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Table of Contents
Boot linux over NFS
The following text describes on how to use NFS for the root filesystem. For the rest of this text 'client' means the diskless system, and 'server' means the NFS server.
NFS server settings (HOST PC)
Install nfs pakages.
sudo apt-get install nfs-kernel-server nfs-common
After insert your eMMC or SD card, copy the Root File System.
# The rootfs folder is mounted your RFS by SD card. sudo cp -rp /media/$USER/rootfs /home/$USER/
Add following line in “/etc/exports”
/home/$USER/rootfs *(rw,sync,no_root_squash,no_subtree_check)
Restart NFS service.
sudo service nfs-kernel-server restart
Modify /home/$USER/rootfs/etc/network/interfaces
# This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface, commented out for NFS root #auto eth0 #iface eth0 inet dhcp iface eth0 inet manual
Kernel configuration
To use Ethernet and NFS on initramfs you need to change module to built-in.
kernel configuration
Location:
-> File systems
-> Network File Systems
<*> NFS client support
<*> NFS client support for NFS version 3
Then, Update your ODROID's kernel.
Refer to the following links How to kernel update.
NFS Client(Tartget Board) settings
How to add the boot argument
You shuled modify boot.ini file or compile to a u-boot script.
Append following line to the boot argument.
boot=nfs root=/dev/nfs ip=dhcp nfsroot=${rfspath} rw
Modify “/media/boot/boot.ini”
setenv rfspath 192.168.0.22:/home/john/rootfs
setenv bootargs "boot=nfs root=/dev/nfs ip=dhcp nfsroot=${rfspath} rw rootwait ro ${condev} no_console_suspend vdaccfg=0xa000 logo=osd1,loaded,0x7900000,720p,full dmfc=3 cvbsmode=576cvbs hdmimode=${m} m_bpp=${m_bpp} vout=${vout_mode} ${disableuhs}"
Reboot.
sudo reboot
Nice to have a lot of disk space:
root@odroid:~# df -h Filesystem Size Used Avail Use% Mounted on 192.168.0.22:/home/john/rootfs 909G 177G 687G 21% / none 4.0K 0 4.0K 0% /sys/fs/cgroup udev 420M 4.0K 420M 1% /dev tmpfs 425M 4.0K 425M 1% /tmp tmpfs 85M 2.6M 83M 3% /run none 5.0M 0 5.0M 0% /run/lock none 425M 76K 425M 1% /run/shm none 100M 24K 100M 1% /run/user /dev/mmcblk0p1 129M 7.4M 122M 6% /media/boot
