Building GitLab with GitLab: A multi-region service to deliver AI features

GitLab has implemented a multi-region service strategy to enhance the performance of its AI-powered capabilities, such as GitLab Duo's Code Suggestions, by reducing latency and improving user experience. This initiative led to the creation of Runway, an internal platform as a service (PaaS) developed in 2023 to enable GitLab service owners to self-serve their infrastructure needs using GitLab's core features. Runway employs automated GitOps practices, leveraging infrastructure as code (IaC) and CI/CD processes, and is built on Google Cloud Platform's Cloud Run, allowing for scalable multi-region deployments. This setup increases responsiveness and availability by serving requests from the closest locations to end users, ensuring fault tolerance and reducing downtime risks. The transition to multi-region deployment was achieved with zero downtime through practices like dry run deployments and regional observability enhancements, allowing service owners to self-serve additional regions and ensuring a scalable and efficient platform. As a result, GitLab Duo is now available in multiple global regions, and the continuous development of Runway aims to further integrate and evolve its platform runtime, underscoring GitLab's commitment to providing a seamless developer experience.

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