marcomezzaro / synok3s

k3s on synology dsm

Synok3s

K3S on Synology ds218

Based on: https://medium.com/@marco.mezzaro/k3s-on-synology-what-if-it-works-e980b4b09fcb

Compile missing kernel modules

download from sourceforge kernel source and dsm toolchain (my ds218 has rtd129x)

• https://sourceforge.net/projects/dsgpl/files/Synology%20NAS%20GPL%20Source/22259branch/rtd1296-source/
• https://sourceforge.net/projects/dsgpl/files/DSM%206.2.2%20Tool%20Chains/Realtek%20RTD129x%20Linux%204.4.59/

from a brand new debian system: create a folder:

sudo apt update
sudo apt install wget 
mkdir -p ~/dsm/archives 
cd ~/dsm

put:

• rtd1296-gcc494_glibc220_armv8-GPL.txz
• linux-4.4.x.txz

install all build deps:

sudo apt-get install mc make gcc build-essential kernel-wedge libncurses5 libncurses5-dev libelf-dev binutils-dev kexec-tools makedumpfile fakeroot lzma bc libssl-dev

extract and move txz archives away:

tar Jxvf linux-4.4.x.txz 
tar Jxvf rtd1296-gcc494_glibc220_armv8-GPL.txz 
mv linux-4.4.x.txz rtd1296-gcc494_glibc220_armv8-GPL.txz archives/

enter in kernel source folder and copy kernel config in place

cd linux-4.4.x/
cp synoconfigs/rtd1296 .config

export magic number version (if not exported could cause headaches!) and alias for dsm make

export LOCALVERSION=+1
alias dsm6make='make ARCH=arm64 CROSS_COMPILE=~/dsm/aarch64-unknown-linux-gnueabi/bin/aarch64-unknown-linux-gnueabi-'

config the kernel, select all modules for iptables and make modules:

dsm6make menuconfig
dsm6make modules
find . -iname "*.ko" -type f

copy the kernel modules in /lib/modules on synology machine. DO NOT OVERWRITE already present modules. use insmod command to load. for troubleshooting check dmesg for errors.

Links

• http://billauer.co.il/blog/2013/10/version-magic-insmod-modprobe-force/
• https://stackoverflow.com/questions/9341701/cross-compiling-a-kernel-module-invalid-module-format

synok3s's Issues

ipt_REJECT : Unknown symbol nf_send_unreach & nf_send_reset

Hello,

I got my linux-4.4.x.txz here :

https://global.download.synology.com/download/ToolChain/Synology%20NAS%20GPL%20Source/7.0-41890/geminilake/linux-4.4.x.txz

I built ipt_REJECT.ko and xt_comment.ko.

I managed to add the xt_comment.ko into my kernel without any errors.

But when I try with ipt_REJECT.ko, I get this error :

insmod: ERROR: could not insert module /lib/modules/ipt_REJECT.ko: Unknown symbol in module

when I look at dmesg, I see those lines

ipt_REJECT: Unknown symbol nf_send_reset (err 0)
ipt_REJECT: Unknown symbol nf_send_unreach (err 0)

Those functions are indeed used in ipt_REJECT.c, is there any way to make this work?

I am on DSM 7.1.1-42962 Update 1.

Yoplait@LeNAS:~$ uname -a
Linux nas_name 4.4.180+ #42962 SMP Tue Sep 20 22:35:56 CST 2022 x86_64 GNU/Linux synology_geminilake_920+