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Running Game Dev Build Pipelines in Hyper-V

#1
02-05-2020, 01:28 PM
When setting up a game development pipeline using Hyper-V, the flexibility and performance offered by Windows Server's built-in virtualization can significantly streamline your workflow. I often find that utilizing Hyper-V creates a reliable environment where I can quickly test, build, and deploy my game assets.

Hyper-V allows you to run multiple virtual machines, enabling you to isolate different environments. This practice becomes especially useful when testing various game builds across different configurations. For example, you can run a VM with an older version of Windows specifically for compatibility testing. With Hyper-V, creating and managing those instances can be efficiently accomplished.

Setting up your development environment begins with the appropriate installation. I recommend using Windows Server 2019 or later, as this version vastly improves Hyper-V capabilities. Make sure you install the Hyper-V role through Server Manager, which is a pretty straightforward process. Once that’s completed, you'll want to enable the Hyper-V Manager for easier management.

Creating a VM to run your game development pipeline is essential. I usually allocate at least 4GB of RAM and a couple of CPU cores, depending on the complexity of the game I'm developing. Solid-state drives should be utilized for your virtual hard disks as that directly affects performance. For example, while working on a new concept art game, I noticed substantial differences in loading times between traditional hard disk drives and SSDs.

Networking configuration is another key area to focus on. For development and testing, it's often beneficial to set up an internal network switch. This isolation allows the VMs to communicate with each other without opening them up to the outside internet. I usually create a virtual switch in Hyper-V Manager, choosing the “Internal” option, which lets me connect to my host machine while keeping the VMs contained.

You may want to consider how often you need to build your game. If you're like me and you often punch out updates on a regular basis, automating the build pipeline is a game changer. I rely on tools like Azure DevOps or Jenkins for automating builds. Integrating these tools with Hyper-V allows you to create automatic jobs that will deploy a new version of your game whenever you push code changes.

Let’s look at a practical example. While building a multiplayer game, new features were developed that required robust testing. I set up a Jenkins job which executed a PowerShell script within the Hyper-V VM to pull down the latest code from the repository, build it, and run automated tests. The PowerShell script looked something like this:


# Pull the latest code
cd "C:\path\to\your\game\repo"
git pull origin master

# Build the game
& "C:\path\to\your\build\tool.exe" build

# Run tests
& "C:\path\to\your\test\framework.exe" run


By scheduling this job to trigger every time a new commit is made, I can automatically test new code without manual intervention. If an error pops up, I get an immediate notification, and this drastically reduces the feedback loop.

Storage management can be another concern. I prefer to use fixed-size disks for my VMs, as they often perform better than dynamic disks in situations where I have a lot of disk activity, such as during exports or large asset imports. When one of my projects required extensive 3D models, fixed disks were a strong choice to avoid performance drops during operations.

The need for backups can't be overlooked. Quick recovery options are essential in a development pipeline. BackupChain Hyper-V Backup offers a solution that efficiently backs up Hyper-V VMs. When changes happen in the VM, it can quickly capture snapshots to avoid data loss. The use of incremental backups can significantly reduce the storage footprint.

For game builds that require various database configurations or game states, I tend to utilize snapshots. Hyper-V allows you to create a snapshot of a VM at any point in time. I frequently find myself in scenarios where various game states need testing, and having snapshots means I can jump back to a previous point without having to rebuild environments from scratch. Before testing, I create a snapshot, run my tests, and, if everything goes south, revert back to the snapshot. This capability really speeds up my workflow.

In many cases, you might find yourself having multiple VMs for testing. In one of my earlier projects, I had different VMs set up for various game engines, like Unity and Unreal Engine. Each VM was pre-configured with the necessary tools and environment settings. This means that I didn’t have to spend time setting up each engine and could instead focus on developing the game.

