Serverless

JaxNode Oct 2016

Node News

  • Node 7 coming soon
  • Node 6 now moved into LTS with 4
  • Yarn released

November

Redux

Yarn

  • JS Package Manager
  • From Google, Facebook and others
  • Security
  • Performance
  • Offline Cache

NPM

npm install

npm install lodash --save

npm uninstall lodash --save

npm install babel -g

npm update --save

Yarn

yarn

yarn add lodash

yarn remove lodash

yarn global add babel

yarn upgrade

Cool features

  • yarn licenses ls
  • yarn licenses generate
  • yarn why lodash

Yarn Demo

Servers

Hosting Applications

  • Run locally
  • Deploy to Server (in a data center hopefully)
  • On Premise
  • Co-Location in rack space
  • Cloud Hosting (Rackspace, CenturyLink)
  • PAAS (AWS EC2, Azure, Bluemix)
  • Container hosting
  • Serverless (Lambda, Azure Functions)

Tenets of Serverless

  • Composed of many services
  • Sometimes called micro-services
  • May have less than 200 lines of code
  • One function per service
  • Logging important!!!

AWS Lambda

  • Written in JS, Java or Python
  • Bound to events or HTTP requests
  • 128 MB RAM Default per function
  • Monitor logging with CloudWatch

Azure Functions

  • Azure version of AWS Lambda
  • Similar model
  • NPM install modules through console

Advantages of Serverless

  • Lowest Cost hosting
  • Simple development model
  • Simple deployment
  • Don't have to worry about load scheduling
  • Scales automagically

$0.20 per 1 million requests

Disadvantage of Serverless

  • Local development a challenge
  • No NPM Support (Azure has NPM)
  • Debugging threw logging

Ocean Disc example

 

  • Mobile app had to store reports
  • Upload to S3 storage
  • Process files based on upload event
  • Call REST based service
  • Accomplished threw AWS Lambda

Serverless Framework

  • Formerly Called Jaws
  • Currently AWS only
  • Build entire apps from Lambda
  • Organize Lambda functions
  • Local development and testing
  • resource management (APIs and Databases)
  • Multi-region development

method signature

module.exports.hello = (event, context, callback) => {
  const response = {
    statusCode: 200,
    body: JSON.stringify({
      message: 'Hello World!',
      input: event,
    }),
  };

  callback(null, response);
};

Serverless CLI

  • $ sls create --template aws-nodejs
  • $ sls deploy
  • $ sls deploy --function functionName
  • $ sls invoke --function functionName
  • $ sls logs -f hello
  • $ sls info

Demo

Questions?

Resources

Serverless

By David Fekke

Serverless

These are the slides for the October 2016 Serverless presentation at the JaxNode User Group

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