aws_route: IPv6 Route: Error finding route after creating it

[benrobinsonsonos]

Terraform Version

terraform 0.11.3
terraform-provider-aws_v1.9.0_x4

Affected Resource(s)

Please list the resources as a list, for example:

• aws_route

Terraform Configuration Files

resource "aws_vpc" "vpc" {
  cidr_block = "10.0.0.0/16"
  assign_generated_ipv6_cidr_block = "true"
}

resource "aws_internet_gateway" "igw" {
  vpc_id = "${aws_vpc.vpc.id}"
}

resource "aws_subnet" "pub_sub_a" {
  vpc_id = "${aws_vpc.vpc.id}"
  cidr_block = "10.0.0.0/24"
  availability_zone = "us-east-1a"
}

resource "aws_route_table" "pub_rt" {
  vpc_id = "${aws_vpc.vpc.id}"
}

resource "aws_route_table_association" "pub_rta_a" {
  subnet_id = "${aws_subnet.pub_sub_a.id}"
  route_table_id = "${aws_route_table.pub_rt.id}"
}

resource "aws_route" "pub_rt_def" {
  route_table_id = "${aws_route_table.pub_rt.id}"
  destination_cidr_block = "0.0.0.0/0"
  gateway_id = "${aws_internet_gateway.igw.id}"
  depends_on = ["aws_internet_gateway.igw"]
}

resource "aws_route" "pub_rt_ipv6_def" {
  route_table_id = "${aws_route_table.pub_rt.id}"
  destination_ipv6_cidr_block = "::0/0"
  gateway_id = "${aws_internet_gateway.igw.id}"
  depends_on = ["aws_internet_gateway.igw"]
}

Expected Behavior

IPv6 route should be created and added to the state.

Actual Behavior

Terraform creates IPv6 route that is visible in management console, however, repeats, "Still creating..." until (2m0s elapsed), then returns an error that route couldn't be found after creating it. Repeating 'terraform apply' returns the same results.

• aws_route.pub_rt_ipv6_def: Error finding route after creating it: Unable to find matching route for Route Table (rtb-123456) and destination IPv6 CIDR block (::0/0).

Steps to Reproduce

Please list the steps required to reproduce the issue, for example:

1. terraform apply

[smihajlovic-frame]

@benrobinsonsonos do you have any updates on this? I have similar issues with ipv4 routes

[benrobinsonsonos]

Same behavior observed in terraform-provider-aws_v1.10.0_x4. IPv4 route successfully created and added to the statefile. IPv6 route created, however, output reports "Error finding route after creating it."

[DrFaust92]

I was not able to reproduce this, is this still an issue?

[mmerickel]

I ran into this with a very similar setup. I think the issue is that AWS is canonicalizing the IPv6 route and terraform is not, so terraform is looking for ::0/0 and AWS made a route for ::/0 and terraform cannot find it after it was created.

[DrFaust92]

Can you share you're config so I'll try to reproduce?

[DrFaust92]

@mmerickel i've dived into the code a bit and it seems you are right

[DrFaust92]

opened #12890 to address this

[bflad]

The fix for this has been merged and will release with version 2.59.0 of the Terraform AWS Provider, likely tomorrow. Thanks to @DrFaust92 for the implementation. 👍

[ghost]

This has been released in version 2.59.0 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 for triage. Thanks!

[ghost]

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 feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!