// Test to create the scheduler plugin with the config returned by the scheduler,
// and play through the whole life cycle of the plugin while creating pods, deleting
// and failing them.
func TestPlugin_LifeCycle(t *testing.T) {
t.Skip("This test is flaky, see #11901")
assert := &EventAssertions{*assert.New(t)}
// create a fake pod watch. We use that below to submit new pods to the scheduler
podListWatch := NewMockPodsListWatch(api.PodList{})
// create fake apiserver
testApiServer := NewTestServer(t, api.NamespaceDefault, podListWatch)
defer testApiServer.server.Close()
// create executor with some data for static pods if set
executor := util.NewExecutorInfo(
util.NewExecutorID("executor-id"),
util.NewCommandInfo("executor-cmd"),
)
executor.Data = []byte{0, 1, 2}
// create scheduler
nodeStore := cache.NewStore(cache.MetaNamespaceKeyFunc)
as := NewAllocationStrategy(
podtask.DefaultPredicate,
podtask.NewDefaultProcurement(mresource.DefaultDefaultContainerCPULimit, mresource.DefaultDefaultContainerMemLimit))
testScheduler := New(Config{
Executor: executor,
Client: client.NewOrDie(&client.Config{Host: testApiServer.server.URL, Version: testapi.Default.Version()}),
Scheduler: NewFCFSPodScheduler(as, func(node string) *api.Node {
obj, _, _ := nodeStore.GetByKey(node)
if obj == nil {
return nil
}
return obj.(*api.Node)
}),
Schedcfg: *schedcfg.CreateDefaultConfig(),
})
assert.NotNil(testScheduler.client, "client is nil")
assert.NotNil(testScheduler.executor, "executor is nil")
assert.NotNil(testScheduler.offers, "offer registry is nil")
// create scheduler process
schedulerProcess := ha.New(testScheduler)
// get plugin config from it
c := testScheduler.NewPluginConfig(schedulerProcess.Terminal(), http.DefaultServeMux, &podListWatch.ListWatch)
assert.NotNil(c)
// make events observable
eventObserver := NewEventObserver()
c.Recorder = eventObserver
// create plugin
p := NewPlugin(c).(*schedulingPlugin)
assert.NotNil(p)
// run plugin
p.Run(schedulerProcess.Terminal())
defer schedulerProcess.End()
// init scheduler
err := testScheduler.Init(schedulerProcess.Master(), p, http.DefaultServeMux)
assert.NoError(err)
// create mock mesos scheduler driver
mockDriver := &joinableDriver{}
mockDriver.On("Start").Return(mesos.Status_DRIVER_RUNNING, nil).Once()
started := mockDriver.Upon()
mAny := mock.AnythingOfType
mockDriver.On("ReconcileTasks", mAny("[]*mesosproto.TaskStatus")).Return(mesos.Status_DRIVER_RUNNING, nil)
mockDriver.On("SendFrameworkMessage", mAny("*mesosproto.ExecutorID"), mAny("*mesosproto.SlaveID"), mAny("string")).
Return(mesos.Status_DRIVER_RUNNING, nil)
type LaunchedTask struct {
offerId mesos.OfferID
taskInfo *mesos.TaskInfo
}
launchedTasks := make(chan LaunchedTask, 1)
launchTasksCalledFunc := func(args mock.Arguments) {
offerIDs := args.Get(0).([]*mesos.OfferID)
taskInfos := args.Get(1).([]*mesos.TaskInfo)
assert.Equal(1, len(offerIDs))
assert.Equal(1, len(taskInfos))
launchedTasks <- LaunchedTask{
offerId: *offerIDs[0],
taskInfo: taskInfos[0],
}
}
mockDriver.On("LaunchTasks", mAny("[]*mesosproto.OfferID"), mAny("[]*mesosproto.TaskInfo"), mAny("*mesosproto.Filters")).
Return(mesos.Status_DRIVER_RUNNING, nil).Run(launchTasksCalledFunc)
mockDriver.On("DeclineOffer", mAny("*mesosproto.OfferID"), mAny("*mesosproto.Filters")).
