diff --git a/install-swarm.sh b/install-swarm.sh
index a55afa8..28ac4fb 100644
--- a/install-swarm.sh
+++ b/install-swarm.sh
@@ -9,9 +9,19 @@ currentTime()
   date +"%Y-%m-%d %H:%M:%S";
 }
 
+echo ---$(currentTime)---setup overlay network---
+sudo docker network create \
+--driver overlay \
+--subnet $HOST_INTERNAL_SUBNET \
+--gateway $HOST_INTERNAL_IP \
+--attachable \
+devops_network
+
 echo ---$(currentTime)---initiate swarm---
 sudo docker swarm init --advertise-addr $LEAD_HOST_IP
 
+
+
 sudo docker swarm join-token manager
 #其他manager节点加入，用sudo docker swarm join-token manager来获取加入集群的命令