added monthly requests limit to postman api request metrics collection (#4667)

pkg/sources/postman/metrics.go

@@ -9,6 +9,7 @@ import (
 type metrics struct {
 	apiRequests                 *prometheus.CounterVec
 	apiMonthlyRequestsRemaining *prometheus.GaugeVec
+	apiMonthlyRequestsLimit     *prometheus.GaugeVec
 }
 
 var (
@@ -27,6 +28,14 @@ var (
 		Help:      "Total number of Postman API requests remaining this month.",
 	},
 		[]string{"source_name"})
+
+	postmanAPIMonthlyRequestsLimit = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: common.MetricsNamespace,
+		Subsystem: common.MetricsSubsystem,
+		Name:      "postman_api_monthly_requests_limit",
+		Help:      "Total monthly Postman API request limit.",
+	},
+		[]string{"source_name"})
 )
 
 func newMetrics(sourceName string) *metrics {
@@ -37,5 +46,8 @@ func newMetrics(sourceName string) *metrics {
 		apiMonthlyRequestsRemaining: postmanAPIMonthlyRequestsRemaining.MustCurryWith(map[string]string{
 			"source_name": sourceName,
 		}),
+		apiMonthlyRequestsLimit: postmanAPIMonthlyRequestsLimit.MustCurryWith(map[string]string{
+			"source_name": sourceName,
+		}),
 	}
 }

pkg/sources/postman/postman_client.go

@@ -345,6 +345,10 @@ func (c *Client) handleRateLimits(ctx trContext.Context, resp *http.Response) er
 		return nil
 	}
 
+	c.Metrics.apiMonthlyRequestsLimit.WithLabelValues().Set(
+		float64(rateLimitTotalMonth),
+	)
+
 	if rateLimitTotalMonth == 0 {
 		ctx.Logger().V(2).Info("RateLimit-Limit-Month is zero, cannot compute usage percentage")
 		return nil