🔧 add extra tags config

Author: 5up3r20e

README.md

@@ -30,7 +30,9 @@ module "test" {
 | name_prefix | a name prefix used to tag vpc | `string` | true | yes |
 | vpc_cidr | vpc cidr block | `string` | false | yes |
 | public_subnets | public subnets map, availability zone map to cidr block | `map` | false | yes |
+| extra_public_subnet_tags | extra tags to add to public subnet | `map` | false | false |
 | private_subnets | private subnets map, availability zone map to cidr block | `map` | false | yes |
+| extra_private_subnet_tags | extra tags to add to private subnet | `map` | false | false |
 | natgateway | nat gateway list of availability zone to spread | `list` | false | yes |
 
 ## output

example/main.tf

@@ -8,6 +8,12 @@ module "test" {
     b = "10.17.2.0/23"
     c = "10.17.4.0/23"
   }
+  extra_public_subnet_tags = {
+    "kubernetes.io/cluster/my-cluster" = "shared"
+  }
+  extra_private_subnet_tags = {
+    "kubernetes.io/cluster/my-cluster" = "shared"
+  }
   private_subnets = {
     a = "10.17.6.0/23"
     b = "10.17.8.0/23"
@@ -16,7 +22,7 @@ module "test" {
 }
 
 output "public-subnet-ids" {
-  value = [ for k,v in module.test.public-subnet-ids: v]
+  value = [for k, v in module.test.public-subnet-ids : v]
 }
 output "a-private-subnet-id" {
   value = module.test.private-subnet-ids["a"]

main.tf

@@ -53,9 +53,9 @@ resource "aws_subnet" "public-subnet" {
   cidr_block              = each.value
   availability_zone       = format("%s%s", data.aws_region.current.name, each.key)
   map_public_ip_on_launch = "true"
-  tags = {
+  tags = merge({
     "Name" = format("%s-public-%s", var.name_prefix, each.key)
-  }
+  }, var.extra_public_subnet_tags)
 }
 resource "aws_route_table_association" "public-rba" {
   for_each = var.public_subnets
@@ -84,9 +84,9 @@ resource "aws_subnet" "private-subnet" {
   cidr_block              = each.value
   availability_zone       = format("%s%s", data.aws_region.current.name, each.key)
   map_public_ip_on_launch = "false"
-  tags = {
+  tags = merge({
     "Name" = format("%s-private-%s", var.name_prefix, each.key)
-  }
+  }, var.extra_private_subnet_tags)
 }
 
 resource "aws_route_table" "private-rt" {

variables.tf

@@ -16,6 +16,11 @@ variable "public_subnets" {
   }
   description = "public subnets map, availability zone map to cidr block"
 }
+
+variable "extra_public_subnet_tags" {
+  default     = {}
+  description = "extra tags to add to public subnet"
+}
 variable "private_subnets" {
   default = {
     a = "10.240.12.0/22"
@@ -25,6 +30,11 @@ variable "private_subnets" {
   description = "private subnets map, availability zone map to cidr block"
 }
 
+variable "extra_private_subnet_tags" {
+  default     = {}
+  description = "extra tags to add to private subnet"
+}
+
 variable "natgateway" {
   default     = ["a", "b", "c"]
   description = "nat gateway list of availability zone to spread"