RDK-B Dobby Demo

Scope

Dobby is a container management tool, to make it easy for other applications to start/stop/monitor containers. It can be thought of as a "Docker for the embedded world". 

This page demonstrates building a sample Java application in RDK framework and running in a container using Dobby in a RDK-B reference board ( Rpi ).

Key Links

• Dobby source code: https://github.com/rdkcentral/Dobby

• DAC Working Group: DAC - Advanced Support Program - RDK Central Wiki

Major Dobby Components in RDK-B

• DobbyDaemon

  • This is the main Dobby process, which is launched at bootup by systemd. When started, DobbyDaemon registers itself on dbus. It then idles and waits for commands over dbus to start, stop or inspect containers.

• DobbyTool

  • CLI to interact with Dobby for developers, and issue commands such as start, stop or info

Build Dobby in RDK-B

1. Getting the RDK-B dunfel Code 

   mkdir < workspace_dir> cd  <workspace_dir> repo init -u https://code.rdkcentral.com/r/manifests -b dunfell -m rdkb-extsrc.xml repo sync -j4 --no-clone-bundle

2. Add dobby,readline and crun packages to the package recipe file to consider it during the build

   Path: ./meta-cmf-raspberrypi/recipes-core/packagegroups/packagegroup-rdk-ccsp-broadband.bbappend

   

   
   

3. Add readline dependencies in the dobby recipe file

   Path: ./meta-rdk/recipes-containers/dobby/dobby-thunderplugin.bb

   

   
   

4. Add the below kernel options to support containerization

   Path: ./meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi.inc

   

   
   

Build Java Application in RDK-B

step 5,6,7

1. Download the meta-java layer for Java support in RDKB image for Raspberry Pi

   cd  <workspace_dir> git clone git://git.yoctoproject.org/meta-java cd meta-java git checkout remotes/origin/dunfell

2. Add a new java application  

           1. Create a new recipe under meta-rdk-ext/

           2. New recipe should have the java application, corresponding .bb and license files

Running Dobby Container in Rpi

This provides details on running containerized java applications using dobby in RDK-B Platform (Raspberry Pi)

Steps:

1. rest of the steps

2.

Validation:

1.

2.

Sample Code