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Report non-fatal collection errors in the exporter metric. (#1439)

Browse source 
As per prometheus/client_golang#543, pass the Registry for exporter
metrics when setting up the /metrics HTTP handler.

With this, the `promhttp_metric_handler_errors_total` metric will
increment on (possibly non-fatal) collection-time errors, such as
duplicate metrics from text files.

Signed-off-by: Matthias Rampke <mr@soundcloud.com>
This commit is contained in:
Matthias Rampke 2019-07-28 10:37:10 +02:00 committed by Ben Kochie
parent d2be72be4a
commit b133213c7a
3 changed files with 9 additions and 0 deletions
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4
collector/fixtures/e2e-64k-page-output.txt
View file

@ -3539,6 +3539,10 @@ node_zfs_zpool_wupdate{zpool="poolz1"} 1.10734831833266e+14
# TYPE process_virtual_memory_bytes gauge
# HELP process_virtual_memory_max_bytes Maximum amount of virtual memory available in bytes.
# TYPE process_virtual_memory_max_bytes gauge
# HELP promhttp_metric_handler_errors_total Total number of internal errors encountered by the promhttp metric handler.
# TYPE promhttp_metric_handler_errors_total counter
promhttp_metric_handler_errors_total{cause="encoding"} 0
promhttp_metric_handler_errors_total{cause="gathering"} 0
# HELP promhttp_metric_handler_requests_in_flight Current number of scrapes being served.
# TYPE promhttp_metric_handler_requests_in_flight gauge
promhttp_metric_handler_requests_in_flight 1

4
collector/fixtures/e2e-output.txt
View file

@ -3539,6 +3539,10 @@ node_zfs_zpool_wupdate{zpool="poolz1"} 1.10734831833266e+14
# TYPE process_virtual_memory_bytes gauge
# HELP process_virtual_memory_max_bytes Maximum amount of virtual memory available in bytes.
# TYPE process_virtual_memory_max_bytes gauge
# HELP promhttp_metric_handler_errors_total Total number of internal errors encountered by the promhttp metric handler.
# TYPE promhttp_metric_handler_errors_total counter
promhttp_metric_handler_errors_total{cause="encoding"} 0
promhttp_metric_handler_errors_total{cause="gathering"} 0
# HELP promhttp_metric_handler_requests_in_flight Current number of scrapes being served.
# TYPE promhttp_metric_handler_requests_in_flight gauge
promhttp_metric_handler_requests_in_flight 1

1
node_exporter.go
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@ -116,6 +116,7 @@ func (h *handler) innerHandler(filters ...string) (http.Handler, error) {
ErrorLog: log.NewErrorLogger(),
ErrorHandling: promhttp.ContinueOnError,
MaxRequestsInFlight: h.maxRequests,
Registry: h.exporterMetricsRegistry,
},
)
if h.includeExporterMetrics {