Terraform Infrastructure as Code (IaC) - AWS Vpc Module

Table of Contents

• Introduction
• Usage
• Module Inputs
• Module Outputs
• Authors
• License

Introduction

This Terraform module creates structured vpc for AWS resources with specific attributes.

Usage

• Use the module by referencing its source and providing the required variables.

module "vpc" {
  source                              = "git::https://github.com/yadavprakash/terraform-aws-vpc.git?ref=v1.0.0"
  name                                = "app"
  environment                         = "test"
  cidr_block                          = "10.0.0.0/16"
  enable_flow_log                     = true # Flow logs will be stored in cloudwatch log group. Variables passed in default.
  create_flow_log_cloudwatch_iam_role = true
  additional_cidr_block               = ["172.3.0.0/16", "172.2.0.0/16"]
  dhcp_options_domain_name            = "service.consul"
  dhcp_options_domain_name_servers    = ["127.0.0.1", "10.10.0.2"]
}

Please ensure you specify the correct 'source' path for the module.

Examples

For detailed examples on how to use this module, please refer to the Example directory within this repository.

Authors

Your Name Replace '[License Name]' and '[Your Name]' with the appropriate license and your information. Feel free to expand this README with additional details or usage instructions as needed for your specific use case.

License

This project is licensed under the MIT License - see the LICENSE file for details.

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Requirements

Name	Version
terraform	>= 1.5.4
aws	>= 5.32.1

Providers

Name	Version
aws	>= 5.32.1

Modules

Name	Source	Version
labels	git::https://github.com/yadavprakash/terraform-aws-labels.git	v1.0.0

Resources

Name	Type
aws_cloudwatch_log_group.flow_log	resource
aws_default_network_acl.default	resource
aws_default_route_table.default	resource
aws_default_security_group.default	resource
aws_egress_only_internet_gateway.default	resource
aws_flow_log.vpc_flow_log	resource
aws_iam_policy.vpc_flow_log_cloudwatch	resource
aws_iam_role.vpc_flow_log_cloudwatch	resource
aws_iam_role_policy_attachment.vpc_flow_log_cloudwatch	resource
aws_internet_gateway.default	resource
aws_kms_alias.kms-alias	resource
aws_kms_key.kms	resource
aws_kms_key_policy.example	resource
aws_s3_bucket.mybucket	resource
aws_s3_bucket_acl.example	resource
aws_s3_bucket_ownership_controls.example	resource
aws_s3_bucket_policy.block-http	resource
aws_s3_bucket_public_access_block.example	resource
aws_s3_bucket_server_side_encryption_configuration.example	resource
aws_vpc.default	resource
aws_vpc_dhcp_options.vpc_dhcp	resource
aws_vpc_dhcp_options_association.this	resource
aws_vpc_ipv4_cidr_block_association.default	resource
aws_caller_identity.current	data source
aws_iam_policy_document.flow_log_cloudwatch_assume_role	data source
aws_iam_policy_document.vpc_flow_log_cloudwatch	data source
aws_region.current	data source

