从 for_each 中访问模块（避免循环）

Question

我正在使用 for_each 循环创建模块。 我想从模块块中访问前一个模块以获取变量，但由于循环，它阻止了我这样做。

locals{
  deployment_plan = ["a", "b", "c"]
}
module "tier" {
  source = "./modules/deployment"
  for_each = { for tier,data in local.tier_config : tier => data }
  tier_cfg = each.value
  predecessors = [module.tier[local.deployment_plan[index(local.deployment_plan, each.key) - 1]].last_release_phase] : []
}

我在循环访问模块时为模块分配前任时看到错误。 虽然我想访问上一个模块。

Answer 1

在创建module.tier之前，您无法访问它。 因此你得到错误。 在您的情况下，您必须为每个deployment_plan创建 3 个模块：

locals{
  deployment_plan = ["a", "b", "c"]
}
module "tier_a" {
  source = "./modules/deployment"
  for_each = { for tier,data in local.tier_config : tier => data }
  tier_cfg = each.value
  predecessors = []
}

module "tier_b" {
  source = "./modules/deployment"
  for_each = { for tier,data in local.tier_config : tier => data }
  tier_cfg = each.value
  predecessors = [module.tier_a.last_release_phase]
}

module "tier_c" {
  source = "./modules/deployment"
  for_each = { for tier,data in local.tier_config : tier => data }
  tier_cfg = each.value
  predecessors = [module.tier_b.last_release_phase]
}