AWS EC2 Instance Terraform module

Terraform module which creates an EC2 instance on AWS.

Usage

Single EC2 Instance

module "ec2_instance" {
  source  = "terraform-aws-modules/ec2-instance/aws"

  name = "single-instance"

  instance_type          = "t2.micro"
  key_name               = "user1"
  monitoring             = true
  vpc_security_group_ids = ["sg-12345678"]
  subnet_id              = "subnet-eddcdzz4"

  tags = {
    Terraform   = "true"
    Environment = "dev"
  }
}

Multiple EC2 Instance

module "ec2_instance" {
  source  = "terraform-aws-modules/ec2-instance/aws"

  for_each = toset(["one", "two", "three"])

  name = "instance-${each.key}"

  instance_type          = "t2.micro"
  key_name               = "user1"
  monitoring             = true
  vpc_security_group_ids = ["sg-12345678"]
  subnet_id              = "subnet-eddcdzz4"

  tags = {
    Terraform   = "true"
    Environment = "dev"
  }
}

Spot EC2 Instance

module "ec2_instance" {
  source  = "terraform-aws-modules/ec2-instance/aws"

  name = "spot-instance"

  create_spot_instance = true
  spot_price           = "0.60"
  spot_type            = "persistent"

  instance_type          = "t2.micro"
  key_name               = "user1"
  monitoring             = true
  vpc_security_group_ids = ["sg-12345678"]
  subnet_id              = "subnet-eddcdzz4"

  tags = {
    Terraform   = "true"
    Environment = "dev"
  }
}

Module wrappers

Users of this Terraform module can create multiple similar resources by using for_each meta-argument within module block which became available in Terraform 0.13.

Users of Terragrunt can achieve similar results by using modules provided in the wrappers directory, if they prefer to reduce amount of configuration files.

Examples

• Complete EC2 instance
• EC2 instance w/ private network access via Session Manager
• EC2 instance with EBS volume attachment

Make an encrypted AMI for use

This module does not support encrypted AMI's out of the box however it is easy enough for you to generate one for use

This example creates an encrypted image from the latest ubuntu 16.04 base image.

provider "aws" {
  region = "us-west-2"
}

data "aws_ami" "ubuntu" {
  most_recent = true
  owners      = ["679593333241"]

  filter {
    name   = "name"
    values = ["ubuntu-minimal/images/hvm-ssd/ubuntu-focal-20.04-*"]
  }

  filter {
    name   = "virtualization-type"
    values = ["hvm"]
  }
}

resource "aws_ami_copy" "ubuntu_encrypted_ami" {
  name              = "ubuntu-encrypted-ami"
  description       = "An encrypted root ami based off ${data.aws_ami.ubuntu.id}"
  source_ami_id     = data.aws_ami.ubuntu.id
  source_ami_region = "eu-west-2"
  encrypted         = true

  tags = { Name = "ubuntu-encrypted-ami" }
}

data "aws_ami" "encrypted-ami" {
  most_recent = true

  filter {
    name   = "name"
    values = [aws_ami_copy.ubuntu_encrypted_ami.id]
  }

  owners = ["self"]
}

Conditional creation

The following combinations are supported to conditionally create resources:

• Disable resource creation (no resources created):

  create = false

• Create spot instance:

  create_spot_instance = true

Notes

• network_interface can't be specified together with vpc_security_group_ids, associate_public_ip_address, subnet_id. See complete example for details.
• Changes in ebs_block_device argument will be ignored. Use aws_volume_attachment resource to attach and detach volumes from AWS EC2 instances. See this example.
• In regards to spot instances, you must grant the AWSServiceRoleForEC2Spot service-linked role access to any custom KMS keys, otherwise your spot request and instances will fail with bad parameters. You can see more details about why the request failed by using the awscli and aws ec2 describe-spot-instance-requests

Requirements

Name	Version
terraform	>= 1.0
aws	>= 4.66

Providers

Name	Version
aws	>= 4.66

Modules

No modules.

Resources

Name	Type
aws_iam_instance_profile.this	resource
aws_iam_role.this	resource
aws_iam_role_policy_attachment.this	resource
aws_instance.ignore_ami	resource
aws_instance.this	resource
aws_spot_instance_request.this	resource
aws_iam_policy_document.assume_role_policy	data source
aws_partition.current	data source
aws_ssm_parameter.this	data source

