metrics.go

Documentation: go.etcd.io/etcd/server/v3/auth

     1  // Copyright 2015 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package auth
    16  
    17  import (
    18  	"sync"
    19  
    20  	"github.com/prometheus/client_golang/prometheus"
    21  )
    22  
    23  var (
    24  	currentAuthRevision = prometheus.NewGaugeFunc(prometheus.GaugeOpts{
    25  		Namespace: "etcd_debugging",
    26  		Subsystem: "auth",
    27  		Name:      "revision",
    28  		Help:      "The current revision of auth store.",
    29  	},
    30  		func() float64 {
    31  			reportCurrentAuthRevMu.RLock()
    32  			defer reportCurrentAuthRevMu.RUnlock()
    33  			return reportCurrentAuthRev()
    34  		},
    35  	)
    36  	// overridden by auth store initialization
    37  	reportCurrentAuthRevMu sync.RWMutex
    38  	reportCurrentAuthRev   = func() float64 { return 0 }
    39  )
    40  
    41  func init() {
    42  	prometheus.MustRegister(currentAuthRevision)
    43  }
    44
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