AWS API Gateway configuration

Here are the steps to configure API Gateway for integrated website.

Step 1: Create Rest API shown as below.

Step 2: Create resource as “proxy’.

Step 3: Create method as “Any” type

The method type is “Any”, so all the functions behind the Lambda either get or post will work within API. The invocation of the lambda function is dynamic. Define stage variable in place of lambda function name.

On click of Save, AWS will ask to add permission to Lambda function that can be executable by API gateway. Replace the value of ${stageVariables.functionname} to the lambda function name. Execute below command to CLI.

aws lambda add-permission  --function-name "arn:aws:lambda:ap-south-1:518955882229:function:${stageVariables.functionname}"  --source-arn "arn:aws:execute-api:ap-south-1:518955882229:u5ismynmx3/*/*/*"  --principal apigateway.amazonaws.com  --statement-id c7210776-beb6-4aad-bcfa-fdb20972f52f  --action lambda:InvokeFunction

Step 4: Deploy API

Create stages of API gateway like Stage and Prod.

 

Step 5: Assign lambda function to variable

Select the created stage. In stage variables, add new stage variable with name “functionname” and value “your lambda function”.

Step 6: Create custom domain for your API. (To be done by cloud team)

Step 7: Configure cloud watch Logs and alarms. Add newly created API to cloud watch dashboard (To be done by cloud team).