mirror of
https://github.com/ceph/ceph-csi.git
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303 lines
12 KiB
Go
303 lines
12 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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"k8s.io/component-base/metrics"
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"k8s.io/component-base/metrics/legacyregistry"
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volumeschedulingmetrics "k8s.io/kubernetes/pkg/controller/volume/scheduling/metrics"
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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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// DeprecatedSchedulingDurationName - scheduler duration metric name which is deprecated
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DeprecatedSchedulingDurationName = "scheduling_duration_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 = metrics.NewCounterVec(
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&metrics.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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StabilityLevel: metrics.ALPHA,
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}, []string{"result"})
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// PodScheduleSuccesses counts how many pods were scheduled.
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// This metric will be initialized again in Register() to assure the metric is not no-op metric.
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PodScheduleSuccesses = scheduleAttempts.With(metrics.Labels{"result": "scheduled"})
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// PodScheduleFailures counts how many pods could not be scheduled.
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// This metric will be initialized again in Register() to assure the metric is not no-op metric.
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PodScheduleFailures = scheduleAttempts.With(metrics.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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// This metric will be initialized again in Register() to assure the metric is not no-op metric.
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PodScheduleErrors = scheduleAttempts.With(metrics.Labels{"result": "error"})
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DeprecatedSchedulingDuration = metrics.NewSummaryVec(
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&metrics.SummaryOpts{
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Subsystem: SchedulerSubsystem,
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Name: DeprecatedSchedulingDurationName,
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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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StabilityLevel: metrics.ALPHA,
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DeprecatedVersion: "1.19.0",
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},
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[]string{OperationLabel},
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)
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E2eSchedulingLatency = metrics.NewHistogram(
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&metrics.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: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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},
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)
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SchedulingAlgorithmLatency = metrics.NewHistogram(
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&metrics.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: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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},
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)
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DeprecatedSchedulingAlgorithmPredicateEvaluationSecondsDuration = metrics.NewHistogram(
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&metrics.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: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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DeprecatedVersion: "1.19.0",
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},
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)
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DeprecatedSchedulingAlgorithmPriorityEvaluationSecondsDuration = metrics.NewHistogram(
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&metrics.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: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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DeprecatedVersion: "1.19.0",
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},
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)
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SchedulingAlgorithmPreemptionEvaluationDuration = metrics.NewHistogram(
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&metrics.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: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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},
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)
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BindingLatency = metrics.NewHistogram(
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&metrics.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: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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},
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)
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PreemptionVictims = metrics.NewHistogram(
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&metrics.HistogramOpts{
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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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// we think #victims>50 is pretty rare, therefore [50, +Inf) is considered a single bucket.
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Buckets: metrics.LinearBuckets(5, 5, 10),
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StabilityLevel: metrics.ALPHA,
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})
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PreemptionAttempts = metrics.NewCounter(
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&metrics.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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StabilityLevel: metrics.ALPHA,
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})
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pendingPods = metrics.NewGaugeVec(
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&metrics.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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StabilityLevel: metrics.ALPHA,
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}, []string{"queue"})
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SchedulerGoroutines = metrics.NewGaugeVec(
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&metrics.GaugeOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduler_goroutines",
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Help: "Number of running goroutines split by the work they do such as binding.",
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StabilityLevel: metrics.ALPHA,
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}, []string{"work"})
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PodSchedulingDuration = metrics.NewHistogram(
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&metrics.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "pod_scheduling_duration_seconds",
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Help: "E2e latency for a pod being scheduled which may include multiple scheduling attempts.",
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// Start with 1ms with the last bucket being [~16s, Inf)
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Buckets: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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})
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PodSchedulingAttempts = metrics.NewHistogram(
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&metrics.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "pod_scheduling_attempts",
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Help: "Number of attempts to successfully schedule a pod.",
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Buckets: metrics.ExponentialBuckets(1, 2, 5),
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StabilityLevel: metrics.ALPHA,
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})
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FrameworkExtensionPointDuration = metrics.NewHistogramVec(
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&metrics.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "framework_extension_point_duration_seconds",
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Help: "Latency for running all plugins of a specific extension point.",
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// Start with 0.1ms with the last bucket being [~200ms, Inf)
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Buckets: metrics.ExponentialBuckets(0.0001, 2, 12),
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StabilityLevel: metrics.ALPHA,
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},
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[]string{"extension_point", "status"})
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PluginExecutionDuration = metrics.NewHistogramVec(
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&metrics.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "plugin_execution_duration_seconds",
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Help: "Duration for running a plugin at a specific extension point.",
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// Start with 0.01ms with the last bucket being [~22ms, Inf). We use a small factor (1.5)
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// so that we have better granularity since plugin latency is very sensitive.
