442 lines
14 KiB
Go
442 lines
14 KiB
Go
// Copyright (C) 2018 spdf
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//
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// This file is part of Elektron.
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//
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// Elektron is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Elektron is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Elektron. If not, see <http://www.gnu.org/licenses/>.
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//
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package schedulers
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import (
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"bytes"
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"fmt"
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"log"
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"sync"
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"time"
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"github.com/golang/protobuf/proto"
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mesos "github.com/mesos/mesos-go/api/v0/mesosproto"
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"github.com/mesos/mesos-go/api/v0/mesosutil"
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sched "github.com/mesos/mesos-go/api/v0/scheduler"
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"gitlab.com/spdf/elektron/def"
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elekLogDef "gitlab.com/spdf/elektron/logging/def"
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"gitlab.com/spdf/elektron/utilities"
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"gitlab.com/spdf/elektron/utilities/schedUtils"
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)
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type BaseScheduler struct {
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ElectronScheduler
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SchedPolicyContext
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// Current scheduling policy used for resource offer consumption.
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curSchedPolicy SchedPolicyState
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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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wattsAsAResource bool
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classMapWatts bool
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TasksRunningMutex sync.Mutex
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HostNameToSlaveID map[string]string
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totalResourceAvailabilityRecorded 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 a 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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schedTrace *log.Logger
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// Send the type of the message to be logged
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logMsgType chan elekLogDef.LogMessageType
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// Send the message to be logged
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logMsg chan string
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mutex sync.Mutex
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// Whether switching of scheduling policies at runtime has been enabled
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schedPolSwitchEnabled bool
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// Name of the first scheduling policy to be deployed, if provided.
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// This scheduling policy would be deployed first regardless of the distribution of tasks in the TaskQueue.
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// Note: Scheduling policy switching needs to be enabled.
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nameOfFstSchedPolToDeploy string
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// Scheduling policy switching criteria.
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schedPolSwitchCriteria string
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// Size of window of tasks that can be scheduled in the next offer cycle.
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// The window size can be adjusted to make the most use of every resource offer.
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// By default, the schedWindowSize would correspond to the number of remaining tasks that haven't yet
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// been scheduled.
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schedWindowSize int
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// Number of tasks in the window
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numTasksInSchedWindow int
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// Whether the scheduling window needs to be fixed.
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toFixSchedWindow bool // If yes, then schedWindowSize is initialized and kept unchanged.
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// Strategy to resize the schedulingWindow.
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schedWindowResStrategy schedUtils.SchedWindowResizingStrategy
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// Indicate whether the any resource offers from mesos have been received.
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hasReceivedResourceOffers bool
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}
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func (s *BaseScheduler) init(opts ...SchedulerOptions) {
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for _, opt := range opts {
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// applying options
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if err := opt(s); err != nil {
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log.Fatal(err)
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}
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}
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s.TasksRunningMutex.Lock()
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s.Running = make(map[string]map[string]bool)
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s.TasksRunningMutex.Unlock()
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s.HostNameToSlaveID = make(map[string]string)
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s.mutex = sync.Mutex{}
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s.schedWindowResStrategy = schedUtils.SchedWindowResizingCritToStrategy["fillNextOfferCycle"]
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// Initially no resource offers would have been received.
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s.hasReceivedResourceOffers = false
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}
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func (s *BaseScheduler) SwitchSchedPol(newSchedPol SchedPolicyState) {
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s.curSchedPolicy = newSchedPol
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}
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func (s *BaseScheduler) 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 elecLogDef
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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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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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s.LogTaskWattsConsideration(task, *offer.Hostname, 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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s.LogElectronError(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 *BaseScheduler) OfferRescinded(_ sched.SchedulerDriver, offerID *mesos.OfferID) {
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s.LogOfferRescinded(offerID)
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}
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func (s *BaseScheduler) SlaveLost(_ sched.SchedulerDriver, slaveID *mesos.SlaveID) {
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s.LogSlaveLost(slaveID)
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}
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func (s *BaseScheduler) ExecutorLost(_ sched.SchedulerDriver, executorID *mesos.ExecutorID,
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slaveID *mesos.SlaveID, status int) {
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s.LogExecutorLost(executorID, slaveID)
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}
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func (s *BaseScheduler) Error(_ sched.SchedulerDriver, err string) {
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s.LogMesosError(err)
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}
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func (s *BaseScheduler) FrameworkMessage(
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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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s.LogFrameworkMessage(executorID, slaveID, message)
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}
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func (s *BaseScheduler) Registered(
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_ sched.SchedulerDriver,
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frameworkID *mesos.FrameworkID,
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masterInfo *mesos.MasterInfo) {
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s.LogFrameworkRegistered(frameworkID, masterInfo)
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}
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func (s *BaseScheduler) Reregistered(_ sched.SchedulerDriver, masterInfo *mesos.MasterInfo) {
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s.LogFrameworkReregistered(masterInfo)
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}
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func (s *BaseScheduler) Disconnected(sched.SchedulerDriver) {
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s.LogDisconnected()
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}
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func (s *BaseScheduler) ResourceOffers(driver sched.SchedulerDriver, offers []*mesos.Offer) {
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// Recording the total amount of resources available across the cluster.
