AWS ECS 中的服务发现

Question

I currently have a Redis, Postgres and a few Golang containers in a project of mine. I've got it all working locally on my machine using docker-compose.

  redis:
    container_name: redis
    build:
      context: .
      dockerfile: redis/Dockerfile
    ports:
      - 6379:6379
    networks:
      - my-network

This allows me in my Golang microservice to use the container name to connect to the Redis container:

&redis.Pool{
    Dial: func() (redis.Conn, error) {
        return redis.Dial("tcp", "redis:6379")
},

This all works perfectly, however, I want to place these containers within ECR and use ECS. I'm a bit confused as to how to identify my services and communicate with them in AWS. If I set the namespace to say example and then the service discovery name to redis_service within the ECS service is it as simple as using:

&redis.Pool{
    Dial: func() (redis.Conn, error) {
        return redis.Dial("tcp", "example.redis_service:6379")
},

Any help would be appreciated!

Answer 1

After linking your containers you will be able to create connection between them the same way like it is done when setting it with docker-compose. It is described in AWS documentation for Dockerrun.aws.json v2

links List of containers to link to. Linked containers can discover each other and communicate securely.

That is if you are using Multicontainer Docker.

For more advanced/manual usage of ECS you may also be interested in this blog post