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app/vmalert/templates: add toTime() template function in the same way as Prometheus 2.38 does

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See https://github.com/prometheus/prometheus/pull/10993
This commit is contained in:
Aliaksandr Valialkin 2022-08-15 00:49:29 +03:00
parent 511805d88d
commit d335694add
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2 changed files with 18 additions and 5 deletions
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22
app/vmalert/templates/template.go
View file

@ -373,10 +373,23 @@ func templateFuncs() textTpl.FuncMap {
if math.IsNaN(v) || math.IsInf(v, 0) {
return fmt.Sprintf("%.4g", v), nil
}
t := TimeFromUnixNano(int64(v * 1e9)).Time().UTC()
t := timeFromUnixTimestamp(v).Time().UTC()
return fmt.Sprint(t), nil
},
// toTime converts given timestamp to a time.Time.
"toTime": func(i interface{}) (time.Time, error) {
v, err := toFloat64(i)
if err != nil {
return time.Time{}, err
}
if math.IsNaN(v) || math.IsInf(v, 0) {
return time.Time{}, fmt.Errorf("cannot convert %v to time.Time", v)
}
t := timeFromUnixTimestamp(v).Time().UTC()
return t, nil
},
/* URLs */
// externalURL returns value of `external.url` flag
@ -492,10 +505,9 @@ func templateFuncs() textTpl.FuncMap {
// (1970-01-01 00:00 UTC) excluding leap seconds.
type Time int64
// TimeFromUnixNano returns the Time equivalent to the Unix Time
// t provided in nanoseconds.
func TimeFromUnixNano(t int64) Time {
return Time(t / nanosPerTick)
// timeFromUnixTimestamp returns the Time equivalent to t in unix timestamp.
func timeFromUnixTimestamp(t float64) Time {
return Time(t * 1e3)
}
// The number of nanoseconds per minimum tick.

1
docs/CHANGELOG.md
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@ -19,6 +19,7 @@ The following tip changes can be tested by building VictoriaMetrics components f
* FEATURE: [VictoriaMetrics cluster](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): improve performance for heavy queries on systems with many CPU cores.
* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): add support for MX record types in [dns_sd_configs](https://docs.victoriametrics.com/sd_configs.html#dns_sd_configs) in the same way as Prometheus 2.38 [does](https://github.com/prometheus/prometheus/pull/10099).
* FEATURE: [vmalert](https://docs.victoriametrics.com/vmalert.html): add `toTime()` template function in the same way as Prometheus 2.38 [does](https://github.com/prometheus/prometheus/pull/10993). See [these docs](https://prometheus.io/docs/prometheus/latest/configuration/template_reference/#numbers).
* BUGFIX: prevent from excess CPU usage when the storage enters [read-only mode](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#readonly-mode).