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Course Outline

Introduction to OpenBMC

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

OpenBMC Architecture

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

Development Environment Setup

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

Yocto and BitBake Fundamentals

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

Building Your First BMC Image

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

Customization and Configuration

  • Incorporating new machine layers
  • Tailoring D-Bus interfaces using YAML descriptors
  • Configuring Entity Manager JSON for new hardware support
  • Modifying systemd service files

Debugging and Troubleshooting

  • Troubleshooting build failures and bitbake errors
  • Utilizing journalctl on the BMC
  • SSH access and console debugging techniques
  • Common porting issues and their solutions

Recent Updates and Modern Practices

  • Transition to C++ sdbusplus bindings
  • New web UI (Vue.js) and bmcweb Redfish server implementation
  • Contemporary testing frameworks and CI integration

Requirements

  • Fundamental knowledge of Linux system administration
  • Understanding of embedded systems concepts
  • Proficiency with Git and version control systems

Target Audience

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

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