Explore the inner workings of OpenDev, a collaboratory for open source software development at scale, in this 45-minute conference talk from linux.conf.au. Dive into the details of developing, testing, and deploying open infrastructure using Zuul for the OpenDev project. Learn how components like Git, Gerrit, Zuul, and Gitea come together to support thousands of developers in the open source ecosystem. Discover the "dogfooding" approach used to build, test, and deploy production systems, and understand how the Zuul CI system integrates with Gerrit, Ansible, and containers. Gain insights into the gitops-style workflow that allows developers to propose changes, undergo CI testing, peer review, and automatic deployment to production. Follow along as the speaker demonstrates the practical application of these tools and processes, from system configuration and job setup to deployment and testing.