Example_2

Example 2 - Hello World from AWS lambda with API gateway integration

Same greetings lambda as in Example 1 - but this time with API gateway integration and a possibility to deploy it to the world!

All commands should be invoked from Example_2 directory

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Validate template:

sam validate

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Start local api

 sam local start-api

You should see something like this:

$ sam local start-api
2019-05-09 11:57:41 Found credentials in shared credentials file: ~/.aws/credentials
2019-05-09 11:57:41 Mounting GetCurrentConfig at http://127.0.0.1:3000/hello [GET]
2019-05-09 11:57:41 You can now browse to the above endpoints to invoke your functions. You do not need to restart/reload SAM CLI while working on your functions, changes will be reflected instantly/automatically. You only need to restart SAM CLI if you update your AWS SAM template
2019-05-09 11:57:41  * Running on http://127.0.0.1:3000/ (Press CTRL+C to quit)

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Test it

just go to http://127.0.0.1:3000/hello

or be fancy and provide Your name! http://127.0.0.1:3000/hello?name=wojtek

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Deploy it to the Cloud!

• create an S3 bucket for our template data:

aws s3 mb s3://BUCKET_NAME

remember that bucket name needs to be unique globally on AWS so names like 'tempbucket' would probably be taken. This name will be used later on in every deploy command - so keep it in mind.

• package project and generate processed template:

sam package \
   --template-file template.yaml \
   --output-template-file generated-template.yaml \
   --s3-bucket BUCKET_NAME

• deploy stack

sam deploy \
   --template-file generated-template.yaml \
   --stack-name AWS-SAM-WORKSHOP-EXAMPLE-2 \
   --capabilities CAPABILITY_IAM

• watch stack is being created in AWS Console here
• test it online: Api URL should be visible in the Outputs section of stack details page or You could use:

aws cloudformation describe-stacks --stack-name AWS-SAM-WORKSHOP-EXAMPLE-2

and look up Outputs key

• test it from the cloud!