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© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Building multi-region, active-active serverless applications Adrian Hornsby Principal Evangelist Amazon Web Services @adhorn

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Why build a global architecture?

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Once upon a time … Origin

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And now . . . Origin ~300ms

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Origin Improve latency for end users Origin

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Improve availability and disaster recovery Applications in US West Applications in US East Users from San Francisco Users from New York Service 1 Service 2 Service 3 Service 4 Service 1 Service 2 Service 3 Service 4

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Amazon global network

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Origin Cross-region VPC peering Origin

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Amazon S3 cross-region replication Bucket with objects Bucket with objects

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Build high performance, globally distributed applications Low latency reads & writes to locally available tables Disaster proof with multi-region redundancy Easy to set up and no application rewrites required Globally dispersed users Replica (N. America) Replica (Europe) Replica (Asia) Global App Global Table Amazon DynamoDB Global Tables Fully managed, multi-master, multi-region database

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Active-Active | Active-Passive | What to do?

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Serverless cost model is a huge advantage here!

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© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.

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© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Route 53 > API Gateway > Lambda > DynamoDB

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Global Table https://global.adhorn.me AWS Lambda AWS Lambda Amazon DynamoDB Amazon DynamoDB Amazon API Gateway Amazon API Gateway Amazon Route 53 Region Region us-east-1 Region Region us-west-2

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Multi-region with Route 53 Amazon Route 53

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Latency-based routing Application Application Amazon Route 53 Region Region

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Geo-based routing Application Application Amazon Route 53 Region Region

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Weighted round robin routing Application Application Amazon Route 53 Region Region

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DNS failover Application Application Region Region Amazon Route 53

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Global Table Amazon DynamoDB Amazon DynamoDB Region Region Region us-east-1 Region us-west-2

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Global Table AWS Lambda AWS Lambda Amazon DynamoDB Amazon DynamoDB Region Region Region us-east-1 Region us-west-2

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https://globalddb.adhorn.me Regional API Endpoint Custom Domain Name Regional API Endpoint Custom Domain Name API Gateway Amazon API Gateway Amazon API Gateway AWS Lambda AWS Lambda Amazon Route 53 Region Region

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Route53: Traffic policy

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Health checks with Route 53

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Global Table https://global.adhorn.me AWS Lambda AWS Lambda Amazon DynamoDB Amazon DynamoDB Amazon API Gateway Amazon API Gateway Amazon Route 53 Region Region us-east-1 Region Region us-west-2 Voilà!

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© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Global Accelerator > Load Balancer > Lambda > DynamoDB

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Global Table AWS Lambda AWS Lambda Amazon DynamoDB Amazon DynamoDB AWS Global Accelerator Application Load Balancer Application Load Balancer Region Region eu-central-1 Region Region us-west-2

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AWS Global Accelerator

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Global Table Amazon DynamoDB Amazon DynamoDB Region Region eu-central-1 Region Region us-west-2

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Global Table AWS Lambda AWS Lambda Amazon DynamoDB Amazon DynamoDB Region Region eu-central-1 Region Region us-west-2

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Global Table AWS Lambda AWS Lambda Amazon DynamoDB Amazon DynamoDB Application Load Balancer Application Load Balancer Region Region eu-central-1 Region Region us-west-2

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Global Table AWS Lambda AWS Lambda Amazon DynamoDB Amazon DynamoDB AWS Global Accelerator Application Load Balancer Application Load Balancer Voilà! Region Region eu-central-1 Region Region us-west-2

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© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.

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© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. N EW - BETA

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N EW - BETA

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N EW - BETA

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N EW - BETA

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N EW - BETA

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N EW - BETA

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N EW - BETA

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N EW - BETA

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https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-vs-rest.html N EW - BETA

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© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.

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Amazon CloudFront AWS Lambda Lambda@Edge Lambda@Edge

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Lambda@Edge Events CloudFront cache Viewer Response Origin Response Origin Origin Request Viewer Viewer Request

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Write Once, Run Lambda Functions Globally N Virginia AWS Location AWS Location AWS Location AWS Location AWS Location AWS Location

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Lambda@Edge Programming Model exports.handler = (event, context, callback) => { /* viewer-request and origin-request events * have the request as input */ const request = event.Records[0].cf.request; /* viewer-response and origin-response events * have the response as input */ const response = event.Records[0].cf.response; /* Do the processing – say add a header */ /* When I am done I let CloudFront what to do next */ callback(null, request); }

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#awssummit Joris Andrade Software Engineer FrontApp @Zambka

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#awssummit Multi-region setup • Data from a customer in only 1 region • US-West-1 ! / EU-West-1 " • Dynamic routing with DynamoDB • VPC Peering

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#awssummit Multi-region Setup

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#awssummit High Latency for global teams Customers with global teams experience very high latencies when their API traffic is routed to their “home” region through a different intermediate region.

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#awssummit Reduce latency for global teams

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Lambda @ Edge

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#awssummit Live Demo

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#awssummit Takeaways Great impact for our global customers : up to 50% latency reduction 0 0.5 1 1.5 2 2.5 AVG P50 P95 P99

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https://medium.com/@adhorn

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Thank you! © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Adrian Hornsby adhorn@amazon.com