mirror of
https://github.com/prometheus/node_exporter.git
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90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
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// Copyright 2016 The Prometheus 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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//
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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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package version
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import (
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"bytes"
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"fmt"
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"runtime"
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"strings"
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"text/template"
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"github.com/prometheus/client_golang/prometheus"
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)
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// Build information. Populated at build-time.
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var (
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Version string
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Revision string
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Branch string
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BuildUser string
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BuildDate string
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GoVersion = runtime.Version()
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)
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// NewCollector returns a collector which exports metrics about current version information.
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func NewCollector(program string) *prometheus.GaugeVec {
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buildInfo := prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: program,
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Name: "build_info",
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Help: fmt.Sprintf(
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"A metric with a constant '1' value labeled by version, revision, branch, and goversion from which %s was built.",
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program,
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),
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},
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[]string{"version", "revision", "branch", "goversion"},
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)
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buildInfo.WithLabelValues(Version, Revision, Branch, GoVersion).Set(1)
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return buildInfo
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}
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// versionInfoTmpl contains the template used by Info.
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var versionInfoTmpl = `
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{{.program}}, version {{.version}} (branch: {{.branch}}, revision: {{.revision}})
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build user: {{.buildUser}}
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build date: {{.buildDate}}
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go version: {{.goVersion}}
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`
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// Print returns version information.
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func Print(program string) string {
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m := map[string]string{
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"program": program,
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"version": Version,
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"revision": Revision,
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"branch": Branch,
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"buildUser": BuildUser,
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"buildDate": BuildDate,
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"goVersion": GoVersion,
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}
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t := template.Must(template.New("version").Parse(versionInfoTmpl))
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var buf bytes.Buffer
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if err := t.ExecuteTemplate(&buf, "version", m); err != nil {
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panic(err)
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}
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return strings.TrimSpace(buf.String())
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}
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// Info returns version, branch and revision information.
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func Info() string {
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return fmt.Sprintf("(version=%s, branch=%s, revision=%s)", Version, Branch, Revision)
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}
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// BuildContext returns goVersion, buildUser and buildDate information.
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func BuildContext() string {
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return fmt.Sprintf("(go=%s, user=%s, date=%s)", GoVersion, BuildUser, BuildDate)
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}
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