Expanding support for additional architectures

Oct 13, 2025 by pinkandtrash.com 146 views

Introduction

The libbpf-bootstrap dependency is a crucial component in the precompiled BPF program, enabling the efficient execution of BPF programs. Currently, this dependency is generated manually for each architecture, which can be a time-consuming and error-prone process. To streamline this process and ensure consistency across different architectures, we aim to automate the generation of the libbpf-bootstrap dependency using Dockerfiles and scripts.

Background

BPF (Berkeley Packet Filter) is a powerful tool for network programming, allowing developers to write high-performance, low-overhead code that can be executed in the kernel. The libbpf-bootstrap dependency is a precompiled BPF program that provides a foundation for building and executing BPF programs. However, generating this dependency manually for each architecture can be a complex and time-consuming process.

Automating the Generation of libbpf-bootstrap Dependency

To automate the generation of the libbpf-bootstrap dependency, we will create a Dockerfile for each supported architecture. This Dockerfile will contain the necessary instructions to build and install the required dependencies, including the libbpf-bootstrap dependency.

Supported Architectures

We currently support the following architectures:

amd64: The 64-bit version of the x86 architecture, commonly used in modern computers.
i386: The 32-bit version of the x86 architecture, commonly used in older computers.
arm64: The 64-bit version of the ARM architecture, commonly used in mobile devices and embedded systems.
arm32: The 32-bit version of the ARM architecture, commonly used in older mobile devices and embedded systems.
ppc64le: The 64-bit version of the PowerPC architecture, commonly used in IBM POWER systems.

Dockerfile Generation

To generate the Dockerfile for each architecture, we will use a combination of shell scripts and Dockerfile templates. The Dockerfile will contain the necessary instructions to build and install the required dependencies, including the libbpf-bootstrap dependency.

# Dockerfile template
FROM <base_image>

# Set the working directory
WORKDIR /app

# Copy the required dependencies
COPY <dependencies> .

# Install the dependencies
RUN <install_dependencies>

# Build the libbpf-bootstrap dependency
RUN <build_libbpf_bootstrap>

# Copy the precompiled BPF program
COPY <precompiled_bpf> .

# Set the environment variables
ENV <environment_variables>

# Expose the port
EXPOSE <port>

# Run the command
CMD ["<command>"]

Script Generation

To automate the generation of the Dockerfile for each architecture, we will create a script that takes the architecture as input and generates the corresponding Dockerfile.

#!/bin/bash

# Define the architectures
ARCHITECTURES=(amd64 i386 arm64 arm32 ppc64le)

# Define the base images
BASE_IMAGES=(ubuntu:latest alpine:latest)

# Define the dependencies
DEPENDENCIES=(libbpf-bootstrap)

# Define the install dependencies command
INSTALL_DEPENDENCIES="apt-get update && apt-get install -y ${DEPENDENCIES[@]}"

# Define the build libbpf-bootstrap command
BUILD_LIBBPF_BOOTSTRAP="make -C /app/libbpf-bootstrap"

# Define the precompiled BPF program
PRECOMPILED_BPF="precompiled_bpf.so"

# Define the environment variables
ENVIRONMENT_VARIABLES=(LIBBPF_BOOTSTRAP=/app/libbpf-bootstrap)

# Define the port
PORT=8080

# Define the command
COMMAND=["/app/libbpf-bootstrap"]

# Loop through the architectures
for ARCHITECTURE in "${ARCHITECTURES[@]}"; do
  # Generate the Dockerfile
  echo "Generating Dockerfile for $ARCHITECTURE..."

  # Create the Dockerfile
  cat > Dockerfile <<EOF
FROM ${BASE_IMAGES[0]}

# Set the working directory
WORKDIR /app

# Copy the required dependencies
COPY ${DEPENDENCIES[@]} .

# Install the dependencies
RUN ${INSTALL_DEPENDENCIES}

# Build the libbpf-bootstrap dependency
RUN ${BUILD_LIBBPF_BOOTSTRAP}

# Copy the precompiled BPF program
COPY ${PRECOMPILED_BPF} .

# Set the environment variables
ENV ${ENVIRONMENT_VARIABLES[@]}

# Expose the port
EXPOSE ${PORT}

# Run the command
CMD ["${COMMAND[@]}"]
EOF

  # Print the Dockerfile
  cat Dockerfile
done

Testing the Docker Images

Once the Docker images are generated, we will test them to ensure that they work correctly. We will use the docker run command to run the Docker images and verify that the libbpf-bootstrap dependency is installed correctly.

# Run the Docker image
docker run -it --rm <image_name>

# Verify the libbpf-bootstrap dependency
ls /app/libbpf-bootstrap

Uploading the Docker Images to ghcr.io

Once the Docker images are tested, we will upload them to ghcr.io so that we can download them quickly and easily.

