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Developer Tools

Using GitHub Actions with Heroku Flow for additional Security Control

Many advanced users want to use GitHub Actions with their applications on Heroku. Now there’s a straightforward way to use these great systems together, and to meet strong security and compliance requirements at the same time.

A Solution for GitHub IP Range Restrictions

Heroku is a powerful platform that offers robust CI/CD capabilities and secure, scalable environments for deploying applications. However, GitHub Orgs cannot be configured with Heroku IP ranges, which can be a requirement for some organizations’ security rules. While this is under consideration, we want to share an alternative that leverages GitHub Actions, Heroku’s ability to…

Simplifying JVM App Development with Heroku’s Buildpack Magic

Heroku’s commitment to developer productivity shines through in its powerful buildpack system . They handle the heavy lifting of building your app, letting you focus on what matters most: writing code. A prime example is the Heroku Java buildpack , a versatile tool that simplifies deploying Java applications, especially those built with popular frameworks like Spring Boot, Quarkus, and Micronaut.

One of the core strengths of Heroku buildpacks is their automatic nature. They intelligently detect your application’s language and framework, fetching the necessary build tools and configuring the Heroku platform to run your app seamlessly. This means no more wrestling with…

Heroku Extension for Visual Studio Code (VS Code) Now Generally Available

The Heroku Extension for Visual Studio Code (VS Code) is now generally available for all customers—VS Code is an all-in-one tool that brings Heroku’s cloud management directly to your favorite IDE. In today’s fast-paced, AI-assisted development environment, switching between code editors and deployment tools can slow innovation and product delivery. ‌This extension lets you focus on building great applications by streamlining cloud resource monitoring, one-click deployments, and add-on management, all within VS Code.

Why Visual Studio Code?

Visual Studio Code (VS Code) is one of the most popular code editors, loved by developers for its extensibility, lightweight…

Planting New Platform Roots in Cloud Native with Fir

Cloud platforms have come a long way since Heroku first set out to empower developers. Today’s cloud native development demands even greater flexibility, openness, and scalability. A fun fact about Heroku is that we use trees to denote the generation of the platform technology stack (aka version). In the tradition of Aspen, Bamboo, and Cedar, we are introducing Fir, the latest Heroku technology stack built on open source standards and cloud native technologies.

When we launched Cedar, we introduced a new way of thinking about application development and popularized principles like stateless applications, automated builds, and other twelve-factor…

Router 2.0 and HTTP/2 Now Generally Available

Back in September 2023, we announced our Public Beta for our new Common Runtime router: Router 2.0 .

Now generally available, Router 2.0 will replace the legacy Common Runtime router in the coming months, and bring new networking capabilities and performance to our customers.

The beta launch of Router 2.0 also enabled us to deliver HTTP/2 to our customers. And now, because Router 2.0 has become generally available, HTTP/2 is also generally available for all common runtime customers and even Private Spaces customers too.

We’re excited to have Router 2.0 be the foundation for Heroku to…

Pumas, Routers & Keepalives—Oh my!

Update : Puma 7.0 was released with a fix for the bug described in this article. We recommend Ruby applications upgrade to Puma 7.0.4 or higher. This week , Heroku made Router 2.0 generally available, bringing features like HTTP/2 , performance improvements and reliability enhancements out of the beta program !

Throughout the Router 2.0 beta, our engineering team has addressed several bugs, all fairly straight-forward with one exception involving Puma -based applications. A small subset of Puma applications would experience increased response times upon enabling the Router 2.0 flag, reflected in customers’ Heroku dashboards and router logs. After thorough…

Tips & Tricks for Migrating to Router 2.0

Heroku Router 2.0 is now generally available, marking a significant step forward in our infrastructure modernization efforts. The new router delivers enhanced performance and introduces new features to improve your applications’ functionality. There are, of course, nuances to be aware of with any new system, and with Router 2.0 set to become the default router soon, we’d like to share some tips and tricks to ensure a smooth and seamless transition.

Start with a Staging Application

We recommend exploring the new router’s features and validating your specific use cases in a controlled environment. If you…

Heroku Open Sources the Twelve-Factor App Definition

Today, we are excited to announce Twelve-Factor is now an open source project. This is a special moment in the journey of Twelve-Factor over the years. Published over a decade ago by Heroku co-founder Adam Wiggins to codify the best practices for writing SaaS apps , the ideas espoused on the Twelve-Factor App website inspired many generations of software engineers and the principles we take for granted in modern application development.

Open sourcing the 12-Factor App is an important milestone to take the industry forward and codify best practices for the future. As the modern app architecture reflected in the…

Testing a React App in Chrome with Heroku CI

When building web applications, unit testing your individual components is certainly important. However, end-to-end testing provides assurance that the final user experience of your components chained together matches the expected behavior. Testing web application behavior locally in your browser can be helpful, but this approach isn’t efficient or reliable, especially as your application grows more complex.

Ideally, end-to-end tests in your browser are automated and integrated into your CI pipeline. Every time you commit a code change, your tests will run. Passing tests gives you the confidence that the application — as your end users experience it —…

Updating Twelve-Factor: A Call for Participation

Over a decade ago, Heroku co-founder Adam Wiggins published the Twelve-Factor App methodology as a way to codify the best practices for writing SaaS applications . In that time, cloud-native has become the default for all new applications, and technologies like Kubernetes are widespread. Best-practices for software have evolved, and we believe that Twelve-Factor also needs to evolve — this time with you, the community.

Originally, the Twelve-Factor manifesto focused on building deployable applications without thinking about deployment, and while its core concepts are still remarkably relevant , the examples are another story. Industry practices have evolved considerably…

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