Bug Report: Userdata request size limits

[Diskoteket]

Affected Resources

• resource "cloudstack_instance"
• resource "cloudstack_user_data"

Description

I have deployed Apache Cloudstack and I want to create instances with userdata.
My userdata is merely 7544 bytes but when the provider tries to issue a GET method during orchestration the error code 4350 is thrown.

I have tried pasting userdata in the webui and referencing on the instance but the same issue is thrown, see below.

I have tried increasing the vm.userdata.max.length setting from 32768 to 1048576 , but it didn't help.

My userdata:

output "user_data_size_bytes" {
  value = length(base64encode(local.my-vm_cloudinit))
}

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

user_data_size_bytes = 7544

I am not sure what the solution for this is since I have not delved into the code, but in the documentation there seems to be a higher limit for POST method in the API, maybe this could solve this issue?

HTTP GET parameters are limited to a length of 2048 bytes, but it is possible to store larger User Data blobs by sending them in the body via HTTP POST instead of GET.

Provider resource snippets

cloudstack-terraform-provider/cloudstack/resource_cloudstack_instance.go

Line 453 in 16915b6

ud, err := getUserData(userData.(string))

cloudstack-terraform-provider/cloudstack/resource_cloudstack_user_data.go

Line 91 in 16915b6

p := cs.User.NewRegisterUserDataParams(d.Get("name").(string), d.Get("userdata").(string))

Debug output

cloudstack_user_data.my-vm: Creating...
╷
│ Error: Error registering user data: CloudStack API error 431 (CSExceptionErrorCode: 4350): User data is too long for http GET request

cloudstack_instance.my-vm: Creating...
╷
│ Error: Error creating the new instance my-vm: CloudStack API error 431 (CSExceptionErrorCode: 4350): User data is too long for http GET request