如何更改docker中装载卷的传播

"Mounts": [ { "Source": "/home/ec2-user/selenium-downloads", "Destination": "/home/seluser/Downloads", "Mode": "", "RW": true, "Propagation": "rprivate" } ], 

我怎样才能改变传播？ 我需要它是空的，以便我的docker容器可以正确的挂载目录。