Terraform-provider-aws: Implement AcceptTransitGatewayVpcAttachment API call

[hashibot[bot]]

_This issue was originally opened by @KundK as hashicorp/terraform#20869. It was migrated here as a result of the provider split. The original body of the issue is below._

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Current Terraform Version

Terraform 0.11.10
AWS provider 2.4.0

Use-cases

When creating a aws_ec2_transit_gateway_vpc_attachment with a shared TGW from another account the attachment goes into 'pendingAcceptance ' state.
It has to be accepted manually on the console or by the AcceptTransitGatewayVpcAttachment API call.
It seems like that API call doesn't have a provider resource.

Attempted Solutions

Proposal

Create data source and resource similar to 'aws_dx_hosted_public_virtual_interface_accepter'

References

https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_AcceptTransitGatewayVpcAttachment.html

[ewbankkit]

For acceptance testing this depends on https://github.com/terraform-providers/terraform-provider-aws/issues/7601, https://github.com/terraform-providers/terraform-provider-aws/pull/8259 as the transit gateway must be shared to and accepted in the account to which the transit gateway VPC attachment will be made and accepted.

[ewbankkit]

Suggested syntax for a new aws_ec2_transit_gateway_vpc_attachment_accepter resource (modeled on aws_vpc_peering_connection_accepter):

# Creator
resource "aws_ec2_transit_gateway_vpc_attachment" "example" {
...
}

# Accepter
resource "aws_ec2_transit_gateway_vpc_attachment_accepter" "example" {
  provider = "aws.alternate"

  transit_gateway_attachment_id = "${aws_ec2_transit_gateway_vpc_attachment.example.id}"
}

The exported attributes would be the attributes of the aws_ec2_transit_gateway_vpc_attachment resource:

• transit_gateway_id
• vpc_id
• vpc_owner_id
• subnet_ids
• dns_support
• ipv6_support

[bflad]

Hi folks 👋 A new aws_ec2_transit_gateway_vpc_attachment_accepter resource has been merged and will release with version 2.13.0 of the Terraform AWS Provider, likely later this week. 👍

[bflad]

This has been released in version 2.13.0 of the Terraform AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[hashibot[bot]]

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