aws cloudformation hello world

Cloudformation is quite cool and this is an example of how to do a simple s3 bucket creations.

AWSTemplateFormatVersion: '2010-09-09'

Description: Simple Lambda Hello World example

 

Resources:

  MyS3Bucket:

    Type: AWS::S3::Bucket

    Properties:

      BucketName: !Sub "jeremywootestbucketstore123"

The resources followed by MyS3Bucket (this can be any meaningful name). Type is mandatory and it has to be pre-defined and we're creating a s3 bucket. As for the properties, it has to be references from the documentation. 

And then we have outputs - where we can see what the ARN and websiteURL for our s3 bucket. Notice that this doesn't allow you to shared with other resources.

Outputs:

  BucketName:

    Description: The name of the S3 bucket.

    Value: !Ref MyS3Bucket

    Export:

      Name: MyS3Bucket

  BucketArn:

    Description: The ARN of the S3 bucket.

    Value: !GetAtt MyS3Bucket.Arn

  BucketWebsiteURL:

    Description: The URL for the S3 bucket if configured for website hosting.

    Value: !GetAtt MyS3Bucket.WebsiteURL

To make it shareable to other resources, we simply add Export, as seen here:- 

Outputs:

  BucketName:

    Description: The name of the S3 bucket.

    Value: !Ref MyS3Bucket

    Export:

      Name: MyS3Bucket

  BucketArn:

    Description: The ARN of the S3 bucket.

    Value: !GetAtt MyS3Bucket.Arn

    Export:

      Name: !Sub "${AWS::StackName}-BucketArn"

  BucketWebsiteURL:

    Description: The URL for the S3 bucket if configured for website hosting.

    Value: !GetAtt MyS3Bucket.WebsiteURL

    Export:

      Name: !Sub "${AWS::StackName}-BucketWebsiteURL"

To create this stack, simply run

aws cloudformation create-stack   --stack-name lambda-store   --template-body file://store.yaml   --capabilities CAPABILITY_NAMED_IAM   --region ap-southeast-2

And then once you've created it, you can see we have the outputs and exports. 

Repository link here:-

https://github.com/kepungnzai/cloudformation-helloworld