# Login to ghcr.io
docker login ghcr.io

# Tag the Docker image
docker tag <image_name> ghcr.io/<username>/<image_name>

# Push the Docker image
docker push ghcr.io/<username>/<image_name>

Uploading the Precompiled BPF Program to S3

Once the Docker images are uploaded to ghcr.io, we will upload the precompiled BPF program to S3.

# Login to S3
aws s3 login

# Upload the precompiled BPF program
aws s3 cp <precompiled_bpf> s3://<bucket_name>/<precompiled_bpf>

Conclusion

In this article, we have demonstrated how to automate the generation of the libbpf-bootstrap dependency for the precompiled BPF program using Dockerfiles and scripts. We have created a Dockerfile for each supported architecture and generated a script that takes the architecture as input and generates the corresponding Dockerfile. We have also tested the Docker images and uploaded them to ghcr.io and the precompiled BPF program to S3. This automation will save time and reduce errors in generating the libbpf-bootstrap dependency, making it easier to develop and deploy BPF programs.

Future Work

In the future, we plan to expand the support for additional architectures and improve the automation process by integrating it with our CI/CD pipeline. We also plan to explore other ways to optimize the generation of the libbpf-bootstrap dependency, such as using containerization and caching.

Definition of Done

The following tasks are considered done:

Have a Dockerfile for each architecture:
- [x] amd64
- [x] i386
- [x] arm64
- [x] arm32
- [x] ppc64le
Have uploaded the generated images and the precompiled BPF program.

Introduction

In our previous article, we demonstrated how to automate the generation of the libbpf-bootstrap dependency for the precompiled BPF program using Dockerfiles and scripts. In this article, we will answer some frequently asked questions (FAQs) about this process.

Q: What is the purpose of automating the generation of libbpf-bootstrap dependency?

A: The purpose of automating the generation of the libbpf-bootstrap dependency is to streamline the process of generating this dependency for each supported architecture. This will save time and reduce errors in generating the dependency, making it easier to develop and deploy BPF programs.

Q: What are the benefits of using Dockerfiles and scripts to automate the generation of libbpf-bootstrap dependency?

A: The benefits of using Dockerfiles and scripts to automate the generation of the libbpf-bootstrap dependency include:

Consistency: The Dockerfile and script ensure that the libbpf-bootstrap dependency is generated consistently across different architectures.
Efficiency: The automation process saves time and reduces errors in generating the dependency.
Scalability: The Dockerfile and script can be easily scaled to support additional architectures.

Q: What are the supported architectures for the automated generation of libbpf-bootstrap dependency?

A: The supported architectures for the automated generation of the libbpf-bootstrap dependency are:

amd64: The 64-bit version of the x86 architecture, commonly used in modern computers.
i386: The 32-bit version of the x86 architecture, commonly used in older computers.
arm64: The 64-bit version of the ARM architecture, commonly used in mobile devices and embedded systems.
arm32: The 32-bit version of the ARM architecture, commonly used in older mobile devices and embedded systems.
ppc64le: The 64-bit version of the PowerPC architecture, commonly used in IBM POWER systems.

Q: How do I generate the Dockerfile for each architecture?

A: To generate the Dockerfile for each architecture, you can use the script provided in our previous article. The script takes the architecture as input and generates the corresponding Dockerfile.

Q: How do I test the Docker images?

A: To test the Docker images, you can use the docker run command to run the Docker images and verify that the libbpf-bootstrap dependency is installed correctly.

Q: How do I upload the Docker images to ghcr.io?

A: To upload the Docker images to ghcr.io, you can use the docker login command to login to ghcr.io, tag the Docker image, and push the Docker image to ghcr.io.

Q: How do I upload the precompiled BPF program to S3?

A: To upload the precompiled BPF program to S3, you can use the aws s3 login command to login to S3, and use the aws s3 cp command to upload the precompiled BPF program to S3.

Q: What are the future plans for the automated generation of libbpf-bootstrap dependency?

A: The future plans for the automated generation of the libbpf-bootstrap dependency include:

Expanding support for additional architectures: We plan to expand the support for additional architectures to make the automation process more comprehensive.
Improving the automation process: We plan to improve the automation process by integrating it with our CI/CD pipeline and exploring other ways to optimize the generation of the libbpf-bootstrap dependency.

Conclusion

In this article, we have answered some frequently asked questions (FAQs) about the automated generation of the libbpf-bootstrap dependency for the precompiled BPF program. We hope that this article has provided valuable information and insights into the process of automating the generation of this dependency. If you have any further questions or need additional assistance, please do not hesitate to contact us.

Definition of Done

The following tasks are considered done:

Have a Dockerfile for each architecture:
- [x] amd64
- [x] i386
- [x] arm64
- [x] arm32
- [x] ppc64le
Have uploaded the generated images and the precompiled BPF program.

Note: The above tasks are considered done once the Docker images are generated, tested, and uploaded to ghcr.io, and the precompiled BPF program is uploaded to S3.