I am trying to run following: 
start a container in background
 docker run -dit -p 8090:80 --name container repository:dockerfile bash 
I want to exclude sub directory /data from /test 
 docker cp /Users/$USER/test container:/test 
I thought of using rsync for this
docker exec rsync -avP  --exclude /Users/$USER/test/data /Users/$USER/test/ container:/test/
 I get below error: rsync: Failed to exec ssh: No such file or directory (2)
rsync error: error in IPC code (code 14) at pipe.c(85) [sender=3.1.0]
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(226)
[sender=3.1.0]
 How do I rsync from host to container?