internal/prometheus: add tenant to http and status metrics

internal/prometheus/http_metrics.go

@@ -30,5 +30,5 @@ var (
 		Subsystem: ComposerSubsystem,
 		Help:      "Duration of HTTP requests.",
 		Buckets:   []float64{.025, .05, .075, .1, .2, .5, .75, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 20},
-	}, []string{"path"})
+	}, []string{"path", "tenant"})
 )

internal/prometheus/middleware.go

@@ -7,6 +7,8 @@ import (
 
 	"github.com/labstack/echo/v4"
 	"github.com/prometheus/client_golang/prometheus"
+
+	"github.com/osbuild/osbuild-composer/internal/auth"
 )
 
 func MetricsMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
@@ -15,7 +17,10 @@ func MetricsMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
 		if strings.HasSuffix(ctx.Path(), "/compose") {
 			ComposeRequests.Inc()
 		}
-		timer := prometheus.NewTimer(httpDuration.WithLabelValues(ctx.Path()))
+
+		// leave tenant empty in case it's not in the context
+		tenant, _ := ctx.Get(auth.TenantCtxKey).(string)
+		timer := prometheus.NewTimer(httpDuration.WithLabelValues(ctx.Path(), tenant))
 		defer timer.ObserveDuration()
 		return next(ctx)
 	}
@@ -35,6 +40,8 @@ func StatusMiddleware(subsystem string) func(next echo.HandlerFunc) echo.Handler
 			path := pathLabel(ctx.Path())
 			method := ctx.Request().Method
 			status := ctx.Response().Status
+			// leave tenant empty in case it's not in the context
+			tenant, _ := ctx.Get(auth.TenantCtxKey).(string)
 
 			httpErr := new(echo.HTTPError)
 			if errors.As(err, &httpErr) {
@@ -46,6 +53,7 @@ func StatusMiddleware(subsystem string) func(next echo.HandlerFunc) echo.Handler
 				path,
 				strconv.Itoa(status),
 				subsystem,
+				tenant,
 			).Inc()
 
 			return err

internal/prometheus/status_metrics.go

@@ -14,7 +14,7 @@ func StatusRequestsCounter(subsystem string) *prometheus.CounterVec {
 		Namespace: Namespace,
 		Subsystem: subsystem,
 		Help:      "total number of http requests",
-	}, []string{"method", "path", "code", "subsystem"})
+	}, []string{"method", "path", "code", "subsystem", "tenant"})
 
 	err := prometheus.Register(counter)
 	if err != nil {