metrics.go

Documentation: k8s.io/kubernetes/pkg/controller/volume/ephemeral/metrics

     1  /*
     2  Copyright 2021 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package metrics
    18  
    19  import (
    20  	"sync"
    21  
    22  	"k8s.io/component-base/metrics"
    23  	"k8s.io/component-base/metrics/legacyregistry"
    24  )
    25  
    26  // EphemeralVolumeSubsystem - subsystem name used for Endpoint Slices.
    27  const EphemeralVolumeSubsystem = "ephemeral_volume_controller"
    28  
    29  var (
    30  	// EphemeralVolumeCreateAttempts tracks the number of
    31  	// PersistentVolumeClaims().Create calls (both successful and unsuccessful)
    32  	EphemeralVolumeCreateAttempts = metrics.NewCounter(
    33  		&metrics.CounterOpts{
    34  			Subsystem:      EphemeralVolumeSubsystem,
    35  			Name:           "create_total",
    36  			Help:           "Number of PersistenVolumeClaims creation requests",
    37  			StabilityLevel: metrics.ALPHA,
    38  		})
    39  	// EphemeralVolumeCreateFailures tracks the number of unsuccessful
    40  	// PersistentVolumeClaims().Create calls
    41  	EphemeralVolumeCreateFailures = metrics.NewCounter(
    42  		&metrics.CounterOpts{
    43  			Subsystem:      EphemeralVolumeSubsystem,
    44  			Name:           "create_failures_total",
    45  			Help:           "Number of PersistenVolumeClaims creation requests",
    46  			StabilityLevel: metrics.ALPHA,
    47  		})
    48  )
    49  
    50  var registerMetrics sync.Once
    51  
    52  // RegisterMetrics registers EphemeralVolume metrics.
    53  func RegisterMetrics() {
    54  	registerMetrics.Do(func() {
    55  		legacyregistry.MustRegister(EphemeralVolumeCreateAttempts)
    56  		legacyregistry.MustRegister(EphemeralVolumeCreateFailures)
    57  	})
    58  }
    59
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