How to setup nfs-kernel-server?

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Working 29.2.2020.

install kernel nfs server

opkg install nfs-kernel-server

modify exports file /opt/etc/exports (not sure how secure this is)

/media *(rw,no_root_squash,insecure,no_subtree_check,fsid=0,crossmnt)

modify start script /opt/etc/init.d/S57nfs-kernel-server (just some small modifications)

remove this 4 lines checking for portmap

if [ -z "`pidof portmap`" ] ; then
        echo 'Error: portmap not started'
        exit 1
fi

remove --no-tcp, add --udp and increase number of threads from 1 to 8

    rpc.nfsd --no-nfs-version 4 --udp 8
    rpc.mountd --no-nfs-version 4

start nfs server

/opt/etc/init.d/S57nfs-kernel-server start

mount share (only for test)

mkdir /storage/test_nfs_mount
mount -t nfs THIS_DEVICE_IP:/media /storage/test_nfs_mount
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