Adding support for storage only nodes

[davidliscio]

We have a use case for adding both regular nodes and storage only nodes in a cluster (private-cloud or secondary cluster), we have tested this using a modified version of the private cloud module and would like to have this implemented upstream.

Our solution has been to update the main.tf with a dynamic node type config for both private cloud and cluster modules. This allows for the storage only nodes to be specified in a deployment code with a value of 0 until needed or the config can be omitted.

dynamic "node_type_configs" {
for_each = var.cluster_storage_node_count > 0 ? [1] : []
content {
node_type_id = var.cluster_storage_node_type
node_count = var.cluster_storage_node_count
}
}

Added variables for storage only nodes:
variable "cluster_storage_node_type" {
type = string
description = "Specify the node type for the management cluster in the private cloud"
default = "storage-only-standard-72"
}
variable "cluster_storage_node_count" {
type = number
description = "Specify the number of nodes for the management cluster in the private cloud"
default = 0
}