How OVHcloud Built One of the World's Largest OpenStack Deployments

Back in 2012, when most companies were still figuring out what cloud computing even meant, OVHcloud made a bet that would shape the next decade of their infrastructure. They picked OpenStack—a relatively young open-source project at the time—and decided to run it at massive scale for public cloud services. This wasn't the typical use case. Most organizations were deploying OpenStack for private, on-premises setups. OVHcloud went the opposite direction.

Fast forward to today, and they're operating one of the largest OpenStack environments globally. But getting there wasn't just about installing software and calling it a day.

Why OpenStack Made Sense for a Public Cloud Provider

OpenStack caught on because it promised something rare in tech: a comprehensive toolkit for building cloud infrastructure without vendor lock-in. For a hosting provider like OVHcloud—Europe's biggest and third-largest worldwide—this aligned perfectly with their operational philosophy.

The platform handles everything from compute resources to storage and networking through modular components. You can pick what you need and ignore the rest. More importantly, since it's open source, you're not at the mercy of a single vendor's roadmap or pricing whims.

When OVHcloud started experimenting with OpenStack in 2012, they were tackling real problems: how to handle high availability when you're serving thousands of customers, how to isolate resources so one user's spike doesn't affect another, and how to scale horizontally without rebuilding everything every six months. OpenStack's flexibility made it possible to customize solutions rather than force-fitting generic enterprise software.

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From File Storage to Full Infrastructure

The journey actually began with hubiC, OVHcloud's online file storage service launched in late 2011. This was their first serious test of OpenStack, specifically the Swift component for object storage. Swift proved it could handle massive amounts of data reliably, which gave them confidence to expand.

Over the next few years, they rolled out the core services: Nova for compute, Neutron for networking, Cinder for block storage, Glance for image management, and Keystone for authentication. Each component got customized to fit OVHcloud's specific infrastructure needs.

This wasn't a one-and-done deployment. Integrating new OpenStack components became an ongoing process, with constant maintenance and optimization as requirements evolved. Running production workloads at scale surfaces edge cases that smaller deployments never encounter—the kind of bugs that only show up when you're processing thousands of requests per second across multiple datacenters.

Contributing Back to the Community

In 2014, OVHcloud officially joined the OpenStack Foundation. Their reason was straightforward: they'd learned a lot running OpenStack in production, and sharing those lessons would benefit everyone.

One year later, they made a bigger commitment. OVHcloud started donating cloud resources to power OpenStack's continuous integration system. This system is critical—it automatically compiles and tests code changes submitted by contributors from around the world. About 30,000 jobs run through this pipeline daily, and a significant chunk of those tests run on OVHcloud infrastructure.

This isn't charity. It's a practical investment. When the project's testing infrastructure runs smoothly, patches get merged faster, bugs get caught earlier, and the whole ecosystem improves. For a company betting their public cloud business on OpenStack's stability, contributing resources to strengthen the project made perfect business sense.

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Making OpenStack Accessible

Here's a problem: OpenStack is powerful but notoriously complex. The learning curve intimidates people who just want to spin up some servers and get on with their work. OVHcloud tackled this by building a control panel that abstracts away most of the complexity.

The goal was simple—let users manage instances and storage without needing to understand every technical detail of how OpenStack works under the hood. This democratization approach opened up cloud services to customers who would've been overwhelmed by raw OpenStack interfaces.

The vRack Advantage

One standout feature in OVHcloud's implementation is the vRack, which extends private networks across geographically distributed OpenStack instances. Imagine running workloads in different datacenters—say, one in Europe and another in North America—but connecting them through a private network with sub-80ms latency.

This setup works particularly well for hybrid scenarios. Customers often have dedicated servers or on-premises infrastructure that handle baseline workloads, but they need extra capacity for traffic spikes or seasonal demand. With vRack, they can burst into the public cloud seamlessly, treating remote instances almost like local resources.

The private networking isn't limited to OpenStack instances either. You can connect them to other OVHcloud services, creating flexible architectures that mix dedicated hardware, cloud instances, and managed services as needed.

What This Means for the Wider Ecosystem

OVHcloud's role in the OpenStack community is clear: they're the operators dealing with large-scale, real-world production challenges. While some contributors focus on adding new features or improving developer experience, OVHcloud brings insights from running one of the biggest deployments out there.

When you're operating at this scale, you hit problems that theoretical testing misses. Database queries that work fine with 100 users might crawl with 100,000. Network configurations that seem solid in lab environments fall apart under sustained load. By documenting these issues and working with the community on solutions, OVHcloud helps make OpenStack more robust for everyone.

The continuous integration infrastructure they support plays a quiet but essential role. Faster testing means quicker feedback for developers, which means better code quality overall. It's the kind of unglamorous work that doesn't make headlines but keeps the entire project moving forward.

The Long Game

What started as an experiment with file storage in 2012 evolved into a core part of OVHcloud's infrastructure strategy. They didn't just adopt OpenStack—they shaped their operations around it, contributed substantial resources back to the project, and built tools to make it more accessible.

The open-source model worked here because both sides benefited. OVHcloud got flexible, vendor-neutral infrastructure that scaled with their needs. The OpenStack community gained a major operator stress-testing the platform in production and feeding insights back upstream.

For anyone evaluating cloud infrastructure options, OVHcloud's experience demonstrates that open-source platforms can compete with proprietary solutions—if you're willing to invest in customization, contribute to the ecosystem, and build expertise in-house. The tradeoff is control and flexibility versus the convenience of fully managed services. Different businesses will land on different sides of that equation, but it's worth understanding what's possible when you go the open-source route.