75 lines
3.5 KiB
Go
75 lines
3.5 KiB
Go
package schedulers
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import (
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"bitbucket.org/sunybingcloud/elektron/def"
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elecLogDef "bitbucket.org/sunybingcloud/elektron/logging/def"
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mesos "github.com/mesos/mesos-go/api/v0/mesosproto"
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sched "github.com/mesos/mesos-go/api/v0/scheduler"
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)
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// Implements mesos scheduler.
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type ElectronScheduler interface {
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sched.Scheduler
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init(opts ...schedulerOptions)
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// Interface for log messages.
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// Every ElectronScheduler implementer should provide definitions for these functions.
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// This interface serves as a template to maintain consistent log messages.
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// Each of these functions are supposed to call the Log(...) that sends the
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// log message type, and the log message to the corresponding channels.
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// Pass the logMessageType and the logMessage to the loggers for logging.
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Log(logMType elecLogDef.LogMessageType, logMsg string)
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// To be called when about to launch a task.
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// Log message indicating that a task is about to start executing.
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// Also, log the host on which the task is going to be launched.
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LogTaskStarting(ts *def.Task, offer *mesos.Offer)
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// To be called when an offer is taken.
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// Log the chosen watts attribute for the task that has fit an offer.
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LogTaskWattsConsideration(ts def.Task, host string, wattsToConsider float64)
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// To be called when offers are received from Mesos.
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// Log the number of offers received and/or information about the received offers.
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LogOffersReceived(offers []*mesos.Offer)
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// To be called when a scheduling policy declines Mesos offers, as
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// there are no tasks pending to be scheduled.
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// Log the host information corresponding to the offers that were declined.
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LogNoPendingTasksDeclineOffers(offers *mesos.Offer)
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// Log the number of tasks that are currently executing on the cluster.
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LogNumberOfRunningTasks()
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// To be called when a task fits a Mesos offer.
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// Log information on the tasks that the new task is going to be coLocated with.
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// Uses the coLocated(...) utility in helpers.go.
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LogCoLocatedTasks(slaveID string)
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// Log the scheduled trace of task.
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// The schedTrace includes the TaskID and the hostname of the node
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// where is the task is going to be launched.
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LogSchedTrace(taskToSchedule *mesos.TaskInfo, offer *mesos.Offer)
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// To be called when all the tasks have completed executing.
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// Log message indicating that Electron has scheduled all the tasks.
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LogTerminateScheduler()
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// To be called when the offer is not consumed.
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// Log message to indicate that the offer had insufficient resources.
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LogInsufficientResourcesDeclineOffer(offer *mesos.Offer, offerResources ...interface{})
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// To be called when offer is rescinded by Mesos.
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LogOfferRescinded(offerID *mesos.OfferID)
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// To be called when Mesos agent is lost
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LogSlaveLost(slaveID *mesos.SlaveID)
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// To be called when executor lost.
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LogExecutorLost(executorID *mesos.ExecutorID, slaveID *mesos.SlaveID)
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// Log a mesos error
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LogMesosError(err string)
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// Log an Electron error
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LogElectronError(err error)
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// Log Framework message
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LogFrameworkMessage(executorID *mesos.ExecutorID, slaveID *mesos.SlaveID, message string)
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// Log Framework has been registered
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LogFrameworkRegistered(frameworkID *mesos.FrameworkID, masterInfo *mesos.MasterInfo)
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// Log Framework has been re-registered
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LogFrameworkReregistered(masterInfo *mesos.MasterInfo)
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// Log Framework has been disconnected from the Mesos master
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LogDisconnected()
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// Log Status update of a task
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LogTaskStatusUpdate(status *mesos.TaskStatus)
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// Log Scheduling policy switches (if any)
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LogSchedulingPolicySwitch()
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}
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