refined README and removed unwanted scheduling policies.
This commit is contained in:
Pradyumna Kaushik
parent
dc279801b7
commit
1c4b6f0f01
16 changed files with 8 additions and 3896 deletions
207
schedulers/first-fit.go
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207
schedulers/first-fit.go
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@ -0,0 +1,207 @@
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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/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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"os"
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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 *FirstFit) takeOffer(offer *mesos.Offer, task def.Task) bool {
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cpus, mem, watts := offerUtils.OfferAgg(offer)
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//TODO: Insert watts calculation here instead of taking them as a parameter
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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 cpus >= task.CPU && mem >= task.RAM && (!s.wattsAsAResource || 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 FirstFit struct {
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base // Type embedded to inherit common functions
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}
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// New electron scheduler
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func NewFirstFit(tasks []def.Task, wattsAsAResource bool, schedTracePrefix string, classMapWatts bool) *FirstFit {
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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 := &FirstFit{
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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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}
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return s
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}
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func (s *FirstFit) 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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// Add task to list of tasks running on 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.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 *FirstFit) ResourceOffers(driver sched.SchedulerDriver, offers []*mesos.Offer) {
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log.Printf("Received %d resource offers", len(offers))
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for _, offer := range offers {
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offerUtils.UpdateEnvironment(offer)
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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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tasks := []*mesos.TaskInfo{}
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// First fit strategy
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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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// Decision to take the offer or not
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if s.takeOffer(offer, task) {
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log.Println("Co-Located with: ")
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coLocated(s.running[offer.GetSlaveId().GoString()])
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taskToSchedule := s.newTask(offer, task)
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tasks = append(tasks, taskToSchedule)
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log.Printf("Starting %s on [%s]\n", task.Name, offer.GetHostname())
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driver.LaunchTasks([]*mesos.OfferID{offer.Id}, tasks, mesosUtils.DefaultFilter)
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offerTaken = true
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fmt.Println("Inst: ", *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 task have been scheduled, remove it
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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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close(s.Shutdown)
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}
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}
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break // Offer taken, move on
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}
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}
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// If there was no match for the task
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if !offerTaken {
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fmt.Println("There is not enough resources to launch a task:")
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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 *FirstFit) 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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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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