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AWS CloudFormation
User Guide (API Version 2010-05-15)

AWS Documentation » AWS CloudFormation » User Guide » Template Reference » AWS Resource Types Reference » AWS::EC2::Volume

AWS::EC2::Volume

The AWS::EC2::Volume type creates a new Amazon Elastic Block Store (Amazon EBS) volume.

Important

When you use AWS CloudFormation to update an Amazon EBS volume that modifies Iops, Size, or VolumeType, there is a cooldown period before another operation can occur. This can cause your stack to report being in UPDATE_IN_PROGRESS or UPDATE_ROLLBACK_IN_PROGRESS for long periods of time.

Some common scenarios when you might encounter a cooldown period for Amazon EBS include:

  • You successfully update an Amazon EBS volume and the update succeeds. When you attempt another update within the cooldown window, that update will be subject to a cooldown period.

  • You successfully update an Amazon EBS volume and the update succeeds but another change in your update-stack call fails. The rollback will be subject to a cooldown period.

For more information on the cooldown period, see Considerations for Modifying EBS Volumes in the Amazon EBS Developer Guide.

To control how AWS CloudFormation handles the volume when the stack is deleted, set a deletion policy for your volume. You can choose to retain the volume, to delete the volume, or to create a snapshot of the volume. For more information, see DeletionPolicy Attribute.

Note

If you set a deletion policy that creates a snapshot, all tags on the volume are included in the snapshot.

Important

Amazon EBS does not support sizing down an Amazon EBS volume. AWS CloudFormation will not attempt to modify an Amazon EBS volume to a smaller size on rollback.

Topics

Syntax

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

JSON

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{
   "Type":"AWS::EC2::Volume",
   "Properties" : {
      "AutoEnableIO" : Boolean,
      "AvailabilityZone" : String,
      "Encrypted" : Boolean,
      "Iops" : Number,
      "KmsKeyId" : String,
      "Size" : Integer,
      "SnapshotId" : String,
      "Tags" : [ Resource Tag, ... ],
      "VolumeType" : String
   }
}

YAML

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Type: "AWS::EC2::Volume"
Properties:
  AutoEnableIO: Boolean
  AvailabilityZone: String
  Encrypted: Boolean
  Iops: Number
  KmsKeyId: String
  Size: Integer
  SnapshotId: String
  Tags:
    - Resource Tag
  VolumeType: String

Properties

AutoEnableIO

Indicates whether the volume is auto-enabled for I/O operations. By default, Amazon EBS disables I/O to the volume from attached EC2 instances when it determines that a volume's data is potentially inconsistent. If the consistency of the volume is not a concern, and you prefer that the volume be made available immediately if it's impaired, you can configure the volume to automatically enable I/O. For more information, see Working with the AutoEnableIO Volume Attribute in the Amazon EC2 User Guide for Linux Instances.

Required: No

Type: Boolean

Update requires: No interruption

AvailabilityZone

The Availability Zone in which to create the new volume.

Required: Yes

Type: String

Update requires: Updates are not supported.

Encrypted

Indicates whether the volume is encrypted. You can attach encrypted Amazon EBS volumes only to instance types that support Amazon EBS encryption. Volumes that are created from encrypted snapshots are automatically encrypted. You can't create an encrypted volume from an unencrypted snapshot, or vice versa. If your AMI uses encrypted volumes, you can launch the AMI only on supported instance types. For more information, see Amazon EBS encryption in the Amazon EC2 User Guide for Linux Instances.

Required: Conditional. If you specify the KmsKeyId property, you must enable encryption.

Type: Boolean

Update requires: Updates are not supported.

Iops

The number of I/O operations per second (IOPS) that the volume supports. For more information about the valid sizes for each volume type, see the Iops parameter for the CreateVolume action in the Amazon EC2 API Reference.

Required: Conditional. Required when the volume type is io1; not used with other volume types.

Type: Number

Update requires: No interruption

KmsKeyId

The Amazon Resource Name (ARN) of the AWS Key Management Service master key that is used to create the encrypted volume, such as arn:aws:kms:us-east-2:012345678910:key/abcd1234-a123-456a-a12b-a123b4cd56ef. If you create an encrypted volume and don't specify this property, AWS CloudFormation uses the default master key.

Required: No

Type: String

Update requires: Updates are not supported.

Size

The size of the volume, in gibibytes (GiBs). For more information about the valid sizes for each volume type, see the Size parameter for the CreateVolume action in the Amazon EC2 API Reference.

If you specify the SnapshotId property, specify a size that is equal to or greater than the size of the snapshot. If you don't specify a size, EC2 uses the size of the snapshot as the volume size.

Required: Conditional. If you don't specify a value for the SnapshotId property, you must specify this property.

Type: Integer

Update requires: No interruption

SnapshotId

The snapshot from which to create the new volume.

Required: No

Type: String

Update requires: Updates are not supported.

Tags

An arbitrary set of tags (key–value pairs) for this volume.

Required: No

Type: AWS CloudFormation Resource Tags

Update requires: No interruption

VolumeType

The volume type. If you set the type to io1, you must also set the Iops property. For valid values, see the VolumeType parameter for the CreateVolume action in the Amazon EC2 API Reference.

Required: No

Type: String

Update requires: No interruption

Return Values

Ref

When you specify an AWS::EC2::Volume type as an argument to the Ref function, AWS CloudFormation returns the volume's physical ID. For example: vol-5cb85026.

For more information about using the Ref function, see Ref.

Examples

Example Encrypted Amazon EBS Volume with DeletionPolicy to Make a Snapshot on Delete

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"NewVolume" : {
   "Type" : "AWS::EC2::Volume",
   "Properties" : {
      "Size" : "100",
      "Encrypted" : "true",
      "AvailabilityZone" : { "Fn::GetAtt" : [ "Ec2Instance", "AvailabilityZone" ] },
      "Tags" : [ {
         "Key" : "MyTag",
         "Value" : "TagValue"
      } ]
   },
   "DeletionPolicy" : "Snapshot"
}

Example Amazon EBS Volume with 100 Provisioned IOPS

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"NewVolume" : {
   "Type" : "AWS::EC2::Volume",
   "Properties" : {
     "Size" : "100",
     "VolumeType" : "io1",
     "Iops" : "100",
     "AvailabilityZone" : { "Fn::GetAtt" : [ "EC2Instance", "AvailabilityZone" ] }
   }
}

More Info