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push.go: expose metrics_push_* metrics related to metrics push process

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Updates https://github.com/VictoriaMetrics/metrics/issues/35
This commit is contained in:
Aliaksandr Valialkin 2022-08-04 18:12:13 +03:00
parent fe970f4df0
commit e9b4bb1534
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GPG Key ID: A72BEC6CD3D0DED1
2 changed files with 22 additions and 1 deletions
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1
metrics.go
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@ -99,6 +99,7 @@ func WritePrometheus(w io.Writer, exposeProcessMetrics bool) {
func WriteProcessMetrics(w io.Writer) {
writeGoMetrics(w)
writeProcessMetrics(w)
writePushMetrics(w)
}
// WriteFDMetrics writes `process_max_fds` and `process_open_fds` metrics to w.

22
push.go
View File

@ -112,6 +112,12 @@ func InitPushExt(pushURL string, interval time.Duration, extraLabels string, wri
c := &http.Client{
Timeout: interval,
}
pushesTotal := pushMetrics.GetOrCreateCounter(fmt.Sprintf(`metrics_push_total{url=%q}`, pushURLRedacted))
pushErrorsTotal := pushMetrics.GetOrCreateCounter(fmt.Sprintf(`metrics_push_errors_total{url=%q}`, pushURLRedacted))
bytesPushedTotal := pushMetrics.GetOrCreateCounter(fmt.Sprintf(`metrics_push_bytes_pushed_total{url=%q}`, pushURLRedacted))
pushDuration := pushMetrics.GetOrCreateHistogram(fmt.Sprintf(`metrics_push_duration_seconds{url=%q}`, pushURLRedacted))
pushBlockSize := pushMetrics.GetOrCreateHistogram(fmt.Sprintf(`metrics_push_block_size_bytes{url=%q}`, pushURLRedacted))
pushMetrics.GetOrCreateFloatCounter(fmt.Sprintf(`metrics_push_interval_seconds{url=%q}`, pushURLRedacted)).Set(interval.Seconds())
go func() {
ticker := time.NewTicker(interval)
var bb bytes.Buffer
@ -136,15 +142,22 @@ func InitPushExt(pushURL string, interval time.Duration, extraLabels string, wri
if err := zw.Close(); err != nil {
panic(fmt.Errorf("BUG: cannot flush metrics to gzip writer: %s", err))
}
pushesTotal.Inc()
blockLen := bb.Len()
bytesPushedTotal.Add(blockLen)
pushBlockSize.Update(float64(blockLen))
req, err := http.NewRequest("GET", pushURL, &bb)
if err != nil {
log.Printf("ERROR: metrics.push: cannot initialize request for metrics push to %q: %s", pushURLRedacted, err)
panic(fmt.Errorf("BUG: metrics.push: cannot initialize request for metrics push to %q: %w", pushURLRedacted, err))
}
req.Header.Set("Content-Type", "text/plain")
req.Header.Set("Content-Encoding", "gzip")
startTime := time.Now()
resp, err := c.Do(req)
pushDuration.UpdateDuration(startTime)
if err != nil {
log.Printf("ERROR: metrics.push: cannot push metrics to %q: %s", pushURLRedacted, err)
pushErrorsTotal.Inc()
continue
}
if resp.StatusCode/100 != 2 {
@ -152,6 +165,7 @@ func InitPushExt(pushURL string, interval time.Duration, extraLabels string, wri
_ = resp.Body.Close()
log.Printf("ERROR: metrics.push: unexpected status code in response from %q: %d; expecting 2xx; response body: %q",
pushURLRedacted, resp.StatusCode, body)
pushErrorsTotal.Inc()
continue
}
_ = resp.Body.Close()
@ -160,6 +174,12 @@ func InitPushExt(pushURL string, interval time.Duration, extraLabels string, wri
return nil
}
var pushMetrics = NewSet()
func writePushMetrics(w io.Writer) {
pushMetrics.WritePrometheus(w)
}
func addExtraLabels(dst, src []byte, extraLabels string) []byte {
for len(src) > 0 {
var line []byte