ce-linux

Build environment for CE Linux & script for using Mender API

Building and running the Docker image

To build the docker image, run:

docker build -t yoctobuild:v1 .

To run it as a container:

docker run -it yoctobuild:v1

Setting the Yocto environment

Build can be started either from the Docker container (see above), or on a Linux distribution supported by the Yocto Project (see system requirements)

The instructions bellow are meant to be executed inside the Docker container.

mkdir ce-linux
cd ce-linux

Make sure git user settings are set before starting:

 git config --global user.name ""
 git config --global user.email ""

Initialize & sync repo

repo init -u https://github.com/janaperic/ce-linux.git -b main
repo sync

Bitbake settings

export TEMPLATECONF=${PWD}/layers/meta-ce/conf
. layers/poky/oe-init-build-env
cp ../layers/meta-ce/conf/local.conf.sample conf/local.conf
cp ../layers/meta-ce/conf/bblayers.conf.sample conf/bblayers.conf

Build the image

bitbake ce-linux-image

Flash image to SD card

Image will be stored in build/tmp/deploy/images/raspberrypi4-64/(image-name).sdimg Flash it with bmaptool:

sudo bmaptool copy build/tmp/deploy/images/raspberrypi4-64/(image-name).sdimg /dev/mmcblk0

Bmaptool can be installed via the command (Ubuntu):

sudo apt install -y bmap-tools

Alert: Flashing from the inside of the Docker container could be not possible, in that case, copy the image outside the container and flash it from the host.

Task: Write a script using the Mender API

Bash script get-device-attr.sh can be used for gathering inventory information about the device from Mender server.

Usage:

./get-device-attr.sh (attribute)

Make sure script is executable. To make it executable, run:

chmod +x get-device-attr.sh