AWS CDK Deploy ECR Source to ECS Fargate Blue/Green Deployment NestJS Microservice

Question

I have a nestjs monorepo micorservice that contains api-gateway and products. My api-gateway is listening on port 5000 and my products microservice is just set up as a microservice. The way I have it set up is that I use RabbitMq messaging to direct to the correct microservice. I am trying to deploy this to aws ecs using the cdk but have some difficulty (and its my first time working with microservices) so not sure where to start. If i understand this correctly I need to do the following: 
1. create an ecs cluster
2. set up my vpc and listener on port 80 (non-secure)
3. set up my task definitions ( do i need 1 with both ecr images in it or will i need 1 task definition per microservice, which in my case would be 2? )
4. create a service ( 1 for each task definition)
5. how do i set up blue green deployments?
6. tie it back to my code deploy pipeline

thoughts / suggestions?

Accepted Answer

Hello,

By API Gateway I guess you mean within your application, not using AWS API Gateway, right?

If you can put your services into a docker-compose file, which helps with local testing and configuration, [ECS Compose-X](https://docs.compose-x.io) will deal with setting everything up for you: it will create IaC templates (CloudFormation) to deploy everything to AWS (with something as simple as `ecs-compose-x up`. It will create your ECS Cluster, VPC, the ECS resources, IAM roles, etc. for you. You can also have it deal with other things such as DNS, ELB etc.

Alternatively, you can try Copilot too, but that does not use the docker-compose syntax.

Hope this helps,

AWS CDK Deploy ECR Source to ECS Fargate Blue/Green Deployment NestJS Microservice

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