mirror of https://github.com/k3s-io/k3s
228 lines
8.1 KiB
Go
228 lines
8.1 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package metrics
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
"k8s.io/component-base/metrics"
|
|
"k8s.io/component-base/metrics/legacyregistry"
|
|
volumeschedulingmetrics "k8s.io/kubernetes/pkg/controller/volume/scheduling/metrics"
|
|
)
|
|
|
|
const (
|
|
// SchedulerSubsystem - subsystem name used by scheduler
|
|
SchedulerSubsystem = "scheduler"
|
|
// Below are possible values for the operation label. Each represents a substep of e2e scheduling:
|
|
|
|
// PrioritizingExtender - prioritizing extender operation label value
|
|
PrioritizingExtender = "prioritizing_extender"
|
|
// Binding - binding operation label value
|
|
Binding = "binding"
|
|
// E2eScheduling - e2e scheduling operation label value
|
|
)
|
|
|
|
// All the histogram based metrics have 1ms as size for the smallest bucket.
|
|
var (
|
|
scheduleAttempts = metrics.NewCounterVec(
|
|
&metrics.CounterOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "schedule_attempts_total",
|
|
Help: "Number of attempts to schedule pods, by the result. 'unschedulable' means a pod could not be scheduled, while 'error' means an internal scheduler problem.",
|
|
StabilityLevel: metrics.ALPHA,
|
|
}, []string{"result", "profile"})
|
|
|
|
e2eSchedulingLatency = metrics.NewHistogramVec(
|
|
&metrics.HistogramOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "e2e_scheduling_duration_seconds",
|
|
Help: "E2e scheduling latency in seconds (scheduling algorithm + binding)",
|
|
Buckets: metrics.ExponentialBuckets(0.001, 2, 15),
|
|
StabilityLevel: metrics.ALPHA,
|
|
}, []string{"result", "profile"})
|
|
SchedulingAlgorithmLatency = metrics.NewHistogram(
|
|
&metrics.HistogramOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "scheduling_algorithm_duration_seconds",
|
|
Help: "Scheduling algorithm latency in seconds",
|
|
Buckets: metrics.ExponentialBuckets(0.001, 2, 15),
|
|
StabilityLevel: metrics.ALPHA,
|
|
},
|
|
)
|
|
PreemptionVictims = metrics.NewHistogram(
|
|
&metrics.HistogramOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "preemption_victims",
|
|
Help: "Number of selected preemption victims",
|
|
// we think #victims>50 is pretty rare, therefore [50, +Inf) is considered a single bucket.
|
|
Buckets: metrics.LinearBuckets(5, 5, 10),
|
|
StabilityLevel: metrics.ALPHA,
|
|
})
|
|
PreemptionAttempts = metrics.NewCounter(
|
|
&metrics.CounterOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "preemption_attempts_total",
|
|
Help: "Total preemption attempts in the cluster till now",
|
|
StabilityLevel: metrics.ALPHA,
|
|
})
|
|
pendingPods = metrics.NewGaugeVec(
|
|
&metrics.GaugeOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "pending_pods",
|
|
Help: "Number of pending pods, by the queue type. 'active' means number of pods in activeQ; 'backoff' means number of pods in backoffQ; 'unschedulable' means number of pods in unschedulableQ.",
|
|
StabilityLevel: metrics.ALPHA,
|
|
}, []string{"queue"})
|
|
SchedulerGoroutines = metrics.NewGaugeVec(
|
|
&metrics.GaugeOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "scheduler_goroutines",
|
|
Help: "Number of running goroutines split by the work they do such as binding.",
|
|
StabilityLevel: metrics.ALPHA,
|
|
}, []string{"work"})
|
|
|
|
PodSchedulingDuration = metrics.NewHistogramVec(
|
|
&metrics.HistogramOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "pod_scheduling_duration_seconds",
|
|
Help: "E2e latency for a pod being scheduled which may include multiple scheduling attempts.",
|
|
// Start with 10ms with the last bucket being [~88m, Inf).
