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C H R I S M I T C H E L L
P R O G R A M M E R A N A L Y S T
E & J G A L L O W I N E R Y
@ M O T O B R E A T H
G I T H U B . C O M / M O T O B R E A T H
B L O G . C H R I S M I T C H E L L O N L I N E . C O M
C H R I S @ C H R I S M I T C H E L L O N L I N E
Lambda Lambda Lambda!

Lets Go Over
? What is Lambda & the Lambda dashboard?
? Versioning with Lambda qualifiers
? Lambda Layers
? Local Development

PRE-REQ��S
? AWS Account
? CLI == Dashboard
? Demo using dashboard, all commands available with CLI
? CLI demo at https://blog.chrismitchellonline.com
? Local development will require AWS CLI and SAM
installed

What Is Lambda
? Run code in the cloud
? Operating system �C Amazon Linux
? AMI �C amzn-ami-hvm-2017.03.1.20170812-x86_64-
gp2
? Linux kernel �C 4.14.77-70.59.amzn1.x86_64
? Docker container the whole thing
? AWS SDK for JavaScript �C 2.290.0
? SDK for Python (Boto 3) �C 3-1.7.74 botocore-1.10.74

New Lambda Function
? Login via https://aws.amazon.com/console/
? Find Lambda Dashboard
? Create new function
? Use defaults, create new role for function
? Roles
? Create new role
? Existing roll

Lambda Dashboard
? Designer Section
? Integrate Lambda, Layers, Logs, architect your function
? Triggers (Event sources)
? Code
? Write code��
? Environment Variables
? Incorporate environment variables in
? Memory
? Tagging
? More..

Testing Functions
? Test events should match the event that your
function would run from
? Example: API gateway sends video game data
? Configure test events and test function
? Create test events to run your function in the dashboard
? Essentially a ��run your code�� trigger

Demo
? Enough talk, lets setup a function and see a
dashboard
? Setup a test event
? Run code!

Versioning
? Multiple versions of Lambda code
? Separate DEV/ACC/Prod environment
? Lambda Qualifiers
? Manage what aliases run what code
? Versioning locks in function settings, unable to
change code
? Must change things like memory and environment at
root function level

Creating All Those Things
? Create a new version of our Lambda function code,
will be version 1
? Create 3 aliases, dev,acc,prod, point each of those
aliases to version 1
? Use $LATEST for active development
? Deploy new version of the code, version 2
? Point aliases accordingly.
? Check Qualifiers menu to see where aliases point

Demo Again
? Setup versions for our function

Layers
? Pull custom code into your Lambda function
? Most useful with NPM libraries
? Custom NPM libraries to boot
? Salesforce NPM package
? Reusable across all Lambda functions

Setup Layer
? Setup code locally using NPM install
? Directory structure must match:
? -name_of_layer
-node_js
-npm_modules
-package.json
-index.js
? Zip up directory so your zip file contains node_js

Lambda Layers Dashboard
? Create new layer
? Name, description, license, runtime
? Upload zip
? Set Runtime
? Attach layer to function
? Use the code!

Demo Layers
? See it in action

Local Lambda
? Develop locally, upload code, run in cloud
? Good for large (or all!) functions
? Upload zip directly to Lambda
? Function code section, change dropdown from Edit code inline
? ~10mb upload limit
? Upload zip to S3, load from there
? Better for larger functions
? With Lambda layers we don��t have to include NPM!
? NPM install locally, exclude from zip

Local Lambda with SAM
? AWS Serverless Application Model
? Uses Docker container to simulate running Lambda locally
? Local debugging and testing
? VS Code integration for debugging
? Breakpoints, stepping through code
? Use test events to trigger function similar to Lambda
dashboard

Local Lambda Components
? Install Docker and AWS CLI/SAM
? Create template.yml to define your functions
? One template.yml for many functions
? Define resources and outputs, 1-1 mapping to generate
function calls

? Create debugging config in VS Code
? Add debug configuration -> dropdown -> add new
configuration
? Config type is nodeJS
? See repo for launch.json
? One configuration item per function, matches 1-1 with
template.yml entries

Local Lambda Components Continued
? Test event
? JSON file that matches test events from either dashboard or
other AWS triggers
? One test event per function
? Layers
? Layers available either locally (folder)
? ARN from AWS account
? Configure in template.yml
? Bring it together: SAM->template.yml -> VS Code
debug config -> test event

Running Lambda Locally
? From the command line use SAM to trigger your
function
? Can run with or without the debugging
? Use debugging flag --debug-port 5858 to connect to debugger
? Without debug flag will execute your function similar to
running in the dashboard
? sam local invoke LocalLambda -e test-
events/videogames.json --debug-port 5858

Debugging
? If running with --debug-flag 5858 connect VS Code
debugger
? Debug menu -> select debug configuration -> Play
? One to one map with template.yml
? Breakpoints will stop code
? Step in/over code
? Evaluate Watch, Call Stack, and Debug console

Debug All the Things Demo
? Run Lambda code locally with Debug

In Closing
? More Lambda features
? Applications
? Monitoring
? Code Deploy
? Create triggers to use Lambda functions in other
AWS services

Thanks!
? Drop me a line:
? chris@chrismitchellonline.com
? Twitter: @motobreath
? Github: https://www.github.com/motobreath
? �ݺ�ߣs will be here!
? Blog: blog.chrismitchellonline.com

�ݺ�ߣ

Lambda lambda-lambda

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