Return(mesos.Status_DRIVER_RUNNING, nil)
// elect master with mock driver
driverFactory := ha.DriverFactory(func() (bindings.SchedulerDriver, error) {
return mockDriver, nil
})
schedulerProcess.Elect(driverFactory)
elected := schedulerProcess.Elected()
// driver will be started
<-started
// tell scheduler to be registered
testScheduler.Registered(
mockDriver,
util.NewFrameworkID("kubernetes-id"),
util.NewMasterInfo("master-id", (192<<24)+(168<<16)+(0<<8)+1, 5050),
)
// wait for being elected
<-elected
//TODO(jdef) refactor things above here into a test suite setup of some sort
// fake new, unscheduled pod
pod, i := NewTestPod()
podListWatch.Add(pod, true) // notify watchers
// wait for failedScheduling event because there is no offer
assert.EventWithReason(eventObserver, "failedScheduling", "failedScheduling event not received")
// add some matching offer
offers := []*mesos.Offer{NewTestOffer(fmt.Sprintf("offer%d", i))}
testScheduler.ResourceOffers(nil, offers)
// and wait for scheduled pod
assert.EventWithReason(eventObserver, "scheduled")
select {
case launchedTask := <-launchedTasks:
// report back that the task has been staged, and then started by mesos
testScheduler.StatusUpdate(mockDriver, newTaskStatusForTask(launchedTask.taskInfo, mesos.TaskState_TASK_STAGING))
testScheduler.StatusUpdate(mockDriver, newTaskStatusForTask(launchedTask.taskInfo, mesos.TaskState_TASK_RUNNING))
// check that ExecutorInfo.data has the static pod data
assert.Len(launchedTask.taskInfo.Executor.Data, 3)
// report back that the task has been lost
mockDriver.AssertNumberOfCalls(t, "SendFrameworkMessage", 0)
testScheduler.StatusUpdate(mockDriver, newTaskStatusForTask(launchedTask.taskInfo, mesos.TaskState_TASK_LOST))
// and wait that framework message is sent to executor
mockDriver.AssertNumberOfCalls(t, "SendFrameworkMessage", 1)
case <-time.After(5 * time.Second):
t.Fatalf("timed out waiting for launchTasks call")
}
// Launch a pod and wait until the scheduler driver is called
schedulePodWithOffers := func(pod *api.Pod, offers []*mesos.Offer) (*api.Pod, *LaunchedTask, *mesos.Offer) {
// wait for failedScheduling event because there is no offer
assert.EventWithReason(eventObserver, "failedScheduling", "failedScheduling event not received")
// supply a matching offer
testScheduler.ResourceOffers(mockDriver, offers)
// and wait to get scheduled
assert.EventWithReason(eventObserver, "scheduled")
// wait for driver.launchTasks call
select {
case launchedTask := <-launchedTasks:
for _, offer := range offers {
if offer.Id.GetValue() == launchedTask.offerId.GetValue() {
return pod, &launchedTask, offer
}
}
t.Fatalf("unknown offer used to start a pod")
return nil, nil, nil
case <-time.After(5 * time.Second):
t.Fatal("timed out waiting for launchTasks")
return nil, nil, nil
}
}
// Launch a pod and wait until the scheduler driver is called
launchPodWithOffers := func(pod *api.Pod, offers []*mesos.Offer) (*api.Pod, *LaunchedTask, *mesos.Offer) {
podListWatch.Add(pod, true)
return schedulePodWithOffers(pod, offers)
}
// Launch a pod, wait until the scheduler driver is called and report back that it is running
startPodWithOffers := func(pod *api.Pod, offers []*mesos.Offer) (*api.Pod, *LaunchedTask, *mesos.Offer) {
// notify about pod, offer resources and wait for scheduling
pod, launchedTask, offer := launchPodWithOffers(pod, offers)
if pod != nil {
// report back status
testScheduler.StatusUpdate(mockDriver, newTaskStatusForTask(launchedTask.taskInfo, mesos.TaskState_TASK_STAGING))
testScheduler.StatusUpdate(mockDriver, newTaskStatusForTask(launchedTask.taskInfo, mesos.TaskState_TASK_RUNNING))
return pod, launchedTask, offer
}
return nil, nil, nil
}
startTestPod := func() (*api.Pod, *LaunchedTask, *mesos.Offer) {
pod, i := NewTestPod()
offers := []*mesos.Offer{NewTestOffer(fmt.Sprintf("offer%d", i))}
return startPodWithOffers(pod, offers)
}
// start another pod
pod, launchedTask, _ := startTestPod()
// mock drvier.KillTask, should be invoked when a pod is deleted
mockDriver.On("KillTask", mAny("*mesosproto.TaskID")).Return(mesos.Status_DRIVER_RUNNING, nil).Run(func(args mock.Arguments) {
killedTaskId := *(args.Get(0).(*mesos.TaskID))
assert.Equal(*launchedTask.taskInfo.TaskId, killedTaskId, "expected same TaskID as during launch")
})
killTaskCalled := mockDriver.Upon()
// stop it again via the apiserver mock
podListWatch.Delete(pod, true) // notify watchers
// and wait for the driver killTask call with the correct TaskId
select {
case <-killTaskCalled:
// report back that the task is finished
testScheduler.StatusUpdate(mockDriver, newTaskStatusForTask(launchedTask.taskInfo, mesos.TaskState_TASK_FINISHED))
case <-time.After(5 * time.Second):
t.Fatal("timed out waiting for KillTask")
}
// start a pod with on a given NodeName and check that it is scheduled to the right host
pod, i = NewTestPod()
pod.Spec.NodeName = "hostname1"
offers = []*mesos.Offer{}
for j := 0; j < 3; j++ {
