#server

Getting down and dirty with metric-based alerting for #aws #lambda
▻https://hackernoon.com/getting-down-and-dirty-with-metric-based-alerting-for-aws-lambda-44dee79

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The phrase “better safe than sorry” gets thrown around whenever people talk about monitoring or getting observability into your AWS resources but the truth is that you can’t sit around and wait until a problem arises, you need to proactively look for opportunities to improve your application in order to stay one step ahead of the competition. Setting up alerts that go off whenever a particular event happens is a great way to keep tabs on what’s going on behind the scenes of your #serverless applications and this is exactly what I’d like to tackle in this article.AWS Lambda MetricsAWS Lambda is monitoring functions for you automatically, while it reports metrics through the Amazon CloudWatch. The metrics we speak of consist of total invocations, throttles, duration, error, DLQ errors, etc. You (...)

#aws-lambda #metrics-and-analytics

How to Build a Member App using Facial Recognition and #serverless
▻https://hackernoon.com/how-to-build-a-member-app-using-facial-recognition-and-serverless-ed33c3

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Using #aws #rekognition and serverless, we can build a scalable member management system to replace membership cards.This sample app is designed for clubs, gyms, museums (or even Costco )— any organization that has membership cards with a photo to gain access. With just a few serverless tools, we can develop a scalable, durable membership management system that uses facial recognition to keep track of members.The app allows an administrator to enroll faces in their organization, and then verify new faces against the known membership list. In traditional app development, this would be a major undertaking but in serverless it’s easier than you might think.The key takeaways in this project are that serverless lets us clearly delineate the front-end and back-end of a web-app, and by hooking (...)

#vuejs #aws-rekognition

What is #aws #lambda or #serverless ?
▻https://hackernoon.com/what-is-aws-lambda-or-serverless-f0a006e9d56c?source=rss----3a8144eabfe3

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AWS Lambda logoThere has been a lot of talk about serverless and AWS lambda these days. More and more companies and teams are switching towards the serverless architecture for their applications.In this article, I will be explaining serverless and we will be deploying our first hello world lambda function!What is Serverless?Serverless simply means that you don’t have to manage the servers on which your application runs.You don’t have to take care of patching the system, installing antivirus software or configuring firewalls. Also, you don’t have to worry about scaling your application as the load increases, it is handled automatically!Hence, it allows you to focus more on the functionality of your application.Why is it better?Normally, when you are creating a dynamic web application you (...)

#cloud #cloud-computing

How to Unwrap an AggregateException Thrown by #aws #lambda
▻https://hackernoon.com/how-to-unwrap-an-aggregateexception-thrown-by-aws-lambda-6652fd085952?so

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If you’ve written a .NET Lambda function which calls async code and returns either Task or Task<T>, you’ve probably seen an AggregateException which wraps the real exception.This example comes from the handler below which calls an asnyc method that always throws a FormatException.The AggregateException can be unwrapped, though. When AWS added .NET Core 2.1 support to Lambda, they also added an undocumented feature toggle. The only real mention of it is by the AWS .NET team on Reddit.When the UNWRAP_AGGREGATE_EXCEPTIONS environment variable is set to 1 or true, Lambda will call GetAwaiter().GetResult() instead of using theResult property.Note that this only works if your method returns Task or Task<T>.This causes the first exception thrown to be returned instead of an (...)

#dotnet-core #serverless #csharp

Chaos test your Lambda functions with Thundra
▻https://hackernoon.com/chaos-test-your-lambda-functions-with-thundra-48743fe98a91?source=rss---

Failures are inevitable. Just as we need to test our application to find bugs in our business logic before they affect our users. We need to test our application against infrastructure failures. And we need to do it before they happen in production. and cause irreparable damages.The discipline of Chaos Engineering shows us how to use controlled experiments to uncover these weaknesses.In this post, we will see how we can leverage Thundra’s span listeners to inject failures into our #serverless application. We will use these failures to expose weaknesses such as:Missing error handler for DynamoDB operations.Missing fallback when the primary data source is unavailable.Missing timeout on outbound HTTP requests.But first, here’s a quick primer on Thundra.Hello, Thundra!Consider an API with two (...)

