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add short_version label to vm_app_version metric (#877)

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* add short_version label to vm_app_version metric

use case:  Version panel of Grafana dashboard should use a live query, but currently it uses a template query which becomes stale.  Grafana is not able to preform regex substitution on labels.

* Update metrics.go

* fix compile
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John Belmonte 2020-11-03 21:10:42 +09:00 committed by GitHub
parent cd071357d8
commit 51e661ecfe
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1 changed files with 5 additions and 1 deletions
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6
lib/httpserver/metrics.go
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@ -4,6 +4,7 @@ import (
"flag"
"fmt"
"io"
"regexp"
"strings"
"time"
@ -13,11 +14,14 @@ import (
"github.com/VictoriaMetrics/metrics"
)
var versionRe = regexp.MustCompile(`v\d+\.\d+\.\d+`)
// WritePrometheusMetrics writes all the registered metrics to w in Prometheus exposition format.
func WritePrometheusMetrics(w io.Writer) {
metrics.WritePrometheus(w, true)
fmt.Fprintf(w, "vm_app_version{version=%q} 1\n", buildinfo.Version)
fmt.Fprintf(w, "vm_app_version{version=%q, short_version=%q} 1\n", buildinfo.Version,
versionRe.FindString(buildinfo.Version))
fmt.Fprintf(w, "vm_allowed_memory_bytes %d\n", memory.Allowed())
// Export start time and uptime in seconds