Terraform Drift detection - no changes have been made

[lpossamai]

Hi!

I'm having a bit of a problem where Terraform things that it needs to add existing aws_route, and it fails to do so because it already exists.

I'm using the following:

module "module_depends_on" {
  count  = terraform.workspace == "prod" ? 1 : 0
  source = "github.com/grem11n/terraform-aws-vpc-peering"

  depends_on = [
    module.vpc.private_route_table_ids,
    module.vpc.private_route_table_ids,
    module.vpc
  ]

  providers = {
    aws.this = aws
    aws.peer = aws.peer
  }

  this_vpc_id  = module.vpc.vpc_id
  peer_vpc_id  = var.peer_vpc_id
  this_rts_ids = module.vpc.private_route_table_ids
  peer_rts_ids = var.peer_vpc_rts_ids

  auto_accept_peering = true

}

No changes both to the Terraform code nor to the AWS VPC have been done.

terraform state list returns the following:

module.module_depends_on[0].data.aws_caller_identity.peer
module.module_depends_on[0].data.aws_caller_identity.this
module.module_depends_on[0].data.aws_region.peer
module.module_depends_on[0].data.aws_region.this
module.module_depends_on[0].data.aws_route_tables.peer_vpc_rts
module.module_depends_on[0].data.aws_route_tables.this_vpc_rts
module.module_depends_on[0].data.aws_vpc.peer_vpc
module.module_depends_on[0].data.aws_vpc.this_vpc
module.module_depends_on[0].aws_route.this_routes[0]
module.module_depends_on[0].aws_route.this_routes[1]
module.module_depends_on[0].aws_route.this_routes[2]
module.module_depends_on[0].aws_vpc_peering_connection.this
module.module_depends_on[0].aws_vpc_peering_connection_accepter.peer_accepter
module.module_depends_on[0].aws_vpc_peering_connection_options.accepter
module.module_depends_on[0].aws_vpc_peering_connection_options.this

terraform plan returns the following:

 Terraform will perform the following actions:
  # module.module_depends_on[0].aws_route.peer_routes[0] will be created
+ resource "aws_route" "peer_routes" {
+destination_cidr_block    = "10.0.0.0/18"
+id                        = (known after apply)
+instance_id               = (known after apply)
+instance_owner_id         = (known after apply)
+network_interface_id      = (known after apply)
+origin                    = (known after apply)
+route_table_id            = "rtb-532bf737"
+state                     = (known after apply)
+vpc_peering_connection_id = "pcx-06_____b"
    }
  # module.module_depends_on[0].aws_route.peer_routes[1] will be created
+ resource "aws_route" "peer_routes" {
+destination_cidr_block    = "10.0.0.0/18"
+id                        = (known after apply)
+instance_id               = (known after apply)
+instance_owner_id         = (known after apply)
+network_interface_id      = (known after apply)
+origin                    = (known after apply)
+route_table_id            = "rtb-5c2bf738"
+state                     = (known after apply)
+vpc_peering_connection_id = "pcx-06_____b"
    }
  # module.module_depends_on[0].aws_route.peer_routes[2] will be created
+ resource "aws_route" "peer_routes" {
+destination_cidr_block    = "10.0.0.0/18"
+id                        = (known after apply)
+instance_id               = (known after apply)
+instance_owner_id         = (known after apply)
+network_interface_id      = (known after apply)
+origin                    = (known after apply)
+route_table_id            = "rtb-5d2bf739"
+state                     = (known after apply)
+vpc_peering_connection_id = "pcx-06_____b"
    }
  # module.module_depends_on[0].aws_route.peer_routes[3] will be created
+ resource "aws_route" "peer_routes" {
+destination_cidr_block    = "10.0.0.0/18"
+id                        = (known after apply)
+instance_id               = (known after apply)
+instance_owner_id         = (known after apply)
+network_interface_id      = (known after apply)
+origin                    = (known after apply)
+route_table_id            = "rtb-5e2bf73a"
+state                     = (known after apply)
+vpc_peering_connection_id = "pcx-06_____b"
    }
Plan: 4 to add, 0 to change, 0 to destroy.

Terraform version: What Terraform version do you use? 1.1.5

Module version: What module version do you use? latest

Do you have any suggestions on how to fix this?

[lpossamai]

After trying to import the resource again to Terraform, I was able to. Closing this issue.