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

• slides.com/davidfekke/serverless
• github.com/jaxnode-UG/serverless-crud