Description

This module creates the DNS and routing rule for a backend service. It's an opinionated module that forms the DNS name from the env (environment name), name (short name for the service - typically with the "-service" suffix removed) and domain.

For the live environment this will be:

name.domain

For the non-live environments this will be:

env-name.dev.domain

This is intended for use in a backend router component (i.e. one created from https://github.com/mergermarket/backend-router-boilerplate).

Usage

Add this to the bottom of the infra/main.tf file in your backend router for each service:

# Results in DNS and routing for this in live:
#   my-example.mmgapi.net
# ...or this in a non-live environment (e.g. aslive):
#   aslive-my-example.dev.mmgapi.net

module "tf_backend_service_routing" "notifications-profile-matching-service" {
    source           = "github.com/mergermarket/tf_backend_service_routing"
    env              = "${var.env}"
    name             = "notifications-profile-matching"
    domain           = "mmgapi.net"
    priority         = "100"
    target_group_arn = "${var.target_groups["notifications-profile-matching-service"]}"
    alb_listener_arn = "${module.backend_router.alb_listener_arn}" 
    alb_dns_name     = "${module.backend_router.alb_dns_name}"
}

Then put the ARN for the target group of your service in each environment into config/qa.json, config/aslive.json, ...:

{
    "target_groups": {
        "notifications-profile-matching-service": "arn:of:the:qa:notifications-profile-matching-service:target:group"
    }
}