hcloud-server-tf/main.tf

locals {
  cloudflare_zones = {
    for zone in try(data.cloudflare_zones.zones, []) : zone.zones[0].name => zone.zones[0].id
  }
}

locals {
  ucs_zones = {
    for zone in try(data.restapi_object.ucs_zones, []) : zone.api_data.id => zone.api_data.dn
  }
}

locals {
  server_volumes = flatten([
    for server_key, server in var.server : [
      for volume_key, volume in try(server.volumes, []) : {
        volume_name = volume.name
        volume_size = volume.size
        server_id   = hcloud_server.server[server.name].id
      }
    ]
  ])
}

locals {
  server_domains = flatten([
    for server_key, server in var.server : [
      for domain_key, domain in try(server.domains, []) : {
        record_id    = try(domain.id, domain.name)
        record_name  = domain.name
        record_type  = domain.type
        record_value = domain.value
        record_ttl   = try(domain.ttl, 1)
        zone_id      = local.cloudflare_zones[try(domain.zone_name, var.server_dns_zone)]
      }
    ]
  ])
}

resource "hcloud_placement_group" "group" {
  for_each = { for key, row in var.server : row.name => row if contains(keys(row), "placement_group") }

  name = each.value.placement_group
  type = "spread"
}

resource "hcloud_server" "server" {
  for_each   = { for row in var.server : row.name => row }
  depends_on = [hcloud_ssh_key.key]

  name               = each.value.name
  server_type        = try(each.value.type, "cx11")
  image              = try(each.value.image, "rocky-9")
  datacenter         = try(each.value.datacenter, "fsn1-dc14")
  ssh_keys           = var.server_keys
  backups            = try(each.value.backups, true)
  keep_disk          = try(each.value.keep_disk, false)
  placement_group_id = try(hcloud_placement_group.group[each.value.placement_group].id, null)

  lifecycle {
    ignore_changes = [ssh_keys]
  }

  labels = merge(
    {
      provisioner = "terraform"
      project     = var.hcloud_project
    },
    {
      for index, service in try(each.value.services, []) : "service_${index + 1}" => service
    },
    {
      for index, group in try(each.value.groups, []) : "group_${index + 1}" => group
    },
    try(each.value.labels, {})
  )
}

resource "hcloud_volume" "volume" {
  for_each = { for row in local.server_volumes : row.volume_name => row }

  name      = each.value.volume_name
  size      = each.value.volume_size
  server_id = each.value.server_id
}

resource "hcloud_ssh_key" "key" {
  for_each = { for row in toset(var.ssh_keys) : element(split(" ", row), 2) => row }

  name       = each.key
  public_key = "${element(split(" ", each.value), 0)} ${element(split(" ", each.value), 1)}"
}

resource "hcloud_rdns" "serverv4" {
  for_each = { for row in var.server : row.name => row }

  server_id  = hcloud_server.server[each.value.name].id
  ip_address = hcloud_server.server[each.value.name].ipv4_address
  dns_ptr    = "${each.value.name}.${try(each.value.dns_zone, var.server_dns_zone)}"
}

resource "hcloud_rdns" "serverv6" {
  for_each = { for row in var.server : row.name => row }

  server_id  = hcloud_server.server[each.value.name].id
  ip_address = hcloud_server.server[each.value.name].ipv6_address
  dns_ptr    = "${each.value.name}.${try(each.value.dns_zone, var.server_dns_zone)}"
}

resource "cloudflare_record" "serverv4" {
  for_each = { for row in var.server : row.name => row }

  zone_id = local.cloudflare_zones[try(each.value.dns_zone, var.server_dns_zone)]
  name    = each.value.name
  value   = hcloud_server.server[each.value.name].ipv4_address
  type    = "A"
  ttl     = 1
}

resource "cloudflare_record" "serverv6" {
  for_each = { for row in var.server : row.name => row }

  zone_id = local.cloudflare_zones[try(each.value.dns_zone, var.server_dns_zone)]
  name    = each.value.name
  value   = hcloud_server.server[each.value.name].ipv6_address
  type    = "AAAA"
  ttl     = 1
}

resource "cloudflare_record" "record" {
  for_each = { for row in local.server_domains : row.record_id => row }

  zone_id = each.value.zone_id
  name    = each.value.record_name
  value   = each.value.record_value
  type    = each.value.record_type
  ttl     = each.value.record_ttl
}

resource "restapi_object" "ucs_server" {
  for_each = { for row in var.server : row.name => row }

  path = "/dns/host_record/"
  data = jsonencode({
    "position" : local.ucs_zones[try(each.value.dns_zone, var.server_dns_zone)],
    "properties" : {
      "name" : each.value.name,
      "a" : [
        hcloud_server.server[each.value.name].ipv4_address,
        hcloud_server.server[each.value.name].ipv6_address,
      ],
    }
  })
}