Running AWS services locally during development can improve developer productivity and reduce the risk of issues once code is deployed to remote environments. In this talk at the February 2018 AWS Leeds User Group, I outlined how we have started to achieve this.

1. Running AWS Locally
Chris Gillespie

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Established 6 years ago.
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~2 years into our AWS journey.
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~30 headcount.
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Primarily back-end.
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PHP / Java.
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Based in Huddersfield.

3. ●
Software Engineer / Solution Architect.
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Co-founder of Elder Studios and some other startups.
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Occasionally lecture at University of Huddersfield.
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~2 years into my AWS journey.
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Java, Java, Java.... tempted by Golang.
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@NorthernChrisG

4. AGENDA
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Boot up and “run AWS locally”.
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Identify the services we can run locally.
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Interact.
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Technique for swapping local / remote in our code.
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Further uses.

5. AGENDA
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Boot up and “run AWS locally”.
●
Identify the services we can run locally.
●
Interact.
●
Technique for swapping local / remote in our code.
●
Further uses.

6. RUN AWS LOCALLY
Multiple single service options available:
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Downloadable Dynamodb from AWS
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SAM Local from AWS for Lambda / API Gateway
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Elasticsearch is.... elasticsearch!
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Minio for S3
But we will focus on...

7. LOCALSTACK https://localstack.cloud/

8. BOOT UP
docker run -p 4567-4580:4567-4580 localstack/localstack

9. INTERACT
THEORY... The AWS CLI uses the SDK. If the AWS CLI works
with localstack, the SDK works. Let's give it a go....
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It's all about the endpoint setting.
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Credentials are required, but not validated.

10. SWAPPING LOCAL / REMOTE
I want to point my application at local AWS.
The SDK contains all the necessary methods to explicitly set
the endpoint, region and credentials.

12. MANAGING IT
Spring Framework enabled us to easily manage the selection
between the two at runtime for testing / production without
hacking at the code.
Dependency Injection for the win!

14. FURTHER USES
As part of automated testing. Enable end-to-end tests.
https://localstack.cloud/images/diagram.png

15. Lightweight / Temporary Environments.
Testing, sales demo sites, sprint demo etc
FURTHER USES
+

16. docker-compose up

17. QUESTIONS?