added max-min scheduling policy

schedulers/max-min.go

@@ -0,0 +1,269 @@
+package schedulers
+
+import (
+	"bitbucket.org/sunybingcloud/elektron/def"
+	"bitbucket.org/sunybingcloud/elektron/utilities/mesosUtils"
+	"bitbucket.org/sunybingcloud/elektron/utilities/offerUtils"
+	"fmt"
+	"github.com/golang/protobuf/proto"
+	mesos "github.com/mesos/mesos-go/mesosproto"
+	"github.com/mesos/mesos-go/mesosutil"
+	sched "github.com/mesos/mesos-go/scheduler"
+	"log"
+	"os"
+	"time"
+)
+
+// Decides if to take an offer or not
+func (s *MaxMin) takeOffer(offer *mesos.Offer, task def.Task,
+	totalCPU, totalRAM, totalWatts float64) bool {
+
+	cpus, mem, watts := offerUtils.OfferAgg(offer)
+
+	//TODO: Insert watts calculation here instead of taking them as a parameter
+
+	wattsConsideration, err := def.WattsToConsider(task, s.classMapWatts, offer)
+	if err != nil {
+		// Error in determining wattsConsideration
+		log.Fatal(err)
+	}
+	if (cpus >= (totalCPU + task.CPU)) && (mem >= (totalRAM + task.RAM)) &&
+		(!s.wattsAsAResource || (watts >= (totalWatts + wattsConsideration))) {
+		return true
+	}
+	return false
+}
+
+type MaxMin struct {
+	base //Type embedding to inherit common functions
+}
+
+// New elektron scheduler
+func NewMaxMin(tasks []def.Task, wattsAsAResource bool, schedTracePrefix string, classMapWatts bool) *MaxMin {
+	def.SortTasks(tasks, def.SortByWatts)
+
+	logFile, err := os.Create("./" + schedTracePrefix + "_schedTrace.log")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	s := &MaxMin{
+		base: base{
+			tasks:            tasks,
+			wattsAsAResource: wattsAsAResource,
+			classMapWatts:    classMapWatts,
+			Shutdown:         make(chan struct{}),
+			Done:             make(chan struct{}),
+			PCPLog:           make(chan struct{}),
+			running:          make(map[string]map[string]bool),
+			RecordPCP:        false,
+			schedTrace:       log.New(logFile, "", log.LstdFlags),
+		},
+	}
+	return s
+}
+
+func (s *MaxMin) newTask(offer *mesos.Offer, task def.Task) *mesos.TaskInfo {
+	taskName := fmt.Sprintf("%s-%d", task.Name, *task.Instances)
+	s.tasksCreated++
+
+	// Start recording only when we're creating the first task
+	if !s.RecordPCP {
+		// Turn on logging
+		s.RecordPCP = true
+		time.Sleep(1 * time.Second) // Make sure we're recording by the time the first task starts
+	}
+
+	// If this is our first time running into this Agent
+	if _, ok := s.running[offer.GetSlaveId().GoString()]; !ok {
+		s.running[offer.GetSlaveId().GoString()] = make(map[string]bool)
+	}
+
+	// Add task to list of tasks running on node
+	s.running[offer.GetSlaveId().GoString()][taskName] = true
+
+	resources := []*mesos.Resource{
+		mesosutil.NewScalarResource("cpus", task.CPU),
+		mesosutil.NewScalarResource("mem", task.RAM),
+	}
+
+	if s.wattsAsAResource {
+		if wattsToConsider, err := def.WattsToConsider(task, s.classMapWatts, offer); err == nil {
+			log.Printf("Watts considered for host[%s] and task[%s] = %f", *offer.Hostname, task.Name, wattsToConsider)
+			resources = append(resources, mesosutil.NewScalarResource("watts", wattsToConsider))
+		} else {
+			// Error in determining wattsConsideration
+			log.Fatal(err)
+		}
+	}
+
+	return &mesos.TaskInfo{
+		Name: proto.String(taskName),
+		TaskId: &mesos.TaskID{
+			Value: proto.String("elektron-" + taskName),
+		},
+		SlaveId:   offer.SlaveId,
+		Resources: resources,
+		Command: &mesos.CommandInfo{
+			Value: proto.String(task.CMD),
+		},
+		Container: &mesos.ContainerInfo{
+			Type: mesos.ContainerInfo_DOCKER.Enum(),
+			Docker: &mesos.ContainerInfo_DockerInfo{
+				Image:   proto.String(task.Image),
+				Network: mesos.ContainerInfo_DockerInfo_BRIDGE.Enum(), // Run everything isolated
+			},
+		},
+	}
+}
+
+// Determine if the remaining space inside of the offer is enough for this
+// the task we need to create. If it is, create a TaskInfo and return it.