offer := NewTestOffer(fmt.Sprintf("offer%d_%d", i, j))
hostname := fmt.Sprintf("hostname%d", j)
offer.Hostname = &hostname
offers = append(offers, offer)
}
_, _, usedOffer := startPodWithOffers(pod, offers)
assert.Equal(offers[1].Id.GetValue(), usedOffer.Id.GetValue())
assert.Equal(pod.Spec.NodeName, *usedOffer.Hostname)
testScheduler.OfferRescinded(mockDriver, offers[0].Id)
testScheduler.OfferRescinded(mockDriver, offers[2].Id)
// start pods:
// - which are failing while binding,
// - leading to reconciliation
// - with different states on the apiserver
failPodFromExecutor := func(task *mesos.TaskInfo) {
beforePodLookups := testApiServer.Stats(pod.Name)
status := newTaskStatusForTask(task, mesos.TaskState_TASK_FAILED)
message := messages.CreateBindingFailure
status.Message = &message
testScheduler.StatusUpdate(mockDriver, status)
// wait until pod is looked up at the apiserver
assertext.EventuallyTrue(t, time.Second, func() bool {
return testApiServer.Stats(pod.Name) == beforePodLookups+1
}, "expect that reconcileTask will access apiserver for pod %v", pod.Name)
}
launchTestPod := func() (*api.Pod, *LaunchedTask, *mesos.Offer) {
pod, i := NewTestPod()
offers := []*mesos.Offer{NewTestOffer(fmt.Sprintf("offer%d", i))}
return launchPodWithOffers(pod, offers)
}
// 1. with pod deleted from the apiserver
// expected: pod is removed from internal task registry
pod, launchedTask, _ = launchTestPod()
podListWatch.Delete(pod, false) // not notifying the watchers
failPodFromExecutor(launchedTask.taskInfo)
podKey, _ := podtask.MakePodKey(api.NewDefaultContext(), pod.Name)
assertext.EventuallyTrue(t, time.Second, func() bool {
t, _ := p.api.tasks().ForPod(podKey)
return t == nil
})
// 2. with pod still on the apiserver, not bound
// expected: pod is rescheduled
pod, launchedTask, _ = launchTestPod()
failPodFromExecutor(launchedTask.taskInfo)
retryOffers := []*mesos.Offer{NewTestOffer("retry-offer")}
schedulePodWithOffers(pod, retryOffers)
// 3. with pod still on the apiserver, bound, notified via ListWatch
// expected: nothing, pod updates not supported, compare ReconcileTask function
pod, launchedTask, usedOffer = startTestPod()
pod.Annotations = map[string]string{
meta.BindingHostKey: *usedOffer.Hostname,
}
pod.Spec.NodeName = *usedOffer.Hostname
podListWatch.Modify(pod, true) // notifying the watchers
time.Sleep(time.Second / 2)
failPodFromExecutor(launchedTask.taskInfo)
}
func (lt lifecycleTest) Start() <-chan LaunchedTask {
assert := &EventAssertions{*assert.New(lt.t)}
lt.sched.Run(lt.schedulerProc.Terminal())
// init framework
err := lt.framework.Init(
lt.sched,
lt.schedulerProc.Master(),
http.DefaultServeMux,
)
assert.NoError(err)
lt.driver.On("Start").Return(mesos.Status_DRIVER_RUNNING, nil).Once()
started := lt.driver.Upon()
lt.driver.On("ReconcileTasks",
mock.AnythingOfType("[]*mesosproto.TaskStatus"),
).Return(mesos.Status_DRIVER_RUNNING, nil)
lt.driver.On("SendFrameworkMessage",
mock.AnythingOfType("*mesosproto.ExecutorID"),
mock.AnythingOfType("*mesosproto.SlaveID"),
mock.AnythingOfType("string"),
).Return(mesos.Status_DRIVER_RUNNING, nil)
launchedTasks := make(chan LaunchedTask, 1)
launchTasksFunc := func(args mock.Arguments) {
offerIDs := args.Get(0).([]*mesos.OfferID)
taskInfos := args.Get(1).([]*mesos.TaskInfo)
assert.Equal(1, len(offerIDs))
assert.Equal(1, len(taskInfos))
launchedTasks <- LaunchedTask{
offerId: *offerIDs[0],
taskInfo: taskInfos[0],
}
}
lt.driver.On("LaunchTasks",
mock.AnythingOfType("[]*mesosproto.OfferID"),
mock.AnythingOfType("[]*mesosproto.TaskInfo"),
mock.AnythingOfType("*mesosproto.Filters"),
).Return(mesos.Status_DRIVER_RUNNING, nil).Run(launchTasksFunc)
lt.driver.On("DeclineOffer",
mock.AnythingOfType("*mesosproto.OfferID"),
mock.AnythingOfType("*mesosproto.Filters"),
).Return(mesos.Status_DRIVER_RUNNING, nil)
// elect master with mock driver
driverFactory := ha.DriverFactory(func() (bindings.SchedulerDriver, error) {
return lt.driver, nil
})
lt.schedulerProc.Elect(driverFactory)
elected := lt.schedulerProc.Elected()
// driver will be started
<-started
// tell scheduler to be registered
lt.framework.Registered(
lt.driver,
mesosutil.NewFrameworkID("kubernetes-id"),
mesosutil.NewMasterInfo("master-id", (192<<24)+(168<<16)+(0<<8)+1, 5050),
)
// wait for being elected
<-elected
return launchedTasks
}
func (s *SchedulerServer) bootstrap(hks hyperkube.Interface, sc *schedcfg.Config) (*ha.SchedulerProcess, ha.DriverFactory, etcd.Client, *mesos.ExecutorID) {
s.frameworkName = strings.TrimSpace(s.frameworkName)
if s.frameworkName == "" {
log.Fatalf("framework-name must be a non-empty string")
}
s.frameworkWebURI = strings.TrimSpace(s.frameworkWebURI)
metrics.Register()
runtime.Register()
s.mux.Handle("/metrics", prometheus.Handler())
healthz.InstallHandler(s.mux)
if len(s.etcdServerList) == 0 {
log.Fatalf("specify --etcd-servers must be specified")
}
if len(s.apiServerList) < 1 {
log.Fatal("No api servers specified.")
