如何覆盖Terraform模块中的资源？

Question

我有一个像这样的Terraform模块:

module "helloworld" {
  source = ../service"
}

并../service包含:

resource "aws_cloudwatch_metric_alarm" "cpu_max" {
  comparison_operator = "GreaterThanOrEqualToThreshold"
  evaluation_periods  = "2"
  ... etc
}

如何覆盖service变量comparison_operator和evaluation_periods模块？

例如设置cpu_max为4是否像aws_cloudwatch_metric_alarm .cpu_max.evaluation_periods = 4模块一样简单？

Answer 1

您必须使用variable带有默认值的a.

variable "evaluation_periods" {
    default = 4
}

resource "aws_cloudwatch_metric_alarm" "cpu_max" {
  comparison_operator = "GreaterThanOrEqualToThreshold"
  evaluation_periods  = "${var.evaluation_periods}"
}

在你的模块中

module "helloworld" {
  source = ../service"
  evaluation_periods = 2
}