{"componentChunkName":"component---src-templates-posts-js","path":"/videos","result":{"data":{"allContentfulPost":{"edges":[{"node":{"slug":"how-to-deploy-a-resilient-node-js-application-on-kubernetes-from-scratch","title":"How To Deploy a Resilient Node.js Application on Kubernetes From Scratch","image":{"file":{"url":"//images.ctfassets.net/xmu5vdhtphau/44TWUox1PIcIbFcVRUqVgv/18202864f4be6db2a4352e498e6629ca/maxresdefault__1_.jpg","fileName":"maxresdefault (1).jpg"}},"bodyContent":{"childMarkdownRemark":{"html":"

This post was first published in Digital Ocean blog post.

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You may have heard the buzz around Kubernetes and noticed that many companies have been rapidly adopting it. Due to its many components and vast ecosystem it can be quite confusing to find where the path starts to learn it.

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In this session, you will learn the basics of containers and Kubernetes. Step by step, we will go through the entire process of packaging a Node.js application into a Docker container image and then deploying it on Kubernetes. We will demonstrate scaling to multiple replicas for better performance. The end result will be a resilient and scalable Node.js deployment.

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You will leave this session with sufficient knowledge of containerization, Kubernetes basics, and the ability to deploy highly available, performant, and scalable Node.js applications on Kubernetes.

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Resources

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View the slides for this talk

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Transcript of The Commands and Manifests Used

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Be sure to follow along with the recording for an explanation and replace kamaln7 with your own DockerHub username.

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Node App

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    \n
  1. Create an empty node package: npm init -y
    2. \n
  2. Install express as a dependency: npm install express
    3. \n
  3. index.js
    4. \n
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const express = require('express')\nconst os = require('os')\n\nconst app = express()\napp.get('/', (req, res) => {\n        res.send(`Hi from ${os.hostname()}!`)\n})\n\nconst port = 3000\napp.listen(port, () => console.log(`listening on port ${port}`))\n
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Docker

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    \n
  1. Dockerfile
    2. \n
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FROM node:13-alpine\n\nWORKDIR /app\n\nCOPY package.json package-lock.json ./\n\nRUN npm install --production\n\nCOPY . .\n\nEXPOSE 3000\n\nCMD node index.js\n
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    \n
  1. Build the image: docker build -t kamaln7/node-hello-app .
    2. \n
  2. Edit index.js and replace the word Hi with Hello.
    3. \n
  3. Re-build the image and notice Docker re-using previous layers: docker build -t kamaln7/node-hello-app .
    4. \n
  4. Run a container to test it: docker run --rm -d -p 3000:3000 kamaln7/node-hello-app
    5. \n
  5. Look at the running containers: docker ps
    6. \n
  6. Stop the container: docker stop CONTAINER_ID
    7. \n
  7. Push the image to DockerHub: docker push kamaln7/node-hello-app
    8. \n
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Kubernetes

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  1. Get worker nodes: kubectl get nodes
    2. \n
  2. Create a deployment: kubectl create deployment --image kamaln7/node-hello-app node-app
    3. \n
  3. Scale up to 3 replicas: kubectl scale deployment node-app --replicas 3
    4. \n
  4. Expose the deployment as a NodePort replica: kubectl expose deployment node-app --port 3000
    5. \n
  5. Look at the newly created service (and the assigned port): kubectl get services
    6. \n
  6. Grab the public IP of one of the worker nodes: kubectl get nodes -o wide
    7. \n
  7. Browse to IP:port to test the service
    8. \n
  8. Edit the service: kubectl edit service node-app
    9. \n
  9. Replace port: 3000 with port: 80
    10. \n
  10. Replace type: NodePort with type: LoadBalancer
    11. \n
  11. Verify that the service was updated: kubectl get service
    12. \n
  12. Run the above command every few seconds until you get the external IP address of the Load Balancer
    13. \n
  13. Browse to the IP of the Load Balancerhhuy
    14. \n
"}},"categories":[{"name":"Node.js","slug":"node-js"},{"name":"Containers","slug":"containers"}]}},{"node":{"slug":"webinar-the-end-of-monoliths-a-guide-to-backend-architecture-in-2020","title":"Webinar: The end of monoliths? A guide to backend architecture in 2020","image":{"file":{"url":"//images.ctfassets.net/xmu5vdhtphau/49RQOiTJCrILQmaTM9BZDT/b5a09b357e0702310032d2190818b1b5/maxresdefault.jpg","fileName":"maxresdefault.jpg"}},"bodyContent":{"childMarkdownRemark":{"html":"

