382 lines
12 KiB
Go
382 lines
12 KiB
Go
package schedulers
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import (
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"bitbucket.org/sunybingcloud/electron/constants"
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"bitbucket.org/sunybingcloud/electron/def"
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powCap "bitbucket.org/sunybingcloud/electron/powerCapping"
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"bitbucket.org/sunybingcloud/electron/rapl"
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"bitbucket.org/sunybingcloud/electron/utilities/mesosUtils"
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"bitbucket.org/sunybingcloud/electron/utilities/offerUtils"
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"fmt"
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"github.com/golang/protobuf/proto"
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mesos "github.com/mesos/mesos-go/mesosproto"
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"github.com/mesos/mesos-go/mesosutil"
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sched "github.com/mesos/mesos-go/scheduler"
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"log"
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"math"
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"os"
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"sync"
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"time"
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)
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// Decides if to take an offer or not
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func (s *FirstFitProacCC) takeOffer(offer *mesos.Offer, task def.Task) bool {
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offer_cpu, offer_mem, offer_watts := offerUtils.OfferAgg(offer)
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wattsConsideration, err := def.WattsToConsider(task, s.classMapWatts, offer)
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if err != nil {
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// Error in determining wattsConsideration
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log.Fatal(err)
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}
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if offer_cpu >= task.CPU && offer_mem >= task.RAM && (!s.wattsAsAResource || (offer_watts >= wattsConsideration)) {
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return true
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}
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return false
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}
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// electronScheduler implements the Scheduler interface.
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type FirstFitProacCC struct {
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base // Type embedded to inherit common functions
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taskMonitor map[string][]def.Task // store tasks that are currently running.
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availablePower map[string]float64 // available power for each node in the cluster.
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totalPower map[string]float64 // total power for each node in the cluster.
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capper *powCap.ClusterwideCapper
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ticker *time.Ticker
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recapTicker *time.Ticker
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isCapping bool // indicate whether we are currently performing cluster wide capping.
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isRecapping bool // indicate whether we are currently performing cluster wide re-capping.
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}
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// New electron scheduler.
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func NewFirstFitProacCC(tasks []def.Task, wattsAsAResource bool, schedTracePrefix string,
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classMapWatts bool) *FirstFitProacCC {
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logFile, err := os.Create("./" + schedTracePrefix + "_schedTrace.log")
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if err != nil {
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log.Fatal(err)
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}
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s := &FirstFitProacCC{
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base: base{
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tasks: tasks,
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wattsAsAResource: wattsAsAResource,
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classMapWatts: classMapWatts,
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Shutdown: make(chan struct{}),
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Done: make(chan struct{}),
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PCPLog: make(chan struct{}),
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running: make(map[string]map[string]bool),
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RecordPCP: false,
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schedTrace: log.New(logFile, "", log.LstdFlags),
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},
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taskMonitor: make(map[string][]def.Task),
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availablePower: make(map[string]float64),
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totalPower: make(map[string]float64),
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capper: powCap.GetClusterwideCapperInstance(),
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ticker: time.NewTicker(10 * time.Second),
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recapTicker: time.NewTicker(20 * time.Second),
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isCapping: false,
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isRecapping: false,
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}
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return s
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}
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// mutex
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var fcfsMutex sync.Mutex
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func (s *FirstFitProacCC) newTask(offer *mesos.Offer, task def.Task) *mesos.TaskInfo {
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taskName := fmt.Sprintf("%s-%d", task.Name, *task.Instances)
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s.tasksCreated++
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if !s.RecordPCP {
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// Turn on logging.
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s.RecordPCP = true
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time.Sleep(1 * time.Second) // Make sure we're recording by the time the first task starts
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}
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// If this is our first time running into this Agent
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if _, ok := s.running[offer.GetSlaveId().GoString()]; !ok {
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s.running[offer.GetSlaveId().GoString()] = make(map[string]bool)
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}
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// Setting the task ID to the task. This is done so that we can consider each task to be different,
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// even though they have the same parameters.
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task.SetTaskID(*proto.String("electron-" + taskName))
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// Add task to the list of tasks running on the node.
