Image / Attribute / block_device_mappings
block_device_mappings#
- EC2.Image.block_device_mappings#
(list) –
Any block device mapping entries.
(dict) –
Describes a block device mapping, which defines the EBS volumes and instance store volumes to attach to an instance at launch.
Ebs (dict) –
Parameters used to automatically set up EBS volumes when the instance is launched.
DeleteOnTermination (boolean) –
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.
Iops (integer) –
The number of I/O operations per second (IOPS). For
gp3
,io1
, andio2
volumes, this represents the number of IOPS that are provisioned for the volume. Forgp2
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 IOPSio1
: 100 - 64,000 IOPSio2
: 100 - 256,000 IOPS
For
io2
volumes, you can achieve up to 256,000 IOPS on instances built on the Nitro System. On other instances, you can achieve performance up to 32,000 IOPS.This parameter is required for
io1
andio2
volumes. The default forgp3
volumes is 3,000 IOPS.SnapshotId (string) –
The ID of the snapshot.
VolumeSize (integer) –
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 sizes for each volume type:
gp2
andgp3
: 1 - 16,384 GiBio1
: 4 - 16,384 GiBio2
: 4 - 65,536 GiBst1
andsc1
: 125 - 16,384 GiBstandard
: 1 - 1024 GiB
VolumeType (string) –
The volume type. For more information, see Amazon EBS volume types in the Amazon EBS User Guide.
KmsKeyId (string) –
Identifier (key ID, key alias, key ARN, or alias ARN) of the customer managed KMS key to use for EBS encryption.
This parameter is only supported on
BlockDeviceMapping
objects called by RunInstances, RequestSpotFleet, and RequestSpotInstances.Throughput (integer) –
The throughput that the volume supports, in MiB/s.
This parameter is valid only for
gp3
volumes.Valid Range: Minimum value of 125. Maximum value of 1000.
OutpostArn (string) –
The ARN of the Outpost on which the snapshot is stored.
This parameter is not supported when using CreateImage.
Encrypted (boolean) –
Indicates whether the encryption state of an EBS volume is changed while being restored from a backing snapshot. 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 Amazon EBS encryption in the Amazon EBS User Guide.In no case can you remove encryption from an encrypted volume.
Encrypted volumes can only be attached to instances that support Amazon EBS encryption. For more information, see Supported instance types.
This parameter is not returned by DescribeImageAttribute.
For CreateImage and RegisterImage, whether you can include this parameter, and the allowed values differ depending on the type of block device mapping you are creating.
If you are creating a block device mapping for a new (empty) volume, you can include this parameter, and specify either
true
for an encrypted volume, orfalse
for an unencrypted volume. If you omit this parameter, it defaults tofalse
(unencrypted).If you are creating a block device mapping from an existing encrypted or unencrypted snapshot, you must omit this parameter. If you include this parameter, the request will fail, regardless of the value that you specify.
If you are creating a block device mapping from an existing unencrypted volume, you can include this parameter, but you must specify
false
. If you specifytrue
, the request will fail. In this case, we recommend that you omit the parameter.If you are creating a block device mapping from an existing encrypted volume, you can include this parameter, and specify either
true
orfalse
. However, if you specifyfalse
, the parameter is ignored and the block device mapping is always encrypted. In this case, we recommend that you omit the parameter.
NoDevice (string) –
To omit the device from the block device mapping, specify an empty string. When this property is specified, the device is removed from the block device mapping regardless of the assigned value.
DeviceName (string) –
The device name (for example,
/dev/sdh
orxvdh
).VirtualName (string) –
The virtual device name (
ephemeral``N). Instance store volumes are numbered starting from 0. An instance type with 2 available instance store volumes can specify mappings for ``ephemeral0
andephemeral1
. The number of available instance store volumes depends on the instance type. After you connect to the instance, you must mount the volume.NVMe instance store volumes are automatically enumerated and assigned a device name. Including them in your block device mapping has no effect.
Constraints: For M3 instances, you must specify instance store volumes in the block device mapping for the instance. When you launch an M3 instance, we ignore any instance store volumes specified in the block device mapping for the AMI.