Mender is an open source over-the-air (OTA) software updater for embedded Linux devices. Mender comprises a client running at the embedded device, as well as a server that manages deployments across many devices.
This repository contains mender-convert, which is used to convert pre-built disk images (Debian, Ubuntu, Raspbian, etc) to a Mender compatible image by restructuring partition table and injecting the necessary files.
Currently official Raspberry Pi 3 and BeagleBone Black images are supported and this will be extended.
To start using Mender, we recommend that you begin with the Getting started section in the Mender documentation.
Docker environment for mender-convert
In order to correctly set up partitions and bootloaders, mender-convert has many dependencies, and their version and name vary between Linux distributions.
To make using mender-convert easier, a reference setup using a Ubuntu 18.04 Docker container is provided.
You need to install Docker Engine to use this environment.
Build the mender-convert container image
To build a container based on Ubuntu 18.04 with all required dependencies for mender-convert, copy this directory to your workstation and change the current directory to it.
This will create a container image you can use to run mender-convert.
Use the mender-convert container image
Create a directory
input under the directory where you copied these files (
Then put your raw disk image into
mv ~/Downloads/2018-11-13-raspbian-stretch.img input/2018-11-13-raspbian-stretch.img
You can run mender-convert from inside the container with your desired options, e.g.
DEVICE_TYPE="raspberrypi3" RAW_DISK_IMAGE="input/2018-11-13-raspbian-stretch.img" ARTIFACT_NAME="2018-11-13-raspbian-stretch" MENDER_DISK_IMAGE="2018-11-13-raspbian-stretch.sdimg" TENANT_TOKEN="<INSERT-TOKEN-FROM Hosted Mender>" ./docker-mender-convert from-raw-disk-image \ --raw-disk-image $RAW_DISK_IMAGE \ --mender-disk-image $MENDER_DISK_IMAGE \ --device-type $DEVICE_TYPE \ --mender-client /mender \ --artifact-name $ARTIFACT_NAME \ --bootloader-toolchain arm-linux-gnueabihf \ --server-url "https://hosted.mender.io" \ --tenant-token $TENANT_TOKEN
Note that the default Mender client is the latest stable and cross-compiled for generic ARM boards,
which should work well in most cases. If you would like to use a different Mender client,
place it in
input/ and adjust the
Conversion will take 10-15 minutes, depending on your storage and resources available.
You can watch
output/build.log for progress and diagnostics information.
After it finishes, you can find your images in the
output directory on your host machine!
- BeagleBone images might not convert properly using this docker envirnoment due to permission issues:
mount: /mender-convert/output/embedded/rootfs: WARNING: device write-protected, mounted read-only.
We welcome and ask for your contribution. If you would like to contribute to Mender, please read our guide on how to best get started contributing code or documentation.
Mender is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.
We take security very seriously. If you come across any issue regarding security, please disclose the information by sending an email to firstname.lastname@example.org. Please do not create a new public issue. We thank you in advance for your cooperation.