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Buckets: metrics.ExponentialBuckets(0.00001, 1.5, 20),
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StabilityLevel: metrics.ALPHA,
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},
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[]string{"plugin", "extension_point", "status"})
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SchedulerQueueIncomingPods = metrics.NewCounterVec(
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&metrics.CounterOpts{
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Subsystem: SchedulerSubsystem,
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Name: "queue_incoming_pods_total",
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Help: "Number of pods added to scheduling queues by event and queue type.",
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StabilityLevel: metrics.ALPHA,
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}, []string{"queue", "event"})
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PermitWaitDuration = metrics.NewHistogramVec(
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&metrics.HistogramOpts{
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Subsystem: SchedulerSubsystem,
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Name: "permit_wait_duration_seconds",
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Help: "Duration of waiting on permit.",
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Buckets: metrics.ExponentialBuckets(0.001, 2, 15),
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StabilityLevel: metrics.ALPHA,
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},
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[]string{"result"})
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CacheSize = metrics.NewGaugeVec(
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&metrics.GaugeOpts{
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Subsystem: SchedulerSubsystem,
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Name: "scheduler_cache_size",
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Help: "Number of nodes, pods, and assumed (bound) pods in the scheduler cache.",
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StabilityLevel: metrics.ALPHA,
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}, []string{"type"})
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metricsList = []metrics.Registerable{
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scheduleAttempts,
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DeprecatedSchedulingDuration,
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E2eSchedulingLatency,
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SchedulingAlgorithmLatency,
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BindingLatency,
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DeprecatedSchedulingAlgorithmPredicateEvaluationSecondsDuration,
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DeprecatedSchedulingAlgorithmPriorityEvaluationSecondsDuration,
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SchedulingAlgorithmPreemptionEvaluationDuration,
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PreemptionVictims,
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PreemptionAttempts,
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pendingPods,
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PodSchedulingDuration,
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PodSchedulingAttempts,
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FrameworkExtensionPointDuration,
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PluginExecutionDuration,
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SchedulerQueueIncomingPods,
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SchedulerGoroutines,
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PermitWaitDuration,
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CacheSize,
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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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legacyregistry.MustRegister(metric)
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}
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volumeschedulingmetrics.RegisterVolumeSchedulingMetrics()
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PodScheduleSuccesses = scheduleAttempts.With(metrics.Labels{"result": "scheduled"})
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PodScheduleFailures = scheduleAttempts.With(metrics.Labels{"result": "unschedulable"})
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PodScheduleErrors = scheduleAttempts.With(metrics.Labels{"result": "error"})
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})
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}
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// GetGather returns the gatherer. It used by test case outside current package.
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func GetGather() metrics.Gatherer {
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return legacyregistry.DefaultGatherer
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}
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// ActivePods returns the pending pods metrics with the label active
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func ActivePods() metrics.GaugeMetric {
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return pendingPods.With(metrics.Labels{"queue": "active"})
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}
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// BackoffPods returns the pending pods metrics with the label backoff
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func BackoffPods() metrics.GaugeMetric {
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return pendingPods.With(metrics.Labels{"queue": "backoff"})
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}
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// UnschedulablePods returns the pending pods metrics with the label unschedulable
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func UnschedulablePods() metrics.GaugeMetric {
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return pendingPods.With(metrics.Labels{"queue": "unschedulable"})
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}
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// Reset resets metrics
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func Reset() {
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DeprecatedSchedulingDuration.Reset()
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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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