Serverless and Lambda
If you’ve just landed here, we’re doing a “Become a Cloud Architect” Unicorn Workshop by building a Unicorn Pursuit Web App step by step, and you’re more then welcome to join!
About Serverless
Basically, the evolution started from Data Center, and then evolved into:
- IaaS
- PaaS
- Containers
- Serverless!!! Hello Lambdas!
Why is Serverless so popular?
- No servers or databases to operate.
- So much cheaper.
- Super elastic / scalable.
Lambda
Fully managed compute platform, where we can run our Code without managing Servers. Lambda is EVENT driven, and charged based on how long your code runs.
Cool: First MILLION requests are FREE, and 0.2 dollars per million requests starting from there.
You can run Lambda:
- As RESPONSE to EVENTS that trigger the execution. A trigger can be a change to S3 or DynamoDB data.
- As compute service to run your code as response to HTTP requests, using API Gateway, or API calls using AWS SDK.
Important:
- Lambda scales OUT.
- Lambdas can trigger other Lambdas.
- X-Ray is used to DEBUG Lambda. You can use Lambda across Regions.
Step Functions
- Great way to visualize a serverless app
- Automatically triggers and tracks each step
- Logs each step, for later troubleshooting
X-Ray
Collects data about requests your app serves. You can see detail info about everything your app is calling from other services.
X-Ray SDK provides:
- Inceptors, to add to your code
- Client Handlers, to instrument AWS SDK clients your app uses to call other AWS services.
- An HTTP client to use for other calls to internal and external HTTP services.
Code
Deep Dive
Where to find more info
Feedback
Was this page helpful?
Awesome! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.