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utilities.RecordTotalResourceAvailability(offers)
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for _, offer := range offers {
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if _, ok := s.HostNameToSlaveID[offer.GetHostname()]; !ok {
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s.HostNameToSlaveID[offer.GetHostname()] = *offer.SlaveId.Value
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}
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}
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// Switch just before consuming the resource offers.
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s.curSchedPolicy.SwitchIfNecessary(s)
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// s.Log(elecLogDef.GENERAL, fmt.Sprintf("SchedWindowSize[%d], #TasksInWindow[%d]",
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// s.schedWindowSize, s.numTasksInSchedWindow))
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s.curSchedPolicy.ConsumeOffers(s, driver, offers)
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s.hasReceivedResourceOffers = true
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}
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func (s *BaseScheduler) StatusUpdate(driver sched.SchedulerDriver, status *mesos.TaskStatus) {
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s.LogTaskStatusUpdate(status)
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if *status.State == mesos.TaskState_TASK_RUNNING {
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// If this is our first time running into this Agent
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s.TasksRunningMutex.Lock()
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if _, ok := s.Running[*status.SlaveId.Value]; !ok {
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s.Running[*status.SlaveId.Value] = 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[*status.SlaveId.Value][*status.TaskId.Value] = true
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s.tasksRunning++
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s.TasksRunningMutex.Unlock()
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} else if IsTerminal(status.State) {
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// Update resource availability.
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utilities.ResourceAvailabilityUpdate("ON_TASK_TERMINAL_STATE",
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*status.TaskId, *status.SlaveId)
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s.TasksRunningMutex.Lock()
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delete(s.Running[*status.SlaveId.Value], *status.TaskId.Value)
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s.tasksRunning--
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s.TasksRunningMutex.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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close(s.Done)
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default:
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}
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}
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}
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}
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func (s *BaseScheduler) Log(lmt elekLogDef.LogMessageType, msg string) {
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s.mutex.Lock()
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s.logMsgType <- lmt
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s.logMsg <- msg
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s.mutex.Unlock()
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}
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func (s *BaseScheduler) LogTaskStarting(ts *def.Task, offer *mesos.Offer) {
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lmt := elekLogDef.GENERAL
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msgColor := elekLogDef.LogMessageColors[lmt]
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var msg string
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if ts == nil {
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msg = msgColor.Sprintf("TASKS STARTING... host = [%s]", offer.GetHostname())
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} else {
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msg = msgColor.Sprintf("TASK STARTING... task = [%s], Instance = %d, host = [%s]",
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ts.Name, *ts.Instances, offer.GetHostname())
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}
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogTaskWattsConsideration(ts def.Task, host string, wattsToConsider float64) {
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lmt := elekLogDef.GENERAL
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("Watts considered for task[%s] and host[%s] = %f Watts",
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ts.Name, host, wattsToConsider)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogOffersReceived(offers []*mesos.Offer) {
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lmt := elekLogDef.GENERAL
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("Received %d resource offers", len(offers))
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogNoPendingTasksDeclineOffers(offer *mesos.Offer) {
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lmt := elekLogDef.WARNING
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("DECLINING OFFER for host[%s]... "+
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"No tasks left to schedule", offer.GetHostname())
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogNumberOfRunningTasks() {
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lmt := elekLogDef.GENERAL
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("Number of tasks still Running = %d", s.tasksRunning)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogCoLocatedTasks(slaveID string) {
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lmt := elekLogDef.GENERAL
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msgColor := elekLogDef.LogMessageColors[lmt]
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buffer := bytes.Buffer{}
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buffer.WriteString(fmt.Sprintln("Colocated with:"))
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s.TasksRunningMutex.Lock()
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for taskName := range s.Running[slaveID] {
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buffer.WriteString(fmt.Sprintln(taskName))
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}
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s.TasksRunningMutex.Unlock()
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msg := msgColor.Sprintf(buffer.String())
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogSchedTrace(taskToSchedule *mesos.TaskInfo, offer *mesos.Offer) {
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msg := fmt.Sprint(offer.GetHostname() + ":" + taskToSchedule.GetTaskId().GetValue())
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s.Log(elekLogDef.SCHED_TRACE, msg)
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}
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func (s *BaseScheduler) LogTerminateScheduler() {
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lmt := elekLogDef.GENERAL
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprint("Done scheduling all tasks!")
