MVP

go_exporter/deploy.yaml

@@ -5,6 +5,10 @@ metadata:
   namespace: rook-ceph
   labels:
     app: export-deploy
+  annotations:
+    prometheus.io/scrape: "true"
+    prometheus.io/port: "9040"
+    prometheus.io/path: "/metrics"
 spec:
   replicas: 1
   selector:
@@ -17,7 +21,7 @@ spec:
     spec:
       containers:
       - name: export
-        image: serviceplant/goexp:0.0.23
+        image: serviceplant/goexp:0.0.28
         ports:
           - containerPort: 9040
             name: metrics
@@ -58,6 +62,7 @@ spec:
               real_path=$(realpath ${MON_CONFIG})
               initial_time=$(stat -c %Z "${real_path}")
               while true; do
+                echo "I am watching!!!"
                 real_path=$(realpath ${MON_CONFIG})
                 latest_time=$(stat -c %Z "${real_path}")
 
@@ -86,8 +91,8 @@ spec:
             write_endpoints
 
             # continuously update the mon endpoints if they fail over
-            exec /home/exporter
-            watch_endpoints &
+            exec /home/exporter &
+            watch_endpoints 
         imagePullPolicy: IfNotPresent
         tty: true
         securityContext:
@@ -137,7 +142,7 @@ metadata:
     rook_cluster: rook-ceph
 spec:
   selector:
-    app: export
+    app: export-box
   ports:
   - name: metrics
     port: 9040

go_exporter/main.go

@@ -30,14 +30,16 @@ type RBDImageUsage struct {
 	UsedSize      uint64 `json: "used_size"`
 }
 
-var fooMetric = prometheus.NewGauge(prometheus.GaugeOpts{
-	Name: "foo_metric",
-	Help: "Show whether a foo has occured in a cluster",
-})
+var total_rbd_requested_size_per_pool = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+	Name: "total_rbd_requested_size_per_pool",
+	Help: "total size of all requested RBDs in a specific pool",
+	},
+	[]string{"poolname"},
+)
 
-var barMetric = prometheus.NewGauge(prometheus.GaugeOpts{
-	Name: "bar_metric",
-	Help: "Show whether a bar has happened in a cluster",
+var total_rbd_requested_size = prometheus.NewGauge(prometheus.GaugeOpts{
+	Name: "total_rbd_requested_size",
+	Help: "total size of all RBDs in the cluster",
 })
 
 // Here I initialize logger and set some custom settings
@@ -58,11 +60,12 @@ func init() {
 	logger = loggerInit()
 	logger.Info("Setting up logger is complete successfully")
 	logger.Info("Registering prom metrics")
-	prometheus.MustRegister(fooMetric)
-	prometheus.MustRegister(barMetric)
+	
+	prometheus.MustRegister(
+		total_rbd_requested_size_per_pool,
+		total_rbd_requested_size,
+	)
 
-	fooMetric.Set(0)
-	barMetric.Set(1)
 }
 
 // List pools with application rbd enabled
@@ -141,7 +144,7 @@ func getRBD(poolList []string) map[string][]string {
 }
 
 // Here I check total provisioned size of each RBD image in a pool
-func RbdChecker(rbdMap map[string][]string) {
+func RbdChecker(rbdMap map[string][]string) map[string][]RBDUsage{
 	total := make(map[string][]RBDUsage)
 
 	for pool, rbdlist := range rbdMap {
@@ -152,12 +155,12 @@ func RbdChecker(rbdMap map[string][]string) {
 
 		}
 	}
-	fmt.Println(total)
+	logger.Debugf("Final map is %v",total)
+	return total
 }
 
 // Grabbing info about specific image
 func GetRBDStats(pool string, rbdname string) RBDUsage {
-	logger.Infof("Calculating %s/%s", pool, rbdname)
 	rbdPath := fmt.Sprintf("%s/%s", pool, rbdname)
 	args := []string{"du", "--format", "json", rbdPath}
 
@@ -177,6 +180,32 @@ func GetRBDStats(pool string, rbdname string) RBDUsage {
 
 }
 
+func FormMetrirs(rbdStats map[string][]RBDUsage) {
+	// this is requested size overall cluster
+	var totalSize uint64 = 0
+
+	// Iterate over pools
+	for poolName := range rbdStats {
+		var totalSizePerPool uint64 = 0
+		logger.Debugf("Forming metrics for pool %s",poolName)
+		
+		//Iterate over all RBDs in the pool
+		for _,rbdName := range rbdStats[poolName] {
+			logger.Debugf("Processings rbd %v",rbdName)
+			totalSizePerPool = totalSizePerPool + rbdName.Images[0].RequestedSize	
+			// logger.Debugf("RBD name is %s and its size is %d",rbdName.Images[0].Name,rbdName.Images[0].RequestedSize)
+		}
+		logger.Debugf("Total size requested by RBDs of a pool %s is %d bytes",poolName,totalSizePerPool)
+
+		total_rbd_requested_size_per_pool.WithLabelValues(
+			poolName,
+		).Set(float64(totalSizePerPool))
+		totalSize = totalSize + totalSizePerPool
+	}	
+	logger.Debugf("Total size of all RBDs in a cluster is %d",totalSize)
+	total_rbd_requested_size.Set(float64(totalSize))
+}
+
 // the main loop for monitoting
 func startCheking() {
 
@@ -192,7 +221,10 @@ func startCheking() {
 		}
 		// Get the map of all RBDs in all pools
 		rbdMap := getRBD(poolList)
-		RbdChecker(rbdMap)
+		//Get all RBDs info
+		RBDStats := RbdChecker(rbdMap)
+		//Fill out metrics
+		FormMetrirs(RBDStats)
 	}
 
 }