Navigating the Journey from Private to Open Source: A Comprehensive Guide

Embracing Openness: A Strategic Leap Beyond Code Visibility

Strategic Planning for Open Source: Beyond Repository Visibility

Transforming a proprietary project into an open-source one is a multifaceted undertaking that extends far beyond merely altering GitHub repository settings. It necessitates a meticulously crafted transition blueprint, particularly if the ambition is to cultivate a dynamic community where users can prosper and leverage the platform to its fullest potential. The StackRox team's experience underscores the critical importance of this strategic foresight, emphasizing that a successful transition hinges on aligning the project's objectives with the aspirations of its future community.

Laying the Foundation: Product Scope and Engineering Integration

When StackRox embarked on its open-source journey, a pivotal decision involved determining the scope of what would be made publicly available. Rather than selectively opening components, the team committed to releasing the entire platform, including all its dependencies, standard policy rulesets, pre-built Docker images, and Helm charts. This comprehensive approach aimed to minimize the barrier to entry for new users and contributors, even though it demanded additional effort. This decision reflects a commitment to a truly open ecosystem, making the platform as accessible and functional as possible from day one.

Selecting the Appropriate License: A Critical Legal Step

A fundamental step in open-sourcing any project is the selection of a suitable license. This decision, ideally made in consultation with legal experts, dictates how the software can be used, modified, and distributed. Drawing inspiration from established open-source projects and Red Hat’s own practices, StackRox opted for the Apache 2.0 license, a widely recognized and permissive choice that encourages broad adoption and collaboration while providing clear terms of use.

Ensuring Accessibility: Making the Project Publicly Available

Once the scope and licensing are settled, the next challenge is to ensure the project is easily accessible to the public. For StackRox, this involved not only making the source code available but also publicizing Docker images. This commitment necessitated opening the continuous integration (CI) process to public scrutiny. A thorough review of CI configurations is paramount, as insecure setups can be exploited. Safeguarding against credential exposure, unauthorized service account access, and the potential misuse of CI resources for activities like cryptomining requires careful attention to security protocols and clear definitions of who can trigger CI runs.

Streamlining Management: Navigating Dual Build Pipelines

The transition to open source often introduces complexities in managing build processes. StackRox, for instance, operates an upstream public build for its open-source version, while Red Hat Advanced Cluster Security (RHACS) maintains a separate internal build system. This dual-pipeline approach, while necessary, inherently creates overhead due to the differing requirements of open-source and commercial offerings. The goal is to produce reliable artifacts—whether release binaries, compressed files, or Docker images—that meet the quality standards for both ecosystems.

Facilitating Distribution: Reaching the Broader Community

Effective distribution of project artifacts is crucial for lowering the barrier to entry and encouraging widespread adoption. StackRox chose to publish its built images on a public organization within Quay.io. Other platforms like GitHub's release features, NPM, PyPI, or Crates offer alternative distribution channels, depending on the nature of the release artifact. Publicizing these artifacts is the penultimate step before users can begin engaging with the product, leading directly to the importance of comprehensive documentation.

Crafting Comprehensive Documentation: The Project's Public Face

Project documentation serves as the primary gateway for both potential users and contributors, acting as the public representation of the project. Clear, accessible documentation is often the first point of contact, helping individuals determine if the project aligns with their needs and how to utilize it effectively. It should aim to minimize confusion, clarify common issues, and address different audiences. It's crucial to recognize that documentation for operators (focused on deployment, configuration, maintenance) differs significantly from that for developers (focused on development environments, APIs). Both groups, however, greatly benefit from "Getting Started" guides. StackRox, as an upstream project for RHACS, prioritizes developer-centric documentation, expanding its READMEs and dedicated development guides, continuously evolving based on community feedback.

Upholding Privacy and Data Integrity in the Public Domain

Transitioning to open source requires meticulous attention to privacy, especially concerning historical data. The inherent nature of Git means that the entire project history, including commits, issues, and pull requests, becomes public. While this is inconsequential for internal projects, it can present significant challenges when going public. It is strongly recommended to rigorously review all past communications and repository history to identify and remove any sensitive information or references not intended for public disclosure. While starting a new repository can bypass historical issues, it strips the engineering team of valuable context and requires careful coordination to prevent accidental reintroduction of old history.

Managing Security Vulnerabilities: A Dedicated Workflow for CVEs

For projects dealing with Common Vulnerabilities and Exposures (CVEs) or embargoed security work, a specialized workflow is indispensable. A public repository means that traditional feature branches cannot be used for sensitive security fixes. Platforms like GitHub offer mechanisms, such as temporary private forks, to facilitate the resolution of security issues discreetly before public disclosure, ensuring the integrity and security of the open-source project.

Prioritizing the Engineering Team: Maintaining Engagement and Awareness

Throughout the open-source transition, it is paramount to keep the engineering team fully informed and engaged. For the Red Hat Advanced Cluster Security (RHACS) engineering team, a design-document-driven process facilitates discussions and consensus-building on significant changes. This ensures that workflows and approaches are adopted willingly, promoting team satisfaction. Since engineers remain the core drivers of the project, understanding how their daily operations will change post-transition is vital. The move also presents opportunities for engineers to contribute back to original upstream projects with product-specific enhancements, fostering a culture of external collaboration. While the core work remains similar, the public visibility of pull requests and discussions necessitates a conscious effort in communication, as external audiences may lack internal context or shared humor.

Fostering a Thriving Community: Communication and Contribution

As an open-source project gains traction, establishing clear guidelines for community interaction is crucial for maintaining a healthy and inclusive environment. Adopting a Code of Conduct (CoC), such as the Contributor Covenant, sets fundamental expectations for behavior and outlines what will not be tolerated. However, a CoC is only effective if it is enforced. This requires identifying and training volunteers for a CoC committee, whose members should be publicly accessible for communication regarding any issues. Selecting a primary communication channel—be it Slack, Discord, mailing lists, or forums—is also essential for engaging with the community effectively. StackRox, for instance, utilizes the CNCF Slack workspace. Clearly defined contribution guidelines, such as a CONTRIBUTING.md file or Issue/PR templates, are vital for managing contributions, alongside setting expectations for response times and assigning responsibilities for monitoring new submissions. Regular public meetings further democratize participation, offering a direct channel for discussions, demos, and Q&A sessions, lowering the barrier for interested contributors to engage with the project team.

Inviting Participation: Your Role in the Open Source Journey

The StackRox team has dedicated significant effort to building a comprehensive open-source Kubernetes security platform. Now, they look to the community for feedback and collaboration to further strengthen container workload security. Users are encouraged to join their Slack channel, star their GitHub repository, and actively participate in the community to become a "RoxStar." Questions and contributions are welcomed, fostering a collaborative spirit aimed at collective advancement.