無伺服器運算可讓您無需佈建或管理伺服器，即可建置及執行應用。您可透過無伺服器運算建置網頁、行動及物聯網後端、執行串流處理或大數據工作負載、運作聊天機器人，以及執行 Amazon Alexa 應用程式及其他。在本場專題演講中，您將了解如何上手使用 AWS Lambda 進行無伺服器運算，以便在不佈建或管理伺服器的前提下執行程式碼。另外也將介紹使用 Lambda 進行佈建作業的基礎知識，以及無伺服器功能對您的效益。本場專題演講還會解說如何運用 AWS Lambda 功能自訂 Alexa 的技巧知識。

1. © 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Simon Wang
Technical Account Manager, AWS Enterprise Support
June 7th, 2017
How to Use AWS Serverless Computing
to Develop Your First Voice Assistant

2. Agenda
• Why AWS Lambda?
• How Lambda works
• Hello, Amazon Alexa
• Demo

3. Why AWS Lambda?

4. Servers
How will the application
handle server hardware failure?
How can I control
access from my servers?
When should I decide to
scale out my servers?
When should I decide to
scale up my servers?
What size servers are
right for my budget?
How much remaining
capacity do my servers have?
(AAHHHHHHHHH!!)

5. Operations and management Scaling
Provisioning and utilization Availability and fault tolerance
Owning servers means dealing with ...

6. Key Differences Between Compute Offerings
VM Task Function
Service EC2 ECS Lambda
H/W OS Runtime
Unit of scale
Level of
abstraction

7. How Lambda works

8. AWS Lambda: Run code in response to events
FUNCTION SERVICES (ANYTHING)
Changes in
data state
Requests to
endpoints
Changes in
resource state
Node
Python
Java
C#
EVENT SOURCE

9. Amazon S3 Amazon
DynamoDB
Amazon Kinesis
AWS
CloudFormation
AWS CloudTrail Amazon
CloudWatch
Amazon Cognito
Amazon SNSAmazon
SES
Cron events
DATA STORES ENDPOINTS
CONFIGURATION REPOSITORIES EVENT/MESSAGE SERVICES
Example event sources that trigger AWS Lambda
… and a few more with more on the way!
AWS
CodeCommit
Amazon
API Gateway
Amazon
Alexa
AWS IoT AWS Step
Functions

10. Using AWS Lambda
Bring your own code
• Node.js, Java, Python,
C#
• Bring your own libraries
Simple resource model
• Select power rating from
128 MB to 1.5 GB
• CPU and network
allocated proportionately
Flexible use
• Synchronous or
asynchronous
• Integrated with other
AWS services
Programming model
• Use processes, threads,
/tmp, sockets normally
• AWS SDK built in
(Python and Node.js)

11. Automatic Scaling
• Each event is a Lambda request
• Lambda scales to match the
event rate
• Don’t worry about over or under
provisioning
• Pay only for what you use

12. Common Use Cases
Web
Applications
• Static
websites
• Complex web
apps
• Packages for
Flask and
Express
Data
Processing
• Real time
• MapReduce
• Batch
Chatbots
• Powering
Chatbot logic
Backends
• Apps &
services
• Mobile
• IoT
</></>
Amazon
Alexa
• Powering
voice-enabled
apps
• Alexa Skills
Kit
IT
Automation
• Policy engines
• Extending
AWS services
• Infrastructure
management

13. Hello, Amazon Alexa

14. What Can Alexa Do?

15. Alexa App and Skills
http://alexa.amazon.com

16. Introduce to Alexa Platform

17. Demo
Ask Alexa the Weather in Any City in Taiwan

18. How to Achieve It?

19. Technologies We Used
• Node.js and JavaScript
• AWS Lambda
• Amazon Alexa service and Alexa Skills Kit
(https://github.com/alexa/alexa-skills-kit-sdk-for-nodejs)

20. How to
Create an AWS Lambda Function

21. Code Snippet - weather.js
Publish this function for
fetching weather data
Invoke external WebService
Return weather info in TEXT

22. Code Snippet - lamdba.js
Include Alexa Skills Kit
Include weather.js module
Initial an Alexa handler
and register all handlers
Open Skill
Stop Skill
About weather
Recipe for pork
Say a joke

23. Code Snippet - lamdba.js – Cont.
Launch Skill function
Weather Intent function
Retrieve Slots (City Name)
Get weather information by
City Name
Speak out (emit)
weather information

24. Packing Node.js Function
#For MacOS
zip -r -q dist/lambda.zip ./ -x "FILE_OR_DIR_1" "FILE_OR_DIR_2"
AWS-SDK can be excluded!!

37. How to
Integrate Alexa Skill with Lambda

38. Amazon Developer Console (Portal)

41. Slot (City Name)

43. Demo
Updating Lambda Function

44. No servers to provision
or manage
Scales with usage
Never pay for idle Availability and fault
tolerance built in
Benefits of Lambda and Serverless Compute

45. AWS Lambda Pricing
• Charged by
• Request count
($0.2 per 1m requests)
• Compute
($0.00001667 per GB*second)
• Buy compute time in
100 ms increments
• No minimums fees
• No per-device fees
Free Tier
1 million requests and 400,000
GB*second of compute every month,
every customer
Example
• 256MB of memory
• Executed 3 million times per month
• It ran for 1 second each time
Around $6.2 per month!
https://s3.amazonaws.com/lambda-tools/pricing-calculator.html

46. Takeaways
• Serverless doesn’t actually mean that we have no
servers. It means that you don’t need to deal with them
anymore and focus on your business logic
• Many use cases can go Serverless computing
• Web, data processing, interactive backends, Chatbots, Alexa,
auto managing AWS resources
• Bots development on AWS is easy and agile
• Serverless ecosystem continues to grow
• Tooling, languages, and application capabilities

47. Thank you!

48. Next steps
1. Go to console.aws.amazon.com/lambda and create your first
Lambda function
2. Stay up to date with AWS Lambda on the Compute blog and check
out aws.amazon.com/lambda for scenarios and customer stories.
3. See https://aws.amazon.com/serverless for reference
architectures, samples, and links to more content.
4. Send us your questions, comments, and feedback on the AWS
Lambda Forums.