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main.tf
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main.tf
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locals {
enabled = module.this.enabled
instance_count = local.enabled ? 1 : 0
volume_count = var.ebs_volume_count > 0 && local.instance_count > 0 ? var.ebs_volume_count : 0
# create an instance profile if the instance is enabled and we aren't given one to use
instance_profile_count = module.this.enabled && var.instance_profile_enabled && var.instance_profile == "" ? 1 : 0
instance_profile = var.instance_profile_enabled && var.instance_profile != "" ? var.instance_profile : (var.instance_profile_enabled ? one(aws_iam_instance_profile.default[*].name) : "")
security_group_enabled = module.this.enabled && var.security_group_enabled
region = var.region != "" ? var.region : data.aws_region.default.name
root_iops = contains(["io1", "io2", "gp3"], var.root_volume_type) ? var.root_iops : null
ebs_iops = contains(["io1", "io2", "gp3"], var.ebs_volume_type) ? var.ebs_iops : null
root_throughput = var.root_volume_type == "gp3" ? var.root_throughput : null
ebs_throughput = var.ebs_volume_type == "gp3" ? var.ebs_throughput : null
availability_zone = var.availability_zone != "" ? var.availability_zone : data.aws_subnet.default.availability_zone
ami = var.ami != "" ? var.ami : one(data.aws_ami.default[*].image_id)
ami_owner = var.ami != "" ? var.ami_owner : one(data.aws_ami.default[*].owner_id)
root_volume_type = var.root_volume_type != "" ? var.root_volume_type : one(data.aws_ami.info[*].root_device_type)
region_domain = local.region == "us-east-1" ? "compute-1.amazonaws.com" : "${local.region}.compute.amazonaws.com"
eip_public_dns = var.associate_public_ip_address && var.assign_eip_address && module.this.enabled ? "ec2-${replace(one(aws_eip.default[*].public_ip), ".", "-")}.${local.region_domain}" : ""
public_dns = (
var.associate_public_ip_address && var.assign_eip_address && module.this.enabled ?
local.eip_public_dns : one(aws_instance.default[*].public_dns)
)
}
data "aws_caller_identity" "default" {
}
data "aws_region" "default" {
}
data "aws_partition" "default" {
}
data "aws_subnet" "default" {
id = var.subnet
}
data "aws_iam_policy_document" "default" {
statement {
sid = ""
actions = [
"sts:AssumeRole",
]
principals {
type = "Service"
identifiers = ["ec2.amazonaws.com"]
}
effect = "Allow"
}
}
data "aws_ami" "default" {
count = var.ami == "" ? 1 : 0
most_recent = "true"
filter {
name = "name"
values = ["ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-*"]
}
filter {
name = "virtualization-type"
values = ["hvm"]
}
owners = ["099720109477"]
}
data "aws_ami" "info" {
count = var.root_volume_type != "" ? 0 : 1
filter {
name = "image-id"
values = [local.ami]
}
owners = [local.ami_owner]
}
data "aws_iam_instance_profile" "given" {
count = local.enabled && var.instance_profile_enabled && var.instance_profile != "" ? 1 : 0
name = var.instance_profile
}
resource "aws_iam_instance_profile" "default" {
count = var.instance_profile_enabled ? local.instance_profile_count : 0
name = module.this.id
role = one(aws_iam_role.default[*].name)
tags = module.this.tags
}
resource "aws_iam_role" "default" {
count = var.instance_profile_enabled ? local.instance_profile_count : 0
name = module.this.id
path = "/"
assume_role_policy = data.aws_iam_policy_document.default.json
permissions_boundary = var.permissions_boundary_arn
tags = module.this.tags
}
resource "aws_instance" "default" {
#bridgecrew:skip=BC_AWS_GENERAL_31: Skipping `Ensure Instance Metadata Service Version 1 is not enabled` check until BridgeCrew supports conditional evaluation. See https://github.com/bridgecrewio/checkov/issues/793
#bridgecrew:skip=BC_AWS_GENERAL_68: Skipping ebs_optimized check for `true`
#bridgecrew:skip=BC_AWS_NETWORKING_47: Skiping `Ensure AWS EC2 instance is configured with VPC` because it is incorrectly flagging that this instance does not belong to a VPC even though subnet_id is configured.
