diff --git a/component/npu-exporter/collector/container/utils.go b/component/npu-exporter/collector/container/utils.go
index 3fc5b62c0874ab4d7199db7605f1362b8c549268..daa7742422d6a6a0ca6d81f7075374b80612d17f 100644
--- a/component/npu-exporter/collector/container/utils.go
+++ b/component/npu-exporter/collector/container/utils.go
@@ -38,9 +38,9 @@ const (
 	// MaxLenDNS configName max len
 	MaxLenDNS = 63
 	// MinLenDNS configName min len
-	MinLenDNS = 2
+	MinLenDNS = 1
 	// DNSReWithDot DNS regex string
-	DNSReWithDot  = `^[a-z0-9]+[a-z0-9-.]*[a-z0-9]+$`
+	DNSReWithDot  = `^[a-z0-9]+(?:[a-z0-9-.]*[a-z0-9]+|)$`
 	maxContainers = 1024
 	maxCgroupPath = 2048