azurerm_route_table with azurerm_route flipping resources

[thiagocaiubi]

Terraform Version

0.10.7

AzureRM Provider Version

0.3.0

Affected Resource(s)

Please list the resources as a list, for example:

• azurerm_route_table
• azurerm_route

Terraform Configuration Files

resource "azurerm_resource_group" "test" {
  name     = "acceptanceTestResourceGroup1"
  location = "West US"
}

resource "azurerm_route_table" "test" {
  name                = "acceptanceTestRouteTable1"
  location            = "${azurerm_resource_group.test.location}"
  resource_group_name = "${azurerm_resource_group.test.name}"
}

resource "azurerm_route" "test" {
  name                = "acceptanceTestRoute1"
  resource_group_name = "${azurerm_resource_group.test.name}"
  route_table_name    = "${azurerm_route_table.test.name}"
  address_prefix      = "10.1.0.0/16"
  next_hop_type       = "vnetlocal"
}

Debug Output

https://gist.github.com/thiagocaiubi/1c39ca2a9e40f866cc8ae3473b273cf1

Expected Behavior

First terraform apply must create the infrastructure.
Second terraform apply must do nothing.

Actual Behavior

Subsequent terraform apply are creating/destroying the resources.

Steps to Reproduce

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

1. terraform init
2. terraform apply
3. terraform apply

References

I guess is something related to the refactoring from Set to List.
Pretty sure that I'm facing the same issue with azurerm_network_security_group and azurerm_network_security_rule.

• azurerm_route / azurerm_route_table - additions #402

[thiagocaiubi]

I've tested the same HCL against terraform v0.10.7 and azurerm provider v0.2.2 and get the expected behavior successfully.

Debug output: https://gist.github.com/thiagocaiubi/4030764cf958207a125c28e9e856253e

[fstuck37]

I appear to have this issue as well.
I'm adding a default route via azurerm_route and when I do a subsequent plan it wants to delete it from the azurerm_route_table. If I apply, allow it to remove it, and than plan again; it wants to add it based on azurerm_route. So it is flipping the route between the azurerm_route and azurerm_route_table.

~ module.vnet.azurerm_route_table.privrt
route.#: "1" => "0"
route.0.address_prefix: "0.0.0.0/0" => ""
route.0.name: "DefaultGateway" => ""
route.0.next_hop_type: "VirtualAppliance" => ""

I'm using 0.10.7 as well and Azure provider 0.3.1.
(terraform-provider-azurerm_v0.3.1_x4.exe)
I didn't have this issue with a previous version v0.1.7.
(terraform-provider-azurerm_v0.1.7_x4.exe)

Still reviewing to see if I can work around it and will provide additional information if I find any.

Thanks,
Fred

[VaijanathB]

Hello @thiagocaiubi ,

Since you have already confirmed that this is no longer an issue, can you please go ahead and close this.

Thanks,
VJ

[fstuck37]

VJ,
I still have this issue. I think thiagocaiubi was saying that this issue didn't exist in an older version (Terraform v0.10.7 and azurerm provider v0.2.2) and for me, I didn't have this issue with Azure version v0.1.7.

Seems like this issue was introduced between v0.2.2 and v0.3.0.
(v0.2.2 < v?.?.? <= v0.3.0)

Hope this helps

Thanks,
Fred

[thiagocaiubi]

Thanks, @fstuck37. That's it!

[VaijanathB]

Hello @thiagocaiubi , @fstuck37 ,

Thanks for the clarification. I tried the above repro provided by @thiagocaiubi , with Terraform version 0.10.9 and Azure provider version 0.3.2 and could not reproduce it.
When I perform, tf apply multiple times I get the following output.
tf apply
Apply complete! Resources: 0 added, 0 changed, 0 destroyed.
tf apply
Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

If this is still an issue with latest version of Terraform and provider, can you provide with me updated repro steps ?

Thanks,
VJ

[fstuck37]

@VaijanathB - seems like v0.3.2 fixes the issue. Not sure what caused it but looks better now.
Thanks,
Fred

[thiagocaiubi]

Hi @VaijanathB .

I've tested with terraform v0.10.8 and azurerm provider v0.3.2 and it worked as expected. I will now close the issue. Thanks!

PS: You mentioned terraform v0.10.9, I'm afraid it doesn't exists.
https://github.com/hashicorp/terraform/blob/f25d08061d8c68a5e205f0e82b8bab8c30afc63f/CHANGELOG.md

[clarkcode]

@thiagocaiubi
Seeing the same issue:
Terraform v0.12.0
azurerm v1.30

• First-time plan + apply works as expected.
• Second plan sets the azurerm_route.example-route for destroy.

Example:

resource "azurerm_resource_group" "example-rsg" {
    name     = "example-rsg"
    location = "uksouth"
}

resource "azurerm_virtual_network" "example-vnet" {
    name                = "example-vnet"
    location            = "uksouth"
    resource_group_name = "example-rsg"
    address_space       = ["10.0.0.0/24"]
}

resource "azurerm_subnet" "example-subnet" {
    name                        = "example-subnet"
    resource_group_name         = "example-rsg"
    virtual_network_name        = "${azurerm_virtual_network.example-vnet.name}"
    address_prefix              = "10.0.0.0/24"
    route_table_id              = "${azurerm_route_table.example-udr.id}"
    lifecycle { 
        ignore_changes = ["route_table_id"]
    }
}

resource "azurerm_route_table" "example-udr" {
    name                = "example-udr"
    location            = "uksouth"
    resource_group_name = "example-rsg"
    route {
        name           = "default-route"
        address_prefix = "0.0.0.0/0"
        next_hop_type  = "Internet"
    }
}

resource "azurerm_subnet_route_table_association" "perimeter-subnet-association" {
  subnet_id                 = "${azurerm_subnet.example-subnet.id}"
  route_table_id            = "${azurerm_route_table.example-udr.id}"
}

resource "azurerm_route" "example-route" {
    name                    = "example-route"
    resource_group_name     = "example-rsg"
    route_table_name        = "${azurerm_route_table.example-udr.name}"
    address_prefix          = "192.168.0.0/24"
    next_hop_type           = "VirtualAppliance"
    next_hop_in_ip_address  = "10.0.0.1"
}

[ghost]

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