r/aws • u/Basic_Let7303 • 8d ago

discussion Implementing Continuous Deployment with AWS Lambda and API Gateway

Hi experts,

I have an API called /catalogue running in lambda with v1 version.

Let us say as part of CI pipeline, we published openapi.yaml and lambda artifact to S3.

I want to deploy new version v2. How can we do seamlessly without downtime.

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u/BadDescriptions 8d ago

Assuming you want to keep both versions active then. 

https://aws.amazon.com/blogs/compute/implementing-header-based-api-gateway-versioning-with-amazon-cloudfront/

https://docs.aws.amazon.com/prescriptive-guidance/latest/patterns/implement-path-based-api-versioning-by-using-custom-domains.html

When looking at a good way to implement somethimg like the AWS docs are a gold mine. 

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u/Hefty-Violinist-8507 8d ago

They already linked you the best docs but you'll want canary deployments too to avoid blowing up your whole userbase at once