Update Lambda function upon commit

Question

I am looking to develop a work flow as follows

The developers commit their code to github
As soon as the Master branch changes (merge), through web hooks, it triggers a AWS CodePipeline where Build happens as a second stage using CodeBuild
Ideally the work flow exists already for CodeDeploy or ECS where the built artifact replaces the task definition in ECS and updates the service. But I am looking for a lambda deployment.

It means, the built artifact or the zip file that gets uploaded to S3 bucket by CodeBuild should trigger a lambda function and also the lambda function code should be updated from the artifacts of CodeBuild.

Now I know one of the triggers for Lambda is S3 but it only triggers a already defined lambda function to execute but not update the function and execute it.

From the console, I do not think there is a way to do this directly. As complicated as it sounds, I am hoping there is a way.

Any pointers in that direction would be great.

MaiKaY · Accepted Answer · 2018-06-04 12:48:57Z

3

I am using AWS CloudFormation to do my AWS Lambda deployment. In this case my AWS CodePipeline got 3 Stages (for simplicity):

Stage "Source": GitHub
Stage "Build": AWS CodeBuild
Stage "Deploy": AWS CloudFormation

Inside the Build Stage i am doing the typical building procedure npm install, npm test, etc.

Important here: in the end of my build i am using aws cloudformation package which puts my code together, uploads it automatically to S3 and generates a final AWS CloudFormation template which i am then use in the 3. Stage "Deploy".

answered Jun 4, 2018 at 12:48

MaiKaY

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3 Comments

Parthiva Over a year ago

Based on your idea I built up a SAM template but the exact same steps. Thank you

Bala krishna Over a year ago

@SriharshaPolimetla, can you please share the SAM template that you built

Parthiva Over a year ago

@Balakrishna github.com/S-Polimetla/lambda-dynamodb-api-sam Maybe this repo helps you

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