tg: generalise further

deploy/tg/global.hcl

@@ -2,7 +2,7 @@ locals {
   aws_account  = get_env("AWS_ACCOUNT_ID")
   aws_region   = get_env("AWS_REGION")
   environment  = get_env("ENVIRONMENT")
-  project_name = "sample-django-app"
+  project_name = get_env("APP_NAME")
   state_bucket = "tfstate-${local.aws_account}-${local.aws_region}"
   state_key    = "apps/${local.project_name}/${local.environment}/ecs.tfstate"
 }

deploy/tg/terragrunt.hcl

@@ -7,14 +7,13 @@ inputs = {
   app_name       = get_env("APP_NAME")
   cluster_arn    = get_env("CLUSTER_ARN", "")
   create_cluster = get_env("CREATE_CLUSTER", true)
+  environment    = local.global.environment
 
-  environment = local.global.environment
-
-  # fetch the ssm parameter names
+  # fetch the shared infrastructure parameter name
   alb_parameter_name = get_env("ALB_PARAMETER_NAME")
 
   # DNS hostnames to associate with the container
-  app_hostnames = ["api-${local.global.environment}"]
+  app_hostnames = split(",", get_env("APP_HOSTNAMES", local.default_hostname))
 
   # container-specific environment variables
   container_vars = local.container_vars
@@ -26,6 +25,7 @@ inputs = {
 locals {
   container_var_defaults = yamldecode(file("../container/vars.yaml"))
   # get any overrides from the environment (e.g. GitHub deployment variables)
-  container_vars = { for k, v in local.container_var_defaults : k => can(get_env(upper(k))) ? get_env(upper(k)) : v }
-  global         = include.global.locals
+  container_vars   = { for k, v in local.container_var_defaults : k => can(get_env(upper(k))) ? get_env(upper(k)) : v }
+  default_hostname = join("-", [get_env("APP_NAME"), local.global.environment])
+  global           = include.global.locals
 }