[BUG] `rancher2_etcd_backup` is not populating the Kubernetes version when creating a snapshot

[markusewalker]

Rancher Server Setup

• Rancher version: v2.8.0
• Installation option (Docker install/Helm Chart): Docker
  • If Helm Chart, Kubernetes Cluster and version (RKE1, RKE2, k3s, EKS, etc): RKE1
• Proxy/Cert Details:

Information about the Cluster

• Kubernetes version: v1.27.8-rancher2-1
• Cluster Type (Local/Downstream): Downstream
  • If downstream, what type of cluster? (Custom/Imported or specify provider for Hosted/Infrastructure Provider): Linode

User Information

• What is the role of the user logged in? (Admin/Cluster Owner/Cluster Member/Project Owner/Project Member/Custom) Cluster Owner
  • If custom, define the set of permissions:

Provider Information

• What is the version of the Rancher v2 Terraform Provider in use? 3.2.0
• What is the version of Terraform in use? v1.6.6

Describe the bug

When using the rancher2_etcd_backup resource block with a provisioned RKE1 downstream cluster, the ETCD snapshot is created as expected. However, the issue is that the kubernetesVersion does not get populated as expected. This causes issues as when you attempt to restore the created snapshot, you are unable to do so as you receive an error.

To Reproduce

1. Setup Rancher.
2. Provision an RKE1 downstream cluster as a standard user using the rancher2_cluster resource block.
3. Once provisioned, use the rancher2_etcd_backup resource block; validate that the Kubernetes version is blank.
4. See the below main.tf as a reference:

terraform {
  required_providers {
    rancher2 = {
      source  = "rancher/rancher2"
      version = "3.2.0"
    }
  }
}

provider "rancher2" {
  api_url   = var.rancher_api_url
  token_key = var.rancher_admin_bearer_token
  insecure  = true
}

########################
# CREATE RKE1 CLUSTER
########################
resource "rancher2_cluster" "cluster" {
  name                                                       = var.cluster_name
  default_pod_security_admission_configuration_template_name = var.default_pod_security_admission_configuration_template_name
  rke_config {
    kubernetes_version = var.kubernetes_version
    network {
      plugin = var.network_plugin
    }
  }
}

########################
# CREATE ROLE TEMPLATE
########################
resource "rancher2_cluster_role_template_binding" "cluster_role_template_binding" {
  name             = "security-issue"
  cluster_id       = rancher2_cluster.cluster.id
  role_template_id = "projects-view"
  user_id          = "u-c6ll8"
}

########################
# CREATE NODE TEMPLATE
########################
resource "rancher2_node_template" "node_template" {
  name = var.node_template_name
  amazonec2_config {
    access_key     = var.aws_access_key
    secret_key     = var.aws_secret_key
    ami            = var.aws_ami
    region         = var.aws_region
    security_group = [var.aws_security_group_name]
    subnet_id      = var.aws_subnet_id
    vpc_id         = var.aws_vpc_id
    zone           = var.aws_zone
    root_size      = var.aws_root_size
    instance_type  = var.aws_instance_type
  }
}

########################
# CREATE ETCD NODE POOL
########################
resource "rancher2_node_pool" "etcd_node_pool" {
  cluster_id       = rancher2_cluster.cluster.id
  name             = var.etcd_node_pool_name
  hostname_prefix  = var.node_hostname_prefix
  node_template_id = rancher2_node_template.node_template.id
  quantity         = var.etcd_node_pool_quantity
  control_plane    = false
  etcd             = true
  worker           = false
}

########################
# CREATE CP NODE POOL
########################
resource "rancher2_node_pool" "control_plane_node_pool" {
  cluster_id       = rancher2_cluster.cluster.id
  name             = var.control_plane_node_pool_name
  hostname_prefix  = var.node_hostname_prefix
  node_template_id = rancher2_node_template.node_template.id
  quantity         = var.control_plane_node_pool_quantity
  control_plane    = true
  etcd             = false
  worker           = false
}

########################
# CREATE WORKER NODE POOL
########################
resource "rancher2_node_pool" "worker_node_pool" {
  cluster_id       = rancher2_cluster.cluster.id
  name             = var.worker_node_pool_name
  hostname_prefix  = var.node_hostname_prefix
  node_template_id = rancher2_node_template.node_template.id
  quantity         = var.worker_node_pool_quantity
  control_plane    = false
  etcd             = false
  worker           = true
}

########################
# CREATE ETCD BACKUP
########################
resource "rancher2_etcd_backup" "etcd_backup" {
  backup_config {
    enabled = true
    interval_hours = 20
    retention = 10
  }
  cluster_id = rancher2_cluster.cluster.id
  manual = true
  name = var.backup_name
}

Actual Result

Creating an etcd backup should successfully populate the Kubernetes version.

Expected Result

Creating an etcd backup DOES NOT populate the Kubernetes version.