#lambda-function #aws #cloud-computing #aws-lambda

You Might Not Need Server Side Rendering
▻https://hackernoon.com/you-might-not-need-server-side-rendering-f2681e02e4e?source=rss----3a814

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The Displaced Universal #react Web App in a #serverless FutureTaco Lost in the AbyssIt’s easy to get lost in the labyrinth of choices when building a web app these days. I jumped on the “universal” bandwagon (back when it was called “isomorphic”) early and have many learned lessons since.A universal app is one that can execute the same code universally — on the server and client. React provides ways to render components to static markup as documented in the official docs, typically used on a Node server. This support revolutionized the way many of us think of and write JavaScript. The practicality of scaling and maintaining such a mechanism however is questionable.Universal… Why?Beyond the ability to share code across the stack, why go universal? Some would say SEO (just that one word). I remember (...)

#universal-app #server-side-rendering #lighthouse

Better local development for #serverless Functions
▻https://hackernoon.com/better-local-development-for-serverless-functions-b96b5a4cfa8f?source=rs

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Lambda is a terrific piece of kit for all the benefits listed on the #aws product page and Serverless is a very useful framework for developing Lambda functions. However, developing serverless applications locally is a total pain if what you’re solving isn’t totally trivial.When things get complicated and your Lambda functions start to integrate with other AWS services, things really begin to break down. There are a few things that look like silver-bullets, I’ll share them here and explain why they didn’t work for me, then give you a working example that I myself struggled to find(hence me writing this).LocalstackLocalstack is definitely the biggest attempt silver bullet here. Basically emulate a huge chunk of AWS locally and connect your serverless functions into that. Why I didn’t use  (...)

#serverless-functions #javascript #jest

Lambda optimization tip — enable HTTP keep-alive
▻https://hackernoon.com/lambda-optimization-tip-enable-http-keep-alive-6dc503f6f114?source=rss--

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Lambda optimization tip — enable HTTP keep-aliveI recently watched an excellent talk by Matt Levin on optimization tips for Lambda and saw a slide on making DynamoDB use HTTP keep-alive. It reminded me of a conversation I had with Sebastian Cohnen, so I set out to test the effect this simple optimization has.What is it all about?As it turns out, Node.js’s default HTTP agent doesn’t use keep-alive and therefore every request would incur the cost of setting up a new TCP connection. This is clearly inefficient, as you need to perform a three-way handshake to establish a TCP connection. For operations that are short-lived (such as DynamoDB operations, which typically complete within a single digit ms) the latency overhead of establishing the TCP connection might be greater than the operation (...)

#cloud #serverless #aws #cloud-computing #aws-lambda

Build and Deploy an #api with Standard Library and Node.js in 6 Easy Steps
▻https://hackernoon.com/build-deploy-and-publish-an-api-using-code-xyz-and-node-js-in-6-steps-8a

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APIs, the building blocks of software, run our world. They’re how software systems communicate with each other, and how we as people communicate with software. Knowing how to build an API is not only a crucial skill for a software developer, but a foundational part of general coding literacy — a skill that can help anyone in their career.In this tutorial, you’ll learn how to build an API directly from your web browser — no other tools required — using #code on Standard Library, the online API editor. Whether you’re new to software development or a veteran looking for faster ways to ship code, I’ll demonstrate how quickly you can build a working API with Code on Standard Library. We’ll use Code on Standard Library to build a fully functional SMS service that connects AscenDB’s Peaks API for (...)

#programming #serverless #nodejs

Deep Learning Software Setup: CUDA 10 + Ubuntu 18.04
▻https://hackernoon.com/deep-learning-software-setup-cuda-10-ubuntu-18-04-15548cefa30?source=rss

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Deep Learning Software Setup: CUDA 10 + Ubuntu 18.04 (Part 2 of a $4000 RTX 2080Ti (MSI) DL box series)Part 2 of getting our First Deep Learning BuildIn the previous writeup, I had given a brief walkthrough of the parts that I had picked for “Neutron” and about the reasons for getting it assembled from a third party retailer: “Ant-PC”.In this blog, I’ll share the step by step instructions that for setting up software on an #nvidia-based “Deep Learning Box”.Overview:For storage, I have 2 Drives:Samsung 970 Pro NVMe M.2 512GB2TB HDDMy retailer had been kind enough to install windows as per my request on a 500GB partition made on the HDD.Ubuntu 18.04 InstallationFor Neutron, I was going to have Ubuntu 18.04 installed on the M.2 drive with Swap space allocated on it as well, plus the extra space left (...)

