mirror of https://github.com/k3s-io/k3s
95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
/*
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Copyright 2019 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 legacyregistry
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import (
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"net/http"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"k8s.io/component-base/metrics"
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)
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var (
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defaultRegistry = metrics.NewKubeRegistry()
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// DefaultGatherer exposes the global registry gatherer
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DefaultGatherer metrics.Gatherer = defaultRegistry
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)
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func init() {
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RawMustRegister(prometheus.NewProcessCollector(prometheus.ProcessCollectorOpts{}))
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RawMustRegister(prometheus.NewGoCollector())
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}
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// Handler returns an HTTP handler for the DefaultGatherer. It is
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// already instrumented with InstrumentHandler (using "prometheus" as handler
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// name).
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//
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// Deprecated: Please note the issues described in the doc comment of
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// InstrumentHandler. You might want to consider using promhttp.Handler instead.
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func Handler() http.Handler {
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return promhttp.InstrumentMetricHandler(prometheus.DefaultRegisterer, promhttp.HandlerFor(defaultRegistry, promhttp.HandlerOpts{}))
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}
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// Register registers a collectable metric but uses the global registry
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func Register(c metrics.Registerable) error {
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err := defaultRegistry.Register(c)
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return err
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}
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// MustRegister registers registerable metrics but uses the global registry.
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func MustRegister(cs ...metrics.Registerable) {
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defaultRegistry.MustRegister(cs...)
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}
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// RawMustRegister registers prometheus collectors but uses the global registry, this
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// bypasses the metric stability framework
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//
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// Deprecated
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func RawMustRegister(cs ...prometheus.Collector) {
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defaultRegistry.RawMustRegister(cs...)
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}
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// RawRegister registers a prometheus collector but uses the global registry, this
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// bypasses the metric stability framework
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//
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// Deprecated
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func RawRegister(c prometheus.Collector) error {
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err := defaultRegistry.RawRegister(c)
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return err
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}
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// CustomRegister registers a custom collector but uses the global registry.
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func CustomRegister(c metrics.StableCollector) error {
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err := defaultRegistry.CustomRegister(c)
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//TODO(RainbowMango): Maybe we can wrap this error by error wrapping.(Golang 1.13)
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_ = prometheus.Register(c)
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return err
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}
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// CustomMustRegister registers custom collectors but uses the global registry.
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func CustomMustRegister(cs ...metrics.StableCollector) {
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defaultRegistry.CustomMustRegister(cs...)
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for _, c := range cs {
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prometheus.MustRegister(c)
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}
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}
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