Linked Stacks

publish_output "<output_name>" {
  type  = <type>
  value = <expression>
}

publish_output "vpc_id" {
  type  = string
  value = deployment.network.vpc_id
}

publish_output "subnet_ids" {
  type  = list(string)
  value = deployment.network.private_subnet_ids
}

publish_output "regional_vpc_ids" {
  type = map(string)
  value = {
    us_east = deployment.us_east.vpc_id
    us_west = deployment.us_west.vpc_id
    eu_west = deployment.eu_west.vpc_id
  }
}

publish_output "database_config" {
  type = object({
    endpoint = string
    port     = number
    name     = string
  })
  value = {
    endpoint = deployment.production.db_endpoint
    port     = deployment.production.db_port
    name     = deployment.production.db_name
  }
}

publish_output "api_endpoints" {
  type = map(object({
    url    = string
    region = string
  }))
  value = {
    for env in ["dev", "staging", "prod"] : env => {
      url    = deployment[env].api_url
      region = deployment[env].region
    }
  }
}

upstream_input "<input_name>" {
  type   = "stack"
  source = "<stack_address>"
}

upstream_input "network" {
  type   = "stack"
  source = "app.terraform.io/my-org/my-project/networking-stack"
}

deployment "application" {
  inputs = {
    vpc_id     = upstream_input.network.vpc_id
    subnet_ids = upstream_input.network.subnet_ids
  }
}

upstream_input "network" {
  type   = "stack"
  source = "app.terraform.io/my-org/my-project/network-stack"
}

upstream_input "database" {
  type   = "stack"
  source = "app.terraform.io/my-org/my-project/database-stack"
}

deployment "application" {
  inputs = {
    vpc_id              = upstream_input.network.vpc_id
    subnet_ids          = upstream_input.network.private_subnet_ids
    database_endpoint   = upstream_input.database.endpoint
    database_credentials = upstream_input.database.credentials
  }
}

upstream_input "regional_network" {
  type   = "stack"
  source = "app.terraform.io/my-org/my-project/regional-networks"
}

deployment "us_east_app" {
  inputs = {
    region     = "us-east-1"
    vpc_id     = upstream_input.regional_network.regional_vpc_ids["us_east"]
    subnet_ids = upstream_input.regional_network.regional_subnet_ids["us_east"]
  }
}