Setup NFS-Root-Filesystem

From t-hack.com - Hack X300T / X301T

Contents 1 setup nfs server 2 populate nfsroot 3 kernel cmd-line parameter 4 boot kernel and (hopefully) Linux

setup nfs server

• install nfs server

e.g. in debian based distributions that should do the trick:

apt-get install nfs-kernel-server

• setup exports (e.g. edit /etc/exports)

/some/dir/nfsroot 192.168.1.*(rw,sync,subtree_check,no_root_squash)

• reconfigure nfsd

exportfs -a

populate nfsroot

• cd into the desired directory
• create nfsroot-direcotory and download nfsroot-tarball from here
• extract it with tar xjvf nfsroot_x300t_20080214.tar.bz2

NOTE: you have to be root to do this and the files are directly inside the tarball, so there is no extra dir

kernel cmd-line parameter

• use the "Compiled-in Kernel Boot Parameter" if you are lazy

or

• start yamon
• change kernel cmd line parameter, we need ip kernel configuration!!

setxenv a.linux_cmd "console=ttyS0 root=/dev/nfs rw nfsroot=(nfs_server_ip):/some/dir/nfsroot ip=(my_ip_addr):(server_ip_addr):(gateway):(netmask):(hostname)"

• ok, here is an example without placeholders:

x300t_ip: 192.168.1.20
nfs_server_ip: 192.168.1.30
gateway: 192.168.1.1
netmask: 255.255.255.0

setxenv a.linux_cmd "console=ttyS0 root=/dev/nfs rw nfsroot=192.168.1.30:/some/dir/nfsroot ip=192.168.1.20:192.168.1.30:192.168.1.1:255.255.255.0:x300t"

boot kernel and (hopefully) Linux

ok, the above settings should let the box mount a rootfs via nfs!