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lib/promscrape: expose promscrape_discovery_http_errors_total metric for tracking errors per each http_sd config

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This commit is contained in:
Aliaksandr Valialkin 2021-08-25 13:02:52 +03:00
parent b885bd9b7d
commit 4a2d7aec7f
2 changed files with 16 additions and 3 deletions
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1
docs/CHANGELOG.md
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@ -10,6 +10,7 @@ sort: 15
* FEATURE: take into account failed queries in `vm_request_duration_seconds` summary at `/metrics`. Previously only successful queries were taken into account. This could result in skewed summary. See [this pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1537).
* FEATURE: vmalert: add `-disableAlertgroupLabel` command-line flag for disabling the label with alert group name. This may be needed for proper deduplication in Alertmanager. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1532).
* FEATURE: update Go builder from v1.16.7 to v1.17.0. This improves data ingestion and query performance by up to 5% according to benchmarks. See [the release post for Go1.17](https://go.dev/blog/go1.17).
* FEATURE: vmagent: expose `promscrape_discovery_http_errors_total` metric, which can be used for monitoring the number of failed discovery attempts per each `http_sd` config.
* BUGFIX: rename `sign` function to `sgn` in order to be consistent with PromQL. See [this pull request from Prometheus](https://github.com/prometheus/prometheus/pull/8457).
* BUGFIX: improve the detection of the needed free space for background merge operation. This should prevent from possible out of disk space crashes during big merges. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1560).

18
lib/promscrape/discovery/http/api.go
View File

@ -8,6 +8,7 @@ import (
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape/discoveryutils"
"github.com/VictoriaMetrics/fasthttp"
"github.com/VictoriaMetrics/metrics"
)
var configMap = discoveryutils.NewConfigMap()
@ -15,6 +16,9 @@ var configMap = discoveryutils.NewConfigMap()
type apiConfig struct {
client *discoveryutils.Client
path string
fetchErrors *metrics.Counter
parseErrors *metrics.Counter
}
// httpGroupTarget respresent prometheus GroupTarget
@ -44,8 +48,10 @@ func newAPIConfig(sdc *SDConfig, baseDir string) (*apiConfig, error) {
return nil, fmt.Errorf("cannot create HTTP client for %q: %w", apiServer, err)
}
cfg := &apiConfig{
client: client,
path: parsedURL.RequestURI(),
client: client,
path: parsedURL.RequestURI(),
fetchErrors: metrics.GetOrCreateCounter(fmt.Sprintf(`promscrape_discovery_http_errors_total{type="fetch",url=%q}`, sdc.URL)),
parseErrors: metrics.GetOrCreateCounter(fmt.Sprintf(`promscrape_discovery_http_errors_total{type="parse",url=%q}`, sdc.URL)),
}
return cfg, nil
}
@ -64,9 +70,15 @@ func getHTTPTargets(cfg *apiConfig) ([]httpGroupTarget, error) {
request.Header.Set("Accept", "application/json")
})
if err != nil {
cfg.fetchErrors.Inc()
return nil, fmt.Errorf("cannot read http_sd api response: %w", err)
}
return parseAPIResponse(data, cfg.path)
tg, err := parseAPIResponse(data, cfg.path)
if err != nil {
cfg.parseErrors.Inc()
return nil, err
}
return tg, nil
}
func parseAPIResponse(data []byte, path string) ([]httpGroupTarget, error) {