Proactive cluster wide first come first server scheduler. This schedules tasks based on the fcfs cluster wide capping policy defined in proactiveclusterwidecappers.go
This commit is contained in:
Pradyumna Kaushik
Renan DelValle
parent
d8710385be
commit
8d032f9547
1 changed files with 269 additions and 0 deletions
269
schedulers/proactiveclusterwidecappingfcfs.go
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269
schedulers/proactiveclusterwidecappingfcfs.go
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package schedulers
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import (
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"bitbucket.org/sunybingcloud/electron/def"
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"bitbucket.org/sunybingcloud/electron/constants"
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"bitbucket.org/sunybingcloud/electron/rapl"
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"errors"
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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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"sort"
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"strings"
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"sync"
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"time"
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)
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// electronScheduler implements the Scheduler interface.
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type ProactiveClusterwideCapFCFS struct {
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tasksCreated int
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tasksRunning int
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tasks []def.Task
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metrics map[string]def.Metric
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running map[string]map[string]bool
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ignoreWatts bool
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capper *clusterwideCapper
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ticker *time.Ticker
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isCapping bool
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// First set of PCP values are garbage values, signal to logger to start recording when we're
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// about to schedule the new task.
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RecordPCP bool
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// This channel is closed when the program receives an interrupt,
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// signalling that the program should shut down.
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Shutdown chan struct{}
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// This channel is closed after shutdown is closed, and only when all
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// outstanding tasks have been cleaned up.
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Done chan struct{}
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// Controls when to shutdown pcp logging.
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PCPLog chan struct{}
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}
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// New electron scheduler.
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func NewProactiveClusterwideCapFCFS(tasks []def.Task, ignoreWatts bool) *ProactiveClusterwideCapFCFS {
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s := &ProactiveClusterwideCapFCFS {
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tasks: tasks,
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ignoreWatts: ignoreWatts,
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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(mapp[string]map[string]bool),
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RecordPCP: false,
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capper: getClusterwideCapperInstance(),
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ticker: time.NewTicker(constants.Clusterwide_cap_interval * time.Second),
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isCapping: false
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}
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return s
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}
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func (s *ProactiveClusterwideCapFCFS) 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(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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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.ignoreWatts {
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resources = append(resources, mesosutil.NewScalarResource("watts", task.Watts))
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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 *ProactiveClusterwideCapFCFS) Registered(
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_ sched.SchedulerDriver,
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framewordID *mesos.FrameworkID,
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masterInfo *mesos.MasterInfo) {
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log.Printf("Framework %s registered with master %s", frameworkID, masterInfo)
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}
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func (s *ProactiveClusterwideCapFCFS) Reregistered(_ sched.SchedulerDriver, masterInfo *mesos.MasterInfo) {
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log.Printf("Framework re-registered with master %s", masterInfo)
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}
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func (s *ProactiveClusterwideCapFCFS) Disconnected(sched.SchedulerDriver) {
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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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func (s *ProactiveClusterwideCapFCFS) startCapping(currentCapValue float64, mutex sync.Mutex) {
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go func() {
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for tick := range s.ticker.C {
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// Need to cap the cluster to the currentCapValue.
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if currentCapValue > 0.0 {
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mutex.Lock()
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for _, host := range constants.Hosts {
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if err := rapl.Cap(host, int(math.Floor(currentCapValue + 0.5))); err != nil {
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fmt.Println(err)
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} else {
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fmt.Println("Successfully capped %s to %d\\%", host, currentCapValue)
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}
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}
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mutex.Unlock()
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}
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}
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}
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}
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// TODO: Need to reduce the time complexity: looping over offers twice (Possible to do it just once?).
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func (s *ProactiveClusterwideCapFCFS) 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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available_power := make(map[string]float64)
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for _, offer := range offers {
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_, _, offer_watts := OfferAgg(offer)
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available_power[offer.Hostname] = offer_watts
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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 offerf on [", offer.GetHostname(), "]")
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driver.DeclineOffer(offer.Id, longFilter)
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log.Println("Number og 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. I need to check whether the mesos offer can be taken or not (based on CPU and RAM).
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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. First need to cap the cluster to the determine cap value and then launch the task on the host corresponding to the offer.
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Capping the cluster for every task would create a lot of overhead. Hence, clusterwide capping is performed at regular intervals.
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TODO: We can choose to cap the cluster only if the clusterwide cap varies more than the current clusterwide cap.
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Although this sounds like a better approach, it only works when the resource requirements of neighbouring tasks are similar.
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*/
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offer_cpu, offer_ram, _ := OfferAgg(offer)
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taken := false
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currentCapValue := 0.0 // initial value to indicate that we haven't capped the cluster yet.
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var mutex sync.Mutex
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for _, task := range s.tasks {
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// Don't take offer if it doesn't match our task's host requirement.
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if !strings.HasPrefix(*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.ignoreWatts || offer_cpu >= task.CPU ||| offer_ram >= task.RAM) {
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taken = true
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mutex.Lock()
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tempCap, err = s.capper.fcfsDetermineCap(available_power, task)
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if err == nil {
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currentCapValue = tempCap
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} else {
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fmt.Println("Failed to determine cluster wide cap: " + err.String())
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}
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mutex.Unlock()
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fmt.Printf("Starting on [%s]\n", offer.GetHostname())
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driver.LaunchTasks([]*mesos.OfferID{offer.Id}, [s.newTask(offer, task)], defaultFilter)
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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 !taken {
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fmt.Println("There is not enough resources to launch a task:")
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cpus, mem, watts := 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, defaultFilter)
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}
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}
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}
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func (s *ProactiveClusterwideCapFCFS) StatusUpdate(driver sched.SchedulerDriver, status *mesos.TaskStatus) {
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log.Printf("Received task status [%s] for task [%s]", NameFor(status.State), *status.TaskId.Value)
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if *status.State == mesos.TaskState_TASK_RUNNING {
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s.tasksRunning++
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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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s.tasksRunning--
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if s.tasksRunning == 0 {
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select {
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case <-s.Shutdown:
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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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func (s *ProactiveClusterwideCapFCFS) FrameworkMessage(driver sched.SchedulerDriver,
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executorID *mesos.ExecutorID,
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slaveID *mesos.SlaveID,
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message string) {
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log.Println("Getting a framework message: ", message)
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log.Printf("Received a framework message from some unknown source: %s", *executorID.Value)
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}
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func (s *ProactiveClusterwideCapFCFS) OfferRescinded(_ sched.SchedulerDriver, offerID *mesos.OfferID) {
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log.Printf("Offer %s rescinded", offerID)
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}
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func (s *ProactiveClusterwideCapFCFS) SlaveLost(_ sched.SchedulerDriver, slaveID *mesos.SlaveID) {
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log.Printf("Slave %s lost", slaveID)
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}
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func (s *ProactiveClusterwideCapFCFS) ExecutorLost(_ sched.SchedulerDriver, executorID *mesos.ExecutorID, slaveID *mesos.SlaveID, status int) {
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log.Printf("Executor %s on slave %s was lost", executorID, slaveID)
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}
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func (s *ProactiveClusterwideCapFCFS) Error(_ sched.SchedulerDriver, err string) {
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log.Printf("Receiving an error: %s", err)
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}
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