mirror of https://github.com/k3s-io/k3s
256 lines
9.7 KiB
Go
256 lines
9.7 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package metrics
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import (
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"sync"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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volumescheduling "k8s.io/kubernetes/pkg/controller/volume/scheduling"
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)
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const (
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// SchedulerSubsystem - subsystem name used by scheduler
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SchedulerSubsystem = "scheduler"
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// SchedulingLatencyName - scheduler latency metric name
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SchedulingLatencyName = "scheduling_duration_seconds"
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// DeprecatedSchedulingLatencyName - scheduler latency metric name which is deprecated
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DeprecatedSchedulingLatencyName = "scheduling_latency_seconds"
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// OperationLabel - operation label name
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OperationLabel = "operation"
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// Below are possible values for the operation label. Each represents a substep of e2e scheduling:
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// PredicateEvaluation - predicate evaluation operation label value
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PredicateEvaluation = "predicate_evaluation"
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// PriorityEvaluation - priority evaluation operation label value
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PriorityEvaluation = "priority_evaluation"
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// PreemptionEvaluation - preemption evaluation operation label value (occurs in case of scheduling fitError).
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PreemptionEvaluation = "preemption_evaluation"
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// Binding - binding operation label value
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Binding = "binding"
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// E2eScheduling - e2e scheduling operation label value
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)
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// All the histogram based metrics have 1ms as size for the smallest bucket.
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var (
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scheduleAttempts = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Subsystem: SchedulerSubsystem,
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Name: "schedule_attempts_total",
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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.",
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}, []string{"result"})
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// PodScheduleSuccesses counts how many pods were scheduled.
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PodScheduleSuccesses = scheduleAttempts.With(prometheus.Labels{"result": "scheduled"})
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// PodScheduleFailures counts how many pods could not be scheduled.
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PodScheduleFailures = scheduleAttempts.With(prometheus.Labels{"result": "unschedulable"})
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// PodScheduleErrors counts how many pods could not be scheduled due to a scheduler error.
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PodScheduleErrors = scheduleAttempts.With(prometheus.Labels{"result": "error"})
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SchedulingLatency = prometheus.NewSummaryVec(
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prometheus.SummaryOpts{
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Subsystem: SchedulerSubsystem,
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Name: SchedulingLatencyName,
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Help: "Scheduling latency in seconds split by sub-parts of the scheduling operation",
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// Make the sliding window of 5h.
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// TODO: The value for this should be based on some SLI definition (long term).
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MaxAge: 5 * time.Hour,
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},
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[]string{OperationLabel},
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)
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DeprecatedSchedulingLatency = prometheus.NewSummaryVec(
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prometheus.SummaryOpts{
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Subsystem: SchedulerSubsystem,
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Name: DeprecatedSchedulingLatencyName,
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Help: "(Deprecated) Scheduling latency in seconds split by sub-parts of the scheduling operation",
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// Make the sliding window of 5h.
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// TODO: The value for this should be based on some SLI definition (long term).
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MaxAge: 5 * time.Hour,
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},
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[]string{OperationLabel},
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)
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E2eSchedulingLatency = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "e2e_scheduling_duration_seconds",
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Help: "E2e scheduling latency in seconds (scheduling algorithm + binding)",
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Buckets: prometheus.ExponentialBuckets(0.001, 2, 15),
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},
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)
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DeprecatedE2eSchedulingLatency = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "e2e_scheduling_latency_microseconds",
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Help: "(Deprecated) E2e scheduling latency in microseconds (scheduling algorithm + binding)",
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Buckets: prometheus.ExponentialBuckets(1000, 2, 15),
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},
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)
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SchedulingAlgorithmLatency = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduling_algorithm_duration_seconds",
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Help: "Scheduling algorithm latency in seconds",
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Buckets: prometheus.ExponentialBuckets(0.001, 2, 15),
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},
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)
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DeprecatedSchedulingAlgorithmLatency = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduling_algorithm_latency_microseconds",
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Help: "(Deprecated) Scheduling algorithm latency in microseconds",
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Buckets: prometheus.ExponentialBuckets(1000, 2, 15),
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},
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)
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SchedulingAlgorithmPredicateEvaluationDuration = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduling_algorithm_predicate_evaluation_seconds",
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Help: "Scheduling algorithm predicate evaluation duration in seconds",
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Buckets: prometheus.ExponentialBuckets(0.001, 2, 15),
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},
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)
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DeprecatedSchedulingAlgorithmPredicateEvaluationDuration = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduling_algorithm_predicate_evaluation",
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Help: "(Deprecated) Scheduling algorithm predicate evaluation duration in microseconds",
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Buckets: prometheus.ExponentialBuckets(1000, 2, 15),