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s.running[offer.GetSlaveId().GoString()][taskName] = true
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if len(s.taskMonitor[*offer.Hostname]) == 0 {
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s.taskMonitor[*offer.Hostname] = []def.Task{task}
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} else {
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s.taskMonitor[*offer.Hostname] = append(s.taskMonitor[*offer.Hostname], task)
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}
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resources := []*mesos.Resource{
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mesosutil.NewScalarResource("cpus", task.CPU),
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mesosutil.NewScalarResource("mem", task.RAM),
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}
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if s.wattsAsAResource {
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if wattsToConsider, err := def.WattsToConsider(task, s.classMapWatts, offer); err == nil {
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log.Printf("Watts considered for host[%s] and task[%s] = %f", *offer.Hostname, task.Name, wattsToConsider)
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resources = append(resources, mesosutil.NewScalarResource("watts", wattsToConsider))
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} else {
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// Error in determining wattsConsideration
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log.Fatal(err)
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}
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}
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return &mesos.TaskInfo{
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Name: proto.String(taskName),
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TaskId: &mesos.TaskID{
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Value: proto.String("electron-" + taskName),
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},
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SlaveId: offer.SlaveId,
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Resources: resources,
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Command: &mesos.CommandInfo{
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Value: proto.String(task.CMD),
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},
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Container: &mesos.ContainerInfo{
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Type: mesos.ContainerInfo_DOCKER.Enum(),
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Docker: &mesos.ContainerInfo_DockerInfo{
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Image: proto.String(task.Image),
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Network: mesos.ContainerInfo_DockerInfo_BRIDGE.Enum(), // Run everything isolated
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},
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},
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}
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}
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func (s *FirstFitProacCC) Disconnected(sched.SchedulerDriver) {
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// Need to stop the capping process.
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s.ticker.Stop()
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s.recapTicker.Stop()
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fcfsMutex.Lock()
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s.isCapping = false
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fcfsMutex.Unlock()
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log.Println("Framework disconnected with master")
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}
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// go routine to cap the entire cluster in regular intervals of time.
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var fcfsCurrentCapValue = 0.0 // initial value to indicate that we haven't capped the cluster yet.
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func (s *FirstFitProacCC) startCapping() {
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go func() {
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for {
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select {
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case <-s.ticker.C:
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// Need to cap the cluster to the fcfsCurrentCapValue.
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fcfsMutex.Lock()
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if fcfsCurrentCapValue > 0.0 {
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for host, _ := range constants.Hosts {
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// Rounding curreCapValue to the nearest int.
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if err := rapl.Cap(host, "rapl", float64(int(math.Floor(fcfsCurrentCapValue+0.5)))); err != nil {
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log.Println(err)
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}
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}
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log.Printf("Capped the cluster to %d", int(math.Floor(fcfsCurrentCapValue+0.5)))
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}
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fcfsMutex.Unlock()
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}
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}
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}()
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}
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// go routine to cap the entire cluster in regular intervals of time.
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var fcfsRecapValue = 0.0 // The cluster wide cap value when recapping.
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func (s *FirstFitProacCC) startRecapping() {
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go func() {
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for {
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select {
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case <-s.recapTicker.C:
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fcfsMutex.Lock()
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// If stopped performing cluster wide capping then we need to explicitly cap the entire cluster.
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if s.isRecapping && fcfsRecapValue > 0.0 {
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for host, _ := range constants.Hosts {
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// Rounding curreCapValue to the nearest int.
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if err := rapl.Cap(host, "rapl", float64(int(math.Floor(fcfsRecapValue+0.5)))); err != nil {
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log.Println(err)
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}
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}
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log.Printf("Recapped the cluster to %d", int(math.Floor(fcfsRecapValue+0.5)))
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}
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// setting recapping to false
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s.isRecapping = false
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fcfsMutex.Unlock()
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}
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}
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}()
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}
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// Stop cluster wide capping
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func (s *FirstFitProacCC) stopCapping() {
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if s.isCapping {
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log.Println("Stopping the cluster wide capping.")
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s.ticker.Stop()
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fcfsMutex.Lock()
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s.isCapping = false
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s.isRecapping = true
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fcfsMutex.Unlock()
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}
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}
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// Stop cluster wide Recapping
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func (s *FirstFitProacCC) stopRecapping() {
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// If not capping, then definitely recapping.
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if !s.isCapping && s.isRecapping {
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log.Println("Stopping the cluster wide re-capping.")
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s.recapTicker.Stop()
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fcfsMutex.Lock()
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s.isRecapping = false
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fcfsMutex.Unlock()
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}
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}
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func (s *FirstFitProacCC) ResourceOffers(driver sched.SchedulerDriver, offers []*mesos.Offer) {
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log.Printf("Received %d resource offers", len(offers))
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// retrieving the available power for all the hosts in the offers.
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for _, offer := range offers {
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offerUtils.UpdateEnvironment(offer)
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_, _, offer_watts := offerUtils.OfferAgg(offer)
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s.availablePower[*offer.Hostname] = offer_watts
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// setting total power if the first time.
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if _, ok := s.totalPower[*offer.Hostname]; !ok {
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s.totalPower[*offer.Hostname] = offer_watts
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}
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}
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for host, tpower := range s.totalPower {
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log.Printf("TotalPower[%s] = %f", host, tpower)
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}
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for _, offer := range offers {
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select {
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case <-s.Shutdown:
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log.Println("Done scheduling tasks: declining offer on [", offer.GetHostname(), "]")
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driver.DeclineOffer(offer.Id, mesosUtils.LongFilter)
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log.Println("Number of tasks still running: ", s.tasksRunning)
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continue
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default:
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}
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/*
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Clusterwide Capping strategy
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For each task in s.tasks,
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1. Need to check whether the offer can be taken or not (based on CPU and RAM requirements).
