- `ena_support` (boolean) - Enable enhanced networking (ENA but not SriovNetSupport) on HVM-compatible AMIs. If set, add `ec2:ModifyInstanceAttribute` to your AWS IAM policy. Note: you must make sure enhanced networking is enabled on your instance. See [Amazon's documentation on enabling enhanced networking](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html#enabling_enhanced_networking). - `sriov_support` (bool) - Enable enhanced networking (SriovNetSupport but not ENA) on HVM-compatible AMIs. If true, add `ec2:ModifyInstanceAttribute` to your AWS IAM policy. Note: you must make sure enhanced networking is enabled on your instance. See [Amazon's documentation on enabling enhanced networking](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html#enabling_enhanced_networking). Default `false`. - `ebs_volumes` (BlockDevices) - Add the block device mappings to the AMI. If you add instance store volumes or EBS volumes in addition to the root device volume, the created AMI will contain block device mapping information for those volumes. Amazon creates snapshots of the source instance's root volume and any other EBS volumes described here. When you launch an instance from this new AMI, the instance automatically launches with these additional volumes, and will restore them from snapshots taken from the source instance. See the [BlockDevices](#block-devices-configuration) documentation for fields. - `run_volume_tags` (map[string]string) - Key/value pair tags to apply to the volumes of the instance that is *launched* to create EBS Volumes. These tags will *not* appear in the tags of the resulting EBS volumes unless they're duplicated under `tags` in the `ebs_volumes` setting. This is a [template engine](/docs/templates/engine), see [Build template data](#build-template-data) for more information. Note: The tags specified here will be *temporarily* applied to volumes specified in `ebs_volumes` - but only while the instance is being created. Packer will replace all tags on the volume with the tags configured in the `ebs_volumes` section as soon as the instance is reported as 'ready'. - `run_volume_tag` ([]{key string, value string}) - Same as [`run_volume_tags`](#run_volume_tags) but defined as a singular repeatable block containing a `key` and a `value` field. In HCL2 mode the [`dynamic_block`](/docs/configuration/from-1.5/expressions#dynamic-blocks) will allow you to create those programatically.