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},
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)
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SchedulingAlgorithmPriorityEvaluationDuration = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduling_algorithm_priority_evaluation_seconds",
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Help: "Scheduling algorithm priority evaluation duration in seconds",
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Buckets: prometheus.ExponentialBuckets(0.001, 2, 15),
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},
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)
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DeprecatedSchedulingAlgorithmPriorityEvaluationDuration = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduling_algorithm_priority_evaluation",
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Help: "(Deprecated) Scheduling algorithm priority evaluation duration in microseconds",
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Buckets: prometheus.ExponentialBuckets(1000, 2, 15),
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},
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)
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SchedulingAlgorithmPremptionEvaluationDuration = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduling_algorithm_preemption_evaluation_seconds",
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Help: "Scheduling algorithm preemption evaluation duration in seconds",
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Buckets: prometheus.ExponentialBuckets(0.001, 2, 15),
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},
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)
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DeprecatedSchedulingAlgorithmPremptionEvaluationDuration = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduling_algorithm_preemption_evaluation",
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Help: "(Deprecated) Scheduling algorithm preemption evaluation duration in microseconds",
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Buckets: prometheus.ExponentialBuckets(1000, 2, 15),
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},
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)
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BindingLatency = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "binding_duration_seconds",
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Help: "Binding latency in seconds",
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Buckets: prometheus.ExponentialBuckets(0.001, 2, 15),
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},
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)
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DeprecatedBindingLatency = prometheus.NewHistogram(
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prometheus.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "binding_latency_microseconds",
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Help: "(Deprecated) Binding latency in microseconds",
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Buckets: prometheus.ExponentialBuckets(1000, 2, 15),
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},
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)
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PreemptionVictims = prometheus.NewGauge(
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prometheus.GaugeOpts{
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Subsystem: SchedulerSubsystem,
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Name: "pod_preemption_victims",
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Help: "Number of selected preemption victims",
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})
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PreemptionAttempts = prometheus.NewCounter(
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prometheus.CounterOpts{
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Subsystem: SchedulerSubsystem,
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Name: "total_preemption_attempts",
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Help: "Total preemption attempts in the cluster till now",
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})
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pendingPods = prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Subsystem: SchedulerSubsystem,
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Name: "pending_pods",
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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.",
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}, []string{"queue"})
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ActivePods = pendingPods.With(prometheus.Labels{"queue": "active"})
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BackoffPods = pendingPods.With(prometheus.Labels{"queue": "backoff"})
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UnschedulablePods = pendingPods.With(prometheus.Labels{"queue": "unschedulable"})
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metricsList = []prometheus.Collector{
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scheduleAttempts,
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SchedulingLatency,
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DeprecatedSchedulingLatency,
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E2eSchedulingLatency,
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DeprecatedE2eSchedulingLatency,
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SchedulingAlgorithmLatency,
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DeprecatedSchedulingAlgorithmLatency,
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BindingLatency,
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DeprecatedBindingLatency,
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SchedulingAlgorithmPredicateEvaluationDuration,
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DeprecatedSchedulingAlgorithmPredicateEvaluationDuration,
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SchedulingAlgorithmPriorityEvaluationDuration,
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DeprecatedSchedulingAlgorithmPriorityEvaluationDuration,
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SchedulingAlgorithmPremptionEvaluationDuration,
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DeprecatedSchedulingAlgorithmPremptionEvaluationDuration,
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PreemptionVictims,
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PreemptionAttempts,
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pendingPods,
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}
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)
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var registerMetrics sync.Once
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// Register all metrics.
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func Register() {
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// Register the metrics.
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registerMetrics.Do(func() {
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for _, metric := range metricsList {
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prometheus.MustRegister(metric)
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}
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volumescheduling.RegisterVolumeSchedulingMetrics()
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})
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}
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// Reset resets metrics
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func Reset() {
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SchedulingLatency.Reset()
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DeprecatedSchedulingLatency.Reset()
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}
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// SinceInMicroseconds gets the time since the specified start in microseconds.
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func SinceInMicroseconds(start time.Time) float64 {
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return float64(time.Since(start).Nanoseconds() / time.Microsecond.Nanoseconds())
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}
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// SinceInSeconds gets the time since the specified start in seconds.
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func SinceInSeconds(start time.Time) float64 {
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return time.Since(start).Seconds()
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}
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