id", d.NewReleaseID)
for _, typ := range processTypes {
num := d.Processes[typ]
diff := 1
if d.isOmni(typ) {
diff = d.hostCount
}
for i := newScale[typ]; i < num; i++ {
nlog.Info("scaling new formation up by one", "type", typ)
newScale[typ]++
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.NewReleaseID,
Processes: newScale,
}); err != nil {
nlog.Error("error scaling new formation up by one", "type", typ, "err", err)
return err
}
for i := 0; i < diff; i++ {
d.deployEvents <- ct.DeploymentEvent{
ReleaseID: d.NewReleaseID,
JobState: ct.JobStateStarting,
JobType: typ,
}
}
nlog.Info(fmt.Sprintf("waiting for %d job up event(s)", diff), "type", typ)
if err := waitJobs(d.NewReleaseID, ct.JobEvents{typ: ct.JobUpEvents(diff)}, nlog); err != nil {
nlog.Error("error waiting for job up events", "err", err)
return err
}
olog.Info("scaling old formation down by one", "type", typ)
oldScale[typ]--
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.OldReleaseID,
Processes: oldScale,
}); err != nil {
olog.Error("error scaling old formation down by one", "type", typ, "err", err)
return err
}
for i := 0; i < diff; i++ {
d.deployEvents <- ct.DeploymentEvent{
ReleaseID: d.OldReleaseID,
JobState: ct.JobStateStopping,
JobType: typ,
}
}
olog.Info(fmt.Sprintf("waiting for %d job down event(s)", diff), "type", typ)
if err := waitJobs(d.OldReleaseID, ct.JobEvents{typ: ct.JobDownEvents(diff)}, olog); err != nil {
olog.Error("error waiting for job down events", "err", err)
return err
}
}
}
// ensure any old leftover jobs are stopped (this can happen when new
// workers continue deployments from old workers and still see the
// old worker running even though it has been scaled down).
log.Info("ensuring old formation is scaled down to zero")
diff := make(ct.JobEvents, len(oldScale))
for typ, count := range oldScale {
diff[typ] = ct.JobDownEvents(count)
}
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.OldReleaseID,
}); err != nil {
log.Error("error scaling old formation down to zero", "err", err)
return err
}
if diff.Count() > 0 {
log.Info(fmt.Sprintf("waiting for %d job down event(s)", diff.Count()))
if err := d.waitForJobEvents(d.OldReleaseID, diff, log); err != nil {
log.Error("error waiting for job down events", "err", err)
return err
}
}
log.Info("finished one-by-one deployment")
return nil
}
func (d *DeployJob) deployAllAtOnce() error {
log := d.logger.New("fn", "deployAllAtOnce")
log.Info("starting all-at-once deployment")
expected := make(ct.JobEvents)
for typ, n := range d.Processes {
total := n
if d.isOmni(typ) {
total *= d.hostCount
}
existing := d.newReleaseState[typ]
for i := existing; i < total; i++ {
d.deployEvents <- ct.DeploymentEvent{
ReleaseID: d.NewReleaseID,
JobState: ct.JobStateStarting,
JobType: typ,
}
}
if total > existing {
expected[typ] = ct.JobUpEvents(total - existing)
}
}
if expected.Count() > 0 {
log := log.New("release_id", d.NewReleaseID)
log.Info("creating new formation", "processes", d.Processes)
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.NewReleaseID,
Processes: d.Processes,
}); err != nil {
log.Error("error creating new formation", "err", err)
return err
}
log.Info("waiting for job events", "expected", expected)
if err := d.waitForJobEvents(d.NewReleaseID, expected, log); err != nil {
log.Error("error waiting for job events", "err", err)
return err
}
}
expected = make(ct.JobEvents)
for typ := range d.Processes {
existing := d.oldReleaseState[typ]
for i := 0; i < existing; i++ {
d.deployEvents <- ct.DeploymentEvent{
ReleaseID: d.OldReleaseID,
JobState: ct.JobStateStopping,
JobType: typ,
}
}
if existing > 0 {
expected[typ] = ct.JobDownEvents(existing)
}
}
log = log.New("release_id", d.OldReleaseID)
log.Info("scaling old formation to zero")
if err := d.client.PutFormation(&ct.Formation{
AppID: d.AppID,
ReleaseID: d.OldReleaseID,
}); err != nil {
log.Error("error scaling old formation to zero", "err", err)
return err
}
if expected.Count() > 0 {
log.Info("waiting for job events", "expected", expected)
if err := d.waitForJobEvents(d.OldReleaseID, expected, log); err != nil {
log.Error("error waiting for job events", "err", err)
// we have started the new jobs (and they are up) and requested that the old jobs stop. at this point
// there's not much more we can do. Rolling back doesn't make a ton of sense because it involves
// stopping the new (working) jobs.