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogInsufficientResourcesDeclineOffer(offer *mesos.Offer,
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offerResources ...interface{}) {
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lmt := elekLogDef.WARNING
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msgColor := elekLogDef.LogMessageColors[lmt]
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buffer := bytes.Buffer{}
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buffer.WriteString(fmt.Sprintln("DECLINING OFFER... Offer has insufficient resources to launch a task"))
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buffer.WriteString(fmt.Sprintf("Offer Resources <CPU: %f, RAM: %f, Watts: %f>", offerResources...))
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msg := msgColor.Sprint(buffer.String())
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogOfferRescinded(offerID *mesos.OfferID) {
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lmt := elekLogDef.ERROR
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("OFFER RESCINDED: OfferID = %s", offerID)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogSlaveLost(slaveID *mesos.SlaveID) {
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lmt := elekLogDef.ERROR
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("SLAVE LOST: SlaveID = %s", slaveID)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogExecutorLost(executorID *mesos.ExecutorID, slaveID *mesos.SlaveID) {
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lmt := elekLogDef.ERROR
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("EXECUTOR LOST: ExecutorID = %s, SlaveID = %s", executorID, slaveID)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogFrameworkMessage(executorID *mesos.ExecutorID,
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slaveID *mesos.SlaveID, message string) {
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lmt := elekLogDef.GENERAL
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("Received Framework message from executor [%s]: %s", executorID, message)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogMesosError(err string) {
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lmt := elekLogDef.ERROR
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("MESOS ERROR: %s", err)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogElectronError(err error) {
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lmt := elekLogDef.ERROR
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("ELECTRON ERROR: %v", err)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogFrameworkRegistered(frameworkID *mesos.FrameworkID,
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masterInfo *mesos.MasterInfo) {
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lmt := elekLogDef.SUCCESS
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("FRAMEWORK REGISTERED! frameworkID = %s, master = %s",
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frameworkID, masterInfo)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogFrameworkReregistered(masterInfo *mesos.MasterInfo) {
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lmt := elekLogDef.GENERAL
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprintf("Framework re-registered with master %s", masterInfo)
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogDisconnected() {
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lmt := elekLogDef.WARNING
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := msgColor.Sprint("Framework disconnected with master")
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogTaskStatusUpdate(status *mesos.TaskStatus) {
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var lmt elekLogDef.LogMessageType
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switch *status.State {
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case mesos.TaskState_TASK_ERROR, mesos.TaskState_TASK_FAILED,
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mesos.TaskState_TASK_KILLED, mesos.TaskState_TASK_LOST:
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lmt = elekLogDef.ERROR
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case mesos.TaskState_TASK_FINISHED:
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lmt = elekLogDef.SUCCESS
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default:
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lmt = elekLogDef.GENERAL
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}
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msgColor := elekLogDef.LogMessageColors[lmt]
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msg := elekLogDef.LogMessageColors[elekLogDef.GENERAL].Sprintf("Task Status received for task [%s] --> %s",
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*status.TaskId.Value, msgColor.Sprint(NameFor(status.State)))
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s.Log(lmt, msg)
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}
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func (s *BaseScheduler) LogSchedPolicySwitch(name string, nextPolicy SchedPolicyState) {
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logSPS := func() {
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s.Log(elekLogDef.SPS, name)
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}
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if s.hasReceivedResourceOffers && (s.curSchedPolicy != nextPolicy) {
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logSPS()
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} else if !s.hasReceivedResourceOffers {
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logSPS()
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}
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// Logging the size of the scheduling window and the scheduling policy
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// that is going to schedule the tasks in the scheduling window.
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s.Log(elekLogDef.SCHED_WINDOW, fmt.Sprintf("%d %s", s.schedWindowSize, name))
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}
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func (s *BaseScheduler) LogClsfnAndTaskDistOverhead(overhead time.Duration) {
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// Logging the overhead in microseconds.
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s.Log(elekLogDef.CLSFN_TASKDIST_OVERHEAD, fmt.Sprintf("%f", float64(overhead.Nanoseconds())/1000.0))
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}
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