From d9357f59e76403a22aa9331890b62ea63bdd95e0 Mon Sep 17 00:00:00 2001 From: Pradyumna Kaushik Date: Thu, 15 Dec 2016 14:32:34 -0500 Subject: [PATCH] New scheduler. BinPacking with capping each node to different values (piston capping). --- schedulers/pistoncapper.go | 409 +++++++++++++++++++++++++++++++++++++ 1 file changed, 409 insertions(+) create mode 100644 schedulers/pistoncapper.go diff --git a/schedulers/pistoncapper.go b/schedulers/pistoncapper.go new file mode 100644 index 0000000..60f2a56 --- /dev/null +++ b/schedulers/pistoncapper.go @@ -0,0 +1,409 @@ +package schedulers + +import ( + "bitbucket.org/sunybingcloud/electron/constants" + "bitbucket.org/sunybingcloud/electron/def" + "bitbucket.org/sunybingcloud/electron/rapl" + "fmt" + "errors" + "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" + "math" + "sync" + "strings" + "time" +) + +/* + Piston Capper implements the Scheduler interface + + This is basically extending the BinPacking algorithm to also cap each node at a different values, + corresponding to the load on that node. +*/ +type PistonCapper struct { + tasksCreated int + tasksRunning int + tasks []def.Task + metrics map[string]def.Metric + running map[string]map[string]bool + taskMonitor map[string][]def.Task + clusterLoad map[string]float64 + totalPower map[string]float64 + ignoreWatts bool + ticker *time.Ticker + isCapping bool + + // First set of PCP values are garbage values, signal to logger to start recording when we're + // about to schedule the new task. + RecordPCP bool + + // This channel is closed when the program receives an interrupt, + // signalling that the program should shut down. + Shutdown chan struct{} + + // This channel is closed after shutdown is closed, and only when all + // outstanding tasks have been cleaned up. + Done chan struct{} + + // Controls when to shutdown pcp logging. + PCPLog chan struct{} +} + +// New electron scheduler. +func NewPistonCapper(tasks []def.Task, ignoreWatts bool) *PistonCapper { + s := &PistonCapper{ + tasks: tasks, + ignoreWatts: ignoreWatts, + Shutdown: make(chan struct{}), + Done: make(chan struct{}), + PCPLog: make(chan struct{}), + running: make(map[string]map[string]bool), + taskMonitor: make(map[string][]def.Task), + clusterLoad: make(map[string]float64), + totalPower: make(map[string]float64), + RecordPCP: false, + ticker: time.NewTicker(10 * time.Second), + isCapping: false, + } + return s +} + +// mutex +var mutex sync.Mutex + +func (s *PistonCapper) newTask(offer *mesos.Offer, task def.Task) *mesos.TaskInfo { + taskName := fmt.Sprintf("%s-%d", task.Name, *task.Instances) + s.tasksCreated++ + + 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) + } + + // Setting the task ID to the task. This is done so that we can consider each task to be different, + // even though they have the same parameters. + task.SetTaskID(*proto.String("electron-" + taskName)) + // Add task to list of tasks running on node + s.running[offer.GetSlaveId().GoString()][taskName] = true + // Adding the task to the taskMonitor + if len(s.taskMonitor[*offer.Hostname]) == 0 { + s.taskMonitor[*offer.Hostname] = []def.Task{task} + } else { + s.taskMonitor[*offer.Hostname] = append(s.taskMonitor[*offer.Hostname], task) + } + + resources := []*mesos.Resource{ + mesosutil.NewScalarResource("cpus", task.CPU), + mesosutil.NewScalarResource("mem", task.RAM), + } + + if !s.ignoreWatts { + resources = append(resources, mesosutil.NewScalarResource("watts", task.Watts)) + } + + return &mesos.TaskInfo{ + Name: proto.String(taskName), + TaskId: &mesos.TaskID{ + Value: proto.String("electron-" + 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 + }, + }, + } +} + + + +func (s *PistonCapper) Registered( + _ sched.SchedulerDriver, + frameworkID *mesos.FrameworkID, + masterInfo *mesos.MasterInfo) { + log.Printf("Framework %s registered with master %s", frameworkID, masterInfo) +} + +func (s *PistonCapper) Reregistered(_ sched.SchedulerDriver, masterInfo *mesos.MasterInfo) { + log.Printf("Framework re-registered with master %s", masterInfo) +} + +func (s *PistonCapper) Disconnected(sched.SchedulerDriver) { + log.Println("Framework disconnected with master") +} + +// go routine to cap the each node in the cluster at regular intervals of time. +var capValues = make(map[string]float64) +// Storing the previous cap value for each host so as to not repeatedly cap the nodes to the same value. (reduces overhead) +var previousRoundedCapValues = make(map[string]int) +func (s *PistonCapper) startCapping() { + go func() { + for { + select { + case <-s.ticker.C: + // Need to cap each node + mutex.Lock() + for host, capValue := range capValues { + roundedCapValue := int(math.Floor(capValue + 0.5)) + // has the cap value changed + if prevRoundedCap, ok := previousRoundedCapValues[host]; ok { + if prevRoundedCap != roundedCapValue { + if err := rapl.Cap(host, "rapl", roundedCapValue); err != nil { + log.Println(err) + } + log.Printf("Capped [%s] at %d", host, int(math.Floor(capValue + 0.5))) + previousRoundedCapValues[host] = roundedCapValue + } + } else { + if err := rapl.Cap(host, "rapl", roundedCapValue); err != nil { + log.Println(err) + } + log.Printf("Capped [%s] at %d", host, int(math.Floor(capValue + 0.5))) + previousRoundedCapValues[host] = roundedCapValue + } + } + mutex.Unlock() + } + } + }() +} + +// Stop the capping +func (s *PistonCapper) stopCapping() { + if s.isCapping { + log.Println("Stopping the capping.") + s.ticker.Stop() + mutex.Lock() + s.isCapping = false + mutex.Unlock() + } +} + +// Check whether we are overloading the host (from watts perspective) +func wattsOverload(task def.Task, offerWatts float64, totalPower float64) bool { + if offerWatts >= (totalPower + (task.Watts * constants.CapMargin)) { + return false + } else { + return true + } +} + +func (s *PistonCapper) ResourceOffers(driver sched.SchedulerDriver, offers []*mesos.Offer) { + log.Printf("Received %d resource offers", len(offers)) + + // retrieving the total power for each host in the offers + for _, offer := range offers { + if _, ok := s.totalPower[*offer.Hostname]; !ok { + _, _, offer_watts := OfferAgg(offer) + s.totalPower[*offer.Hostname] = offer_watts + } + } + + // Displaying the totalPower + for host, tpower := range s.totalPower { + log.Printf("TotalPower[%s] = %f", host, tpower) + } + + /* + Piston capping strategy + + Perform bin-packing of tasks on nodes in the cluster, making sure that no task is given less hard-limit resources than requested. + For each set of tasks that are scheduled, compute the new cap values for each host in the cluster. + At regular intervals of time, cap each node in the cluster. + */ + log.Printf("Number of tasks yet to be scheduled: %d", len(s.tasks)) + + + for _, offer := range offers { + select { + case <-s.Shutdown: + log.Println("Done scheduling tasks: declining offer on [", offer.GetHostname(), "]") + driver.DeclineOffer(offer.Id, longFilter) + + log.Println("Number of tasks still running: ", s.tasksRunning) + continue + default: + } + + fitTasks := []*mesos.TaskInfo{} + offerCPU, offerRAM, offerWatts := OfferAgg(offer) + taken := false + totalWatts := 0.0 + totalCPU := 0.0 + totalRAM := 0.0 + // Store the partialLoad for host corresponding to this offer. + // Once we can't fit any more tasks, we update capValue for this host with partialLoad and then launch the fit tasks. + partialLoad := 0.0 + for i, task := range s.tasks { + // Check host if it exists + if task.Host != "" { + // Don't take offer if it doens't match our task's host requirement. + if !strings.HasPrefix(*offer.Hostname, task.Host) { + continue + } + } + + for *task.Instances > 0 { + // Does the task fit + if (s.ignoreWatts || !wattsOverload(task, offerWatts, totalWatts)) && + (offerCPU >= (totalCPU + task.CPU)) && + (offerRAM >= (totalRAM + task.RAM)) { + + // Start piston capping if haven't started yet + if !s.isCapping { + s.isCapping = true + s.startCapping() + } + + taken = true + totalWatts += (task.Watts * constants.CapMargin) + totalCPU += task.CPU + totalRAM += task.RAM + log.Println("Co-Located with: ") + coLocated(s.running[offer.GetSlaveId().GoString()]) + fitTasks = append(fitTasks, s.newTask(offer, task)) + + log.Println("Inst: ", *task.Instances) + *task.Instances-- + // updating the cap value for offer.Hostname + partialLoad += ((task.Watts * constants.CapMargin) / s.totalPower[*offer.Hostname]) * 100 + + 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) + } + } + } else { + break // Continue on to next task + } + } + } + + if taken { + // Updating the cap value for offer.Hostname + mutex.Lock() + capValues[*offer.Hostname] += partialLoad + mutex.Unlock() + log.Printf("Starting on [%s]\n", offer.GetHostname()) + driver.LaunchTasks([]*mesos.OfferID{offer.Id}, fitTasks, defaultFilter) + } else { + // If there was no match for task + log.Println("There is not enough resources to launch task: ") + cpus, mem, watts := OfferAgg(offer) + + log.Printf("\n", cpus, mem, watts) + driver.DeclineOffer(offer.Id, defaultFilter) + } + } +} + +// Remove finished task from the taskMonitor +func (s *PistonCapper) deleteFromTaskMonitor(finishedTaskID string) (def.Task, string, error) { + hostOfFinishedTask := "" + indexOfFinishedTask := -1 + found := false + var finishedTask def.Task + + for host, tasks := range s.taskMonitor { + for i, task := range tasks { + if task.TaskID == finishedTaskID { + hostOfFinishedTask = host + indexOfFinishedTask = i + found = true + } + } + if found { + break + } + } + + if hostOfFinishedTask != "" && indexOfFinishedTask != -1 { + finishedTask = s.taskMonitor[hostOfFinishedTask][indexOfFinishedTask] + log.Printf("Removing task with TaskID [%s] from the list of running tasks\n", + s.taskMonitor[hostOfFinishedTask][indexOfFinishedTask].TaskID) + s.taskMonitor[hostOfFinishedTask] = append(s.taskMonitor[hostOfFinishedTask][:indexOfFinishedTask], + s.taskMonitor[hostOfFinishedTask][indexOfFinishedTask+1:]...) + } else { + return finishedTask, hostOfFinishedTask, errors.New("Finished Task not present in TaskMonitor") + } + return finishedTask, hostOfFinishedTask, nil +} + +func (s *PistonCapper) StatusUpdate(driver sched.SchedulerDriver, status *mesos.TaskStatus) { + log.Printf("Received task status [%s] for task [%s]\n", NameFor(status.State), *status.TaskId.Value) + + if *status.State == mesos.TaskState_TASK_RUNNING { + mutex.Lock() + s.tasksRunning++ + mutex.Unlock() + } else if IsTerminal(status.State) { + delete(s.running[status.GetSlaveId().GoString()], *status.TaskId.Value) + // Deleting the task from the taskMonitor + finishedTask, hostOfFinishedTask, err := s.deleteFromTaskMonitor(*status.TaskId.Value) + if err != nil { + log.Println(err) + } + + // Need to update the cap values for host of the finishedTask + mutex.Lock() + capValues[hostOfFinishedTask] -= ((finishedTask.Watts * constants.CapMargin) / s.totalPower[hostOfFinishedTask]) * 100 + // Checking to see if the cap value has become 0, in which case we uncap the host. + if int(math.Floor(capValues[hostOfFinishedTask] + 0.5)) == 0 { + capValues[hostOfFinishedTask] = 100 + } + s.tasksRunning-- + mutex.Unlock() + + if s.tasksRunning == 0 { + select { + case <-s.Shutdown: + s.stopCapping() + close(s.Done) + default: + } + } + } + log.Printf("DONE: Task status [%s] for task [%s]", NameFor(status.State), *status.TaskId.Value) +} + +func (s *PistonCapper) FrameworkMessage( + driver sched.SchedulerDriver, + executorID *mesos.ExecutorID, + slaveID *mesos.SlaveID, + message string) { + + log.Println("Getting a framework message: ", message) + log.Printf("Received a framework message from some unknown source: %s", *executorID.Value) +} + +func (s *PistonCapper) OfferRescinded(_ sched.SchedulerDriver, offerID *mesos.OfferID) { + log.Printf("Offer %s rescinded", offerID) +} +func (s *PistonCapper) SlaveLost(_ sched.SchedulerDriver, slaveID *mesos.SlaveID) { + log.Printf("Slave %s lost", slaveID) +} +func (s *PistonCapper) ExecutorLost(_ sched.SchedulerDriver, executorID *mesos.ExecutorID, slaveID *mesos.SlaveID, status int) { + log.Printf("Executor %s on slave %s was lost", executorID, slaveID) +} + +func (s *PistonCapper) Error(_ sched.SchedulerDriver, err string) { + log.Printf("Receiving an error: %s", err) +}