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Allow for enabling IPv6 in VPCs #1193

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Allow for enabling IPv6 in VPCs #1193

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6afa462
enable ipv6 support in subnets and add ipv6 cidrs
johnseekins-pathccm Dec 5, 2024
bb17b01
allow for disabling IPv6 selectively
johnseekins-pathccm Dec 5, 2024
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8 changes: 6 additions & 2 deletions modules/vpc/main.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,8 @@ locals {
security_group_ids = [module.endpoint_security_groups[local.interface_endpoint_security_group_key].id]
subnet_ids = module.subnets.private_subnet_ids
} }

vpc_ipv6_cidr_blocks = compact(concat([module.vpc.vpc_ipv6_cidr_block], module.vpc.additional_ipv6_cidr_blocks))
}

module "utils" {
Expand Down Expand Up @@ -114,7 +116,7 @@ module "endpoint_security_groups" {
to_port = 65535
protocol = "-1" # allow ping
cidr_blocks = compact(concat([module.vpc.vpc_cidr_block], module.vpc.additional_cidr_blocks))
ipv6_cidr_blocks = compact(concat([module.vpc.vpc_ipv6_cidr_block], module.vpc.additional_ipv6_cidr_blocks))
ipv6_cidr_blocks = local.vpc_ipv6_cidr_blocks
description = "Ingress from VPC to ${each.value}"
}]
}
Expand Down Expand Up @@ -145,7 +147,9 @@ module "subnets" {
availability_zone_ids = local.availability_zone_ids
ipv4_cidr_block = [module.vpc.vpc_cidr_block]
ipv4_cidrs = var.ipv4_cidrs
ipv6_enabled = false
ipv6_enabled = length(local.vpc_ipv6_cidr_blocks) > 0
disable_private_ipv6 = var.disable_private_ipv6
disable_public_ipv6 = var.disable_public_ipv6
igw_id = var.public_subnets_enabled ? [module.vpc.igw_id] : []
map_public_ip_on_launch = var.map_public_ip_on_launch
max_subnet_count = local.max_subnet_count
Expand Down
12 changes: 12 additions & 0 deletions modules/vpc/variables.tf
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Expand Up @@ -89,6 +89,18 @@ variable "ipv4_cidrs" {
}
}

variable "disable_private_ipv6" {
type = bool
default = false
description = "Allow for selectively disabling IPv6 addresses in private subnets only"
}

variable "disable_private_ipv6" {
type = bool
default = false
description = "Allow for selectively disabling IPv6 addresses in public subnets only"
}

variable "assign_generated_ipv6_cidr_block" {
type = bool
description = "When `true`, assign AWS generated IPv6 CIDR block to the VPC. Conflicts with `ipv6_ipam_pool_id`."
Expand Down