diff --git a/playbook/roles/observability-server/files/setup-observable-server.sh b/playbook/roles/observability-server/files/setup-observable-server.sh
index 848ebe09..d5abdb31 100644
--- a/playbook/roles/observability-server/files/setup-observable-server.sh
+++ b/playbook/roles/observability-server/files/setup-observable-server.sh
@@ -5,7 +5,8 @@ export secret=$2
 export namespace=$3
 export mysql_db_password=$4
 
-kubectl label nodes k3s-server prometheus=true --overwrite
+node_name=`kubectl get nodes | awk '{print $1}' | tail -n 1`
+kubectl label nodes $node_name prometheus=true --overwrite
 
 cat > values.yaml << EOF
 deepflow: