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Course Outline

Introduction to OpenBMC

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

OpenBMC Architecture

  • The Phosphor application framework and D-Bus integration.
  • Service management via systemd integration.
  • Entity Manager for inventory management.
  • Key repositories and their inter-component relationships.

Setting Up the Development Environment

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

Fundamentals of Yocto and BitBake

  • Structure of the OpenEmbedded layer: meta-phosphor, meta-aspeed.
  • Comprehending recipes, bbappend files, and configuration settings.
  • Constructing a reference image for QEMU emulation.
  • Utilizing local.conf and bblayers.conf effectively.

Building Your First BMC Image

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

Customization and Configuration

  • Incorporating new machine layers.
  • Tailoring D-Bus interfaces using YAML descriptors.
  • Configuring the Entity Manager with JSON for new hardware support.
  • Modifying systemd service files to suit specific needs.

Debugging and Troubleshooting

  • Addressing build failures and debugging bitbake issues.
  • Utilizing journalctl on the BMC for logs.
  • Accessing via SSH and console for debugging purposes.
  • Solving common porting challenges.

Recent Updates and Modern Practices

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

Requirements

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

Target Audience

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

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