}
clientConfig, err := s.createAPIServerClientConfig()
if err != nil {
log.Fatalf("Unable to make apiserver client config: %v", err)
}
s.client, err = clientset.NewForConfig(clientConfig)
if err != nil {
log.Fatalf("Unable to make apiserver clientset: %v", err)
}
if s.reconcileCooldown < defaultReconcileCooldown {
s.reconcileCooldown = defaultReconcileCooldown
log.Warningf("user-specified reconcile cooldown too small, defaulting to %v", s.reconcileCooldown)
}
eiPrototype, err := s.prepareExecutorInfo(hks)
if err != nil {
log.Fatalf("misconfigured executor: %v", err)
}
// TODO(jdef): remove the dependency on etcd as soon as
// (1) the generic config store is available for the FrameworkId storage
// (2) the generic master election is provided by the apiserver
// Compare docs/proposals/high-availability.md
etcdClient, err := newEtcd(s.etcdServerList)
if err != nil {
log.Fatalf("misconfigured etcd: %v", err)
}
keysAPI := etcd.NewKeysAPI(etcdClient)
// mirror all nodes into the nodeStore
var eiRegistry executorinfo.Registry
nodesClientConfig := *clientConfig
nodesClient, err := clientset.NewForConfig(&nodesClientConfig)
if err != nil {
log.Fatalf("Cannot create client to watch nodes: %v", err)
}
nodeLW := cache.NewListWatchFromClient(nodesClient.CoreClient, "nodes", api.NamespaceAll, fields.Everything())
nodeStore, nodeCtl := controllerfw.NewInformer(nodeLW, &api.Node{}, s.nodeRelistPeriod, &controllerfw.ResourceEventHandlerFuncs{
DeleteFunc: func(obj interface{}) {
if eiRegistry != nil {
// TODO(jdef) use controllerfw.DeletionHandlingMetaNamespaceKeyFunc at some point?
nodeName := ""
if tombstone, ok := obj.(cache.DeletedFinalStateUnknown); ok {
nodeName = tombstone.Key
} else if node, ok := obj.(*api.Node); ok {
nodeName = node.Name
}
if nodeName != "" {
log.V(2).Infof("deleting node %q from registry", nodeName)
eiRegistry.Invalidate(nodeName)
}
}
},
})
lookupNode := func(hostName string) *api.Node {
n, _, _ := nodeStore.GetByKey(hostName) // ignore error and return nil then
if n == nil {
return nil
}
return n.(*api.Node)
}
execInfoCache, err := executorinfo.NewCache(defaultExecutorInfoCacheSize)
if err != nil {
log.Fatalf("cannot create executorinfo cache: %v", err)
}
eiRegistry, err = executorinfo.NewRegistry(lookupNode, eiPrototype, execInfoCache)
if err != nil {
log.Fatalf("cannot create executorinfo registry: %v", err)
}
pr := podtask.NewDefaultProcurement(eiPrototype, eiRegistry)
fcfs := podschedulers.NewFCFSPodScheduler(pr, lookupNode)
frameworkIDStorage, err := s.frameworkIDStorage(keysAPI)
if err != nil {
log.Fatalf("cannot init framework ID storage: %v", err)
}
framework := framework.New(framework.Config{
SchedulerConfig: *sc,
Client: s.client,
FailoverTimeout: s.failoverTimeout,
ReconcileInterval: s.reconcileInterval,
ReconcileCooldown: s.reconcileCooldown,
LookupNode: lookupNode,
StoreFrameworkId: frameworkIDStorage.Set,
ExecutorId: eiPrototype.GetExecutorId(),
})
masterUri := s.mesosMaster
info, cred, err := s.buildFrameworkInfo()
if err != nil {
log.Fatalf("Misconfigured mesos framework: %v", err)
}
schedulerProcess := ha.New(framework)
// try publishing on the same IP as the slave
var publishedAddress net.IP
if libprocessIP := os.Getenv("LIBPROCESS_IP"); libprocessIP != "" {
publishedAddress = net.ParseIP(libprocessIP)
}
if publishedAddress != nil {
log.V(1).Infof("driver will publish address %v", publishedAddress)
}
dconfig := &bindings.DriverConfig{
Scheduler: schedulerProcess,
Framework: info,
Master: masterUri,
Credential: cred,
BindingAddress: s.address,
BindingPort: uint16(s.driverPort),
PublishedAddress: publishedAddress,
HostnameOverride: s.hostnameOverride,
WithAuthContext: func(ctx context.Context) context.Context {
