feat: Add database tags per az

Author: kahirokunn

README.md

@@ -383,6 +383,7 @@ No modules.
 | <a name="input_database_subnet_names"></a> [database\_subnet\_names](#input\_database\_subnet\_names) | Explicit values to use in the Name tag on database subnets. If empty, Name tags are generated. | `list(string)` | `[]` | no |
 | <a name="input_database_subnet_suffix"></a> [database\_subnet\_suffix](#input\_database\_subnet\_suffix) | Suffix to append to database subnets name | `string` | `"db"` | no |
 | <a name="input_database_subnet_tags"></a> [database\_subnet\_tags](#input\_database\_subnet\_tags) | Additional tags for the database subnets | `map(string)` | `{}` | no |
+| <a name="input_database_subnet_tags_per_az"></a> [database\_subnet\_tags\_per\_az](#input\_database\_subnet\_tags\_per\_az) | Additional tags for the database subnets where the primary key is the AZ | `map(map(string))` | `{}` | no |
 | <a name="input_database_subnets"></a> [database\_subnets](#input\_database\_subnets) | A list of database subnets | `list(string)` | `[]` | no |
 | <a name="input_default_network_acl_egress"></a> [default\_network\_acl\_egress](#input\_default\_network\_acl\_egress) | List of maps of egress rules to set on the Default Network ACL | `list(map(string))` | <pre>[<br>  {<br>    "action": "allow",<br>    "cidr_block": "0.0.0.0/0",<br>    "from_port": 0,<br>    "protocol": "-1",<br>    "rule_no": 100,<br>    "to_port": 0<br>  },<br>  {<br>    "action": "allow",<br>    "from_port": 0,<br>    "ipv6_cidr_block": "::/0",<br>    "protocol": "-1",<br>    "rule_no": 101,<br>    "to_port": 0<br>  }<br>]</pre> | no |
 | <a name="input_default_network_acl_ingress"></a> [default\_network\_acl\_ingress](#input\_default\_network\_acl\_ingress) | List of maps of ingress rules to set on the Default Network ACL | `list(map(string))` | <pre>[<br>  {<br>    "action": "allow",<br>    "cidr_block": "0.0.0.0/0",<br>    "from_port": 0,<br>    "protocol": "-1",<br>    "rule_no": 100,<br>    "to_port": 0<br>  },<br>  {<br>    "action": "allow",<br>    "from_port": 0,<br>    "ipv6_cidr_block": "::/0",<br>    "protocol": "-1",<br>    "rule_no": 101,<br>    "to_port": 0<br>  }<br>]</pre> | no |

main.tf

@@ -461,6 +461,7 @@ resource "aws_subnet" "database" {
     },
     var.tags,
     var.database_subnet_tags,
+    lookup(var.database_subnet_tags_per_az, element(var.azs, count.index), {})
   )
 }
 

variables.tf

@@ -558,6 +558,12 @@ variable "database_subnet_tags" {
   default     = {}
 }
 
+variable "database_subnet_tags_per_az" {
+  description = "Additional tags for the database subnets where the primary key is the AZ"
+  type        = map(map(string))
+  default     = {}
+}
+
 variable "database_subnet_group_tags" {
   description = "Additional tags for the database subnet group"
   type        = map(string)