Inputs

Name	Description	Type	Default	Required
ami	ID of AMI to use for the instance	string	null	no
ami_ssm_parameter	SSM parameter name for the AMI ID. For Amazon Linux AMI SSM parameters see reference	string	"/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2"	no
associate_public_ip_address	Whether to associate a public IP address with an instance in a VPC	bool	null	no
availability_zone	AZ to start the instance in	string	null	no
capacity_reservation_specification	Describes an instance's Capacity Reservation targeting option	any	{}	no
cpu_core_count	Sets the number of CPU cores for an instance	number	null	no
cpu_credits	The credit option for CPU usage (unlimited or standard)	string	null	no
cpu_options	Defines CPU options to apply to the instance at launch time.	any	{}	no
cpu_threads_per_core	Sets the number of CPU threads per core for an instance (has no effect unless cpu_core_count is also set)	number	null	no
create	Whether to create an instance	bool	true	no
create_iam_instance_profile	Determines whether an IAM instance profile is created or to use an existing IAM instance profile	bool	false	no
create_spot_instance	Depicts if the instance is a spot instance	bool	false	no
disable_api_stop	If true, enables EC2 Instance Stop Protection	bool	null	no
disable_api_termination	If true, enables EC2 Instance Termination Protection	bool	null	no
ebs_block_device	Additional EBS block devices to attach to the instance	list(any)	[]	no
ebs_optimized	If true, the launched EC2 instance will be EBS-optimized	bool	null	no
enable_volume_tags	Whether to enable volume tags (if enabled it conflicts with root_block_device tags)	bool	true	no
enclave_options_enabled	Whether Nitro Enclaves will be enabled on the instance. Defaults to false	bool	null	no
ephemeral_block_device	Customize Ephemeral (also known as Instance Store) volumes on the instance	list(map(string))	[]	no
get_password_data	If true, wait for password data to become available and retrieve it	bool	null	no
hibernation	If true, the launched EC2 instance will support hibernation	bool	null	no
host_id	ID of a dedicated host that the instance will be assigned to. Use when an instance is to be launched on a specific dedicated host	string	null	no
iam_instance_profile	IAM Instance Profile to launch the instance with. Specified as the name of the Instance Profile	string	null	no
iam_role_description	Description of the role	string	null	no
iam_role_name	Name to use on IAM role created	string	null	no
iam_role_path	IAM role path	string	null	no
iam_role_permissions_boundary	ARN of the policy that is used to set the permissions boundary for the IAM role	string	null	no
iam_role_policies	Policies attached to the IAM role	map(string)	{}	no
iam_role_tags	A map of additional tags to add to the IAM role/profile created	map(string)	{}	no
iam_role_use_name_prefix	Determines whether the IAM role name (iam_role_name or name) is used as a prefix	bool	true	no
ignore_ami_changes	Whether changes to the AMI ID changes should be ignored by Terraform. Note - changing this value will result in the replacement of the instance	bool	false	no
instance_initiated_shutdown_behavior	Shutdown behavior for the instance. Amazon defaults this to stop for EBS-backed instances and terminate for instance-store instances. Cannot be set on instance-store instance	string	null	no
instance_tags	Additional tags for the instance	map(string)	{}	no
instance_type	The type of instance to start	string	"t3.micro"	no
ipv6_address_count	A number of IPv6 addresses to associate with the primary network interface. Amazon EC2 chooses the IPv6 addresses from the range of your subnet	number	null	no
ipv6_addresses	Specify one or more IPv6 addresses from the range of the subnet to associate with the primary network interface	list(string)	null	no
key_name	Key name of the Key Pair to use for the instance; which can be managed using the aws_key_pair resource	string	null	no
launch_template	Specifies a Launch Template to configure the instance. Parameters configured on this resource will override the corresponding parameters in the Launch Template	map(string)	{}	no
maintenance_options	The maintenance options for the instance	any	{}	no
metadata_options	Customize the metadata options of the instance	map(string)	{ "http_endpoint": "enabled", "http_put_response_hop_limit": 1, "http_tokens": "optional" }	no
monitoring	If true, the launched EC2 instance will have detailed monitoring enabled	bool	null	no
name	Name to be used on EC2 instance created	string	""	no
network_interface	Customize network interfaces to be attached at instance boot time	list(map(string))	[]	no
placement_group	The Placement Group to start the instance in	string	null	no
private_dns_name_options	Customize the private DNS name options of the instance	map(string)	{}	no
private_ip	Private IP address to associate with the instance in a VPC	string	null	no
putin_khuylo	Do you agree that Putin doesn't respect Ukrainian sovereignty and territorial integrity? More info: https://en.wikipedia.org/wiki/Putin_khuylo!	bool	true	no
root_block_device	Customize details about the root block device of the instance. See Block Devices below for details	list(any)	[]	no
secondary_private_ips	A list of secondary private IPv4 addresses to assign to the instance's primary network interface (eth0) in a VPC. Can only be assigned to the primary network interface (eth0) attached at instance creation, not a pre-existing network interface i.e. referenced in a network_interface block	list(string)	null	no
source_dest_check	Controls if traffic is routed to the instance when the destination address does not match the instance. Used for NAT or VPNs	bool	null	no
spot_block_duration_minutes	The required duration for the Spot instances, in minutes. This value must be a multiple of 60 (60, 120, 180, 240, 300, or 360)	number	null	no
spot_instance_interruption_behavior	Indicates Spot instance behavior when it is interrupted. Valid values are terminate, stop, or hibernate	string	null	no
spot_launch_group	A launch group is a group of spot instances that launch together and terminate together. If left empty instances are launched and terminated individually	string	null	no
spot_price	The maximum price to request on the spot market. Defaults to on-demand price	string	null	no
spot_type	If set to one-time, after the instance is terminated, the spot request will be closed. Default persistent	string	null	no
spot_valid_from	The start date and time of the request, in UTC RFC3339 format(for example, YYYY-MM-DDTHH:MM:SSZ)	string	null	no
spot_valid_until	The end date and time of the request, in UTC RFC3339 format(for example, YYYY-MM-DDTHH:MM:SSZ)	string	null	no
spot_wait_for_fulfillment	If set, Terraform will wait for the Spot Request to be fulfilled, and will throw an error if the timeout of 10m is reached	bool	null	no
subnet_id	The VPC Subnet ID to launch in	string	null	no
tags	A mapping of tags to assign to the resource	map(string)	{}	no
tenancy	The tenancy of the instance (if the instance is running in a VPC). Available values: default, dedicated, host	string	null	no
timeouts	Define maximum timeout for creating, updating, and deleting EC2 instance resources	map(string)	{}	no
user_data	The user data to provide when launching the instance. Do not pass gzip-compressed data via this argument; see user_data_base64 instead	string	null	no
user_data_base64	Can be used instead of user_data to pass base64-encoded binary data directly. Use this instead of user_data whenever the value is not a valid UTF-8 string. For example, gzip-encoded user data must be base64-encoded and passed via this argument to avoid corruption	string	null	no
user_data_replace_on_change	When used in combination with user_data or user_data_base64 will trigger a destroy and recreate when set to true. Defaults to false if not set	bool	null	no
volume_tags	A mapping of tags to assign to the devices created by the instance at launch time	map(string)	{}	no
vpc_security_group_ids	A list of security group IDs to associate with	list(string)	null	no

