The cluster_size.tpl file specifies the available parameters for different sizes of LogScale clusters. This template defines various cluster sizes (xsmall, small, medium, large, xlarge) and their associated configurations, including node counts, machine types, disk sizes, and resource limits. The Terraform configuration uses this template to dynamically configure the LogScale deployment based on the selected cluster size.

The data from cluster_size.tpl is retrieved and rendered by the main.tf file. The main configuration uses the jsondecode function to parse the template and select the appropriate cluster size configuration based on the logscale_cluster_size variable.

Example:

# Local Variables
  locals {
    # Render a template of available cluster sizes
    cluster_size_template = jsondecode(templatefile("${path.module}/cluster_size.tpl", {}))
    cluster_size_rendered = {
      for key in keys(local.cluster_size_template) :
      key => local.cluster_size_template[key]
    }
  }

The default environment values set by this Terraform are as follows: