feat: support creating vpc if not provided

Author: shanewxy

README.md

@@ -63,8 +63,11 @@ No modules.
 | [aws_service_discovery_instance.reader](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/service_discovery_instance) | resource |
 | [aws_service_discovery_service.primary](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/service_discovery_service) | resource |
 | [aws_service_discovery_service.reader](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/service_discovery_service) | resource |
+| [aws_subnet.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/subnet) | resource |
+| [aws_vpc.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/vpc) | resource |
 | [random_password.password](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/password) | resource |
 | [random_string.name_suffix](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/string) | resource |
+| [aws_availability_zones.selected](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/availability_zones) | data source |
 | [aws_kms_key.selected](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/kms_key) | data source |
 | [aws_service_discovery_dns_namespace.selected](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/service_discovery_dns_namespace) | data source |
 | [aws_subnets.selected](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/subnets) | data source |
@@ -78,7 +81,7 @@ No modules.
 | <a name="input_context"></a> [context](#input\_context) | Receive contextual information. When Walrus deploys, Walrus will inject specific contextual information into this field.<br><br>Examples:<pre>context:<br>  project:<br>    name: string<br>    id: string<br>  environment:<br>    name: string<br>    id: string<br>  resource:<br>    name: string<br>    id: string</pre> | `map(any)` | `{}` | no |
 | <a name="input_engine_parameters"></a> [engine\_parameters](#input\_engine\_parameters) | Specify the deployment parameters, see https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/ParameterGroups.Redis.html. | <pre>list(object({<br>    name  = string<br>    value = string<br>  }))</pre> | `[]` | no |
 | <a name="input_engine_version"></a> [engine\_version](#input\_engine\_version) | Specify the deployment engine version. | `string` | `"7.0"` | no |
-| <a name="input_infrastructure"></a> [infrastructure](#input\_infrastructure) | Specify the infrastructure information for deploying.<br><br>Examples:<pre>infrastructure:<br>  vpc_id: string                       # the ID of the VPC where the Redis service applies<br>  kms_key_id: string, optional         # the ID of the KMS key which to encrypt the Redis data<br>  domain_suffix: string, optional      # a private DNS namespace of the CloudMap where to register the applied Redis service</pre> | <pre>object({<br>    vpc_id        = string<br>    kms_key_id    = optional(string)<br>    domain_suffix = optional(string)<br>  })</pre> | n/a | yes |
+| <a name="input_infrastructure"></a> [infrastructure](#input\_infrastructure) | Specify the infrastructure information for deploying.<br><br>Examples:<pre>infrastructure:<br>  vpc_id: string, optional             # the ID of the VPC where the Redis service applies<br>  kms_key_id: string, optional         # the ID of the KMS key which to encrypt the Redis data<br>  domain_suffix: string, optional      # a private DNS namespace of the CloudMap where to register the applied Redis service</pre> | <pre>object({<br>    vpc_id        = optional(string)<br>    kms_key_id    = optional(string)<br>    domain_suffix = optional(string)<br>  })</pre> | `{}` | no |
 | <a name="input_password"></a> [password](#input\_password) | Specify the account password. The password must be 16-32 characters long and start with any letter, number, or the following symbols: ! # $ % ^ & * ( ) \_ + - =.<br>If not specified, it will generate a random password. | `string` | `null` | no |
 | <a name="input_replication_readonly_replicas"></a> [replication\_readonly\_replicas](#input\_replication\_readonly\_replicas) | Specify the number of read-only replicas under the replication deployment. | `number` | `1` | no |
 | <a name="input_resources"></a> [resources](#input\_resources) | Specify the computing resources.<br>Examples:<pre>resources:<br>  class: string, optional      # https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/CacheNodes.SupportedTypes.html</pre> | <pre>object({<br>    class = optional(string, "cache.t3.micro")<br>  })</pre> | <pre>{<br>  "class": "cache.t3.micro"<br>}</pre> | no |

examples/replication/README.md

@@ -3,11 +3,6 @@
 Deploy Redis service in replication architecture by root module.
 
 ```bash
-# setup infra
-$ terraform apply -auto-approve \
-  -target=aws_vpc.example \
-  -target=aws_subnet.example
-
 # create service
 $ terraform apply -auto-approve
 ```
@@ -23,9 +18,7 @@ $ terraform apply -auto-approve
 
 ## Providers
 
-| Name | Version |
-|------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 5.24.0 |
+No providers.
 
