terraform/website/source/docs/providers/aws/r/launch_config.html.markdown

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---
layout: "aws"
page_title: "AWS: aws_launch_configuration"
sidebar_current: "docs-aws-resource-launch-config"
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description: |-
Provides a resource to create a new launch configuration, used for autoscaling groups.
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---
# aws\_launch\_configuration
Provides a resource to create a new launch configuration, used for autoscaling groups.
## Example Usage
```
resource "aws_launch_configuration" "as_conf" {
name = "web_config"
image_id = "ami-1234"
instance_type = "m1.small"
}
```
## Argument Reference
The following arguments are supported:
* `name` - (Required) The name of the launch configuration.
* `image_id` - (Required) The EC2 image ID to launch.
* `instance_type` - (Required) The size of instance to launch.
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* `iam_instance_profile` - (Optional) The IAM instance profile to associate
with launched instances.
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* `key_name` - (Optional) The key name that should be used for the instance.
* `security_groups` - (Optional) A list of associated security group IDS.
* `associate_public_ip_address` - (Optional) Associate a public ip address with an instance in a VPC.
* `user_data` - (Optional) The user data to provide when launching the instance.
* `block_device_mapping` - (Optional) A list of block devices to add. Their keys are documented below.
<a id="block-devices"></a>
## Block devices
Each of the `*_block_device` attributes controls a portion of the AWS
Launch Configuration's "Block Device Mapping". It's a good idea to familiarize yourself with [AWS's Block Device
Mapping docs](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/block-device-mapping-concepts.html)
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](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-io-characteristics.html).
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](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-io-characteristics.html).
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 `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](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceStorage.html#InstanceStoreDeviceNames)
(e.g. `"ephemeral0"`)
Each AWS Instance type has a different set of Instance Store block devices
available for attachment. AWS [publishes a
list](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceStorage.html#StorageOnInstanceTypes)
of which ephemeral devices are available on each type. The devices are always
identified by the `virtual_name` in the format `"ephemeral{0..N}"`.
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## Attributes Reference
The following attributes are exported:
* `id` - The ID of the launch configuration.