Changing size of Kubernikus cluster causes error

[UncleIS]

Hi!

When I try to resize a pool inside of a Kubernikus cluster (change the number of instances), an error message is emitted.

Terraform Version

Terraform v0.11.8

• provider.ccloud (unversioned)
• provider.openstack (unversioned)

Affected Resource(s)

• ccloud_kubernetes

Terraform Configuration Files

02_varibales.tf

# Define variables to be used in resource definitions
variable "name_prefix" {}

variable "private_subnet_cidr" {}
variable "private_subnet_ipv" {}

variable "k8s_pool1_name" {}
variable "k8s_pool1_flavor" {}
variable "k8s_pool1_size" {}

variable "sg_default_name" {}

23_main_k8s.tf

# k8s
resource "ccloud_kubernetes" "k8s" {
  name           = "${var.name_prefix}"
  ssh_public_key = "<some_key>"

  node_pools = [
    { 
      name   = "${var.k8s_pool1_name}"
      flavor = "${var.k8s_pool1_flavor}"
      size   = "${var.k8s_pool1_size}"
    },    
  ]

  depends_on = [
    "openstack_networking_router_v2.kuberouter",
    "openstack_networking_router_interface_v2.kuberouter_interface",
  ]
}

conf/qa.tfvars

name_prefix = "uxp-qa"

private_subnet_cidr = "10.180.0.0/24"
private_subnet_ipv = 4

k8s_pool1_name = "pool1"
k8s_pool1_flavor = "m1.4xlarge"
k8s_pool1_size = 3

sg_default_name = "default"

Debug Output

https://gist.github.com/UncleIS/615649bca972be5cf99f7e9bff8743e2

Expected Behavior

The number of instances in the pool should have been updated.

Actual Behavior

An error was thrown:

Terraform will perform the following actions:

  ~ ccloud_kubernetes.k8s
      node_pools.0.size: "4" => "3"


Plan: 0 to add, 1 to change, 0 to destroy.

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

ccloud_kubernetes.k8s: Modifying... (ID: uxp-qa)
  node_pools.0.size: "4" => "3"

Error: Error applying plan:

1 error(s) occurred:

* ccloud_kubernetes.k8s: 1 error(s) occurred:

* ccloud_kubernetes.k8s: Error updating cluster: method PUT is not allowed, but [POST,GET] are

Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

Steps to Reproduce

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

1. Update the amount of instances that form a Kubenikus cluster pool
2. Run 'terraform apply'

Important Factoids

Running in SAP Converged Cloud offering