api-kong-lambda-christmas

The goal of this project is to learn how to set up a kong + aws-lambda platform. Kong act as a poweful and flexible API gateway. You can use kong communauty edition for this workshop. Then if you want to apply it to real API use cases, you should look at the entreprise edition to have all the benefits of the software.

STEP ONE : ENVIRONMENT SETTINGS

Configure an API Gateway with KONG

https://aws.amazon.com/marketplace/pp/B06WP4TNKL

It is necessary to accept the Terms and condiotions before proceding to the next steps.

Terraform

Terraform is a command line tool that can execute scripts to build and deploy any infrastructure in the cloud. The infrastructure being written as code, it can be versioned. AWS providers can be used to configure and instanciate any Amazon Cloud service.

Setup intructions can be found here :

Installing Terraform

Provisionning

Export environment variables :

export AWS_ACCESS_KEY_ID="AKIAI3YZDZJOHEMDF22A"
export AWS_SECRET_ACCESS_KEY="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"
export AWS_DEFAULT_REGION="eu-west-2"

Inside the project dir, enter tf/ and execute the following commands :

terraform init
terraform apply -auto-approve

This should resulr in the following output if successfull :

Apply complete! Resources: 20 added, 0 changed, 0 destroyed.

Outputs:

ec2_global_ips = [
    3.8.88.3
]
s3_arn = [
    arn:aws:s3:::kong-bucket-314d827647775cf799568685
]
s3_bucket_id = [
    kong-bucket-314d827647775cf799568685
]
s3_website_url = [
    kong-bucket-314d827647775cf799568685.s3-website.eu-west-2.amazonaws.com
]

In the EC2 dashboard, (after selecting the correct region : Europe Londres) the folowing services are running

EC2 Instance
Kong
DynamoDB Table

Create a MapQuest developer account

Create an account or login : https://developer.mapquest.com/

Create an API Key for the application :

apidays-workshop’s Keys	Value
Consumer Key	mBqpaCps3pGhXMF9CxbYYofsnz6kDez4
Consumer Secret	NRVKAeeybjsUDinO
Key Issued	Tue, 12/11/2018 - 06:34
Key Expires	Never

STEP TWO : CREATE THE MICRO SERVICES AS LAMBDA FUNCTIONS

Create a role to access DynamoDB from a Lambda function

In EC2 Dashboard, choose IAM

Setup the lambda functions

Go to aws services/lambda/functions
Choose Create function
Choose Author from scratch
Create the folowing functions :

getAllProducts

Runtime : Python 3.7
Role : DynamoLambda existing role

In the lambda_function.py, copy paste the content of getAllProducts.py from the lambda function directory In Environnement variable enter :

function getProductDetails

function createDeliveriesForAddress

AWS lamdba fonction to get the products list (id and name)
Setup kong to expose a route and call the aws lambda function
Step two

Step three: get product details function

AWS lambda function to get a product detail
Setup kong to expose a route and call the aws lambda function
Setup front-end and activate CORS plugin at kong level
Step three

Step four: put an order request

AWS lambda function to request for an order
Setup kong to expose a route and call the aws lambda function
Step four

zipang/api-kong-lambda-christmas