How to run nfs server on boot2docker with docker-machine ?

[kakakikikeke]

I ran on macos. Detailed commands are as follows.

• sw_vers

ProductName:    Mac OS X
ProductVersion: 10.14.5
BuildVersion:   18F132

• docker-machine -v

docker-machine version 0.16.1, build cce350d7

• docker-machine create nfs
• docker-machine ls

NAME   ACTIVE   DRIVER       STATE     URL                         SWARM   DOCKER     ERRORS                                   
nfs    -        virtualbox   Running   tcp://192.168.99.100:2376           v19.03.0

• eval $(docker-machine env nfs)
• docker info | grep 'Operating'

Operating System: Boot2Docker 19.03.0 (TCL 10.1)

• docker-machine ssh nfs mkdir nfsshare
• docker-machine ssh nfs ls -l /home/docker/nfsshare

total 0

• docker run -d -p 2049:2049 --name nfs --privileged -v /home/docker/nfsshare:/nfsshare -e SHARED_DIRECTORY=/nfsshare itsthenetwork/nfs-server-alpine:latest
• docker logs nfs

Writing SHARED_DIRECTORY to /etc/exports file
The PERMITTED environment variable is unset or null, defaulting to '*'.
This means any client can mount.
The READ_ONLY environment variable is unset or null, defaulting to 'rw'.
Clients have read/write access.
The SYNC environment variable is unset or null, defaulting to 'async' mode.
Writes will not be immediately written to disk.
Displaying /etc/exports contents:
/nfsshare *(rw,fsid=0,async,no_subtree_check,no_auth_nlm,insecure,no_root_squash)

Starting rpcbind...
Displaying rpcbind status...
   program version netid     address                service    owner
    100000    4    tcp6      ::.0.111               -          superuser
    100000    3    tcp6      ::.0.111               -          superuser
    100000    4    udp6      ::.0.111               -          superuser
    100000    3    udp6      ::.0.111               -          superuser
    100000    4    tcp       0.0.0.0.0.111          -          superuser
    100000    3    tcp       0.0.0.0.0.111          -          superuser
    100000    2    tcp       0.0.0.0.0.111          -          superuser
    100000    4    udp       0.0.0.0.0.111          -          superuser
    100000    3    udp       0.0.0.0.0.111          -          superuser
    100000    2    udp       0.0.0.0.0.111          -          superuser
    100000    4    local     /var/run/rpcbind.sock  -          superuser
    100000    3    local     /var/run/rpcbind.sock  -          superuser
Starting NFS in the background...
rpc.nfsd: Unable to access /proc/fs/nfsd errno 2 (No such file or directory).
Please try, as root, 'mount -t nfsd nfsd /proc/fs/nfsd' and then restart rpc.nfsd to correct the problem
Exporting File System...
exporting *:/nfsshare
/nfsshare       <world>
Starting Mountd in the background...These
Startup successful.

The following error occurred. These did not occur on Ubuntu server.

rpc.nfsd: Unable to access /proc/fs/nfsd errno 2 (No such file or directory).
Please try, as root, 'mount -t nfsd nfsd /proc/fs/nfsd' and then restart rpc.nfsd to correct the problem

Thanks.