Behind the scenes of GitHub Token Scanning
We’ve extended GitHub Token Scanning to include tokens from cloud service providers and additional credentials.
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Engineering
Over the course of a year, GitHub’s engineers make millions of commits across all of our internal repositories, process billions of API requests, and run tens of thousands of deployments across the internal apps that power GitHub’s services. We use many of GitHub’s products and plenty of other open source tools to operate at this scale. Here’s an inside look into how we do it.
Applying machine intelligence to GitHub security alerts
Learn how we use machine learning to power and build on security alerts and make GitHub more secure.
Upgrading GitHub from Rails 3.2 to 5.2
On August 15th GitHub celebrated a major milestone: our main application is now running on the latest version of Rails: 5.2.1! 🎉 In total the project took a year and…
Removing jQuery from GitHub.com frontend
We have recently completed a milestone where we were able to drop jQuery as a dependency of the frontend code for GitHub.com. This marks the end of a gradual, years-long…
GLB: GitHub’s open source load balancer
At GitHub, we serve tens of thousands of requests every second out of our network edge, operating on GitHub’s metal cloud. We’ve previously introduced GLB, our scalable load balancing solution…
MySQL High Availability at GitHub
GitHub uses MySQL as its main datastore for all things non-git, and its availability is critical to GitHub’s operation. The site itself, GitHub’s API, authentication and more, all require database…
Using Figma designs to build the Octicons icon library
How we use Figma files to keep the Octicons icon library up to date
Mitigating replication lag and reducing read load with freno
At GitHub, we use MySQL as the main database technology backing our services. We run classic MySQL master-replica setups, where writes go to the master, and replicas replay master’s changes asynchronously. To be able to serve our traffic we read data from the MySQL replicas.
Stretching Spokes
GitHub’s Spokes system stores multiple distributed copies of Git repositories. This article discusses how we got Spokes replication to span widely separated datacenters. Background: Spokes GitHub developed a system called…
Transit and Peering: How your requests reach GitHub
GitHub is at a scale that provides exposure to interesting aspects of running a major site and are working to mature and level-up many parts of our infrastructure as we…
Evolution of GitHub’s data centers
Over the past 18 months we’ve made a significant investment in GitHub’s physical infrastructure. The goal of this work is to improve the redundancy and global availability of our system.…
Kubernetes at GitHub
Over the last year, GitHub has gradually evolved the infrastructure that runs the Ruby on Rails application responsible for github.com and api.github.com. We reached a big milestone recently: all web…
Topic Suggestions for Millions of Repositories
We recently launched Topics, a new feature that lets you tag your repositories with descriptive words or phrases, making it easy to discover projects and explore GitHub.com. Topic suggestions on…
Soft U2F
In an effort to increase the adoption of FIDO U2F second factor authentication, we’re releasing Soft U2F: a software-based U2F authenticator for macOS. We’ve long been interested in promoting better…
MySQL infrastructure testing automation at GitHub
Our MySQL infrastructure is a critical component to GitHub. MySQL serves GitHub.com, GitHub’s API, authentication and more. Every git request touches MySQL in some way. We are tasked with keeping…
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