© 2015, Amazon Web Services, Inc. or its Affiliates. All rights reserved.

PresenterVyom Nagrani, Sr. Product Manager, AWS Lambda

Q&A ModeratorsAjay Nair, Sr. Product Manager, AWS LambdaArjun Cholkar, Principal Product Manager, Amazon SNS

September 15th, 2015

Best Practices: Infrastructure Deployment and Monitoring with AWS Lambda and Amazon SNS

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

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

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

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

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)

APN

SG

CM

AD

MW

NS

Mobile Push Gateways

Amazon SQS Queues

HTTP Destinations

SMS (US Mobile Numbers Only)

Email

AWS Lambda Functions

Walkthrough of using an Amazon SNS message to invoke AWS Lambda

Amazon SNS

AWS Lambda Amazon CloudWatch Logs

Publish message to

topic

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

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

Using SNS+Lambda for automated responses to alerts (Infrastructure Monitoring and Deployment)

AWS Lambda

Amazon SNS

Amazon CloudWatch Alarm

ec2runInstance

ecsstartTask

beanstalkupdateApp

kinesissplitShard

Any API call

Use cases of SNS+Lambda for Infrastructure Monitoring and AutomationInput 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/

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

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

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 ()

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.

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.

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