使用 Terraform 设置 CW 磁盘使用警报

Question

寻找了一段时间，但没有成功。

我正在尝试使用 terraform 设置磁盘使用百分比的 CW 警报，但我获得的数据不足。

我已经设置了这样的警报：

    resource "aws_cloudwatch_metric_alarm" "ec2_disk_space" {
    for_each            = local.disk_space_path
    alarm_name          = "ec2_disk_space_${each.key}"
    comparison_operator = "GreaterThanOrEqualToThreshold"
    metric_name         = "disk_used_percent"
    namespace           = "CloudWatchCustomMetrics"
    period              = "600"
    evaluation_periods  = "1"
    statistic           = "Average"
    threshold           = "90"
    alarm_description   = "The disk space on path ${each.key} average percentage is over 90% for the last 10 minutes"
    actions_enabled     = "true"
    treat_missing_data  = "ignore"
    alarm_actions       = [aws_sns_topic.aws-notification-terraform.arn]
    ok_actions          = [aws_sns_topic.aws-notification-terraform.arn]
    dimensions = {
      InstanceId    = var.instance_ids
      path          = each.key
    }
  }

其中“路径”经过我收集的有关使用 CWAgent 的指标的几条路径。 instanceID 是我的实例 ID 的变量。

我收到在 CloudWatch 警报仪表板中创建的警报，但它始终显示数据不足。 我尝试为其提供更多信息，例如“InstanceType”和“ami”。同样的错误仍然存在。

Answer 1

好吧，事实证明， 我只需要提供完整的维度列表以供其识别。我只提供了其中的一些。 类似的东西：

resource "aws_cloudwatch_metric_alarm" "ec2_disk_space" {
  alarm_name          = "ec2_disk_space"
  comparison_operator = "GreaterThanOrEqualToThreshold"
  metric_name         = "disk_used_percent"
  namespace           = "CloudWatchCustomMetrics"
  period              = "600"
  evaluation_periods  = "1"
  statistic           = "Average"
  threshold           = "90"
  alarm_description   = "The disk space average precetage is over 90% for the last 10 minutes"
  actions_enabled     = "true"
  treat_missing_data  = "ignore"
  alarm_actions       = [aws_sns_topic.aws-notification-terraform.arn]
  ok_actions          = [aws_sns_topic.aws-notification-terraform.arn]
  dimensions = {
    InstanceId   = var.instance_ids
    ImageId      = "ami-"
    InstanceType = "r5.large"
    device       = "nvme"
    fstype       = "ext4"
    path         = "/"
  }
}