mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-14 02:10:21 +00:00
108 lines
3.0 KiB
Go
108 lines
3.0 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 provides abstractions for registering which metrics
|
|
// to record.
|
|
package metrics
|
|
|
|
import (
|
|
"net/url"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
var registerMetrics sync.Once
|
|
|
|
// DurationMetric is a measurement of some amount of time.
|
|
type DurationMetric interface {
|
|
Observe(duration time.Duration)
|
|
}
|
|
|
|
// ExpiryMetric sets some time of expiry. If nil, assume not relevant.
|
|
type ExpiryMetric interface {
|
|
Set(expiry *time.Time)
|
|
}
|
|
|
|
// LatencyMetric observes client latency partitioned by verb and url.
|
|
type LatencyMetric interface {
|
|
Observe(verb string, u url.URL, latency time.Duration)
|
|
}
|
|
|
|
// ResultMetric counts response codes partitioned by method and host.
|
|
type ResultMetric interface {
|
|
Increment(code string, method string, host string)
|
|
}
|
|
|
|
var (
|
|
// ClientCertExpiry is the expiry time of a client certificate
|
|
ClientCertExpiry ExpiryMetric = noopExpiry{}
|
|
// ClientCertRotationAge is the age of a certificate that has just been rotated.
|
|
ClientCertRotationAge DurationMetric = noopDuration{}
|
|
// RequestLatency is the latency metric that rest clients will update.
|
|
RequestLatency LatencyMetric = noopLatency{}
|
|
// RateLimiterLatency is the client side rate limiter latency metric.
|
|
RateLimiterLatency LatencyMetric = noopLatency{}
|
|
// RequestResult is the result metric that rest clients will update.
|
|
RequestResult ResultMetric = noopResult{}
|
|
)
|
|
|
|
// RegisterOpts contains all the metrics to register. Metrics may be nil.
|
|
type RegisterOpts struct {
|
|
ClientCertExpiry ExpiryMetric
|
|
ClientCertRotationAge DurationMetric
|
|
RequestLatency LatencyMetric
|
|
RateLimiterLatency LatencyMetric
|
|
RequestResult ResultMetric
|
|
}
|
|
|
|
// Register registers metrics for the rest client to use. This can
|
|
// only be called once.
|
|
func Register(opts RegisterOpts) {
|
|
registerMetrics.Do(func() {
|
|
if opts.ClientCertExpiry != nil {
|
|
ClientCertExpiry = opts.ClientCertExpiry
|
|
}
|
|
if opts.ClientCertRotationAge != nil {
|
|
ClientCertRotationAge = opts.ClientCertRotationAge
|
|
}
|
|
if opts.RequestLatency != nil {
|
|
RequestLatency = opts.RequestLatency
|
|
}
|
|
if opts.RateLimiterLatency != nil {
|
|
RateLimiterLatency = opts.RateLimiterLatency
|
|
}
|
|
if opts.RequestResult != nil {
|
|
RequestResult = opts.RequestResult
|
|
}
|
|
})
|
|
}
|
|
|
|
type noopDuration struct{}
|
|
|
|
func (noopDuration) Observe(time.Duration) {}
|
|
|
|
type noopExpiry struct{}
|
|
|
|
func (noopExpiry) Set(*time.Time) {}
|
|
|
|
type noopLatency struct{}
|
|
|
|
func (noopLatency) Observe(string, url.URL, time.Duration) {}
|
|
|
|
type noopResult struct{}
|
|
|
|
func (noopResult) Increment(string, string, string) {}
|