add prefix list to web

terraform-modules · Oct 2, 2025 · 092eb99 · 092eb99
1 parent 7b65d71
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -85,3 +85,6 @@
 
 * 2.7.0 -- 2025-08-26
   - custom: add prefix list capability
+
+* 2.8.0 -- 2025-10-02
+  - web: add prefix list capability
diff --git a/common/version.tf b/common/version.tf
@@ -1,3 +1,3 @@
 locals {
-  _module_version = "2.7.0"
+  _module_version = "2.8.0"
 }
diff --git a/web/README.md b/web/README.md
@@ -21,23 +21,30 @@ module "web" {
   # name = "m-web"
   # ingress_networks = [ "1.2.3.0/24" ]
   # egress_networks = [ "1.2.3.0/24" ]
+  # ingress_prefix_list_names = [ "onprem-networks.core" ]
+  # egress_prefix_list_names = [ ]
 
   ## tags for Name, CostAllocation, and Environment are pre-set, but they can be overriden
   # tags = { }
 }
 ```
+## ingress\_prefix\_list\_names
+In order to use a managed prefix list, you may pass a list of names in this field. The prefix lists
+will be looked up and the resultant IDs used in the security group for inbound port access to port
+443 (https). This will fail if the prefix list does not exist.
 
 ## Requirements
 
 | Name | Version |
 |------|---------|
-| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 0.12 |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.0.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 5.0 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | n/a |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 5.0 |
 
 ## Modules
 
@@ -48,6 +55,8 @@ No modules.
 | Name | Type |
 |------|------|
 | [aws_security_group.this_security_group](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/security_group) | resource |
+| [aws_ec2_managed_prefix_list.egress](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ec2_managed_prefix_list) | data source |
+| [aws_ec2_managed_prefix_list.ingress](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ec2_managed_prefix_list) | data source |
 | [aws_security_group.egress_security_groups](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/security_group) | data source |
 | [aws_security_group.ingress_security_groups](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/security_group) | data source |
 | [aws_vpc.this_vpc](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/vpc) | data source |
@@ -58,13 +67,15 @@ No modules.
 |------|-------------|------|---------|:--------:|
 | <a name="input_description"></a> [description](#input\_description) | Security Group Description | `string` | `"Web Security Group"` | no |
 | <a name="input_egress_networks"></a> [egress\_networks](#input\_egress\_networks) | List of egress networks (with all pre-defined egress ports) | `list(string)` | `[]` | no |
+| <a name="input_egress_prefix_list_names"></a> [egress\_prefix\_list\_names](#input\_egress\_prefix\_list\_names) | List of prefix list names for eggress access | `list(string)` | `[]` | no |
 | <a name="input_egress_security_groups"></a> [egress\_security\_groups](#input\_egress\_security\_groups) | List of egress security groups (all ports) | `list(string)` | `[]` | no |
 | <a name="input_enable_self"></a> [enable\_self](#input\_enable\_self) | Enable\|Disable self full access | `bool` | `false` | no |
 | <a name="input_ingress_networks"></a> [ingress\_networks](#input\_ingress\_networks) | List of ingress networks for access (with all pre-defined ingress ports) | `list(string)` | `[]` | no |
+| <a name="input_ingress_prefix_list_names"></a> [ingress\_prefix\_list\_names](#input\_ingress\_prefix\_list\_names) | List of prefix list names for ingress access | `list(string)` | `[]` | no |
 | <a name="input_ingress_security_groups"></a> [ingress\_security\_groups](#input\_ingress\_security\_groups) | List of ingress security groups for all ports | `list(string)` | `[]` | no |
 | <a name="input_name"></a> [name](#input\_name) | Security Group Name | `string` | `"m-web"` | no |
 | <a name="input_short_description"></a> [short\_description](#input\_short\_description) | Security Group Short Description | `string` | `"Web"` | no |
-| <a name="input_tags"></a> [tags](#input\_tags) | Extra security group tags | `map` | <pre>{<br>  "CostAllocation": "csvd:infrastructure",<br>  "Environment": "csvd-infrastructure"<br>}</pre> | no |
+| <a name="input_tags"></a> [tags](#input\_tags) | Extra security group tags | `map(any)` | <pre>{<br/>  "CostAllocation": "csvd:infrastructure",<br/>  "Environment": "csvd-infrastructure"<br/>}</pre> | no |
 | <a name="input_use_vpc_cidr"></a> [use\_vpc\_cidr](#input\_use\_vpc\_cidr) | Enable\|Disable use of VPC CIDR block in the ingress\_networks | `bool` | `false` | no |
 | <a name="input_vpc_full_name"></a> [vpc\_full\_name](#input\_vpc\_full\_name) | VPC Name | `string` | `""` | no |
 | <a name="input_vpc_id"></a> [vpc\_id](#input\_vpc\_id) | VPC ID Number | `string` | n/a | yes |

diff --git a/web/data.prefix_lists.tf b/web/data.prefix_lists.tf
@@ -0,0 +1 @@
+../common/data.prefix_lists.tf
diff --git a/web/main.tf b/web/main.tf
@@ -22,11 +22,17 @@
 *   # name = "m-web"
 *   # ingress_networks = [ "1.2.3.0/24" ]
 *   # egress_networks = [ "1.2.3.0/24" ]
+*   # ingress_prefix_list_names = [ "onprem-networks.core" ]
+*   # egress_prefix_list_names = [ ]
 *
 *   ## tags for Name, CostAllocation, and Environment are pre-set, but they can be overriden
 *   # tags = { }
 * }
 * ```
+* ## ingress_prefix_list_names
+* In order to use a managed prefix list, you may pass a list of names in this field. The prefix lists
+* will be looked up and the resultant IDs used in the security group for inbound port access to port
+* 443 (https). This will fail if the prefix list does not exist.
 */
 
 data "aws_vpc" "this_vpc" {
@@ -97,6 +103,20 @@ resource "aws_security_group" "this_security_group" {
     }
   }
 
+  # ingress with prefix lists
+  dynamic "ingress" {
+    for_each = length(var.ingress_prefix_list_names) > 0 ? local.port_map["external"] : toset([])
+    iterator = p
+    content {
+      description     = "${local.short_description}: ${p.value["description"]}"
+      from_port       = p.value["from"]
+      to_port         = p.value["to"]
+      protocol        = p.value["proto"]
+      prefix_list_ids = [for pl in data.aws_ec2_managed_prefix_list.ingress : pl.id]
+    }
+  }
+
+
   # egress all
   egress {
     description = "${local.short_description}: All"
@@ -119,6 +139,19 @@ resource "aws_security_group" "this_security_group" {
     }
   }
 
+  # egress with prefix lists
+  dynamic "egress" {
+    for_each = length(var.egress_prefix_list_names) > 0 ? { 1 = 1 } : {}
+    iterator = p
+    content {
+      description     = local.short_description
+      from_port       = 0
+      to_port         = 0
+      protocol        = -1
+      prefix_list_ids = [for pl in data.aws_ec2_managed_prefix_list.egress : pl.id]
+    }
+  }
+
   tags = merge(
     var.tags,
     {

diff --git a/web/variables.prefix_lists.tf b/web/variables.prefix_lists.tf
@@ -0,0 +1 @@
+../common/variables.prefix_lists.tf
diff --git a/web/variables.tf b/web/variables.tf
@@ -71,7 +71,7 @@ variable "egress_security_groups" {
 
 variable "tags" {
   description = "Extra security group tags"
-  type        = map
+  type        = map(any)
   default = {
     "CostAllocation" = "csvd:infrastructure"
     "Environment"    = "csvd-infrastructure"