only leader master should send telemetry

weed/telemetry/collector.go

@@ -9,6 +9,8 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/topology"
 )
 
+// Collector gathers telemetry data from a SeaweedFS cluster
+// Only the leader master will send telemetry to avoid duplicates
 type Collector struct {
 	client       *Client
 	topo         *topology.Topology
@@ -45,12 +47,27 @@ func (c *Collector) SetMasterServer(masterServer interface{}) {
 	c.masterServer = masterServer
 }
 
+// isLeader checks if this master is the leader
+func (c *Collector) isLeader() bool {
+	if c.topo == nil {
+		return false
+	}
+	return c.topo.IsLeader()
+}
+
 // CollectAndSendAsync collects telemetry data and sends it asynchronously
+// Only sends telemetry if this master is the leader
 func (c *Collector) CollectAndSendAsync() {
 	if !c.client.IsEnabled() {
 		return
 	}
 
+	// Only leader master should send telemetry to avoid duplicates
+	if !c.isLeader() {
+		glog.V(2).Infof("Skipping telemetry collection - not the leader master")
+		return
+	}
+
 	go func() {
 		data := c.collectData()
 		c.client.SendTelemetryAsync(data)
@@ -69,7 +86,11 @@ func (c *Collector) StartPeriodicCollection(interval time.Duration) {
 	// Send initial telemetry after a short delay
 	go func() {
 		time.Sleep(61 * time.Second) // Wait for cluster to stabilize
-		c.CollectAndSendAsync()
+		if c.isLeader() {
+			c.CollectAndSendAsync()
+		} else {
+			glog.V(2).Infof("Skipping initial telemetry collection - not the leader master")
+		}
 	}()
 
 	// Start periodic collection
@@ -77,7 +98,12 @@ func (c *Collector) StartPeriodicCollection(interval time.Duration) {
 	go func() {
 		defer ticker.Stop()
 		for range ticker.C {
-			c.CollectAndSendAsync()
+			// Check leadership before each collection
+			if c.isLeader() {
+				c.CollectAndSendAsync()
+			} else {
+				glog.V(2).Infof("Skipping periodic telemetry collection - not the leader master")
+			}
 		}
 	}()
 }