Internal Amazon API Gateway with Terraform

Intended Architecture

Deployment Order

In order to avoid dependency issues it is recommended to execute deployment of resources in the following order:

1. VPC
2. Relational Database
3. DynamoDB
4. S3
5. Load Balancers
6. Code Deploy
7. ECS Cluster
8. ECR
9. API Gateway
10. Backend Microservice 1
11. Frontend Microservice
12. Backend Microservice 2

Note: Relational Database, DynamoDB and S3 are dependent on the microservices used in this specific implementation. Only use them in your infrastructure if your applications need them, else replace with your own infrastructure and skip to Load Balancers .

VPC

Init and apply from:

    cd account/environment/infrastructure/vpc

Relational Database

• Used by the backend users application to persist data.

Init and apply from:

    cd account/environment/services/rds

DynamoDB

• Used by the backend products application to persist data

Init and apply from:

    cd account/environment/services/dynamodb

S3 Bucket

• Used by the backend products application to post and persist images.

Init and apply from:

    cd account/environment/services/s3

Load Balancers

• Configured to allow traffic on port 80 from a personal IP address. If secure access for the public is required, uncomment and follow the instructions in modules/support/services/load-balancers/listeners.tf .

Init and apply from:

    cd account/environment/services/load-balancers

Code Deploy

• Used to implement a blue green deployment style.

Init and apply from:

    cd account/emvironment/services/code-deploy

ECS Cluster

• The cluster in which all the services reside.

Init and apply from:

    cd account/emvironment/services/cluster

ECR

• After applying this step you will need to push your images to the repositories before continuing.

Init and apply from:

    cd account/environment/services/ecr

API Gateway

Init and apply from:

    cd account/environment/services/api-gateway

Backend Users Service

• The first service to go up in order to resolve dependency issues.

Init and apply from:

    cd account/environment/services/ecs-backend-users

Frontend Service

Init and apply from:

    cd account/environment/services/ecs-frontend

Backend Products Service

Init and apply from:

    cd account/environment/services/ecs-backend-products