Snappy Ubuntu Core
This repository contains every needed to build your own Snappy Ubuntu Core OS image for Boundary Devices Nitrogen platforms.
Build requirements
First of all, it is highly recommended to build from Ubuntu 16.04 or later. Although there are solutions for different OS flavours, some tools are limited to Ubuntu for now.
Then you need to install the following packages in order to build Ubuntu Core.
~$ sudo apt update
~$ sudo apt install -y build-essential u-boot-tools lzop snapd \
gcc-arm-linux-gnueabihf gcc-aarch64-linux-gnu
~$ sudo snap install snapcraft --classic
~$ sudo snap install ubuntu-image --classic
You can check that the snap is working on your host machine by listing the available packages:
~$ snap list
Name Version Rev Tracking Publisher Notes
core 16-2.48 10577 latest/stable canonical✓ core
core18 20201210 1944 latest/stable canonical✓ base
core20 20201210 904 latest/stable canonical✓ base
snapcraft 4.4.4 5821 latest/stable canonical✓ classic
ubuntu-image 1.10+snap1 187 latest/stable canonical✓ classic
Build procedure
Getting the source code
Simply clone this repository:
~$ git clone https://github.com/boundarydevices/ubuntu-core.git
~$ cd ubuntu-core
Gadget build
If you just wish to build the gadget:
~/ubuntu-core$ make gadget
Kernel build
If you don't build from a Focal 20.04 OS, we recommend using LXD:
~$ sudo snap install lxd
~$ sudo lxd init --auto
~$ sudo lxc launch ubuntu:20.04 focal
~$ sudo lxc shell focal
Then you can simply build the kernelsnap:
~/ubuntu-core$ make kernelsnap
Image generation
If you re-built the kernel or the gadget manually, you can simply generate the image:
~/ubuntu-core$ make snappy
Flashing instructions
The output file should be named ubuntu-coreXX-<arch>-nitrogen-yyyymmdd.img.gz.
You can then simply flash it using zcat and dd.
~/ubuntu-core$ zcat ubuntu-core*.img.gz | sudo dd of=/dev/sdX bs=1M oflag=sync