ctx = auth.WithLoginProvider(ctx, s.mesosAuthProvider)
ctx = sasl.WithBindingAddress(ctx, s.address)
return ctx
},
}
// create event recorder sending events to the "" namespace of the apiserver
eventsClientConfig := *clientConfig
eventsClient, err := clientset.NewForConfig(&eventsClientConfig)
if err != nil {
log.Fatalf("Invalid API configuration: %v", err)
}
broadcaster := record.NewBroadcaster()
recorder := broadcaster.NewRecorder(api.EventSource{Component: api.DefaultSchedulerName})
broadcaster.StartLogging(log.Infof)
broadcaster.StartRecordingToSink(&unversionedcore.EventSinkImpl{Interface: eventsClient.Events("")})
lw := cache.NewListWatchFromClient(s.client.CoreClient, "pods", api.NamespaceAll, fields.Everything())
hostPortStrategy := hostport.StrategyFixed
if s.useHostPortEndpoints {
hostPortStrategy = hostport.StrategyWildcard
}
// create scheduler core with all components arranged around it
sched := components.New(
sc,
framework,
fcfs,
s.client,
recorder,
schedulerProcess.Terminal(),
s.mux,
lw,
podtask.Config{
DefaultPodRoles: s.defaultPodRoles,
FrameworkRoles: s.frameworkRoles,
GenerateTaskDiscoveryEnabled: s.generateTaskDiscovery,
HostPortStrategy: hostPortStrategy,
Prototype: eiPrototype,
},
s.defaultContainerCPULimit,
s.defaultContainerMemLimit,
)
runtime.On(framework.Registration(), func() { sched.Run(schedulerProcess.Terminal()) })
runtime.On(framework.Registration(), s.newServiceWriter(publishedAddress, schedulerProcess.Terminal()))
runtime.On(framework.Registration(), func() { nodeCtl.Run(schedulerProcess.Terminal()) })
driverFactory := ha.DriverFactory(func() (drv bindings.SchedulerDriver, err error) {
log.V(1).Infoln("performing deferred initialization")
if err = framework.Init(sched, schedulerProcess.Master(), s.mux); err != nil {
return nil, fmt.Errorf("failed to initialize pod scheduler: %v", err)
}
log.V(1).Infoln("deferred init complete")
if s.failoverTimeout > 0 {
// defer obtaining framework ID to prevent multiple schedulers
// from overwriting each other's framework IDs
var frameworkID string
frameworkID, err = frameworkIDStorage.Get(context.TODO())
if err != nil {
return nil, fmt.Errorf("failed to fetch framework ID from storage: %v", err)
}
if frameworkID != "" {
log.Infof("configuring FrameworkInfo with ID found in storage: %q", frameworkID)
dconfig.Framework.Id = &mesos.FrameworkID{Value: &frameworkID}
} else {
log.V(1).Infof("did not find framework ID in storage")
}
} else {
// TODO(jdef) this is a hack, really for development, to simplify clean up of old framework IDs
frameworkIDStorage.Remove(context.TODO())
}
log.V(1).Infoln("constructing mesos scheduler driver")
drv, err = bindings.NewMesosSchedulerDriver(*dconfig)
if err != nil {
return nil, fmt.Errorf("failed to construct scheduler driver: %v", err)
}
log.V(1).Infoln("constructed mesos scheduler driver:", drv)
s.setDriver(drv)
return drv, nil
})
return schedulerProcess, driverFactory, etcdClient, eiPrototype.GetExecutorId()
}
func (s *SchedulerServer) bootstrap(hks hyperkube.Interface, sc *schedcfg.Config) (*ha.SchedulerProcess, ha.DriverFactory, tools.EtcdClient, *uid.UID) {
s.FrameworkName = strings.TrimSpace(s.FrameworkName)
if s.FrameworkName == "" {
log.Fatalf("framework-name must be a non-empty string")
}
s.FrameworkWebURI = strings.TrimSpace(s.FrameworkWebURI)
metrics.Register()
runtime.Register()
s.mux.Handle("/metrics", prometheus.Handler())
healthz.InstallHandler(s.mux)
if (s.EtcdConfigFile != "" && len(s.EtcdServerList) != 0) || (s.EtcdConfigFile == "" && len(s.EtcdServerList) == 0) {
log.Fatalf("specify either --etcd-servers or --etcd-config")
}
if len(s.APIServerList) < 1 {
log.Fatal("No api servers specified.")
