How to integrate Azure IoT Edge on OpenSTLinux

1. Article purpose

The purpose of this article is to explain how to integrate the Microsoft Azure IoT Edge device on OpenSTLinux.

This article explains step by step how to add the Yocto meta-data components needed on OpenSTLinux distribution, and how to configure and build the image.

2. Prerequisites

You need to have an active Azure subscription, a "Free Trail" subscription is possible for 12 months. The way to do that is described in the Linux Quickstart document.

2.1. Hardware prerequisites

• STM32MP157C-DK2

STM32MP157C-DK2

For more information about the STM32 discovery board and how to start it up, jump to this section Getting_started/STM32MP1_boards/STM32MP157C-DK2.

2.2. Software prerequisites

The STM32MP1 Distribution Package must be installed on your host. The process has been verified with the delivery ecosystem release v1.2.0 . For more information about the OpenSTLinux distribution package go to STM32MP1_Distribution_Package article.

Note that the software customizations have been applied on a (DISTRO: openstlinux-weston, MACHINE: stm32mp1) OpenSTLinux distribution environment, and for a st-image-weston image.

3. Software update with Yoto meta-iotedge and the dependencies

Information

The configuration tested is based on : meta-iotedge : branch dunfell  : commit 6840cf2afb51b4f2c535a05d5635736652f664f7 meta-virtualization : branch dunfell  : commit 502b81ae3ae11bf4d889b7eff6239fb9e6c55994 meta-rust : branch master : commit e4d25b98083bcecb94df6ee189a165d63ede7f3d

1.Get meta-iotedge and the dependencies

cd  [your STM32MP1 Distribution path]/layers/
git clone -b dunfell https://github.com/Azure/meta-iotedge.git
git clone git://github.com/meta-rust/meta-rust.git
git clone -b dunfell git://git.yoctoproject.org/meta-virtualization
cd meta-rust
git checkout e4d25b98083bcecb94df6ee189a165d63ede7f3d -b INT_AZURE

2.Setup the build configuration

cd [your STM32MP1 Distribution path]
DISTRO=openstlinux-weston MACHINE=stm32mp1 source layers/meta-st/scripts/envsetup.sh

3.Add the meta-iotedge layer and other dependencies yocto layers to the distribution configuration.

cd [your STM32MP1 Distribution path]
bitbake-layers add-layer [your STM32MP1 Distribution path]/meta-rust/
bitbake-layers add-layer [your STM32MP1 Distribution path]/meta-virtualization/
bitbake-layers add-layer [your STM32MP1 Distribution path]/meta-iotedge/

4.Update the configuration to add the new components in your image.

• Add DISTRO_FEATURES_append = "virtualization" into [your STM32MP1 Distribution path]/layers/meta-st/meta-st-openstlinux/conf/distro/openstlinux-weston.conf
• Add IMAGE_INSTALL_append += "iotedge-daemon iotedge-cli libiothsm-std docker connman connman-client" into [your STM32MP1 Distribution path]/build-openstlinuxweston-stm32mp1/conf/local.conf
• Change ROOTFS_PARTITION_SIZE = "763904" to ROOTFS_PARTITION_SIZE = "2097152" in[your STM32MP1 Distribution path]//layers/meta-st/meta-st-stm32mp/conf/machine/include/st-machine-common-stm32mp.inc file
• delete "inherit python3targetconfig" in layers/meta-virtualization/recipes-extended/libvirt/libvirt-python.inc

3.1. Image build and flash

Go the article STM32MP1_Distribution_Package for the details about the process to build and flash your image.

To build the image:

In the folder [your STM32MP1 Distribution path]/build-openstlinuxweston-stm32mp1 Execute the command:

PC $>bitbake st-image-weston

4. Execution of the Azure IoT Edge demonstration

1.Update of the IoT Edge configuration file on the board

vi /etc/iotedge/config.yam
update hostname example with "stm32mp1"

2. Follow the process described on the Microsoft Azure website

Internet of Things