+func (s *MaxMin) CheckFit(
+	i int,
+	task def.Task,
+	wattsConsideration float64,
+	offer *mesos.Offer,
+	totalCPU *float64,
+	totalRAM *float64,
+	totalWatts *float64) (bool, *mesos.TaskInfo) {
+
+	// Does the task fit
+	if s.takeOffer(offer, task, *totalCPU, *totalRAM, *totalWatts) {
+
+		*totalWatts += wattsConsideration
+		*totalCPU += task.CPU
+		*totalRAM += task.RAM
+		log.Println("Co-Located with: ")
+		coLocated(s.running[offer.GetSlaveId().GoString()])
+
+		taskToSchedule := s.newTask(offer, task)
+
+		fmt.Println("Inst: ", *task.Instances)
+		s.schedTrace.Print(offer.GetHostname() + ":" + taskToSchedule.GetTaskId().GetValue())
+		*task.Instances--
+
+		if *task.Instances <= 0 {
+			// All instances of task have been scheduled, remove it
+			s.tasks = append(s.tasks[:i], s.tasks[i+1:]...)
+
+			if len(s.tasks) <= 0 {
+				log.Println("Done scheduling all tasks")
+				close(s.Shutdown)
+			}
+		}
+
+		return true, taskToSchedule
+	}
+
+	return false, nil
+}
+
+func (s *MaxMin) ResourceOffers(driver sched.SchedulerDriver, offers []*mesos.Offer) {
+	log.Printf("Received %d resource offers", len(offers))
+
+	for _, offer := range offers {
+		offerUtils.UpdateEnvironment(offer)
+		select {
+		case <-s.Shutdown:
+			log.Println("Done scheduling tasks: declining offer on [", offer.GetHostname(), "]")
+			driver.DeclineOffer(offer.Id, mesosUtils.LongFilter)
+
+			log.Println("Number of tasks still running: ", s.tasksRunning)
+			continue
+		default:
+		}
+
+		tasks := []*mesos.TaskInfo{}
+
+		offerTaken := false
+		totalWatts := 0.0
+		totalCPU := 0.0
+		totalRAM := 0.0
+
+		// Assumes s.tasks is ordered in non-decreasing median max peak order
+
+		// Attempt to schedule a single instance of the heaviest workload available first
+		// Start from the back until one fits
+
+		direction := false // True = Min Max, False = Max Min
+		var index int
+		start := true // if false then index has changed and need to keep it that way
+		for i := 0; i < len(s.tasks); i++ {
+			// we need to pick a min task or a max task
+			// depending on the value of direction
+			if direction && start {
+				index = 0
+			} else if start {
+				index = len(s.tasks) - i - 1
+			}
+			task := s.tasks[index]
+
+			wattsConsideration, err := def.WattsToConsider(task, s.classMapWatts, offer)
+			if err != nil {
+				// Error in determining wattsConsideration
+				log.Fatal(err)
+			}
+
+			// Don't take offer it is doesn't match our task's host requirement
+			if offerUtils.HostMismatch(*offer.Hostname, task.Host) {
+				continue
+			}
+
+			// TODO: Fix this so index doesn't need to be passed
+			taken, taskToSchedule := s.CheckFit(index, task, wattsConsideration, offer,
+				&totalCPU, &totalRAM, &totalWatts)
+
+			if taken {
+				offerTaken = true
+				tasks = append(tasks, taskToSchedule)
+				// Need to change direction and set start to true
+				// Setting start to true would ensure that index be set accurately again
+				direction = !direction
+				start = true
+				i--
+			} else {
+				// Need to move index depending on the value of direction
+				if direction {
+					index++
+					start = false
+				} else {
+					index--
+					start = false
+				}
+			}
+		}
+
+		if offerTaken {
+			log.Printf("Starting on [%s]\n", offer.GetHostname())
+			driver.LaunchTasks([]*mesos.OfferID{offer.Id}, tasks, mesosUtils.DefaultFilter)
+		} else {
+
+			// If there was no match for the task
+			fmt.Println("There is not enough resources to launch a task:")
+			cpus, mem, watts := offerUtils.OfferAgg(offer)
+
+			log.Printf("<CPU: %f, RAM: %f, Watts: %f>\n", cpus, mem, watts)
+			driver.DeclineOffer(offer.Id, mesosUtils.DefaultFilter)
+		}
+	}
+}
+
+func (s *MaxMin) StatusUpdate(driver sched.SchedulerDriver, status *mesos.TaskStatus) {
+	log.Printf("Received task status [%s] for task [%s]", NameFor(status.State), *status.TaskId.Value)
+
+	if *status.State == mesos.TaskState_TASK_RUNNING {
+		s.tasksRunning++
+	} else if IsTerminal(status.State) {
+		delete(s.running[status.GetSlaveId().GoString()], *status.TaskId.Value)
+		s.tasksRunning--
+		if s.tasksRunning == 0 {
+			select {
+			case <-s.Shutdown:
+				close(s.Done)
+			default:
+			}
+		}
+	}
+	log.Printf("DONE: Task status [%s] for task [%s]", NameFor(status.State), *status.TaskId.Value)
+}