}
client, err := s.createAPIServerClient()
if err != nil {
log.Fatalf("Unable to make apiserver client: %v", err)
}
s.client = client
if s.ReconcileCooldown < defaultReconcileCooldown {
s.ReconcileCooldown = defaultReconcileCooldown
log.Warningf("user-specified reconcile cooldown too small, defaulting to %v", s.ReconcileCooldown)
}
executor, eid, err := s.prepareExecutorInfo(hks)
if err != nil {
log.Fatalf("misconfigured executor: %v", err)
}
// TODO(jdef): remove the dependency on etcd as soon as
// (1) the generic config store is available for the FrameworkId storage
// (2) the generic master election is provided by the apiserver
// Compare docs/proposals/high-availability.md
etcdClient, err := newEtcd(s.EtcdConfigFile, s.EtcdServerList)
if err != nil {
log.Fatalf("misconfigured etcd: %v", err)
}
as := scheduler.NewAllocationStrategy(
podtask.NewDefaultPredicate(
s.DefaultContainerCPULimit,
s.DefaultContainerMemLimit,
),
podtask.NewDefaultProcurement(
s.DefaultContainerCPULimit,
s.DefaultContainerMemLimit,
),
)
// downgrade allocation strategy if user disables "account-for-pod-resources"
if !s.AccountForPodResources {
as = scheduler.NewAllocationStrategy(
podtask.DefaultMinimalPredicate,
podtask.DefaultMinimalProcurement)
}
// mirror all nodes into the nodeStore
nodesClient, err := s.createAPIServerClient()
if err != nil {
log.Fatalf("Cannot create client to watch nodes: %v", err)
}
nodeStore := cache.NewStore(cache.MetaNamespaceKeyFunc)
nodeLW := cache.NewListWatchFromClient(nodesClient, "nodes", api.NamespaceAll, fields.Everything())
cache.NewReflector(nodeLW, &api.Node{}, nodeStore, s.nodeRelistPeriod).Run()
lookupNode := func(hostName string) *api.Node {
n, _, _ := nodeStore.GetByKey(hostName) // ignore error and return nil then
if n == nil {
return nil
}
return n.(*api.Node)
}
fcfs := scheduler.NewFCFSPodScheduler(as, lookupNode)
mesosPodScheduler := scheduler.New(scheduler.Config{
Schedcfg: *sc,
Executor: executor,
Scheduler: fcfs,
Client: client,
EtcdClient: etcdClient,
FailoverTimeout: s.FailoverTimeout,
ReconcileInterval: s.ReconcileInterval,
ReconcileCooldown: s.ReconcileCooldown,
LookupNode: lookupNode,
})
masterUri := s.MesosMaster
info, cred, err := s.buildFrameworkInfo()
if err != nil {
log.Fatalf("Misconfigured mesos framework: %v", err)
}
schedulerProcess := ha.New(mesosPodScheduler)
dconfig := &bindings.DriverConfig{
Scheduler: schedulerProcess,
Framework: info,
Master: masterUri,
Credential: cred,
BindingAddress: s.Address,
BindingPort: uint16(s.DriverPort),
HostnameOverride: s.HostnameOverride,
WithAuthContext: func(ctx context.Context) context.Context {
ctx = auth.WithLoginProvider(ctx, s.MesosAuthProvider)
ctx = sasl.WithBindingAddress(ctx, s.Address)
return ctx
},
}
kpl := scheduler.NewPlugin(mesosPodScheduler.NewDefaultPluginConfig(schedulerProcess.Terminal(), s.mux))
runtime.On(mesosPodScheduler.Registration(), func() { kpl.Run(schedulerProcess.Terminal()) })
runtime.On(mesosPodScheduler.Registration(), s.newServiceWriter(schedulerProcess.Terminal()))
driverFactory := ha.DriverFactory(func() (drv bindings.SchedulerDriver, err error) {
log.V(1).Infoln("performing deferred initialization")
if err = mesosPodScheduler.Init(schedulerProcess.Master(), kpl, s.mux); err != nil {
return nil, fmt.Errorf("failed to initialize pod scheduler: %v", err)
}
log.V(1).Infoln("deferred init complete")
// defer obtaining framework ID to prevent multiple schedulers
// from overwriting each other's framework IDs
dconfig.Framework.Id, err = s.fetchFrameworkID(etcdClient)
if err != nil {
return nil, fmt.Errorf("failed to fetch framework ID from etcd: %v", err)
}
log.V(1).Infoln("constructing mesos scheduler driver")
drv, err = bindings.NewMesosSchedulerDriver(*dconfig)
if err != nil {
return nil, fmt.Errorf("failed to construct scheduler driver: %v", err)
}
log.V(1).Infoln("constructed mesos scheduler driver:", drv)
s.setDriver(drv)
return drv, nil
})
return schedulerProcess, driverFactory, etcdClient, eid
}
func (s *SchedulerServer) bootstrap(hks hyperkube.Interface, sc *schedcfg.Config) (*ha.SchedulerProcess, ha.DriverFactory, tools.EtcdClient, *uid.UID) {
s.FrameworkName = strings.TrimSpace(s.FrameworkName)
if s.FrameworkName == "" {
log.Fatalf("framework-name must be a non-empty string")
}
s.FrameworkWebURI = strings.TrimSpace(s.FrameworkWebURI)
metrics.Register()
runtime.Register()
s.mux.Handle("/metrics", prometheus.Handler())
if (s.EtcdConfigFile != "" && len(s.EtcdServerList) != 0) || (s.EtcdConfigFile == "" && len(s.EtcdServerList) == 0) {
log.Fatalf("specify either --etcd-servers or --etcd-config")
}
if len(s.APIServerList) < 1 {
log.Fatal("No api servers specified.")
