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aws AWS: aws_instance docs-aws-resource-instance Provides an EC2 instance resource. This allows instances to be created, updated, and deleted. Instances also support provisioning.

aws_instance

Provides an EC2 instance resource. This allows instances to be created, updated, and deleted. Instances also support provisioning.

Example Usage

# Create a new instance of the ami-1234 on an m1.small node
# with an AWS Tag naming it "HelloWorld"
resource "aws_instance" "web" {
    ami = "ami-1234"
    instance_type = "m1.small"
    tags {
        Name = "HelloWorld"
    }
}

Argument Reference

The following arguments are supported:

  • ami - (Required) The AMI to use for the instance.
  • availability_zone - (Optional) The AZ to start the instance in.
  • placement_group - (Optional) The Placement Group to start the instance in.
  • ebs_optimized - (Optional) If true, the launched EC2 instance will be EBS-optimized.
  • instance_type - (Required) The type of instance to start
  • key_name - (Optional) The key name to use for the instance.
  • security_groups - (Optional) A list of security group names to associate with. If you are within a non-default VPC, you'll need to use vpc_security_group_ids instead.
  • vpc_security_group_ids - (Optional) A list of security group IDs to associate with.
  • subnet_id - (Optional) The VPC Subnet ID to launch in.
  • associate_public_ip_address - (Optional) Associate a public ip address with an instance in a VPC.
  • private_ip - (Optional) Private IP address to associate with the instance in a VPC.
  • source_dest_check - (Optional) Controls if traffic is routed to the instance when the destination address does not match the instance. Used for NAT or VPNs. Defaults true.
  • user_data - (Optional) The user data to provide when launching the instance.
  • iam_instance_profile - (Optional) The IAM Instance Profile to launch the instance with.
  • tags - (Optional) A mapping of tags to assign to the resource.
  • root_block_device - (Optional) Customize details about the root block device of the instance. See Block Devices below for details.
  • ebs_block_device - (Optional) Additional EBS block devices to attach to the instance. See Block Devices below for details.
  • ephemeral_block_device - (Optional) Customize Ephemeral (also known as "Instance Store") volumes on the instance. See Block Devices below for details.

Block devices

Each of the *_block_device attributes controls a portion of the AWS Instance's "Block Device Mapping". It's a good idea to familiarize yourself with AWS's Block Device Mapping docs to understand the implications of using these attributes.

The root_block_device mapping supports the following:

  • volume_type - (Optional) The type of volume. Can be "standard", "gp2", or "io1". (Default: "standard").
  • volume_size - (Optional) The size of the volume in gigabytes.
  • iops - (Optional) The amount of provisioned IOPS. This must be set with a volume_type of "io1".
  • delete_on_termination - (Optional) Whether the volume should be destroyed on instance termination (Default: true).

Modifying any of the root_block_device settings requires resource replacement.

Each ebs_block_device supports the following:

  • device_name - The name of the device to mount.
  • snapshot_id - (Optional) The Snapshot ID to mount.
  • volume_type - (Optional) The type of volume. Can be "standard", "gp2", or "io1". (Default: "standard").
  • volume_size - (Optional) The size of the volume in gigabytes.
  • iops - (Optional) The amount of provisioned IOPS. This must be set with a volume_type of "io1".
  • delete_on_termination - (Optional) Whether the volume should be destroyed on instance termination (Default: true).
  • encrypted - (Optional) Enables EBS encryption on the volume (Default: false).

Modifying any ebs_block_device currently requires resource replacement.

Each ephemeral_block_device supports the following:

  • device_name - The name of the block device to mount on the instance.
  • virtual_name - The Instance Store Device Name (e.g. "ephemeral0")

Each AWS Instance type has a different set of Instance Store block devices available for attachment. AWS publishes a list of which ephemeral devices are available on each type. The devices are always identified by the virtual_name in the format "ephemeral{0..N}".

~> NOTE: Currently, changes to *_block_device configuration of existing resources cannot be automatically detected by Terraform. After making updates to block device configuration, resource recreation can be manually triggered by using the taint command.

Attributes Reference

The following attributes are exported:

  • id - The instance ID.
  • availability_zone - The availability zone of the instance.
  • placement_group - The placement group of the instance.
  • key_name - The key name of the instance
  • private_dns - The Private DNS name of the instance
  • private_ip - The private IP address.
  • public_dns - The public DNS name of the instance
  • public_ip - The public IP address.
  • security_groups - The associated security groups.
  • vpc_security_group_ids - The associated security groups in non-default VPC
  • subnet_id - The VPC subnet ID.