|
|
Buckets: metrics.ExponentialBuckets(0.01, 2, 20),
|
|
StabilityLevel: metrics.ALPHA,
|
|
},
|
|
[]string{"attempts"})
|
|
|
|
PodSchedulingAttempts = metrics.NewHistogram(
|
|
&metrics.HistogramOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "pod_scheduling_attempts",
|
|
Help: "Number of attempts to successfully schedule a pod.",
|
|
Buckets: metrics.ExponentialBuckets(1, 2, 5),
|
|
StabilityLevel: metrics.ALPHA,
|
|
})
|
|
|
|
FrameworkExtensionPointDuration = metrics.NewHistogramVec(
|
|
&metrics.HistogramOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "framework_extension_point_duration_seconds",
|
|
Help: "Latency for running all plugins of a specific extension point.",
|
|
// Start with 0.1ms with the last bucket being [~200ms, Inf)
|
|
Buckets: metrics.ExponentialBuckets(0.0001, 2, 12),
|
|
StabilityLevel: metrics.ALPHA,
|
|
},
|
|
[]string{"extension_point", "status", "profile"})
|
|
|
|
PluginExecutionDuration = metrics.NewHistogramVec(
|
|
&metrics.HistogramOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "plugin_execution_duration_seconds",
|
|
Help: "Duration for running a plugin at a specific extension point.",
|
|
// Start with 0.01ms with the last bucket being [~22ms, Inf). We use a small factor (1.5)
|
|
// so that we have better granularity since plugin latency is very sensitive.
|
|
Buckets: metrics.ExponentialBuckets(0.00001, 1.5, 20),
|
|
StabilityLevel: metrics.ALPHA,
|
|
},
|
|
[]string{"plugin", "extension_point", "status"})
|
|
|
|
SchedulerQueueIncomingPods = metrics.NewCounterVec(
|
|
&metrics.CounterOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "queue_incoming_pods_total",
|
|
Help: "Number of pods added to scheduling queues by event and queue type.",
|
|
StabilityLevel: metrics.ALPHA,
|
|
}, []string{"queue", "event"})
|
|
|
|
PermitWaitDuration = metrics.NewHistogramVec(
|
|
&metrics.HistogramOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "permit_wait_duration_seconds",
|
|
Help: "Duration of waiting on permit.",
|
|
Buckets: metrics.ExponentialBuckets(0.001, 2, 15),
|
|
StabilityLevel: metrics.ALPHA,
|
|
},
|
|
[]string{"result"})
|
|
|
|
CacheSize = metrics.NewGaugeVec(
|
|
&metrics.GaugeOpts{
|
|
Subsystem: SchedulerSubsystem,
|
|
Name: "scheduler_cache_size",
|
|
Help: "Number of nodes, pods, and assumed (bound) pods in the scheduler cache.",
|
|
StabilityLevel: metrics.ALPHA,
|
|
}, []string{"type"})
|
|
|
|
metricsList = []metrics.Registerable{
|
|
scheduleAttempts,
|
|
e2eSchedulingLatency,
|
|
SchedulingAlgorithmLatency,
|
|
PreemptionVictims,
|
|
PreemptionAttempts,
|
|
pendingPods,
|
|
PodSchedulingDuration,
|
|
PodSchedulingAttempts,
|
|
FrameworkExtensionPointDuration,
|
|
PluginExecutionDuration,
|
|
SchedulerQueueIncomingPods,
|
|
SchedulerGoroutines,
|
|
PermitWaitDuration,
|
|
CacheSize,
|
|
}
|
|
)
|
|
|
|
var registerMetrics sync.Once
|
|
|
|
// Register all metrics.
|
|
func Register() {
|
|
// Register the metrics.
|
|
registerMetrics.Do(func() {
|
|
RegisterMetrics(metricsList...)
|
|
volumeschedulingmetrics.RegisterVolumeSchedulingMetrics()
|
|
})
|
|
}
|
|
|
|
// RegisterMetrics registers a list of metrics.
|
|
// This function is exported because it is intended to be used by out-of-tree plugins to register their custom metrics.
|
|
func RegisterMetrics(extraMetrics ...metrics.Registerable) {
|
|
for _, metric := range extraMetrics {
|
|
legacyregistry.MustRegister(metric)
|
|
}
|
|
}
|
|
|
|
// GetGather returns the gatherer. It used by test case outside current package.
|
|
func GetGather() metrics.Gatherer {
|
|
return legacyregistry.DefaultGatherer
|
|
}
|
|
|
|
// ActivePods returns the pending pods metrics with the label active
|
|
func ActivePods() metrics.GaugeMetric {
|
|
return pendingPods.With(metrics.Labels{"queue": "active"})
|
|
}
|
|
|
|
// BackoffPods returns the pending pods metrics with the label backoff
|
|
func BackoffPods() metrics.GaugeMetric {
|
|
return pendingPods.With(metrics.Labels{"queue": "backoff"})
|
|
}
|
|
|
|
// UnschedulablePods returns the pending pods metrics with the label unschedulable
|
|
func UnschedulablePods() metrics.GaugeMetric {
|
|
return pendingPods.With(metrics.Labels{"queue": "unschedulable"})
|
|
}
|
|
|
|
// SinceInSeconds gets the time since the specified start in seconds.
|
|
func SinceInSeconds(start time.Time) float64 {
|
|
return time.Since(start).Seconds()
|
|
}
|