extra check on dns

netclient/local/dns.go

@@ -20,6 +20,9 @@ const DNS_UNREACHABLE_ERROR = "nameserver unreachable"
 // SetDNSWithRetry - Attempt setting dns, if it fails return true (to reset dns)
 func SetDNSWithRetry(node models.Node, address string) bool {
 	var reachable bool
+	if !hasPrereqs() {
+		return true
+	}
 	for counter := 0; !reachable && counter < 5; counter++ {
 		reachable = IsDNSReachable(address)
 		time.Sleep(time.Second << 1)
@@ -62,6 +65,14 @@ func SetDNS(nameserver string) error {
 	return err
 }
 
+func hasPrereqs() bool {
+	if !ncutils.IsLinux() {
+		return false
+	}
+	_, err := exec.LookPath("resolvectl")
+	return err == nil
+}
+
 // UpdateDNS - updates local DNS of client
 func UpdateDNS(ifacename string, network string, nameserver string) error {
 	if !ncutils.IsLinux() {