network_card_index support in aws_instance and aws_network_interface_attachment

[nkorobko]

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Description

Missing network_card_index attribute in network_interface block. This is needed in order to create ec2 nodes that have more than 1 network card (dl1.24xlarge). Due to the fact that you can not attach more than 1 EFA on a single network card - it is impossible to create an ec2 from dl1.24xlarge type with 4 EFA adapters attached using aws_instance. The only workaround for this is to create aws_launch_template, where network_card_index is supported in the network_interface block

New or Affected Resource(s)

• aws_instance
• aws_network_interface_attachment

Potential Terraform Configuration

Currently, this is only supported by aws_launch_template. I would like to see this support in aws_instance and in aws_network_interface_attachment

 network_interfaces {
    network_interface_id        = var.mgmt_efa_host_list[2]
    device_index                = 2
    **network_card_index**          = 2
  }

References

https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/instance#network-interfaces
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/launch_template#network-interfaces

• #0000

[ewbankkit]

device_index is already available in the aws_network_interface_attachment resource: https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/network_interface_attachment#device_index

[ewbankkit]

Relates: #21147.

[nkorobko]

@ewbankkit yes, I'm aware of that, the missing attribute is network_card_index. This is not the same as device_index

[github-actions]

This functionality has been released in v4.11.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[zeroflaw]

When using network_interface block in aws_spot_instance_request i'm now getting the error:

Error: Error requesting spot instances: UnknownParameter: The parameter NetworkCardIndex is not recognized │ status code: 400, request id: 904aa9a5-fc2f-4668-b9a4-4fc0e8cef3e5

I'm not sure how to work around the issue.

Seems related to boto/boto3#2897 (comment)

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.