simplify metric emission

Signed-off-by: Arvind Thirumurugan <[email protected]>

Author: Arvind Thirumurugan

cmd/metric-app/main.go

@@ -2,35 +2,22 @@ package main
 
 import (
 	"net/http"
-	"os"
 
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
 
 func main() {
-	// Get cluster and workload information from environment variables
-	clusterName := os.Getenv("CLUSTER_NAME")
-	if clusterName == "" {
-		clusterName = "unknown"
-	}
-
-	workloadName := os.Getenv("WORKLOAD_NAME")
-	if workloadName == "" {
-		workloadName = "unknown"
-	}
-
 	// Define a simple gauge metric for health with labels
-	workloadHealth := prometheus.NewGaugeVec(
+	workloadHealth := prometheus.NewGauge(
 		prometheus.GaugeOpts{
 			Name: "workload_health",
 			Help: "Indicates if the workload is healthy (1=healthy, 0=unhealthy)",
 		},
-		[]string{"cluster_name", "workload_name"},
 	)
 
 	// Set it to 1 (healthy) with labels
-	workloadHealth.WithLabelValues(clusterName, workloadName).Set(1)
+	workloadHealth.Set(1)
 
 	// Register metric with Prometheus default registry
 	prometheus.MustRegister(workloadHealth)

examples/fleet_v1beta1_membercluster.yaml

@@ -1,10 +1,10 @@
 apiVersion: cluster.kubernetes-fleet.io/v1beta1
 kind: MemberCluster
 metadata:
-  name: kind-cluster-1
+  name: kind-cluster-3
 spec:
   identity:
-    name: fleet-member-agent-cluster-1
+    name: fleet-member-agent-cluster-3
     kind: ServiceAccount
     namespace: fleet-system
     apiGroup: ""

examples/sample-metric-app-ro.yaml

@@ -21,12 +21,7 @@ spec:
     spec:
       containers:
       - name: metric-app
-        image: ghcr.io/metric-app:6d6cd69
+        image: metric-app:local
         imagePullPolicy: IfNotPresent
         ports:
         - containerPort: 8080
-        env:
-        - name: CLUSTER_NAME
-          value: "cluster-1"
-        - name: WORKLOAD_NAME
-          value: "sample-metric-app"