Request: custom names for subnets and route tables

[RupertExact]

It would be very helpful to be able to use custom names in subnet and route table Name tags. Alternatively, a way to create additional custom subnets and route tables in addition to the 3 provided.

variables.tf
`variable "public_subnet_suffix" {
description = "Suffix to append to public subnets name"
default = "public"
}

variable "private_subnet_suffix" {
description = "Suffix to append to private subnets name"
default = "private"
}

variable "database_subnet_suffix" {
description = "Suffix to append to database subnets name"
default = "database"
}

variable "redshift_subnet_suffix" {
description = "Suffix to append to redshift subnets name"
default = "redshift"
}

variable "elasticache_subnet_suffix" {
description = "Suffix to append to elasticache subnets name"
default = "elasticache"
}`

main.tf
`#################

Private routes

There are so many routing tables as the largest amount of subnets of each type (really?)

#################
resource "aws_route_table" "private" {
count = "${var.create_vpc && local.max_subnet_length > 0 ? local.nat_gateway_count : 0}"

vpc_id = "${local.vpc_id}"

tags = "${merge(map("Name", (var.single_nat_gateway ? "${var.name}-${var.private_subnet_suffix}" : format("%s-${var.private_subnet_suffix}-%s", var.name, element(var.azs, count.index)))), var.private_route_table_tags, var.tags)}"

lifecycle {
# When attaching VPN gateways it is common to define aws_vpn_gateway_route_propagation
# resources that manipulate the attributes of the routing table (typically for the private subnets)
ignore_changes = ["propagating_vgws"]
}
}

#################

Database routes

#################
resource "aws_route_table" "database" {
count = "${var.create_vpc && var.create_database_subnet_route_table && length(var.database_subnets) > 0 ? 1 : 0}"

vpc_id = "${local.vpc_id}"

tags = "${merge(var.tags, var.database_route_table_tags, map("Name", "${var.name}-${var.database_subnet_suffix}"))}"
}

#################

Redshift routes

#################
resource "aws_route_table" "redshift" {
count = "${var.create_vpc && var.create_redshift_subnet_route_table && length(var.redshift_subnets) > 0 ? 1 : 0}"

vpc_id = "${local.vpc_id}"

tags = "${merge(var.tags, var.redshift_route_table_tags, map("Name", "${var.name}-${var.redshift_subnet_suffix}"))}"
}

#################

Elasticache routes

#################
resource "aws_route_table" "elasticache" {
count = "${var.create_vpc && var.create_elasticache_subnet_route_table && length(var.elasticache_subnets) > 0 ? 1 : 0}"

vpc_id = "${local.vpc_id}"

tags = "${merge(var.tags, var.elasticache_route_table_tags, map("Name", "${var.name}-${var.elasticache_subnet_suffix}"))}"
}

#################

Intra routes

#################
resource "aws_route_table" "intra" {
count = "${var.create_vpc && length(var.intra_subnets) > 0 ? 1 : 0}"

vpc_id = "${local.vpc_id}"

tags = "${merge(map("Name", "${var.name}-intra"), var.intra_route_table_tags, var.tags)}"
}

################

Public subnet

################
resource "aws_subnet" "public" {
count = "${var.create_vpc && length(var.public_subnets) > 0 && (!var.one_nat_gateway_per_az || length(var.public_subnets) >= length(var.azs)) ? length(var.public_subnets) : 0}"

vpc_id = "${local.vpc_id}"
cidr_block = "${var.public_subnets[count.index]}"
availability_zone = "${element(var.azs, count.index)}"
map_public_ip_on_launch = "${var.map_public_ip_on_launch}"

tags = "${merge(map("Name", format("%s-${var.public_subnet_suffix}-%s", var.name, element(var.azs, count.index))), var.public_subnet_tags, var.tags)}"
}

#################

Private subnet

#################
resource "aws_subnet" "private" {
count = "${var.create_vpc && length(var.private_subnets) > 0 ? length(var.private_subnets) : 0}"

vpc_id = "${local.vpc_id}"
cidr_block = "${var.private_subnets[count.index]}"
availability_zone = "${element(var.azs, count.index)}"

tags = "${merge(map("Name", format("%s-${var.private_subnet_suffix}-%s", var.name, element(var.azs, count.index))), var.private_subnet_tags, var.tags)}"
}

##################

Database subnet

##################
resource "aws_subnet" "database" {
count = "${var.create_vpc && length(var.database_subnets) > 0 ? length(var.database_subnets) : 0}"

vpc_id = "${local.vpc_id}"
cidr_block = "${var.database_subnets[count.index]}"
availability_zone = "${element(var.azs, count.index)}"

tags = "${merge(map("Name", format("%s-${var.database_subnet_suffix}-%s", var.name, element(var.azs, count.index))), var.database_subnet_tags, var.tags)}"
}

resource "aws_db_subnet_group" "database" {
count = "${var.create_vpc && length(var.database_subnets) > 0 && var.create_database_subnet_group ? 1 : 0}"

name = "${lower(var.name)}"
description = "Database subnet group for ${var.name}"
subnet_ids = ["${aws_subnet.database.*.id}"]

tags = "${merge(map("Name", format("%s", var.name)), var.database_subnet_group_tags, var.tags)}"
}

##################

Redshift subnet

##################
resource "aws_subnet" "redshift" {
count = "${var.create_vpc && length(var.redshift_subnets) > 0 ? length(var.redshift_subnets) : 0}"

vpc_id = "${local.vpc_id}"
cidr_block = "${var.redshift_subnets[count.index]}"
availability_zone = "${element(var.azs, count.index)}"

tags = "${merge(map("Name", format("%s-${var.redshift_subnet_suffix}-%s", var.name, element(var.azs, count.index))), var.redshift_subnet_tags, var.tags)}"
}

resource "aws_redshift_subnet_group" "redshift" {
count = "${var.create_vpc && length(var.redshift_subnets) > 0 ? 1 : 0}"

name = "${var.name}"
description = "Redshift subnet group for ${var.name}"
subnet_ids = ["${aws_subnet.redshift.*.id}"]

tags = "${merge(map("Name", format("%s", var.name)), var.redshift_subnet_group_tags, var.tags)}"
}

#####################

ElastiCache subnet

#####################
resource "aws_subnet" "elasticache" {
count = "${var.create_vpc && length(var.elasticache_subnets) > 0 ? length(var.elasticache_subnets) : 0}"

vpc_id = "${local.vpc_id}"
cidr_block = "${var.elasticache_subnets[count.index]}"
availability_zone = "${element(var.azs, count.index)}"

tags = "${merge(map("Name", format("%s-${var.elasticache_subnet_suffix}-%s", var.name, element(var.azs, count.index))), var.elasticache_subnet_tags, var.tags)}"
}

resource "aws_elasticache_subnet_group" "elasticache" {
count = "${var.create_vpc && length(var.elasticache_subnets) > 0 ? 1 : 0}"

name = "${var.name}"
description = "ElastiCache subnet group for ${var.name}"
subnet_ids = ["${aws_subnet.elasticache.*.id}"]
}`

[adamrt]

This can be closed.

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