85 lines
2.7 KiB
Go
85 lines
2.7 KiB
Go
// /*
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// Copyright 2020 The KubeSphere Authors.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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//
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package metrics
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import (
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"net/http"
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"github.com/emicklei/go-restful"
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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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apimachineryversion "k8s.io/apimachinery/pkg/version"
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compbasemetrics "k8s.io/component-base/metrics"
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ksVersion "kubesphere.io/kubesphere/pkg/version"
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)
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var (
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Defaults DefaultMetrics
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defaultRegistry compbasemetrics.KubeRegistry
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// MustRegister registers registerable metrics but uses the defaultRegistry, panic upon the first registration that causes an error
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MustRegister func(...compbasemetrics.Registerable)
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// Register registers a collectable metric but uses the defaultRegistry
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Register func(compbasemetrics.Registerable) error
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RawMustRegister func(...prometheus.Collector)
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)
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func init() {
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compbasemetrics.BuildVersion = versionGet
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defaultRegistry = compbasemetrics.NewKubeRegistry()
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MustRegister = defaultRegistry.MustRegister
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Register = defaultRegistry.Register
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RawMustRegister = defaultRegistry.RawMustRegister
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}
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// DefaultMetrics installs the default prometheus metrics handler
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type DefaultMetrics struct{}
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// Install adds the DefaultMetrics handler
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func (m DefaultMetrics) Install(c *restful.Container) {
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RawMustRegister(prometheus.NewProcessCollector(prometheus.ProcessCollectorOpts{}))
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RawMustRegister(prometheus.NewGoCollector())
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c.Handle("/kapis/metrics", Handler())
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}
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//Overwrite version.Get
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func versionGet() apimachineryversion.Info {
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info := ksVersion.Get()
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return apimachineryversion.Info{
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Major: info.GitMajor,
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Minor: info.GitMinor,
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GitVersion: info.GitVersion,
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GitCommit: info.GitCommit,
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GitTreeState: info.GitTreeState,
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BuildDate: info.BuildDate,
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GoVersion: info.GoVersion,
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Compiler: info.Compiler,
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Platform: info.Platform,
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}
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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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func Handler() http.Handler {
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return promhttp.InstrumentMetricHandler(prometheus.NewRegistry(), promhttp.HandlerFor(defaultRegistry, promhttp.HandlerOpts{}))
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}
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