 ## Modules
 
@@ -35,11 +28,7 @@ $ terraform apply -auto-approve
 
 ## Resources
 
-| Name | Type |
-|------|------|
-| [aws_subnet.example](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/subnet) | resource |
-| [aws_vpc.example](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/vpc) | resource |
-| [aws_availability_zones.selected](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/availability_zones) | data source |
+No resources.
 
 ## Inputs
 

examples/replication/main.tf

@@ -15,45 +15,11 @@ terraform {
 
 provider "aws" {}
 
-data "aws_availability_zones" "selected" {
-  state = "available"
-
-  lifecycle {
-    postcondition {
-      condition     = length(self.names) > 0
-      error_message = "Failed to get Avaialbe Zones"
-    }
-  }
-}
-
-# create vpc.
-
-resource "aws_vpc" "example" {
-  instance_tenancy     = "default"
-  enable_dns_hostnames = true
-  enable_dns_support   = true
-  cidr_block           = "10.0.0.0/16"
-}
-
-resource "aws_subnet" "example" {
-  for_each = {
-    for k, v in data.aws_availability_zones.selected.names : v => cidrsubnet(aws_vpc.example.cidr_block, 8, k)
-  }
-
-  vpc_id            = aws_vpc.example.id
-  availability_zone = each.key
-  cidr_block        = each.value
-}
-
 # create redis service.
 
 module "this" {
   source = "../.."
 
-  infrastructure = {
-    vpc_id = aws_vpc.example.id
-  }
-
   architecture                  = "replication"
   replication_readonly_replicas = 3
 }

main.tf

@@ -23,12 +23,47 @@ locals {
   architecture = coalesce(var.architecture, "standalone")
 }
 
+# create vpc.
+
+resource "aws_vpc" "default" {
+  count = var.infrastructure.vpc_id == null ? 1 : 0
+
+  instance_tenancy     = "default"
+  enable_dns_hostnames = true
+  enable_dns_support   = true
+  cidr_block           = "10.0.0.0/16"
+}
+
+
+data "aws_availability_zones" "selected" {
+  count = var.infrastructure.vpc_id == null ? 1 : 0
+
+  state = "available"
+
+  lifecycle {
+    postcondition {
+      condition     = length(self.names) > 0
+      error_message = "Failed to get Avaialbe Zones"
+    }
+  }
+}
+
+resource "aws_subnet" "default" {
+  for_each = var.infrastructure.vpc_id == null ? {
+    for k, v in data.aws_availability_zones.selected[0].names : v => cidrsubnet(aws_vpc.default[0].cidr_block, 8, k)
+  } : {}
+
+  vpc_id            = aws_vpc.default[0].id
+  availability_zone = each.key
+  cidr_block        = each.value
+}
+
 #
 # Ensure
 #
 
 data "aws_vpc" "selected" {
-  id = var.infrastructure.vpc_id
+  id = var.infrastructure.vpc_id != null ? var.infrastructure.vpc_id : aws_vpc.default[0].id
 
   state = "available"
 

schema.yaml

@@ -5,16 +5,13 @@ components:
   schemas:
     variables:
       type: object
-      required:
-      - infrastructure
       properties:
         infrastructure:
           title: Infrastructure
           type: object
           description: |
             Specify the infrastructure information for deploying.
-          required:
-          - vpc_id
+          default: {}
           properties:
             domain_suffix:
               description: |
@@ -31,7 +28,8 @@ components:
               x-walrus-ui:
                 order: 2
             vpc_id:
-              description: "Specify the VPC ID where the Redis service applies. \n"
+              description: Specify the VPC ID where the Redis service applies. If
+                not specified, a new VPC will be created.
               title: Vpc Id
               type: string
               x-walrus-ui:

variables.tf

@@ -35,16 +35,17 @@ Specify the infrastructure information for deploying.
 Examples:
 ```
 infrastructure:
-  vpc_id: string                       # the ID of the VPC where the Redis service applies
+  vpc_id: string, optional             # the ID of the VPC where the Redis service applies
   kms_key_id: string, optional         # the ID of the KMS key which to encrypt the Redis data
   domain_suffix: string, optional      # a private DNS namespace of the CloudMap where to register the applied Redis service
 ```
 EOF
   type = object({
-    vpc_id        = string
+    vpc_id        = optional(string)
     kms_key_id    = optional(string)
     domain_suffix = optional(string)
   })
+  default = {}
 }
 
 #