Added reset before collecting new metrics to prevent dangling metrics

metrics/pve_node_virtual_machine_collector.go

@@ -228,6 +228,24 @@ func (c *PveVirtualMachineCollector) CollectMetrics() error {
 		return err
 	}
 
+	c.state.Reset()
+	c.cpu.Reset()
+	c.memBytes.Reset()
+	c.diskMax.Reset()
+	c.uptime.Reset()
+	c.cpuUsage.Reset()
+	c.memBytesUsed.Reset()
+	c.netReceive.Reset()
+	c.netTransmit.Reset()
+	c.diskReadOps.Reset()
+	c.diskWriteOps.Reset()
+	c.diskReadBytes.Reset()
+	c.diskWriteBytes.Reset()
+	c.diskFailedReadOps.Reset()
+	c.diskFailedWriteOps.Reset()
+	c.diskReadTimeNs.Reset()
+	c.diskWriteTimeNs.Reset()
+
 	for _, node := range cluster.NodeStatuses {
 		qemus, err := c.apiClient.GetNodeQemuList(node.Name)
 		if err != nil {