uebayasi/openwrt-x86_64-nfs-root.md

Last active September 29, 2020 03:46

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Mount root as NFS on OpenWrt x86_64

Raw

openwrt-x86_64-nfs-root.md

Summary

Not much info available but surely possible
Basically same as normal Linux NFS root
Except kernel configuration adjustment might be tricky

Environment

Target: OpenWrt 15.x on KVM
Host Ubuntu 16.04

Configuration

Kernel

Do make kernel_menuconfig
Save changes with git diff target/linux
Add CONFIG_KERNEL_IP_PNP=y to the global .config (not one under linux subdirectory), do make defconfig, and make V=s
- Enable CONFIG_DHCP and CONFIG_ROOT_NFS for kernel config

Host

Basic "Linux NFS root" configuration
Nothing special needed for OpenWrt
NFS root
- Root is OpenWrt's build_dir/target-x86_64_musl-1.1.14/root-x86
  - XXX Need to fix file user/group/mode?
- Edit etc/config/network and comment out config interface 'lan' (eth0)
  - eth0 is already configured for NFS root

References

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