You can’t build a stable backend without solid architecture. And without proper backend, you can’t develop a good application. But what does stable backend mean? How to keep up with all the architectural trends in an ever-changing, fast-paced reality of the modern development? 📈

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Is monolithic architecture already dead? Should you or your team focus on practicing the use of microservices? Is following the trends a good approach or should you rather lean on some thoroughly tested solutions? 🤔

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During our upcoming webinar, Adam Polak – Head of Node.js Team at The Software House, will guide you through the current backend architecture trends and solutions, indicating the most important (but not always obvious) issues that you should pay attention to. Here’s the excerpt from the extensive agenda:

\n\n

Subjects discussed during our event will be 100% based on real-life cases and experiences. Also, Adam will answer your questions during a Q&A session after the webinar. The whole event will last for approximately an hour.

"}},"categories":[{"name":"Node.js","slug":"node-js"},{"name":"How To","slug":"how-to"}]}},{"node":{"slug":"need-to-node-volume-68","title":"Need to Node – Volume 68","image":{"file":{"url":"//images.ctfassets.net/xmu5vdhtphau/1VFb7mEzU2R797phntgeEx/6ac3fa7b021718963eebb1cedfb8c2f4/Screen_Shot_2020-07-14_at_12.53.39_PM.png","fileName":"Screen Shot 2020-07-14 at 12.53.39 PM.png"}},"bodyContent":{"childMarkdownRemark":{"html":"

In this volume of Need to Node, you can find the latest news on Node.js, our announcement of Node.dev and some information about our Open JS presentation ‘Behind the Scenes of NodeSource Node.js Binary Distributions'.

\n

Need to Node is a weekly bulletin designed to keep you up-to-date with the latest news on the Node.js project, events and articles. You are always welcome to collaborate and participate. Please let us know if we missed a piece of content you think should be included!

\n

What’s New in the Node.js Project

\n\n

Awesome Articles, Links, and Resources

\n\n

One Last Thing...

\n

If you find any Node.js or JavaScript related content over the next week (or beyond!), never hesitate to reach out to us on Twitter at @NodeSource to share and get it included in Need to Node - our DMs are open if you don’t want to share publicly!

"}},"categories":[{"name":"Community","slug":"community"},{"name":"Need To Node","slug":"need-to-node"}]}},{"node":{"slug":"behind-the-scenes-of-node-js-distributions","title":"Behind the Scenes of Node.js Distributions","image":{"file":{"url":"//images.ctfassets.net/xmu5vdhtphau/2Gg9gojD25JeSrDCBUfWfV/065fbdcc26d9dd6b41c993d5a9d47cdf/Screen_Shot_2020-06-23_at_9.39.22_AM-min.png","fileName":"Screen_Shot_2020-06-23_at_9.39.22_AM-min.png"}},"bodyContent":{"childMarkdownRemark":{"html":"

If you are installing Node.js in Linux to use it in production, there is a big chance that you are\nusing NodeSource Node.js Binary Distributions.

\n

In this talk you can find the process in which NodeSource Node.js Binary Distributions is updated, how new versions are supported, the human and infrastructure process, and some limitations of maintaining the channel. Also and most importantly, how the community can get involved with this project.

