= meta-updater :toc: macro :toc-title: :devguide-docsroot: https://docs.ota.here.com/ota-client/latest/ :getstarted-docsroot: https://docs.ota.here.com/getstarted/dev/
Meta-updater is a link:https://www.yoctoproject.org/software-overview/layers/[Yocto layer] that enables over-the-air updates (OTA) with https://github.com/ostreedev/ostree[OSTree] and https://github.com/advancedtelematic/aktualizr[Aktualizr] -- the default client for link:https://www.here.com/products/automotive/ota-technology[HERE OTA Connect].
https://github.com/ostreedev/ostree[OSTree] is a tool for atomic full file system upgrades with rollback capability. OSTree has several advantages over traditional dual-bank systems, but the most important one is that it minimizes network bandwidth and data storage footprint by sharing files with the same contents across file system deployments.
https://github.com/advancedtelematic/aktualizr[Aktualizr] implements https://uptane.github.io/uptane-standard/uptane-standard.html[Uptane], supports device authentication and provisioning, and is integrated with OSTree. You can connect aktualizr to your own server solution or sign up for a free account at https://connect.ota.here.com/[HERE OTA Connect] to get started.
== Quickstart
If you don't already have a Yocto project that you want to add OTA to, you can use the xref:{getstarted-docsroot}get-started.html[HERE OTA Connect Quickstart] project to rapidly get up and running on a xref:{getstarted-docsroot}raspberry-pi.html[Raspberry Pi] or with xref:{getstarted-docsroot}qemuvirtualbox.html[QEMU]. It takes a standard https://www.yoctoproject.org/tools-resources/projects/poky[poky] distribution, and adds OTA and OSTree capabilities.
== Dependencies
In addition to the link:https://www.yoctoproject.org/docs/current/ref-manual/ref-manual.html#required-packages-for-the-build-host[standard Yocto dependencies], meta-updater generally requires a few additional dependencies, depending on your use case and target platform. To install these additional packages on Debian/Ubuntu, run this:
.... sudo apt install cpu-checker default-jre parted ....
To build for https://github.com/advancedtelematic/meta-updater-minnowboard[Minnowboard] with GRUB, you will also need to install https://github.com/tianocore/tianocore.github.io/wiki/OVMF[TianoCore's ovmf] package on your host system. On Debian/Ubuntu, you can do so with this command:
.... sudo apt install ovmf ....
[discrete] == Table of Contents
The following documentation focuses on tasks that involve the meta-updater layer. If you want to get an idea of the overall developer workflow in OTA Connect, see the link:{devguide-docsroot}index.html[OTA Connect Developer Guide].
Find out if your board is supported and learn about the minimum hardware requirements.
Learn how to use this layer as part of AGL.
Learn how to add this layer to your own Yocto project.
Learn how to configure OTA-related functionality when building images, including how to install custom versions of aktualizr.
Learn how to optimize your build for development or production.
Learn more about the methods for provisioning devices. For more detail, you may also want to read about how to xref:{devguide-docsroot}enable-device-cred-provisioning.html[enable device credential provisioning] or how to xref:{devguide-docsroot}simulate-device-cred-provtest.html[simulate it for testing].
Learn about the garage-push and garage-sign utilities, aktualizr configuration recipes, and service resource control.
Learn how to use the oe-selftest framework for quality assurance and how to run the aktualizr test suite via ptest.
Get help on common problems.
== License
This code is licensed under the link:COPYING.MIT[MIT license], a copy of which can be found in this repository. All code is copyright HERE Europe B.V., 2016-2020.
We require that contributors accept the terms of Linux Foundation's link:https://developercertificate.org/[Developer Certificate of Origin]. Please see the https://github.com/advancedtelematic/aktualizr/blob/master/CONTRIBUTING.md[contribution instructions of aktualizr] for more information.