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2. If the tasks fits the offer, then I need to detemrine the cluster wide cap.
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3. fcfsCurrentCapValue is updated with the determined cluster wide cap.
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Cluster wide capping is currently performed at regular intervals of time.
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*/
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offerTaken := false
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for i := 0; i < len(s.tasks); i++ {
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task := s.tasks[i]
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// Don't take offer if it doesn't match our task's host requirement
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if offerUtils.HostMismatch(*offer.Hostname, task.Host) {
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continue
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}
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// Does the task fit.
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if s.takeOffer(offer, task) {
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// Capping the cluster if haven't yet started,
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if !s.isCapping {
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fcfsMutex.Lock()
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s.isCapping = true
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fcfsMutex.Unlock()
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s.startCapping()
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}
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offerTaken = true
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tempCap, err := s.capper.FCFSDeterminedCap(s.totalPower, &task)
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if err == nil {
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fcfsMutex.Lock()
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fcfsCurrentCapValue = tempCap
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fcfsMutex.Unlock()
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} else {
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log.Println("Failed to determine new cluster wide cap: ")
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log.Println(err)
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}
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log.Printf("Starting on [%s]\n", offer.GetHostname())
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taskToSchedule := s.newTask(offer, task)
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toSchedule := []*mesos.TaskInfo{taskToSchedule}
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driver.LaunchTasks([]*mesos.OfferID{offer.Id}, toSchedule, mesosUtils.DefaultFilter)
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log.Printf("Inst: %d", *task.Instances)
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s.schedTrace.Print(offer.GetHostname() + ":" + taskToSchedule.GetTaskId().GetValue())
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*task.Instances--
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if *task.Instances <= 0 {
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// All instances of the task have been scheduled. Need to remove it from the list of tasks to schedule.
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s.tasks[i] = s.tasks[len(s.tasks)-1]
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s.tasks = s.tasks[:len(s.tasks)-1]
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if len(s.tasks) <= 0 {
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log.Println("Done scheduling all tasks")
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// Need to stop the cluster wide capping as there aren't any more tasks to schedule.
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s.stopCapping()
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s.startRecapping() // Load changes after every task finishes and hence we need to change the capping of the cluster.
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close(s.Shutdown)
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}
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}
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break // Offer taken, move on.
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} else {
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// Task doesn't fit the offer. Move onto the next offer.
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}
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}
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// If no task fit the offer, then declining the offer.
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if !offerTaken {
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log.Printf("There is not enough resources to launch a task on Host: %s\n", offer.GetHostname())
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cpus, mem, watts := offerUtils.OfferAgg(offer)
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log.Printf("<CPU: %f, RAM: %f, Watts: %f>\n", cpus, mem, watts)
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driver.DeclineOffer(offer.Id, mesosUtils.DefaultFilter)
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}
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}
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}
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func (s *FirstFitProacCC) StatusUpdate(driver sched.SchedulerDriver, status *mesos.TaskStatus) {
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log.Printf("Received task status [%s] for task [%s]\n", NameFor(status.State), *status.TaskId.Value)
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if *status.State == mesos.TaskState_TASK_RUNNING {
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fcfsMutex.Lock()
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s.tasksRunning++
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fcfsMutex.Unlock()
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} else if IsTerminal(status.State) {
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delete(s.running[status.GetSlaveId().GoString()], *status.TaskId.Value)
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// Need to remove the task from the window of tasks.
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s.capper.TaskFinished(*status.TaskId.Value)
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// Determining the new cluster wide cap.
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//tempCap, err := s.capper.NaiveRecap(s.totalPower, s.taskMonitor, *status.TaskId.Value)
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tempCap, err := s.capper.CleverRecap(s.totalPower, s.taskMonitor, *status.TaskId.Value)
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if err == nil {
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// if new determined cap value is different from the current recap value then we need to recap.
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if int(math.Floor(tempCap+0.5)) != int(math.Floor(fcfsRecapValue+0.5)) {
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fcfsRecapValue = tempCap
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fcfsMutex.Lock()
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s.isRecapping = true
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fcfsMutex.Unlock()
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log.Printf("Determined re-cap value: %f\n", fcfsRecapValue)
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} else {
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fcfsMutex.Lock()
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s.isRecapping = false
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fcfsMutex.Unlock()
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}
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} else {
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// Not updating fcfsCurrentCapValue
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log.Println(err)
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}
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fcfsMutex.Lock()
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s.tasksRunning--
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fcfsMutex.Unlock()
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if s.tasksRunning == 0 {
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select {
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case <-s.Shutdown:
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// Need to stop the recapping process.
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s.stopRecapping()
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close(s.Done)
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default:
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}
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}
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}
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log.Printf("DONE: Task status [%s] for task [%s]", NameFor(status.State), *status.TaskId.Value)
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}
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