"}},"categories":[{"name":"Node.js","slug":"node-js"},{"name":"Community","slug":"community"}]}},{"node":{"slug":"need-to-node-vol-67","title":"Need to Node vol. 67","image":{"file":{"url":"//images.ctfassets.net/xmu5vdhtphau/35sx50sOW4VhQo6S0WsM3w/14ce79dbe14b8592d9c564f502e65c9a/1-min.png","fileName":"1-min.png"}},"bodyContent":{"childMarkdownRemark":{"html":"

In this volume of Need to Node, you can find the latest news on Deno, a recording of our webinar ‘New and Exciting Features to Land in Node.js version 14’ and ‘JavaScript features to forget’.

\n

Need to Node is a weekly bulletin designed to keep you up-to-date with the latest news on the Node.js project, events and articles. You are always welcome to collaborate and participate. Please let us know if we missed a piece of content you think should be included!

\n

What’s New in the Node.js Project

\n\n

Awesome Articles, Links, and Resources

\n\n

One Last Thing...

\n

If you find any Node.js or JavaScript related content over the next week (or beyond!), never hesitate to reach out to us on Twitter at @NodeSource to share and get it included in Need to Node - our DMs are open if you don’t want to share publicly!

"}},"categories":[{"name":"Community","slug":"community"},{"name":"Node.js","slug":"node-js"}]}},{"node":{"slug":"new-features-nodejs-version-14","title":"New and Exciting Features to Land in Node.js Version 14","image":{"file":{"url":"//images.ctfassets.net/xmu5vdhtphau/4HIwVhFjrKrBmds10NlfeW/4193d762cccd04afeef8b9baba8ce772/1-min.png","fileName":"1-min.png"}},"bodyContent":{"childMarkdownRemark":{"html":"

Node.js 14 has just been released. It comes with full of new features and enhancements. More importantly, it will be promoted to Long-Term Support in October, so now it's the moment to start testing our applications and try the new features to ensure a smooth transition.

\n

In this webinar we will be showing the most relevant of these new features.

"}},"categories":[{"name":"Node.js","slug":"node-js"}]}},{"node":{"slug":"need-to-node-volume-66","title":"Need to Node – Volume 66","image":{"file":{"url":"//images.ctfassets.net/xmu5vdhtphau/47M1ZCRvNDb4uYnCpN89QG/ec93803c06da2a34b1bc40514c107497/3-min.png","fileName":"3-min.png"}},"bodyContent":{"childMarkdownRemark":{"html":"

In this volume of Need to Node, you can find the latest news on Node.js’s version 14 Release, Diagnostics in Node.js and The Cost of JavaScript Frameworks

\n

Need to Node is a weekly bulletin designed to keep you up-to-date with the latest news on the Node.js project, events and articles. You are always welcome to collaborate and participate. Please let us know if we missed a piece of content you think should be included!

\n

What’s New in the Node.js Project

\n\n

Awesome Articles, Links, and Resources

\n\n

One Last Thing...

\n

If you find any Node.js or JavaScript related content over the next week (or beyond!), never hesitate to reach out to us on Twitter at @NodeSource to share and get it included in Need to Node - our DMs are open if you don’t want to share publicly!

"}},"categories":[{"name":"Community","slug":"community"},{"name":"Node.js","slug":"node-js"}]}}]},"contentfulHero":{"headLine":"Find the latest and most relevant news, talks, and webinars in the Node.js ecosystem","coverImage":{"file":{"url":"//images.ctfassets.net/xmu5vdhtphau/3cgmOaKTQ3Ib9QvyzEm6Yv/1b801885c841fbd7ff9a67cf14e128fa/video-min.jpg","fileName":"video-min.jpg"}}}},"pageContext":{"limit":7,"skip":0,"numPages":2,"currentPage":1,"type":"video","hero":"hero-videos","prevPath":"","nextPath":"/videos/page/2"}}}