This session shows how you can use AWS Lambda with Amazon CloudWatch to capture, monitor, analyse and run custom code on live actions and events across your entire AWS infrastructure. View webinar on demand here: https://www.brighttalk.com/webcast/9019/195165

1. © 2015, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Hosted by AWS Technical Evangelists, Danilo Poccia & Ian Massingham
AWS Mobile Web Day
24th March 2016
Follow AWS on Twitter at @AWScloud & AWS Mobile Services at @awsmobile

2. © 2015, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Best Practices: Infrastructure
Deployment and Monitoring with AWS
Lambda and Amazon SNS
Vyom Nagrani, Senior Product Manager, AWS Lambda

3. Amazon Simple Notification Service (SNS): publish
messages to multiple subscribers
• Follows the “publish-subscribe” (pub-
sub) messaging paradigm
• Group multiple recipients using topics
• Send to mobile device users, email
recipients or distributed services
• No upfront costs and pay as you go
pricing
Publisher
Subscriber
1
Subscriber
2
Subscriber
3
Subscriber
4
Amazon
SNS

4. Benefits of Amazon SNS for push notifications
“Fast, Flexible, Global Messaging to Any Device or Endpoint”
Global and Fast at Massive
Scale
Send billions of messages per
day with minimal latencies
across the world Use via Java, Python, PHP,
Node.js, or .NET
Support for Multiple Platforms or
Frameworks
Send Messages to Any Device or
Endpoint
Send Notifications via Mobile Push,
SQS, HTTP, Email, SMS, or
Lambda

5. AWS Lambda: A compute service that runs your code
in response to events
Lambda functions: Stateless, trigger-based code execution
Triggered by events:
• Direct Sync and Async invocations
• Put to an Amazon S3 bucket
• SNS subscription
• And many more …
Makes it easy to
• Build back-end services that perform at scale
• Perform data-driven auditing, analysis, and notification

6. High performance at any scale;
Cost-effective and efficient
No Infrastructure to manage
Pay only for what you use: Lambda
automatically matches capacity to
your request rate. Purchase
compute in 100ms increments.
Bring Your Own Code
“Productivity focused compute platform to build powerful, dynamic, modular
applications in the cloud”
Run code in a choice of standard
languages. Use threads, processes,
files, and shell scripts normally.
Focus on business logic, not
infrastructure. You upload code; AWS
Lambda handles everything else.
Benefits of AWS Lambda for building a server-less data
processing engine
1 2 3

7. Subscribe your Lambda functions to SNS topics
Customer
Systems
End-User Devices
(via AWS Mobile
SDK)
“Direct Publish”
publish (msg, endpointARN)
Topic
“A”
“Topic Publish”
publish(msg,topicArn)
APNSGCMADMWNS
Mobile Push Gateways
Amazon SQS Queues
HTTP Destinations
SMS (US Mobile Numbers Only)
Email
AWS Lambda Functions

8. Walkthrough of using an Amazon SNS message to
invoke AWS Lambda
Amazon
SNS
AWS Lambda Amazon
CloudWatch Logs
Publish
message to
topic

21. Attaching Lambda functions to Amazon SNS topic
subscriptions
• Multiple subscriptions: Subscribe multiple Lambda functions to same SNS topic
• For every subscribed function, each message to the SNS topic will invoke Lambda once
• Retries: For Amazon SNS, AWS Lambda retries each function at least 3 times
• Permission model: SNS pushes events to Lambda, so grant SNS invocation
permission through a resource policy, and add the execution role to Lambda
• Automatic Scaling: Lambda scales automatically with SNS publish rate
• Safety throttle of 100 concurrent Lambda functions, can be increased by AWS Support Center

22. Monitoring and Debugging Lambda functions
• Console Dashboard
• Lists all Lambda functions
• Easy editing of resources, event sources and other settings
• At-a-glance metrics
• Metrics in CloudWatch
• Requests
• Errors
• Latency
• Throttles
• Logging in CloudWatch Logs

23. Using SNS+Lambda for automated responses to alerts
(Infrastructure Monitoring and Deployment)
AWS
Lambda
Amazon
SNS
Amazon
CloudWatch Alarm
ec2
runInstance
ecs
startTask
beanstalk
updateApp
kinesis
splitShard
Any API call

24. Use cases of SNS+Lambda for Infrastructure
Monitoring and Automation
Input from CloudWatch Alarms
• EC2 metrics: CPU, Disk, Network, Health
• EBS metrics: Read/Write Bytes/Ops
• ELB metrics: HTTPCode
• S3 metrics: NumberObjects, BucketSize
• DynamoDB metrics: Read/Write capacity
• Custom metrics/alarms
Output functionality
• Launch instance/tasks/apps
• Provision tables/shards/storage
• External endpoints
https://aws.amazon.com/blogs/compute/scaling-amazon-ecs-services-automatically-using-amazon-cloudwatch-and-aws-lambda/

25. Using Lambda to forward SNS messages to external
endpoints
http://danilop.net/aws/2015/07/26/sns2ifttt/ | https://github.com/danilop/SNS2IFTTT
AWS
Lambda
Amazon
SNS
IFTTT via
the Maker
channel
Amazon
CloudWatch Alarm
Amazon
AutoScaling

26. Using SNS fan out S3 event notifications to multiple
Lambda functions
https://aws.amazon.com/blogs/compute/fanout-s3-event-notifications-to-multiple-endpoints/
Amazon S3 Amazon SNS
AWS Lambda
Function 1
AWS Lambda
Function 2

27. Using SNS+Lambda to manage and deploy Lambda
functions
https://aws.amazon.com/blogs/compute/dynamic-github-actions-with-aws-lambda/
AWS
Lambda
Amazon
SNS
GitHub Repo
lambda
createFn ()

28. Three Next Steps
1. Create and test your first Amazon SNS topic. When publishers have information or
updates to notify their subscribers about, they can publish a message to the topic –
which immediately triggers Amazon SNS to deliver the message to all applicable
subscribers.
2. Create and test your first Lambda function. With AWS Lambda, there are no new
languages, tools, or frameworks to learn. You can use any third party library, even
native ones.
3. Subscribe your Lambda function to your SNS topic … A message delivery from
Amazon SNS to an AWS Lambda function creates an instance of the AWS Lambda
function and invokes it with your message as an input.

29. Thank you!
Visit http://aws.amazon.com/sns, the AWS
Mobile Development blog, and the SNS forum to
learn more and get started using Amazon SNS
Visit http://aws.amazon.com/lambda, the
AWS Compute blog, and the Lambda forum
to learn more and get started using Lambda.