Serverless Architecture
A Love Story!
Linda Nichols
@lynnaloo
Work @ Microsoft
Linda Nichols
@lynnaloo
Norfolk.js
norfolkjs.org
@lynnaloo
Today you're going to fall in love with Serverless Architecture...
But first, you have to break-up with your servers.
@lynnaloo
@lynnaloo
This story has all of the pieces of a typical romance:
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Break-ups and decoupling
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Commitment (and no-commitment)
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Highly cohesive relationships
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High availability and dedication
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Support and growth
But first, what is "serverless"* architecture?
@lynnaloo
* "Serverless" is just a catchy, made-up, marketing term.
(Kind of like, "Cloud")
@lynnaloo
Serverless Architecture?
It isn't about a platform or compute product...
@lynnaloo
Serverless Architecture?
It's about the events!
Serverless Architecture?
Serverless Architecture is an event-driven system that uses remote services (and likely a FaaS product) without concern for the operations of the environment where the code is executed.
@lynnaloo
@lynnaloo
Functions-as-a-Service (Faas)
Stateless functions running in execution environments managed by a service provider (not you!).
@lynnaloo
Functions-as-a-Service
FaaS is the heart of Serverless Architecture.
Functions-as-a-Service (FaaS)
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Fully-managed
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Stateless and ephemeral
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No worries about infrastructure
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Focus on the code
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Only pay when (if) you use
@lynnaloo
@lynnaloo
Your code could be completely free...
@lynnaloo
Functions-as-a-Service (FaaS)
@lynnaloo
AWS Lambda
Most popular kid in school
@lynnaloo
AWS Lambda
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First on the market
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Focus on performance and scale
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Runtime Layers
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Custom Runtimes
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Step Functions
@lynnaloo
Azure Functions
The Developer's Favorite
@lynnaloo
Azure Functions
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Open-source Runtimes
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Developer Tools/Plugins
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Offline Development
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Premier Tier
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Logic Apps and Event Grid
@lynnaloo
IBM Cloud Functions
They do really mean open
@lynnaloo
IBM Cloud Functions
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Backed by OpenWhisk
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Official runtimes for php and Swift
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Truly open, which helps with licensing issues
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Support for On-prem
@lynnaloo
Google Cloud Functions
Finally in GA!
@lynnaloo
Google Cloud Functions
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As of last summer, GA with Node.js and Python (Beta)
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Custom runtimes in the form of Cloud Run (new from Google Next)
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Great developer experience and quick out-of-the-box apps
Serverless Architecture
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Storage
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IoT
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Database Actions
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API Gateways
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Queues
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Logging
@lynnaloo
Functions can be triggered by other cloud services
Functions are Microservices
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One function, one function
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Lightweight and fast
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Reusable
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Independent deployments
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Work together to power applications
@lynnaloo
@lynnaloo
Did someone say decoupling?
@lynnaloo
Serverless Architecture
@lynnaloo
Your perfect match!
Serverless Architecture
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Dedicated
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Flexible
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Supportive
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Resilient
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Growth potential
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Speaks many languages!
What if I'm scared of commitment?
@lynnaloo
@lynnaloo
The cloud platforms do have analogous services...
Relationship Counseling
@lynnaloo
Embrace tools and frameworks!
Serverless Framework
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Open-source
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Supports various languages
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Abstracts provider-specific tasks
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Multi-provider plugin system
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Scaffold and deploy using CLI
@lynnaloo
What it looks like
# Install serverless cli
$ npm install serverless -g
# Create Azure Service
$ serverless create --template azure-nodejs --path cat-name-service
# Change into the service directory
$ cd cat-name-service
# Deploy to cloud provider
$ serverless deploy -v
cat-name-service/
package.json
serverless.yml
handler.js
dog-name-service/
package.json
serverless.yml
handler.js
@lynnaloo
Azure Functions Handler
'use strict';
const catNames = require('cat-names');
function getCatName(context, req) {
context.log('Getting a random cat name.');
context.done(null, { body: `Your cat name is ${catNames.random()}.` });
}
module.exports = getCatName;
(then package and/or deploy it!)
@lynnaloo
@lynnaloo
But what about the events?
@lynnaloo
@lynnaloo
Cloud Events
a specification for describing event data in a common way
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Azure Event Grid natively supports events in the CloudEvents JSON schema
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Serverless Framework's Event Gateway
Demo Time
@lynnaloo
Audience Participation!
@lynnaloo
Mention @thesecatstweet in a tweet with the hashtag #valentinebot
Valentine-Bot
@lynnaloo
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Twitter API for Node.js
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Scheduler service
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Storage
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FaaS Service
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Framework or Toolset
Azure Logic Apps
@lynnaloo
Thank You!
@lynnaloo
Serverless Architecture: A Love Story
By Linda Nichols
Serverless Architecture: A Love Story
A love story about Serverless Architecture. Presented to Philly ETE 2019 Conference.
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