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Function-based metrics for CE

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OpenFaaS CE exposes metrics about function invocations and
about the gateway itself. OpenFaaS Pro has a richer set of
metrics including HTTP RED.

See also: https://docs.openfaas.com/architecture/metrics/

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
This commit is contained in:
Alex Ellis (OpenFaaS Ltd)
2023-01-28 09:10:48 +00:00
parent c26ec5221e
commit a128df471f
4 changed files with 2 additions and 52 deletions
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14
gateway/handlers/notifiers.go
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@ -17,20 +17,6 @@ type HTTPNotifier interface {
Notify(method string, URL string, originalURL string, statusCode int, event string, duration time.Duration)
}
// PrometheusServiceNotifier notifier for core service endpoints
type PrometheusServiceNotifier struct {
ServiceMetrics *metrics.ServiceMetricOptions
}
// Notify about service metrics
func (psn PrometheusServiceNotifier) Notify(method string, URL string, originalURL string, statusCode int, event string, duration time.Duration) {
code := fmt.Sprintf("%d", statusCode)
path := urlToLabel(URL)
psn.ServiceMetrics.Counter.WithLabelValues(method, path, code).Inc()
psn.ServiceMetrics.Histogram.WithLabelValues(method, path, code).Observe(duration.Seconds())
}
func urlToLabel(path string) string {
if len(path) > 0 {
path = strings.TrimRight(path, "/")