AWS::EC2::Instance Ebs - AWS CloudFormation
SyntaxPropertiesExamplesSee also

AWS::EC2::Instance Ebs

Specifies a block device for an EBS volume.

Ebs is a property of the BlockDeviceMapping property type.

Important

After the instance is running, you can modify only the DeleteOnTermination parameters for the attached volumes without interrupting the instance. Modifying any other parameter results in instance replacement.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{
  "DeleteOnTermination" : Boolean,
  "Encrypted" : Boolean,
  "Iops" : Integer,
  "KmsKeyId" : String,
  "SnapshotId" : String,
  "VolumeSize" : Integer,
  "VolumeType" : String
}

YAML

  DeleteOnTermination: Boolean
  Encrypted: Boolean
  Iops: Integer
  KmsKeyId: String
  SnapshotId: String
  VolumeSize: Integer
  VolumeType: String

Properties

DeleteOnTermination

Indicates whether the EBS volume is deleted on instance termination. For more information, see Preserving Amazon EBS volumes on instance termination in the Amazon EC2 User Guide.

Required: No

Type: Boolean

Update requires: Some interruptions

Encrypted

Indicates whether the volume should be encrypted. The effect of setting the encryption state to true depends on the volume origin (new or from a snapshot), starting encryption state, ownership, and whether encryption by default is enabled. For more information, see Encryption by default in the Amazon Elastic Compute Cloud User Guide.

Encrypted Amazon EBS volumes must be attached to instances that support Amazon EBS encryption. For more information, see Supported instance types.

Important

After the instance is running, modifying this parameter results in instance replacement.

Required: No

Type: Boolean

Update requires: Some interruptions

Iops

The number of I/O operations per second (IOPS). For gp3, io1, and io2 volumes, this represents the number of IOPS that are provisioned for the volume. For gp2 volumes, this represents the baseline performance of the volume and the rate at which the volume accumulates I/O credits for bursting.

The following are the supported values for each volume type:

  • gp3: 3,000-16,000 IOPS

  • io1: 100-64,000 IOPS

  • io2: 100-64,000 IOPS

For io1 and io2 volumes, we guarantee 64,000 IOPS only for Instances built on the Nitro System. Other instance families guarantee performance up to 32,000 IOPS.

This parameter is required for io1 and io2 volumes. The default for gp3 volumes is 3,000 IOPS. This parameter is not supported for gp2, st1, sc1, or standard volumes.

Important

After the instance is running, modifying this parameter results in instance replacement.

Required: Conditional

Type: Integer

Update requires: Some interruptions

KmsKeyId

The identifier of the AWS KMS key to use for Amazon EBS encryption. If KmsKeyId is specified, the encrypted state must be true. If the encrypted state is true but you do not specify KmsKeyId, your KMS key for EBS is used.

You can specify the KMS key using any of the following:

  • Key ID. For example, 1234abcd-12ab-34cd-56ef-1234567890ab.

  • Key alias. For example, alias/ExampleAlias.

  • Key ARN. For example, arn:aws:kms:us-west-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab.

  • Alias ARN. For example, arn:aws:kms:us-west-2:111122223333:alias/ExampleAlias.

Important

After the instance is running, modifying this parameter results in instance replacement.

Required: No

Type: String

Update requires: Some interruptions

SnapshotId

The ID of the snapshot.

If you specify both SnapshotId and VolumeSize, VolumeSize must be equal or greater than the size of the snapshot.

Important

After the instance is running, modifying this parameter results in instance replacement.

Required: Conditional

Type: String

Update requires: Some interruptions

VolumeSize

The size of the volume, in GiBs. You must specify either a snapshot ID or a volume size. If you specify a snapshot, the default is the snapshot size. You can specify a volume size that is equal to or larger than the snapshot size.

The following are the supported volumes sizes for each volume type:

  • gp2 and gp3:1-16,384

  • io1 and io2: 4-16,384

  • st1 and sc1: 125-16,384

  • standard: 1-1,024

Important

After the instance is running, modifying this parameter results in instance replacement.

Required: Conditional

Type: Integer

Update requires: Some interruptions

VolumeType

The volume type. For more information, see Amazon EBS volume types in the Amazon EC2 User Guide. If the volume type is io1 or io2, you must specify the IOPS that the volume supports.

Important

After the instance is running, modifying this parameter results in instance replacement.

Required: No

Type: String

Allowed values: standard | io1 | io2 | gp2 | sc1 | st1 | gp3

Update requires: Some interruptions

Examples

Create an EBS volume from a snapshot

This example creates a 50GB io1 EBS volume from a snapshot, and configures it to support 1000 IOPS and to persist after terminating the instance to which it is attached.

JSON

{
    "DeviceName": "/dev/sdc",
    "Ebs": {
        "SnapshotId": "snap-xxxxxxxx",
        "VolumeSize": "50",
        "VolumeType": "io1",
        "Iops": "1000",
        "DeleteOnTermination": "false"
    }
}

YAML

BlockDeviceMappings:
  - DeviceName: /dev/sdc
    Ebs:
      SnapshotId: snap-xxxxxxxx
      VolumeSize: 50
      VolumeType: io1
      Iops: 1000
      DeleteOnTermination: false

See also