r/aws_ec2_transit_gateway_route_table_association: Add configurable timeouts

[trh-ds]

Description

aws_ec2_transit_gateway_route_table_association waited on a hard-coded 5 minute create timeout, with no way for users to extend it. As reported in #42705, associations can legitimately take ~10 minutes, so the apply fails even though the association eventually succeeds:

Error: waiting for EC2 Transit Gateway Route Table Association (tgw-rtb-…_tgw-attach-…) create:
timeout while waiting for state to become 'associated' (last state: 'associating', timeout: 5m0s)

This adds a timeouts block to the resource. The previously hard-coded durations become the defaults, so behavior is unchanged unless a user opts in:

resource "aws_ec2_transit_gateway_route_table_association" "example" {
  transit_gateway_attachment_id  = aws_ec2_transit_gateway_vpc_attachment.example.id
  transit_gateway_route_table_id = aws_ec2_transit_gateway_route_table.example.id

  timeouts {
    create = "15m"
  }
}

Implementation notes:

• waitTransitGatewayRouteTableAssociationCreated / …Deleted and disassociateTransitGatewayRouteTable now take a timeout time.Duration, following the existing convention in this package (e.g. waitTransitGatewayUpdated).
• Only the resource itself passes d.Timeout(...). The shared helpers used by the attachment resources (transitgateway_vpc_attachment.go, transitgateway_vpc_attachment_accepter.go, transitgateway_connect.go) and transitgateway_policy_table_association.go pass the pre-existing transitGatewayRouteTableAssociation{Created,Deleted}Timeout constants, so those code paths are untouched.

Relations

Closes #42705

References

• Transit Gateway route table association docs

Output from Acceptance Testing

I do not have an AWS account available to run the Transit Gateway acceptance tests, so I have not run them. The change is limited to plumbing a configurable duration into the existing waiters; the defaults are byte-for-byte the previous constants, so TestAccTransitGatewayRouteTableAssociation_* should be unaffected. Happy to add a timeouts-specific test case if a maintainer would like one.

$ make testacc TESTS=TestAccTransitGatewayRouteTableAssociation PKG=ec2
# not run — no AWS credentials available

GenAI / LLM Assisted Development

This change was written with the assistance of Claude Code. I have reviewed the diff.

[github-actions]

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[github-actions]

✅ Thank you for correcting the previously detected issues! The maintainers appreciate your efforts to make the review process as smooth as possible.

[justinretzolk]

Relates #42738