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Course Outline

Introduction to OpenBMC

  • Understanding Baseboard Management Controllers (BMCs).
  • History of the OpenBMC project and its governance by the Linux Foundation.
  • Supported platforms: x86, ARM, and OpenPOWER.
  • Overview of the OpenBMC software stack.

OpenBMC Architecture

  • The Phosphor application framework and D-Bus.
  • Systemd integration and service management.
  • Entity Manager and inventory management functions.
  • Key repositories and the relationships between components.

Development Environment Setup

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

Yocto and BitBake Basics

  • Structure of OpenEmbedded layers: meta-phosphor, meta-aspeed.
  • Understanding recipes, bbappend files, and configuration files.
  • Building a reference image for QEMU emulation.
  • Managing local.conf and bblayers.conf settings.

Building Your First BMC Image

  • Selecting the appropriate machine target.
  • Executing the build command: bitbake obmc-phosphor-image.
  • Interpreting the build output directory structure.
  • Flashing the image to physical hardware or QEMU instances.

Customization and Configuration

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

Debugging and Troubleshooting

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

Recent Updates and Modern Practices

  • Migration to C++ sdbusplus bindings.
  • Introduction of the new Vue.js-based web UI and bmcweb Redfish server.
  • Implementation of modern testing frameworks and CI integration.

Requirements

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

Audience

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

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