#artificial-intelligence #machine-learning #deep-learning #servers

#analytics services. #serverless analytics
▻https://hackernoon.com/analytics-services-part-3-e3981e694f99?source=rss----3a8144eabfe3---4

Serverless and AWS Lambda how-toThis is the second part of our three-part story about analytical systems. Here you can find Part 1 which answers the questions about client analytics and Part 2 about classical server-side analytics implementation.In this part, we will continue telling you about server-side analytics, particularly about the implementation entirely based on cloud services. In the previous part we have listed the main steps of the implementation. These are:Data queryStream processingDatabaseAggregation serviceFront-endThe same applies here with the only difference in that each step is transferred to cloud services to the greatest extent possible. So, we will follow the main steps listed above in their original order trying to describe potential cloud option properties and (...)

#clickhouse #aws-kinesis #aws-lambda

#serverless #computing — The Truth behind the New Business Trend
▻https://hackernoon.com/serverless-computing-the-truth-behind-the-new-business-trend-7426c9fa310

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Serverless Computing — The Truth Behind the New Business TrendCloud computing has evoked a new hope among enterprises and businesses. Most of the entrepreneurs (including me) have begun to worry less about IT infrastructure. Well, all thanks to the Cloud!At present, serverless computing is the most-talked-about topic in this context. In Google Trends, we saw a huge spike in web searches on serverless architecture. A minimum of 100 web searches on serverless architecture occurs on a daily basis.So, why is there a sudden interest in serverless computing? Is it just a fad or indeed a game-changer?Let’s have a close look!What is Serverless Computing?To newbies, the term serverless would probably shock them. Does this mean there are no servers? Yes, and no. In such an architecture, your (...)

#cloud-services #serverless-computing #serverless-tech

The Great #serverless Cost Debate(Serverless! = Costless)
▻https://hackernoon.com/the-great-serverless-cost-debate-serverless-costless-1a0b6c07cacb?source

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Source: skitterphoto.comIf you’re worried about switching to a serverless framework being too expensive for your business, you’re not alone. Total spending on cloud services will top $411 billion by 2020. The good news is there are many ways to track and lower the costs of your serverless operation without slowing down your business.So what is AWS Lambda and how can it help your business? Find out more by reading these frequently asked questions.Working with AmazonAWS meaning Amazon Web Services is Amazon’s cloud computing business. AWS serverless is just going into its fifth year in use.Because outsourcing computing power is still so new, it still has many tech workers asking, “What is serverless?” How could using someone else’s servers be efficient or cost effective? Let’s talk about the (...)

#serverless-costless #aws-lambda #analysis #serverless-cost-debate

WebSockets & #api Gateway
▻https://hackernoon.com/websockets-api-gateway-9d4aca493d39?source=rss----3a8144eabfe3---4

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A quick, hands-on demo2018 was the year I won many imaginary arguments about why a #serverless #websocket API Gateway will never work. I was wrong.Before I atone, let me explain: serverless patterns work best when state is separated from execution logic, but I argued that the two are inseparable in real-time applications, pertaining to connection state. So when the API Gateway team announced WebSocket support at re:Invent, I was eager to learn more.Let’s refactor a simple real-time app into a serverless real-time app and deploy it to a WebSocket API Gateway.Hello HelloWe begin with a simple NodeJS client that talks to wss://echo.websocket.org:▻https://medium.com/media/2581597a559d33a586ba0907acd384b8/hrefI’ve also prepared a demo repo:git clone ▻https://github.com/robzhu/ws-demoscd (...)

#api-gateway #websockets-api-gateway

How Cloud Services Can Aid in Agile Product Development
▻https://hackernoon.com/how-cloud-services-can-aid-in-agile-product-development-82d14d0d52f8?sou

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Introduction to AgileAgile methodology is a form of software development methodology where the entire focus is on providing client satisfaction through the process of continuous delivery. There was a time when the waterfall methodology was the golden standard for software development, but this process had its cons and when agile was introduced, it became widely appreciated over time.Agile processes were based on sustainable development, where stakeholders, developers, and customers were equally benefited, and were able to work at a constant pace. The frequent collaboration with stakeholders, closely working team members, and the possibility to embrace change late in the project has made Agile popular among teams. Going through the Agile Manifesto would give you an idea of the set of (...)