Resource allocation also calls for careful planning. When you're running multiple VMs, you'll need to manage the allocations properly. Hyper-V Manager shows resource performance metrics. This feature helps to identify if any of your VMs are hogging CPU or memory, which can ultimately slow down your development process. In a recent game build, one of my machines consumed excessive memory due to a memory leak in a particular testing setup. By monitoring resource usage, I was able to identify and resolve the issue before it impacted the rest of my builds.

For team collaboration, the conventional practice involves using version control systems. When operating within a Hyper-V environment, it's common practice to pull code changes from a repository hosted on platforms like GitHub or GitLab. However, I also recommend running your builds and tests within a CI/CD ecosystem. This means all your decisions from code merge to testing results will surface in one spot, easing the participation of your team members.

When setting up alerts and monitoring for your builds, it often helps to track performance not just for the active VMs, but also for the Hyper-V host itself. Implementing tools like Windows Performance Monitor can give insights on how your host is performing — an essential factor to consider if you're aiming for a streamlined environment.

While on this topic, reviewing logs from Hyper-V can sometimes reveal issues that might not be apparent otherwise. For example, there could be warnings related to migration failures or resource allocation problems. I make it a regular part of my workflow to check these logs to prevent any bottlenecks from creeping up on me unexpectedly.

Another consideration is scaling. When game development transcends the art and design phase into a polished product, the number of concurrent builds might rise. It’s practical to consider horizontal scaling with additional hosts if your single Hyper-V server becomes a bottleneck. In one project, I added another Hyper-V host, which allowed my team to run concurrent tests without interruptions during peak hours.

Adapting to changes in the development life cycle often means putting additional measures in place for deployment pipelines. I frequently implement staging environments using different VMs to ensure smooth production rollouts. Automated scripts do the heavy lifting, moving files from the build VM to the release VM that serves the actual production environment. With PowerShell remoting, file copies can be scripted to run with minimal input.


# Copy from build VM to release VM
Copy-VMFile -Source VM1 -Destination VM2 -Path C:\BuildOutput -DestinationPath C:\Release


Staying current is also essential. Hyper-V regularly receives patches and updates to improve security, performance, and functionality. I find it helpful to stay ahead in keeping the environment updated—both in your host server and the Hyper-V role itself. Each update can yield performance improvements or additional features that will be beneficial for your existing pipelines.

Monitoring network traffic should also be part of the game dev pipeline in Hyper-V. If you are doing multiplayer testing, you should have some tools to visualize your traffic. This ensures you understand how your game behaves under load, especially with multiple users testing simultaneously. Performance metrics that show network latency, packet loss, and various other statistics can help you root out issues early in the testing stage.

With a solid Hyper-V setup, I often leverage scripting to automate routine tasks even further. I can create scripts for cleaning up old snapshots or unused VMs that could clutter the environment. Using PowerShell combined with Hyper-V commands allows for quick batch operations that would otherwise consume too much time if performed manually.

In larger collaborative projects, I'd always recommend setting communication protocols. When changes occur, everyone involved should be notified. Automated alerts through emails post-build can provide immediate updates that inform team members of successes or failures, thereby promoting more agile iterations on the game content.

Always remember to plan for disaster recovery by ensuring your Hyper-V setups are backed up. BackupChain is an efficient solution available that can automagically schedule backups of VMs and ensure recoverability in case of system failures or data corruption. Enabling such a feature not only reduces risks but can also save countless hours when the unthinkable happens.

Introducing BackupChain Hyper-V Backup
BackupChain Hyper-V Backup supports seamless backups of Hyper-V VMs. This solution is designed to perform both full and incremental backups while preserving performance during backup processes. Retaining versions of backups helps recover older VM states whenever needed. BackupChain’s built-in scheduling feature allows backups to occur without human intervention, ensuring peace of mind.

The deduplication feature, combined with incremental backups, significantly minimizes storage requirements, allowing more room for development assets. Users can schedule backups during off-peak hours, optimizing resource utilization while ensuring that their VMs are always protected.

Philip@BackupChain
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Running Game Dev Build Pipelines in Hyper-V - by Philip@BackupChain - 02-05-2020, 01:28 PM

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