Convoy access denied by server while mounting to NFS server

[wxj19880511]

Hi,

• I am trying Convoy in rancher according to this online documentation( http://rancher.com/setting-shared-volumes-convoy-nfs/,) but always failed , the nfs server side give me the below information,
  could any one give me some hint ?
• My nfs server side docker-compose yml as below =>

docker-nfs:
image: osp-docker-hub.dynamic.nsn-net.net:5000/docker-nfs-server:0.3
privileged: true
volumes:
/exports
command:
/exports

• Convoy error message =>

2016/10/22 下午11:01:56time="2016-10-22T15:01:56Z" level=info msg="Execing [/usr/bin/nsenter --mount=/proc/18094/ns/mnt -F -- /var/lib/docker/aufs/mnt/e9a1193396e0cf33197244928926731b7f4e7f7dc8a488ca67696bd44e24ad6b/var/lib/rancher/convoy-agent/share-mnt --stage2 /var/lib/rancher/convoy/convoy-nfs-41f5b22b-4f00-4a66-bd15-cbab7ae2c4ec -- /launch volume-agent-nfs-internal 18094]"
2016/10/22 下午11:01:57Registering convoy socket at /var/run/convoy-convoy-nfs.sock
2016/10/22 下午11:01:57Mounting at: /var/lib/rancher/convoy/convoy-nfs-41f5b22b-4f00-4a66-bd15-cbab7ae2c4ec/mnt
2016/10/22 下午11:01:57Mounting nfs. Command: mount -t nfs -o proto=tcp,port=2049,nfsvers=4 10.157.2.41:/ /var/lib/rancher/convoy/convoy-nfs-41f5b22b-4f00-4a66-bd15-cbab7ae2c4ec/mnt
2016/10/22 下午11:01:57mount.nfs: access denied by server while mounting 10.254.9.41:/