count = local.instance_count
ami = local.ami
availability_zone = local.availability_zone
instance_type = var.instance_type
ebs_optimized = var.ebs_optimized
disable_api_stop = var.disable_api_stop
disable_api_termination = var.disable_api_termination
user_data = var.user_data
user_data_base64 = var.user_data_base64
user_data_replace_on_change = var.user_data_replace_on_change
iam_instance_profile = local.instance_profile
instance_initiated_shutdown_behavior = var.instance_initiated_shutdown_behavior
associate_public_ip_address = var.external_network_interface_enabled ? null : var.associate_public_ip_address
key_name = var.ssh_key_pair
subnet_id = var.external_network_interface_enabled ? null : var.subnet
monitoring = var.monitoring
private_ip = var.private_ip
secondary_private_ips = var.external_network_interface_enabled ? null : var.secondary_private_ips
source_dest_check = var.external_network_interface_enabled ? null : var.source_dest_check
ipv6_address_count = var.external_network_interface_enabled && var.ipv6_address_count == 0 ? null : var.ipv6_address_count
ipv6_addresses = length(var.ipv6_addresses) == 0 ? null : var.ipv6_addresses
tenancy = var.tenancy
vpc_security_group_ids = var.external_network_interface_enabled ? null : compact(
concat(
formatlist("%s", module.security_group.id),
var.security_groups
)
)
dynamic "network_interface" {
for_each = var.external_network_interface_enabled ? var.external_network_interfaces : []
content {
delete_on_termination = network_interface.value.delete_on_termination
device_index = network_interface.value.device_index
network_card_index = network_interface.value.network_card_index
network_interface_id = network_interface.value.network_interface_id
}
}
root_block_device {
volume_type = local.root_volume_type
volume_size = var.root_volume_size
iops = local.root_iops
throughput = local.root_throughput
delete_on_termination = var.delete_on_termination
encrypted = var.root_block_device_encrypted
kms_key_id = var.root_block_device_kms_key_id
}
metadata_options {
http_endpoint = var.metadata_http_endpoint_enabled ? "enabled" : "disabled"
instance_metadata_tags = var.metadata_tags_enabled ? "enabled" : "disabled"
http_put_response_hop_limit = var.metadata_http_put_response_hop_limit
http_tokens = var.metadata_http_tokens_required ? "required" : "optional"
}
credit_specification {
cpu_credits = var.burstable_mode
}
tags = module.this.tags
volume_tags = var.volume_tags_enabled ? module.this.tags : {}
}
resource "aws_eip" "default" {
#bridgecrew:skip=BC_AWS_NETWORKING_48: Skiping `Ensure all EIP addresses allocated to a VPC are attached to EC2 instances` because it is incorrectly flagging that this instance does not belong to a VPC even though subnet_id is configured.
count = var.associate_public_ip_address && var.assign_eip_address && module.this.enabled ? 1 : 0
instance = one(aws_instance.default[*].id)
tags = module.this.tags
}
resource "aws_ebs_volume" "default" {
count = local.volume_count
availability_zone = local.availability_zone
size = var.ebs_volume_size
iops = local.ebs_iops
throughput = local.ebs_throughput
type = var.ebs_volume_type
tags = module.this.tags
encrypted = var.ebs_volume_encrypted
kms_key_id = var.kms_key_id
}
resource "aws_volume_attachment" "default" {
count = local.volume_count
device_name = var.ebs_device_name[count.index]
volume_id = aws_ebs_volume.default[count.index].id
instance_id = one(aws_instance.default[*].id)
force_detach = var.force_detach_ebs
stop_instance_before_detaching = var.stop_ec2_before_detaching_vol
}