如何避免ECS售罄导致部署失败

如下图所示，ECS的c7.large.4 Flavor在可用区3售罄，而在可用区2是有库存的。

推荐在开发模板的过程中，先通过data sources查询某个Region所有可用区可用的flavor，如下所示。

// Query flavors of all az
data "huaweicloud_compute_flavors" "flavors" {
  count = length(data.huaweicloud_availability_zones.az.names)
 
availability_zone = data.huaweicloud_availability_zones.az.names[count.index]
 
  performance_type = var.performance_type
  cpu_core_count   = local.instance_flavor_cpu
  memory_size      = local.instance_flavor_memory
}

然后获取到ECS可用区和该可用区可用ECS flavor的映射关系，如下所示。

# az and available flavors map, such as {cn-north-4a = ["ac7.large.2", "c3ne.large.2"]}
available_flavors_id_maps = { for i, flavor_ids in data.huaweicloud_compute_flavors.flavors[*].ids : data.huaweicloud_availability_zones.az.names[i] => flavor_ids if length(flavor_ids) > 0 }
 
# 获取当前Region可用的可用区
availability_zone = keys(local.available_flavors_id_maps)[0]
 
# 获取可用的ECS Flavor
flavor_id = local.available_flavors_id_maps[local.availability_zone][0]