centos - Mounting nfs shares inside docker container

Question

Does anyone know how to mount nfs share inside docker container with centos base image? I've tried this command:

mount server:/dir /mount/point

and got the next error:

mount.nfs: rpc.statd is not running but is required for remote locking.
mount.nfs: Either use '-o nolock' to keep locks local, or start statd.
mount.nfs: an incorrect mount option was specified

when I try to use it with -o nolock option, the error is:

mount.nfs: Operation not permitted

Answer 1

Starting from docker 17.06, you can mount NFS shares to the container directly when you run it, without the need of extra capabilities

export NFS_VOL_NAME=mynfs
export NFS_LOCAL_MNT=/mnt/mynfs
export NFS_SERVER=my.nfs.server.com
export NFS_SHARE=/my/server/path
export NFS_OPTS=vers=4,soft

docker run --mount 
  "src=$NFS_VOL_NAME,dst=$NFS_LOCAL_MNT,volume-opt=device=:$NFS_SHARE,"volume-opt=o=addr=$NFS_SERVER,$NFS_OPTS",type=volume,volume-driver=local,volume-opt=type=nfs" 
  busybox ls $NFS_LOCAL_MNT

Alternatively, you can create the volume before the container:

docker volume create 
  --driver local 
  --opt type=nfs 
  --opt o=addr=$NFS_SERVER,$NFS_OPTS 
  --opt device=:$NFS_SHARE 
  $NFS_VOL_NAME

docker run --rm -v $NFS_VOL_NAME:$NFS_LOCAL_MNT busybox ls $NFS_LOCAL_MNT

• Got the hint from https://github.com/moby/moby/issues/28809
• official docs from docker: https://docs.docker.com/storage/volumes/#create-a-service-which-creates-an-nfs-volume