#product-development #agile-development #cloud-services #serverless #microservices

Let’s Examine the Future of #serverless
▻https://hackernoon.com/serverless-future-dbb2e8b38ad3?source=rss----3a8144eabfe3---4

Let’s start with a million dollar question: Can serverless live up to the expectations?The answer decides and informs the strategies of many organizations.This post answers the question using “Emerging Technology Analysis Canvas (ETAC),” a framework built to analyze emerging technologies. What is ETAC? It is a set of questions that probe the technology arranged around a logical narrative. It represents different aspects of technology visually on a single page. The visual representation is concise, compact, and comprehensible in a glance.The following canvas depicts serverless analysis. The canvas is read from left to right and top to bottom.Following is a 10,000-foot outline of the canvas. For detailed analysis, please refer to Serverless Technology Outlook.At the top-leftmost cell, the (...)

#software #programming #cloud #software-development

Making Sense of #azure Durable Functions
▻https://hackernoon.com/making-sense-of-azure-durable-functions-645ecb3c1d58?source=rss----3a814

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Stateful Workflows on top of Stateless #serverless Cloud Functions — this is the essence of the Azure Durable Functions library. That’s a lot of fancy words in one sentence, and they might be hard for the majority of readers to understand.Please join me on the journey where I’ll try to explain how those buzzwords fit together. I will do this in 3 steps:Describe the context of modern cloud applications relying on serverless architecture;Identify the limitations of basic approaches to composing applications out of the simple building blocks;Explain the solutions that Durable Functions offer for those problems.MicroservicesTraditionally, server-side applications were built in a style which is now referred to as Monolith. If multiple people and teams were developing parts of the same application, (...)

#azure-functions #azure-durable #azure-durable-functions

A crash course on #serverless-side rendering with #react.js, Next.js and #aws Lambda
▻https://hackernoon.com/a-crash-course-on-serverless-side-rendering-with-react-js-next-js-and-aw

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Not so long ago I started exploring server-side rendered single-page applications. Yeah, try saying that three times fast. Building products for startups has taught me SEO is a must if you want an online presence. But, you also want the performance SPAs can provide.We want the best of both worlds. The SEO boost server-side rendering provides, and the speed of a Single Page Application. Today I’ll show you all this while hosting it basically for free in a serverless environment on AWS Lambda.TL;DRLet’s run through what this tutorial will cover. You can skim through and jump to the section that interest you. Or, be a nerd and keep reading. whisper Please be a nerd.What’re we building?Configure and install dependenciesBuild the app with the Serverless Framework and Next.jsDeploy the app to (...)

#aws-lambda #nodejs

A crash course on #serverless with #aws — Running Node.js 11 on Lambda
▻https://hackernoon.com/a-crash-course-on-serverless-with-aws-running-node-js-11-on-lambda-6ac67

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A crash course on Serverless with AWS — Running Node.js 11 on LambdaQuite an exciting title, isn’t it? I was hyped when I heard AWS was adding support for custom runtimes and layers for AWS Lambda. This means you can now build your own custom artifacts, enabling you to share and manage common code between functions.I won’t say I fainted when I heard the announcement. But, I did. Don’t tell anybody.What’ll we be doing?This article will show you how to hook up a custom Node.js 11 runtime to AWS Lambda. We’ll create a simple Serverless project with a sample function, and add a layer that will enable us to run the Node.js 11 runtime.How it worksTo use a custom runtime, you have to specify that you’re providing one when deploying your function. When the function is invoked, AWS Lambda will bootstrap (...)

#serverless-with-aws #aws-lambda #nodejs

Move over #devops — Hello JEFF/NoOps
▻https://hackernoon.com/move-over-devops-hello-jeff-noops-d194f01df002?source=rss----3a8144eabfe

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Move over DevOps — Hello JEFF/NoOpsDevOps is the seamless union of developers and operations working as one to facilitate high speed-to-market. It can be considered the approach of applying Lean or Agile to principles to infrastructure and operations. It breaks down silos within organisations and enables teams to move at a much greater pace to deliver software at scale.“[DevOps is] a cross-disciplinary community of practice dedicated to the study of building, evolving and operating rapidly-changing resilient systems at scale.” — Jez HumbleIn many organisations, DevOps is still massively misunderstood with dedicated departments clinging onto those silos under the gise of DevOps. For those that have been successful in removing those silos, get ready because the game is already changing.Whereas (...)

