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INTRODUCTION TO
SERVERLESS
Based on examples featuring Serena Williams
Sara Gerion, Raquel Carvalho, Fernanda Machado
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▪ Understand what serverless means
Goals
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▪ Understand what serverless means
▪ The pros and cons of serverless
Goals
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▪ Understand what serverless means
▪ The pros and cons of serverless
▪ Use cases for serverless architectures
Goals
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▪ Understand what serverless means
▪ The pros and cons of serverless
▪ Use cases for serverless architectures
▪ Gain insights over serverless AWS services
Goals
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▪ Understand what serverless means
▪ The pros and cons of serverless
▪ Use cases for serverless architectures
▪ Gain insights over serverless AWS services
▪ Learn how to create an API using serverless services
Goals
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So what is serverless?
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Serverless is a
cloud computing execution model
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Infrastructure as a Service
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So if you want to start a business...
You now are able to choose between
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On-premises
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Cloud Service Providers
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AWS region eu-central-1 (Frankfurt)
https://infrastructure.aws/
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But hold on.
Doesn’t serverless suggest that
there are no servers involved?
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The word serverless is “misleading”.
There are actual servers powering your services.
But you don’t need to care about them.
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▪ It’s basically a code runner
▪ Your code is a function
▪ Cloud providers take care of almost everything else.
You just need to provide the code!
▪ Examples: AWS Lambda, Google Cloud Function,
Azure function
Function as a Services (FaaS) pattern
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If they are all serverless,
but have different purposes,
what do they have in common?
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Pros
Cost-effective
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Pros
Highly-scalable
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Pros
Resilient
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Pros
Logs and metrics “for free”
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Cons
You pay what you use...
So be mindful of the usage
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Cons
Hard limitations
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Cons
Some tricky implementation details
(read the docs!)
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What we will do today?
We will build a scalable, resilient
web app in very few steps.
Using only serverless services.
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What are we going to build?
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▪ Get your laptop, feel free to use the conference’s WiFi:
WiFi name: EWIT2019
WiFi password: wintechseries
▪ Go to:
https://github.com/sgdazn/introduction-to-serverless-workshop
▪ Follow the instructions in the readme located in the folder:
01_Console
Let’s start!
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Workshop time!
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Let’s recap
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▪ It is useful to build scalable, resilient services
▪ It’s cost effective (when applied smartly)
▪ It’s faster when you want to focus on the business
logic only
▪ AWS takes care of a lot of things, but read the
documentation!
What did we just learn about serverless?
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▪ Provisioning (CloudFormation, Terraform)
▪ Deploying (CI/CD pipelines)
▪ Being familiar with other useful services:
DynamoDB, S3, SQS, SNS...
What is next to learn?