return ErrSkipRollback{err.Error()}
}
}
log.Info("finished all-at-once deployment")
return nil
}
func (s *SchedulerSuite) TestGracefulShutdown(t *c.C) {
app, release := s.createApp(t)
client := s.controllerClient(t)
debug(t, "scaling to blocker=1")
watcher, err := client.WatchJobEvents(app.ID, release.ID)
t.Assert(err, c.IsNil)
defer watcher.Close()
t.Assert(client.PutFormation(&ct.Formation{
AppID: app.ID,
ReleaseID: release.ID,
Processes: map[string]int{"blocker": 1},
}), c.IsNil)
var jobID string
err = watcher.WaitFor(ct.JobEvents{"blocker": ct.JobUpEvents(1)}, scaleTimeout, func(job *ct.Job) error {
jobID = job.ID
return nil
})
t.Assert(err, c.IsNil)
jobs, err := s.discoverdClient(t).Instances("test-http-blocker", 10*time.Second)
t.Assert(err, c.IsNil)
t.Assert(jobs, c.HasLen, 1)
jobAddr := jobs[0].Addr
debug(t, "subscribing to backend events from all routers")
routers, err := s.discoverdClient(t).Instances("router-api", 10*time.Second)
t.Assert(err, c.IsNil)
routerEvents := make(chan *router.StreamEvent)
for _, r := range routers {
events := make(chan *router.StreamEvent)
stream, err := routerc.NewWithAddr(r.Addr).StreamEvents(&router.StreamEventsOptions{
EventTypes: []router.EventType{
router.EventTypeBackendUp,
router.EventTypeBackendDown,
router.EventTypeBackendDrained,
},
}, events)
t.Assert(err, c.IsNil)
defer stream.Close()
go func(router *discoverd.Instance) {
for event := range events {
if event.Backend != nil && event.Backend.JobID == jobID {
debugf(t, "got %s router event from %s", event.Event, router.Host())
routerEvents <- event
}
}
}(r)
}
debug(t, "adding HTTP route with backend drain enabled")
route := &router.HTTPRoute{
Domain: random.String(32) + ".com",
Service: "test-http-blocker",
DrainBackends: true,
}
t.Assert(client.CreateRoute(app.ID, route.ToRoute()), c.IsNil)
waitForRouterEvents := func(typ router.EventType) {
debugf(t, "waiting for %d router %s events", len(routers), typ)
count := 0
for {
select {
case event := <-routerEvents:
if event.Event != typ {
t.Fatal("expected %s router event, got %s", typ, event.Event)
}
count++
if count == len(routers) {
return
}
case <-time.After(30 * time.Second):
t.Fatalf("timed out waiting for router %s events", typ)
}
}
}
waitForRouterEvents(router.EventTypeBackendUp)
debug(t, "making blocked HTTP request through each router")
reqErrs := make(chan error)
for _, router := range routers {
req, err := http.NewRequest("GET", "http://"+router.Host()+"/block", nil)
t.Assert(err, c.IsNil)
req.Host = route.Domain
res, err := http.DefaultClient.Do(req)
t.Assert(err, c.IsNil)
t.Assert(res.StatusCode, c.Equals, http.StatusOK)
go func() {
defer res.Body.Close()
data, err := ioutil.ReadAll(res.Body)
if err == nil && !bytes.Equal(data, []byte("done")) {
err = fmt.Errorf("unexpected response: %q", data)
}
reqErrs <- err
}()
}
debug(t, "scaling to blocker=0")
t.Assert(client.PutFormation(&ct.Formation{
AppID: app.ID,
ReleaseID: release.ID,
Processes: map[string]int{"blocker": 0},
}), c.IsNil)
t.Assert(watcher.WaitFor(ct.JobEvents{"blocker": {ct.JobStateStopping: 1}}, scaleTimeout, nil), c.IsNil)
waitForRouterEvents(router.EventTypeBackendDown)
debug(t, "checking new HTTP requests return 503")
for _, router := range routers {
req, err := http.NewRequest("GET", "http://"+router.Host()+"/ping", nil)
t.Assert(err, c.IsNil)
req.Host = route.Domain