#cloud-computing #serverless #software-engineering #digital-transformation

How to Free #aws Lambda Code Storage (CodeStorageExceeded)
▻https://hackernoon.com/how-to-free-aws-lambda-code-storage-codestorageexceeded-4b7e81c2d575?sou

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You are already up and running with AWS Lambda for several months, and all of a sudden you get the following error:An error occurred: TestDashdeliveryLambdaFunction — Code storage limit exceeded. (Service: AWSLambda; Status Code: 400; Error Code: CodeStorageExceededException; Request ID: 05d3ae68-e7f6–11e8–948e-41c27396380e).What’s the problem?AWS limits the amount of “code storage” it saves on their internal S3 for Lambda functions of up to 75GB.Although it sounds like a lot of space, you can easily reach that limit. In case you’re using the #serverless Framework, its default is to store a version for every deployment you make.Solving the issueIf you don’t need to store a version for each deployment (like many of us), you can easily cancel it with the following addition to your serverless.yml (...)

#lambda-code-storage #aws-lambda-code-storage #aws-lambda

Digital Agency Shares the Benefits of Building a Static Website
▻https://hackernoon.com/digital-agency-shares-the-benefits-of-building-a-static-website-9e7c03e3

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Static sites are a big hit today. There are many advantages to having your website static, mainly performance and security. But will static sites stand the test of time? What is the real experience of developing and maintaining a static site? And how does it stand compared to dynamic websites built with traditional CMSs like Wordpress? I had a privilege to talk with Adam Judd, Managing Director of DiscoverIT, which is a UK based digital agency with a core focus on digital, about how they redesigned their own site using JAMstack methodology. That includes Vue.js framework, Nuxt.js static site generator and a headless CMS Kentico Cloud.Ondrej: Adam, I know you had an existing website that you decided to redesign. Can you explain your motivation?Adam: Our original site was built on a (...)

#vuejs #web-development #static-site #serverless #nuxtjs

Getting started — Quebic FaaS Framework
▻https://hackernoon.com/getting-started-quebic-faas-framework-c05ca0e13e08?source=rss----3a8144e

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Hi Today I am going to introduce Quebic - FaaS Framework. Quebic provides way to write server-less functions to run on #kubernetes. It supports for Java, Python, #nodejs runtimes.The key difference between Quebic and existing FaaS frameworks is, With Quebic you can develop highly available back-ends to serve real-time and also supports to execute on-demand tasks. Most of the existing FaaS frameworks are most suitable only for executing on-demand tasks.Main TopicsPrerequisitesHigh Level Overview of QuebicSetup QuebicAPI GatewayFunctions1. PrerequisitesBefore start Qubic you need to setup Kubernetes cluster. There are several ways. Here you can find more details.You can easily setup Minikube on your local machine that will gives single node Kubernetes cluster.Or you can use hosted solution (...)

#quebic-faas-framework #cloud-native #serverless

Cons of #serverless Architectures
▻https://hackernoon.com/cons-of-serverless-architectures-7b8b570c19da?source=rss----3a8144eabfe3

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A critical look at some of the potential drawbacks of serverless architecture that often get overlooked amidst the hype.Not really but you get the pointThe excitement and fanfare around ‘serverless’ — one of the industry’s favorite buzzwords — continues to grow. Numerous articles, books, and conferences have spun up a hype around serverless talking mostly about the benefits and innovative use cases that serverless enables.Source: Google Trends for Serverless 2016-2018But what about the downsides of Serverless? What are the current limitations that could require complex workarounds, sometimes outweighing the benefits? Amidst all the excitement and the lowered barriers to entry, many are quick to take the plunge without understanding the potential cons that require careful consideration to reap (...)

#cloud #aws-lambda #aws #serverless-architecture

Join the #NoServerNovember Challenge
▻https://hackernoon.com/join-the-noservernovember-challenge-622e36a83e2e?source=rss----3a8144eab

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It’s my favorite time of year; the holiday season is in full-swing, we’re preparing for Thanksgiving, and it’s #NoServerNovember. Our team here at #serverless launched #NoServerNovember this year to help serverless enthusiasts up level up and to help new users get started with serverless.Each week in November, we’re announcing new projects for you to try, along with great resources to complete the challenges. Each project you complete and tweet to us using the #NoServerNovember challenge enters you into a drawing to win some Serverless swag. So, try one project this month, tacked a new one each week, or take the title of serverless champion by finishing them all. We’ll be announcing winners all month long with grand prizes announced at the end of the month.The challengesThere are currently 9 (...)

#framework #development #aws-lambda #aws