}
client, err := s.createAPIServerClient()
if err != nil {
log.Fatalf("Unable to make apiserver client: %v", err)
}
s.client = client
if s.ReconcileCooldown < defaultReconcileCooldown {
s.ReconcileCooldown = defaultReconcileCooldown
log.Warningf("user-specified reconcile cooldown too small, defaulting to %v", s.ReconcileCooldown)
}
executor, eid, err := s.prepareExecutorInfo(hks)
if err != nil {
log.Fatalf("misconfigured executor: %v", err)
}
// TODO(jdef): remove the dependency on etcd as soon as
// (1) the generic config store is available for the FrameworkId storage
// (2) the generic master election is provided by the apiserver
// Compare docs/proposals/high-availability.md
etcdClient, err := newEtcd(s.EtcdConfigFile, s.EtcdServerList)
if err != nil {
log.Fatalf("misconfigured etcd: %v", err)
}
mesosPodScheduler := scheduler.New(scheduler.Config{
Schedcfg: *sc,
Executor: executor,
ScheduleFunc: scheduler.FCFSScheduleFunc,
Client: client,
EtcdClient: etcdClient,
FailoverTimeout: s.FailoverTimeout,
ReconcileInterval: s.ReconcileInterval,
ReconcileCooldown: s.ReconcileCooldown,
DefaultContainerCPULimit: s.DefaultContainerCPULimit,
DefaultContainerMemLimit: s.DefaultContainerMemLimit,
})
masterUri := s.MesosMaster
info, cred, err := s.buildFrameworkInfo()
if err != nil {
log.Fatalf("Misconfigured mesos framework: %v", err)
}
schedulerProcess := ha.New(mesosPodScheduler)
dconfig := &bindings.DriverConfig{
Scheduler: schedulerProcess,
Framework: info,
Master: masterUri,
Credential: cred,
BindingAddress: net.IP(s.Address),
BindingPort: uint16(s.DriverPort),
HostnameOverride: s.HostnameOverride,
WithAuthContext: func(ctx context.Context) context.Context {
ctx = auth.WithLoginProvider(ctx, s.MesosAuthProvider)
ctx = sasl.WithBindingAddress(ctx, net.IP(s.Address))
return ctx
},
}
kpl := scheduler.NewPlugin(mesosPodScheduler.NewDefaultPluginConfig(schedulerProcess.Terminal(), s.mux))
runtime.On(mesosPodScheduler.Registration(), func() { kpl.Run(schedulerProcess.Terminal()) })
runtime.On(mesosPodScheduler.Registration(), s.newServiceWriter(schedulerProcess.Terminal()))
driverFactory := ha.DriverFactory(func() (drv bindings.SchedulerDriver, err error) {
log.V(1).Infoln("performing deferred initialization")
if err = mesosPodScheduler.Init(schedulerProcess.Master(), kpl, s.mux); err != nil {
return nil, fmt.Errorf("failed to initialize pod scheduler: %v", err)
}
log.V(1).Infoln("deferred init complete")
// defer obtaining framework ID to prevent multiple schedulers
// from overwriting each other's framework IDs
dconfig.Framework.Id, err = s.fetchFrameworkID(etcdClient)
if err != nil {
return nil, fmt.Errorf("failed to fetch framework ID from etcd: %v", err)
}
log.V(1).Infoln("constructing mesos scheduler driver")
drv, err = bindings.NewMesosSchedulerDriver(*dconfig)
if err != nil {
return nil, fmt.Errorf("failed to construct scheduler driver: %v", err)
}
log.V(1).Infoln("constructed mesos scheduler driver:", drv)
s.setDriver(drv)
return drv, nil
})
return schedulerProcess, driverFactory, etcdClient, eid
}
func (s *SchedulerServer) bootstrap(hks hyperkube.Interface, sc *schedcfg.Config) (*ha.SchedulerProcess, ha.DriverFactory, *etcd.Client, *mesos.ExecutorID) {
s.frameworkName = strings.TrimSpace(s.frameworkName)
if s.frameworkName == "" {
log.Fatalf("framework-name must be a non-empty string")
}
s.frameworkWebURI = strings.TrimSpace(s.frameworkWebURI)
metrics.Register()
runtime.Register()
s.mux.Handle("/metrics", prometheus.Handler())
healthz.InstallHandler(s.mux)
if (s.etcdConfigFile != "" && len(s.etcdServerList) != 0) || (s.etcdConfigFile == "" && len(s.etcdServerList) == 0) {
log.Fatalf("specify either --etcd-servers or --etcd-config")
}
if len(s.apiServerList) < 1 {
log.Fatal("No api servers specified.")
