mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
5b8450fc1b
app/vmalert: detect alerting rules which don't match any series at all
vmalert starts to understand /query responses which contain object:
```
"stats":{"seriesFetched": "42"}
```
If object is present, vmalert parses it and populates a new field
`SeriesFetched`. This field is then used to populate the new metric
`vmalert_alerting_rules_last_evaluation_series_fetched` and to
display warnings in the vmalert's UI.
If response doesn't contain the new object (Prometheus or
VictoriaMetrics earlier than v1.90), then `SeriesFetched=nil`.
In this case, UI will contain no additional warnings.
And `vmalert_alerting_rules_last_evaluation_series_fetched` will
be set to `-1`. Negative value of the metric will help to compile
correct alerting rule in follow-up.
Thanks for the initial implementation to @Haleygo
See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4056
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4039
Signed-off-by: hagen1778 <roman@victoriametrics.com>
75 lines
1.7 KiB
Go
75 lines
1.7 KiB
Go
package datasource
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"net/http"
|
|
"strconv"
|
|
"time"
|
|
)
|
|
|
|
type graphiteResponse []graphiteResponseTarget
|
|
|
|
type graphiteResponseTarget struct {
|
|
Target string `json:"target"`
|
|
Tags map[string]string `json:"tags"`
|
|
DataPoints [][2]float64 `json:"datapoints"`
|
|
}
|
|
|
|
func (r graphiteResponse) metrics() []Metric {
|
|
var ms []Metric
|
|
for _, res := range r {
|
|
if len(res.DataPoints) < 1 {
|
|
continue
|
|
}
|
|
var m Metric
|
|
// add only last value to the result.
|
|
last := res.DataPoints[len(res.DataPoints)-1]
|
|
m.Values = append(m.Values, last[0])
|
|
m.Timestamps = append(m.Timestamps, int64(last[1]))
|
|
for k, v := range res.Tags {
|
|
m.AddLabel(k, v)
|
|
}
|
|
ms = append(ms, m)
|
|
}
|
|
return ms
|
|
}
|
|
|
|
func parseGraphiteResponse(req *http.Request, resp *http.Response) (Result, error) {
|
|
r := &graphiteResponse{}
|
|
if err := json.NewDecoder(resp.Body).Decode(r); err != nil {
|
|
return Result{}, fmt.Errorf("error parsing graphite metrics for %s: %w", req.URL.Redacted(), err)
|
|
}
|
|
return Result{Data: r.metrics()}, nil
|
|
}
|
|
|
|
const (
|
|
graphitePath = "/render"
|
|
graphitePrefix = "/graphite"
|
|
)
|
|
|
|
func (s *VMStorage) setGraphiteReqParams(r *http.Request, query string, timestamp time.Time) {
|
|
if s.appendTypePrefix {
|
|
r.URL.Path += graphitePrefix
|
|
}
|
|
r.URL.Path += graphitePath
|
|
q := r.URL.Query()
|
|
for k, vs := range s.extraParams {
|
|
if q.Has(k) { // extraParams are prior to params in URL
|
|
q.Del(k)
|
|
}
|
|
for _, v := range vs {
|
|
q.Add(k, v)
|
|
}
|
|
}
|
|
q.Set("format", "json")
|
|
q.Set("target", query)
|
|
from := "-5min"
|
|
if s.lookBack > 0 {
|
|
lookBack := timestamp.Add(-s.lookBack)
|
|
from = strconv.FormatInt(lookBack.Unix(), 10)
|
|
}
|
|
q.Set("from", from)
|
|
q.Set("until", "now")
|
|
r.URL.RawQuery = q.Encode()
|
|
}
|