Example of creative loops and local variables, here updating Flatcar Container Linux images in a vSphere Content Library

flatcar_content.tf

variable "flatcar_stages" {
  type = list(string)
  default = [ "stable", "beta", "lts" ]
}

data "http" "flatcar_version_data" {
  for_each = toset(var.flatcar_stages)

  url = "https://${each.key}.release.flatcar-linux.net/amd64-usr/current/version.txt"
}

locals {
  flatcar_versions = { for k, v in data.http.flatcar_version_data:
    k => regex("FLATCAR_VERSION=(\\S+)", v.response_body)[0]
  }
}

output "flatcar_versions" {
  value = local.flatcar_versions
}

resource "vsphere_content_library_item" "flatcar" {
  for_each = local.flatcar_versions

  name        = "flatcar-production-${each.key}"
  description = "Flatcar Container Linux (${each.value}) - Channel ${each.key}"
  file_url    = "https://${each.key}.release.flatcar-linux.net/amd64-usr/${each.value}/flatcar_production_vmware_ova.ova"
  library_id  = resource.vsphere_content_library.kubernetes.id
}