}
client, err := s.createAPIServerClient()
if err != nil {
log.Fatalf("Unable to make apiserver client: %v", err)
}
s.client = client
if s.reconcileCooldown < defaultReconcileCooldown {
s.reconcileCooldown = defaultReconcileCooldown
log.Warningf("user-specified reconcile cooldown too small, defaulting to %v", s.reconcileCooldown)
}
eiPrototype, err := s.prepareExecutorInfo(hks)
if err != nil {
log.Fatalf("misconfigured executor: %v", err)
}
// TODO(jdef): remove the dependency on etcd as soon as
// (1) the generic config store is available for the FrameworkId storage
// (2) the generic master election is provided by the apiserver
// Compare docs/proposals/high-availability.md
etcdClient, err := newEtcd(s.etcdConfigFile, s.etcdServerList)
if err != nil {
log.Fatalf("misconfigured etcd: %v", err)
}
// mirror all nodes into the nodeStore
var eiRegistry executorinfo.Registry
nodesClient, err := s.createAPIServerClient()
if err != nil {
log.Fatalf("Cannot create client to watch nodes: %v", err)
}
nodeLW := cache.NewListWatchFromClient(nodesClient, "nodes", api.NamespaceAll, fields.Everything())
nodeStore, nodeCtl := controllerfw.NewInformer(nodeLW, &api.Node{}, s.nodeRelistPeriod, &controllerfw.ResourceEventHandlerFuncs{
DeleteFunc: func(obj interface{}) {
node := obj.(*api.Node)
if eiRegistry != nil {
log.V(2).Infof("deleting node %q from registry", node.Name)
eiRegistry.Invalidate(node.Name)
}
},
})
lookupNode := func(hostName string) *api.Node {
n, _, _ := nodeStore.GetByKey(hostName) // ignore error and return nil then
if n == nil {
return nil
}
return n.(*api.Node)
}
execInfoCache, err := executorinfo.NewCache(defaultExecutorInfoCacheSize)
if err != nil {
log.Fatalf("cannot create executorinfo cache: %v", err)
}
eiRegistry, err = executorinfo.NewRegistry(lookupNode, eiPrototype, execInfoCache)
if err != nil {
log.Fatalf("cannot create executorinfo registry: %v", err)
}
pr := podtask.NewDefaultProcurement(eiPrototype, eiRegistry)
fcfs := podschedulers.NewFCFSPodScheduler(pr, lookupNode)
framework := framework.New(framework.Config{
SchedulerConfig: *sc,
Client: client,
FailoverTimeout: s.failoverTimeout,
ReconcileInterval: s.reconcileInterval,
ReconcileCooldown: s.reconcileCooldown,
LookupNode: lookupNode,
StoreFrameworkId: func(id string) {
// TODO(jdef): port FrameworkId store to generic Kubernetes config store as soon as available
_, err := etcdClient.Set(meta.FrameworkIDKey, id, uint64(s.failoverTimeout))
if err != nil {
log.Errorf("failed to renew frameworkId TTL: %v", err)
}
},
ExecutorId: eiPrototype.GetExecutorId(),
})
masterUri := s.mesosMaster
info, cred, err := s.buildFrameworkInfo()
if err != nil {
log.Fatalf("Misconfigured mesos framework: %v", err)
}
schedulerProcess := ha.New(framework)
dconfig := &bindings.DriverConfig{
Scheduler: schedulerProcess,
Framework: info,
Master: masterUri,
Credential: cred,
BindingAddress: s.address,
BindingPort: uint16(s.driverPort),
HostnameOverride: s.hostnameOverride,
WithAuthContext: func(ctx context.Context) context.Context {
ctx = auth.WithLoginProvider(ctx, s.mesosAuthProvider)
ctx = sasl.WithBindingAddress(ctx, s.address)
return ctx
},
}
// create event recorder sending events to the "" namespace of the apiserver
broadcaster := record.NewBroadcaster()
recorder := broadcaster.NewRecorder(api.EventSource{Component: "scheduler"})
broadcaster.StartRecordingToSink(client.Events(""))
// create scheduler core with all components arranged around it
lw := cache.NewListWatchFromClient(client, "pods", api.NamespaceAll, fields.Everything())
sched := components.New(
sc,
framework,
fcfs,
client,
recorder,
schedulerProcess.Terminal(),
s.mux,
lw,
eiPrototype,
s.mesosRoles,
s.defaultContainerCPULimit,
s.defaultContainerMemLimit,
)
runtime.On(framework.Registration(), func() { sched.Run(schedulerProcess.Terminal()) })
runtime.On(framework.Registration(), s.newServiceWriter(schedulerProcess.Terminal()))
runtime.On(framework.Registration(), func() { nodeCtl.Run(schedulerProcess.Terminal()) })
driverFactory := ha.DriverFactory(func() (drv bindings.SchedulerDriver, err error) {
log.V(1).Infoln("performing deferred initialization")
if err = framework.Init(sched, schedulerProcess.Master(), s.mux); err != nil {
return nil, fmt.Errorf("failed to initialize pod scheduler: %v", err)
}
log.V(1).Infoln("deferred init complete")
// defer obtaining framework ID to prevent multiple schedulers
// from overwriting each other's framework IDs
dconfig.Framework.Id, err = s.fetchFrameworkID(etcdClient)
if err != nil {
return nil, fmt.Errorf("failed to fetch framework ID from etcd: %v", err)
}
log.V(1).Infoln("constructing mesos scheduler driver")
drv, err = bindings.NewMesosSchedulerDriver(*dconfig)
if err != nil {
return nil, fmt.Errorf("failed to construct scheduler driver: %v", err)
}
log.V(1).Infoln("constructed mesos scheduler driver:", drv)
s.setDriver(drv)
return drv, nil
})
return schedulerProcess, driverFactory, etcdClient, eiPrototype.GetExecutorId()
}