Outputs

Name	Description
ami	AMI ID that was used to create the instance
arn	The ARN of the instance
availability_zone	The availability zone of the created instance
capacity_reservation_specification	Capacity reservation specification of the instance
ebs_block_device	EBS block device information
ephemeral_block_device	Ephemeral block device information
iam_instance_profile_arn	ARN assigned by AWS to the instance profile
iam_instance_profile_id	Instance profile's ID
iam_instance_profile_unique	Stable and unique string identifying the IAM instance profile
iam_role_arn	The Amazon Resource Name (ARN) specifying the IAM role
iam_role_name	The name of the IAM role
iam_role_unique_id	Stable and unique string identifying the IAM role
id	The ID of the instance
instance_state	The state of the instance
ipv6_addresses	The IPv6 address assigned to the instance, if applicable
outpost_arn	The ARN of the Outpost the instance is assigned to
password_data	Base-64 encoded encrypted password data for the instance. Useful for getting the administrator password for instances running Microsoft Windows. This attribute is only exported if get_password_data is true
primary_network_interface_id	The ID of the instance's primary network interface
private_dns	The private DNS name assigned to the instance. Can only be used inside the Amazon EC2, and only available if you've enabled DNS hostnames for your VPC
private_ip	The private IP address assigned to the instance
public_dns	The public DNS name assigned to the instance. For EC2-VPC, this is only available if you've enabled DNS hostnames for your VPC
public_ip	The public IP address assigned to the instance, if applicable. NOTE: If you are using an aws_eip with your instance, you should refer to the EIP's address directly and not use public_ip as this field will change after the EIP is attached
root_block_device	Root block device information
spot_bid_status	The current bid status of the Spot Instance Request
spot_instance_id	The Instance ID (if any) that is currently fulfilling the Spot Instance request
spot_request_state	The current request state of the Spot Instance Request
tags_all	A map of tags assigned to the resource, including those inherited from the provider default_tags configuration block

Authors

Module is maintained by Anton Babenko with help from these awesome contributors.

License

Apache 2 Licensed. See LICENSE for full details.

Additional information for users from Russia and Belarus

• Russia has illegally annexed Crimea in 2014 and brought the war in Donbas followed by full-scale invasion of Ukraine in 2022.
• Russia has brought sorrow and devastations to millions of Ukrainians, killed hundreds of innocent people, damaged thousands of buildings, and forced several million people to flee.
• Putin khuylo!