API Reference

Network is configured through StackSettings.network. The generated Network resource appears in stack state, but application code does not create it directly.

StackSettings.network

type StackSettings = {
  network?: NetworkSettings | null
}

use-default

Uses the provider default network when available.

{
  "network": {
    "type": "use-default"
  }
}

Field	Type	Required	Description
`type`	`"use-default"`	Yes	Use provider defaults.

create

Creates an isolated network for the deployment.

{
  "network": {
    "type": "create",
    "cidr": "100.88.0.0/16",
    "availability_zones": 2
  }
}

Field	Type	Required	Description
`type`	`"create"`	Yes	Create a new VPC/VNet.
`cidr`	`string \| null`	No	VPC/VNet CIDR. If omitted, Alien generates a non-overlapping `/16` candidate.
`availability_zones`	`number`	No	Number of zones. Default is `2`.

byo-vpc-aws

References an existing AWS VPC.

{
  "network": {
    "type": "byo-vpc-aws",
    "vpc_id": "vpc-0123456789abcdef0",
    "public_subnet_ids": ["subnet-public-a", "subnet-public-b"],
    "private_subnet_ids": ["subnet-private-a", "subnet-private-b"],
    "security_group_ids": ["sg-0123456789abcdef0"]
  }
}

Field	Type	Required	Description
`type`	`"byo-vpc-aws"`	Yes	AWS BYO VPC mode.
`vpc_id`	`string`	Yes	Existing VPC ID.
`public_subnet_ids`	`string[]`	Yes	Public subnet IDs used for public ingress resources.
`private_subnet_ids`	`string[]`	Yes	Private subnet IDs used for services that should not receive public IPs.
`security_group_ids`	`string[]`	No	Security groups to use.

byo-vpc-gcp

References an existing GCP VPC and subnet.

{
  "network": {
    "type": "byo-vpc-gcp",
    "network_name": "customer-vpc",
    "subnet_name": "app-us-central1",
    "region": "us-central1"
  }
}

Field	Type	Required	Description
`type`	`"byo-vpc-gcp"`	Yes	GCP BYO VPC mode.
`network_name`	`string`	Yes	Existing VPC network name.
`subnet_name`	`string`	Yes	Existing subnet name.
`region`	`string`	Yes	Region containing the subnet.

byo-vnet-azure

References an existing Azure VNet.

{
  "network": {
    "type": "byo-vnet-azure",
    "vnet_resource_id": "/subscriptions/.../virtualNetworks/customer-vnet",
    "public_subnet_name": "public",
    "private_subnet_name": "private"
  }
}

Field	Type	Required	Description
`type`	`"byo-vnet-azure"`	Yes	Azure BYO VNet mode.
`vnet_resource_id`	`string`	Yes	Full resource ID of the existing VNet.
`public_subnet_name`	`string`	Yes	Public subnet name.
`private_subnet_name`	`string`	Yes	Private subnet name.
`application_gateway_subnet_name`	`string`	No	Dedicated subnet for a classic Application Gateway.
`private_endpoint_subnet_name`	`string`	No	Dedicated subnet for Private Endpoints. Required only when the stack contains a Postgres resource.

Outputs

Network outputs are cloud-agnostic and intended for observability.

Field	Type	Description
`networkId`	`string`	Human-readable cloud network identifier.
`availabilityZones`	`number`	Number of zones used.
`hasPublicSubnets`	`boolean`	Whether public subnets exist.
`hasNatGateway`	`boolean`	Whether a managed NAT gateway exists.
`cidr`	`string \| null`	CIDR block when created by Alien.