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Running Fullstack JavaScript Apps Inside Hyper-V

#1
05-19-2022, 12:16 PM
When you're setting up a Fullstack JavaScript application inside Hyper-V, the first step typically starts with configuring your environment correctly. With Hyper-V, you have a robust platform for creating virtual machines, and I find it particularly useful when running a multi-faceted app that includes both frontend and backend components.

Hyper-V is native to Windows, which means if you're already on a Windows Server, you don’t need to install extra software. After making sure Hyper-V is installed and running, you can create a new virtual machine using the Hyper-V Manager. I often assign adequate resources like CPU and memory based on the needs of the app I'm running. If it’s something lightweight, like a simple Node.js application with a MongoDB instance, you might get away with just 2 GB of RAM. However, if you’re running a more comprehensive application with a React frontend and Express backend, allocating at least 4 GB would be a smarter choice to avoid performance bottlenecks.

After creating your virtual machine, I usually configure the networking options to bridge it with my local network. This way, I can access my applications as if they were running on my physical machine. You would typically want to set up External Network Adapter so that your VM has internet access. It’s crucial because you'll likely need to install various packages from npm and possibly connect to APIs while developing your application.

Once you have the VM set up, the next step is allocating your preferred operating system. I normally go for a server-oriented OS like Ubuntu Server, but you could opt for a different flavor based on your familiarity or the project requirements. I’ve found that using Ubuntu Server helps streamline the installation of necessary packages and dependencies. After the OS is up, you can SSH into it or use Hyper-V Manager’s console features.

You’ll want to install Node.js next. It’s a fundamental component of any Fullstack JavaScript application. If you’re going with Ubuntu, you can use the NodeSource binaries to get the latest version. I usually run these commands:


curl -fsSL https://deb.nodesource.com/setup_16.x | sudo -E bash -
sudo apt-get install -y nodejs


You want to ensure you have npm installed, too, since it comes along with Node.js. For a Fullstack app, you might be interacting with various libraries like Express for the backend and maybe React or Vue on the frontend.

I often turn to MongoDB as a database manager and find it fits well with my JavaScript stack. This can be simply installed with:


sudo apt-get install -y mongodb


With the database installed, the next step involves configuring it. You'll need to ensure MongoDB is set to run upon startup. I enable it with:


sudo systemctl enable mongodb
sudo systemctl start mongodb


It's essential to make sure that your MongoDB instance is reachable from your Node.js server. If you have a firewall, you would need to allow connections on the default MongoDB port, 27017.

From this point, you can scaffold your Node.js application. I often set up the backend first. You can use the Express generator to set up a basic backend structure. After navigating to your desired directory, you can execute:


npx express-generator my-app
cd my-app
npm install


This generates a skeleton Express application. You’ll probably want to modify the default routes to fit your application's requirements. The structure usually includes folders for routes, views, public assets, and a basic setup for middleware. I find that structuring your application cohesively while you're building is crucial for easier management down the line.

To integrate a frontend framework like React, this can be done either within the same directory of the Express app or in a separate frontend directory. I’ve used the create-react-app tool multiple times for setup, and it’s usually just:


npx create-react-app my-frontend
cd my-frontend
npm start


Here’s where things can get interesting because now you have two servers running: the Express API on one port (usually 3000) and the React application typically running on 3001. Cross-Origin Resource Sharing will need some attention if these need to communicate with each other seamlessly.

Express middleware can be applied quickly to handle CORS. I usually install the cors package:


npm install cors


Then, within your Express app, integrating it is straightforward:


const cors = require('cors');
app.use(cors());


Now that both your backend and frontend are set up, you might want to connect them. You can do this by fetching data from your Express backend in your React application. Generally, I make use of axios or fetch for API calls. A simple API request in the frontend could resemble:


import axios from 'axios';

useEffect(() => {
axios.get('http://localhost:3000/api/mydata')
.then(response => {
console.log(response.data);
});
}, []);


With everything set up, your application should now be running smoothly. You can also access it from your local network, provided you’ve got the IP address of your VM. If you ping that IP from a browser, it should direct you to your React frontend, which interacts with your Express backend seamlessly.

When developing, keeping an eye on logs is essential for troubleshooting. I find that both the Node.js console logs and React’s development server logs can provide insightful information. Making use of tools like Postman to test your API endpoints while they’re in development is another tip; this has saved me time tracing down bugs in the past.

After your development gets into production, concerns begin to switch towards how to manage your deployments effectively. In this case, you'll need to consider containerizing your applications, which can be done using Docker. Although Hyper-V is a great environment for running a Fullstack JavaScript app, using Docker can abstract the complexity of managing individual dependencies by packaging your application with its complete set of dependencies and settings.

If you're interested in deploying to a cloud platform like Azure or AWS, using Docker simplifies the process of creating instances and passing around images. The trick is to write a Dockerfile that encapsulates your application stack, allowing it to build consistently, regardless of where it's deployed.

A sample Dockerfile for a Node.js application could look like:


FROM node:16

WORKDIR /app

COPY package*.json ./

RUN npm install

COPY . .

EXPOSE 3000

CMD ["node", "server.js"]


You’d build the image with:


docker build -t my-app .


And run it with:


docker run -d -p 3000:3000 my-app


This abstracts away a lot of the complexity that comes with handling different environments.

When it comes to backup and recovery solutions for running your applications in Hyper-V, BackupChain Hyper-V Backup is worth mentioning. BackupChain offers comprehensive options for backing up virtual machines, with features that include incremental backups, scheduling, and the ability to manage these backups efficiently. It supports many backup types and ensures that your virtual environment remains recoverable after an incident.

Incorporating systems for monitoring, logs, and error reporting in your applications becomes essential as you go from development to production. Application Performance Monitoring tools such as New Relic or Datadog give you insights into how users interact with your services, how much load your server is under, and alerting when things go awry.

I’ve also configured CI/CD pipelines with tools like GitHub Actions, enabling automatic deployments once I’ve merged code into the main branch. Such automation can speed up testing and deployment cycles, and when done right, it takes the burden off manual intervention, reducing human error.

The Hyper-V setup alongside a Fullstack application development gives you a lot of flexibility and control over your applications. Besides, the ease of creating snapshots in Hyper-V adds a level of confidence while you explore new features or the addition of new packages.

Deleting or reverting to a previous version helps mitigate issues when integrating with new technologies or libraries. This rollback feature is instrumental, especially in a dynamic development environment where change is frequent.

In summary, managing a Fullstack JavaScript application inside Hyper-V relies heavily on your setup and configuration from the start. Having a structured flow using Docker, monitoring, and deployment pipelines, in addition to keeping good backup practices through solutions like BackupChain, can set you up for success and mitigate potential risks in your application lifecycle.

Introducing BackupChain Hyper-V Backup
BackupChain Hyper-V Backup Hyper-V Backup provides features like incremental and differential backups, ensuring that your virtual machines are captured at specific restore points without excessive resource consumption. The scheduling features allow automated management of backup tasks, reducing the burden of manual interventions. With support for large data and quick recovery options, BackupChain can efficiently assist in maintaining the durability of virtual environments.

Philip@BackupChain
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Joined: Aug 2020
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