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Course Outline

Introduction to OpenBMC

  • Definition of a Baseboard Management Controller (BMC).
  • History of the OpenBMC project and Linux Foundation governance.
  • Supported platforms: x86, ARM, and OpenPOWER.
  • Overview of the OpenBMC software stack.

OpenBMC Architecture

  • Phosphor application framework and D-Bus communication.
  • Systemd integration and service management.
  • Entity Manager and inventory management capabilities.
  • Key repositories and inter-component relationships.

Development Environment Setup

  • Installing necessary dependencies on Ubuntu.
  • Leveraging Docker containers for reproducible builds.
  • Cloning the OpenBMC source tree.
  • Configuring Gerrit for code review processes.

Yocto and BitBake Basics

  • OpenEmbedded layer structure: meta-phosphor and meta-aspeed.
  • Understanding recipes, bbappend files, and configuration settings.
  • Constructing a reference image for QEMU.
  • Navigating local.conf and bblayers.conf configurations.

Building Your First BMC Image

  • Selecting the appropriate machine target.
  • Executing bitbake obmc-phosphor-image.
  • Analyzing the build output directory structure.
  • Flashing the image to real hardware or QEMU environments.

Customization and Configuration

  • Incorporating new machine layers.
  • Customizing D-Bus interfaces using YAML descriptors.
  • Configuring Entity Manager JSON for new hardware components.
  • Modifying systemd service files as needed.

Debugging and Troubleshooting

  • Troubleshooting build failures and bitbake errors.
  • Utilizing journalctl on the BMC system.
  • Accessing via SSH and performing console debugging.
  • Addressing common porting issues and their solutions.

Recent Updates and Modern Practices

  • Migration to C++ sdbusplus bindings.
  • New web UI (Vue.js) and bmcweb Redfish server implementation.
  • Integration of modern testing frameworks and CI pipelines.

Requirements

  • Fundamental knowledge of Linux system administration.
  • Familiarity with core embedded systems concepts.
  • Practical experience with Git and version control systems.

Target Audience

  • Embedded firmware engineers.
  • System administrators responsible for server hardware.
  • DevOps engineers overseeing data center infrastructure.
 14 Hours

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