Inputs

Name	Description	Type	Default	Required
additional_cidr_block	List of secondary CIDR blocks of the VPC.	list(string)	[]	no
assign_generated_ipv6_cidr_block	Requests an Amazon-provided IPv6 CIDR block with a /56 prefix length for the VPC. You cannot specify the range of IP addresses, or the size of the CIDR block. Conflicts with ipv6_ipam_pool_id	bool	true	no
aws_default_network_acl	A boolean flag to enable/disable Default Network acl in the VPC.	bool	true	no
aws_default_route_table	A boolean flag to enable/disable Default Route Table in the VPC.	bool	true	no
block_http_traffic	True when http traffic has to be blocked for S3.	bool	true	no
cidr_block	CIDR for the VPC.	string	""	no
create_flow_log_cloudwatch_iam_role	Flag to be set true when cloudwatch iam role is to be created when flow log destination type is set to cloudwatch logs.	bool	false	no
default_network_acl_egress	List of maps of egress rules to set on the Default Network ACL	list(map(string))	[ { "action": "allow", "cidr_block": "0.0.0.0/0", "from_port": 0, "protocol": "-1", "rule_no": 100, "to_port": 0 }, { "action": "allow", "from_port": 0, "ipv6_cidr_block": "::/0", "protocol": "-1", "rule_no": 101, "to_port": 0 } ]	no
default_network_acl_ingress	List of maps of ingress rules to set on the Default Network ACL	list(map(string))	[ { "action": "allow", "cidr_block": "0.0.0.0/0", "from_port": 0, "protocol": "-1", "rule_no": 100, "to_port": 0 }, { "action": "allow", "from_port": 0, "ipv6_cidr_block": "::/0", "protocol": "-1", "rule_no": 101, "to_port": 0 } ]	no
default_route_table_routes	Configuration block of routes.	list(map(string))	[]	no
default_security_group_egress	List of maps of egress rules to set on the default security group	list(map(string))	[]	no
default_security_group_ingress	List of maps of ingress rules to set on the default security group	list(map(string))	[]	no
dhcp_options_domain_name	Specifies DNS name for DHCP options set (requires enable_dhcp_options set to true)	string	"service.consul"	no
dhcp_options_domain_name_servers	Specify a list of DNS server addresses for DHCP options set, default to AWS provided (requires enable_dhcp_options set to true)	list(string)	[ "AmazonProvidedDNS" ]	no
dhcp_options_netbios_name_servers	Specify a list of netbios servers for DHCP options set (requires enable_dhcp_options set to true)	list(string)	[]	no
dhcp_options_netbios_node_type	Specify netbios node_type for DHCP options set (requires enable_dhcp_options set to true)	string	""	no
dhcp_options_ntp_servers	Specify a list of NTP servers for DHCP options set (requires enable_dhcp_options set to true)	list(string)	[]	no
dns_hostnames_enabled	A boolean flag to enable/disable DNS hostnames in the VPC.	bool	true	no
dns_support_enabled	A boolean flag to enable/disable DNS support in the VPC.	bool	true	no
enable	Flag to control the vpc creation.	bool	true	no
enable_dhcp_options	Should be true if you want to specify a DHCP options set with a custom domain name, DNS servers, NTP servers, netbios servers, and/or netbios server type	bool	false	no
enable_flow_log	Enable vpc_flow_log logs.	bool	false	no
enable_key_rotation	Specifies whether key rotation is enabled. Defaults to true(security best practice)	bool	true	no
enable_network_address_usage_metrics	Determines whether network address usage metrics are enabled for the VPC	bool	null	no
enabled_ipv6_egress_only_internet_gateway	A boolean flag to enable/disable IPv6 Egress-Only Internet Gateway creation	bool	true	no
environment	Environment (e.g. prod, dev, staging).	string	""	no
flow_log_cloudwatch_log_group_retention_in_days	Specifies the number of days you want to retain log events in the specified log group for VPC flow logs	number	null	no
flow_log_destination_arn	ARN of destination where vpc flow logs are to stored. Can be of existing s3 or existing cloudwatch log group.	string	null	no
flow_log_destination_type	Type of flow log destination. Can be s3 or cloud-watch-logs	string	"cloud-watch-logs"	no
flow_log_file_format	(Optional) The format for the flow log. Valid values: plain-text, parquet	string	null	no
flow_log_hive_compatible_partitions	(Optional) Indicates whether to use Hive-compatible prefixes for flow logs stored in Amazon S3	bool	false	no
flow_log_iam_role_arn	The ARN for the IAM role that's used to post flow logs to a CloudWatch Logs log group. When flow_log_destination_arn is set to ARN of Cloudwatch Logs, this argument needs to be provided	string	null	no
flow_log_log_format	The fields to include in the flow log record, in the order in which they should appear	string	null	no
flow_log_max_aggregation_interval	The maximum interval of time during which a flow of packets is captured and aggregated into a flow log record. Valid Values: 60 seconds or 600 seconds	number	600	no
flow_log_per_hour_partition	(Optional) Indicates whether to partition the flow log per hour. This reduces the cost and response time for queries	bool	false	no
flow_log_traffic_type	The type of traffic to capture. Valid values: ACCEPT, REJECT, ALL	string	"ALL"	no
flow_logs_bucket_name	Name (e.g. mybucket or bucket101).	string	null	no
instance_tenancy	A tenancy option for instances launched into the VPC.	string	"default"	no
ipam_pool_enable	Flag to be set true when using ipam for cidr.	bool	false	no
ipv4_ipam_pool_id	The ID of an IPv4 IPAM pool you want to use for allocating this VPC's CIDR.	string	""	no
ipv4_netmask_length	The netmask length of the IPv4 CIDR you want to allocate to this VPC. Requires specifying a ipv4_ipam_pool_id	string	null	no
ipv6_cidr_block	IPv6 CIDR for the VPC.	string	null	no
ipv6_cidr_block_network_border_group	Set this to restrict advertisement of public addresses to a specific Network Border Group such as a LocalZone.	string	null	no
ipv6_ipam_pool_id	The ID of an IPv6 IPAM pool you want to use for allocating this VPC's CIDR.	string	null	no
ipv6_netmask_length	The netmask length of the IPv4 CIDR you want to allocate to this VPC. Requires specifying a ipv6_ipam_pool_id	string	null	no
kms_key_deletion_window	KMS Key deletion window in days.	number	10	no
label_order	Label order, e.g. name,application.	list(any)	[ "name", "environment" ]	no
managedby	ManagedBy, eg 'yadavprakash'	string	""	no
name	Name (e.g. app or cluster).	string	""	no
repository	Terraform current module repo	string	""	no
restrict_default_sg	Flag to control the restrict default sg creation.	bool	true	no
s3_sse_algorithm	Server-side encryption algorithm to use. Valid values are AES256 and aws:kms	string	"aws:kms"	no
vpc_flow_log_permissions_boundary	The ARN of the Permissions Boundary for the VPC Flow Log IAM Role	string	null	no

Outputs

Name	Description
arn	Amazon Resource Name (ARN) of VPC
id	The ID of the VPC.
igw_id	The ID of the Internet Gateway.
ipv6_cidr_block	The IPv6 CIDR block.
ipv6_cidr_block_network_border_group	The IPv6 Network Border Group Zone name
ipv6_egress_only_igw_id	The ID of the egress-only Internet Gateway
tags	A mapping of tags to assign to the resource.
vpc_arn	The ARN of the VPC
vpc_cidr_block	The CIDR block of the VPC.
vpc_default_network_acl_id	The ID of the network ACL created by default on VPC creation.
vpc_default_route_table_id	The ID of the route table created by default on VPC creation.
vpc_default_security_group_id	The ID of the security group created by default on VPC creation.
vpc_ipv6_association_id	The association ID for the IPv6 CIDR block.
vpc_main_route_table_id	The ID of the main route table associated with this VPC.