k8s中如何实现SchedulingLatency 指标查看

k8s中如何实现SchedulingLatency 指标查看，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。

1.1. metrics.go指标定义

pkg/scheduler/metrics/metrics.go

 SchedulingLatency = prometheus.NewSummaryVec(
      prometheus.SummaryOpts{
         Subsystem: SchedulerSubsystem,
         Name:      SchedulingLatencyName,
         Help:      "Scheduling latency in seconds split by sub-parts of the scheduling operation",
         // Make the sliding window of 5h.
         // TODO: The value for this should be based on some SLI definition (long term).
         MaxAge: 5 * time.Hour,
      },
      []string{OperationLabel},

   )

第64行：Scheduling latency in seconds split by sub-parts of the scheduling operation

一次调度被分割为子组件的操作时间的和

1.1. scheduler.go调度入口

1.1.1. pkg/scheduler/scheduler.go

// Run begins watching and scheduling. It waits for cache to be synced, then starts a goroutine and returns immediately.
func (sched *Scheduler) Run() {
   if !sched.config.WaitForCacheSync() {
      return
   }

   go wait.Until(sched.scheduleOne, 0, sched.config.StopEverything)
}

1.1.1. 核心调度逻辑顺序

1. sched.schedule

2. sched.assumeVolumes

3. sched.assume

4. sched.bindVolumes

5. sched.Cache

6. sched.bind

1.1. generic_scheduler.go调度算法实现

1.1.1. pkg/scheduler/core/generic_scheduler.go

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