Example #1
0
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()
}
Example #2
0
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
}
Example #3
0
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
}
Example #4
0
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()
}