res, err := http.DefaultClient.Do(req)
t.Assert(err, c.IsNil)
res.Body.Close()
t.Assert(res.StatusCode, c.Equals, http.StatusServiceUnavailable)
}
debug(t, "checking blocked HTTP requests are still blocked")
select {
case err := <-reqErrs:
t.Fatal(err)
default:
}
debug(t, "unblocking HTTP requests")
res, err := http.Get("http://" + jobAddr + "/unblock")
t.Assert(err, c.IsNil)
t.Assert(res.StatusCode, c.Equals, http.StatusOK)
debug(t, "checking the blocked HTTP requests completed without error")
for range routers {
if err := <-reqErrs; err != nil {
t.Fatal(err)
}
}
waitForRouterEvents(router.EventTypeBackendDrained)
debug(t, "waiting for the job to exit")
t.Assert(watcher.WaitFor(ct.JobEvents{"blocker": ct.JobDownEvents(1)}, scaleTimeout, nil), c.IsNil)
}
func (s *SchedulerSuite) TestDeployController(t *c.C) {
// get the current controller release
client := s.controllerClient(t)
app, err := client.GetApp("controller")
t.Assert(err, c.IsNil)
release, err := client.GetAppRelease(app.ID)
t.Assert(err, c.IsNil)
// get the current controller formation
formation, err := client.GetFormation(app.ID, release.ID)
t.Assert(err, c.IsNil)
// watch job events of the current release so we can wait for down
// events later
watcher, err := client.WatchJobEvents(app.Name, release.ID)
t.Assert(err, c.IsNil)
defer watcher.Close()
// create a controller deployment
release.ID = ""
t.Assert(client.CreateRelease(release), c.IsNil)
deployment, err := client.CreateDeployment(app.ID, release.ID)
t.Assert(err, c.IsNil)
events := make(chan *ct.DeploymentEvent)
eventStream, err := client.StreamDeployment(deployment, events)
t.Assert(err, c.IsNil)
defer eventStream.Close()
// wait for the deploy to complete (this doesn't wait for specific events
// due to the fact that when the deployer deploys itself, some events will
// not get sent)
loop:
for {
select {
case e, ok := <-events:
if !ok {
t.Fatal("unexpected close of deployment event stream")
}
debugf(t, "got deployment %s event", e.Status)
switch e.Status {
case "complete":
break loop
case "failed":
t.Fatal("the deployment failed")
}
case <-time.After(time.Duration(app.DeployTimeout) * time.Second):
t.Fatal("timed out waiting for the deploy to complete")
}
}
// wait for the old release to be fully scaled down
hosts, err := s.clusterClient(t).Hosts()
t.Assert(err, c.IsNil)
t.Assert(hosts, c.Not(c.HasLen), 0)
err = watcher.WaitFor(ct.JobEvents{
"web": ct.JobDownEvents(formation.Processes["web"]),
"worker": ct.JobDownEvents(formation.Processes["worker"]),
"scheduler": ct.JobDownEvents(len(hosts)),
}, scaleTimeout, nil)
t.Assert(err, c.IsNil)
// check the correct controller jobs are running
actual := make(map[string]map[string]int)
for _, h := range hosts {
jobs, err := h.ListJobs()
t.Assert(err, c.IsNil)
for _, job := range jobs {
if job.Status != host.StatusRunning {
continue
}
appID := job.Job.Metadata["flynn-controller.app"]
if appID != app.ID {
continue
}
releaseID := job.Job.Metadata["flynn-controller.release"]
if _, ok := actual[releaseID]; !ok {
actual[releaseID] = make(map[string]int)
}
typ := job.Job.Metadata["flynn-controller.type"]
actual[releaseID][typ]++
}
}
expected := map[string]map[string]int{release.ID: {
"web": formation.Processes["web"],
"worker": formation.Processes["worker"],
"scheduler": len(hosts),
}}
t.Assert(actual, c.DeepEquals, expected)
}