我该如何做尺寸块“动态”？

Posted 2023-03-24

【中文标题】我该如何做尺寸块“动态”？

【英文标题】：How can I do dimensions block "dynamic"?

【发布时间】：2021-02-15 06:57:07

【问题描述】：

想知道如何使 dimensions 阻止 aws_cloudwatch_metric_alarm 资源“动态”。 到目前为止，有一些我确定不会工作的代码......但我想问一下应该如何编写它来实现目标。

locals 
  backend_tg_name  = data.terraform_remote_state.network.outputs.backend_tg_name
  frontend_tg_name = data.terraform_remote_state.network.outputs.frontend_tg_name
  webadmin_tg_name = data.terraform_remote_state.network.outputs.webadmin_tg_name

  dimensions = [
    
      LoadBalancer = data.terraform_remote_state.network.outputs.alb_suffix
      TargetGroup  = data.terraform_remote_state.network.outputs.backend_tg_suffix
    ,
    
      LoadBalancer = data.terraform_remote_state.network.outputs.alb_suffix
      TargetGroup  = data.terraform_remote_state.network.outputs.frontend_tg_name
    ,
    
      LoadBalancer = data.terraform_remote_state.network.outputs.alb_suffix
      TargetGroup  = data.terraform_remote_state.network.outputs.webadmin_tg_suffix
    
  ]



resource "aws_cloudwatch_metric_alarm" "httpcode_target_5xx_count" 
  for_each = 
    backend_tg_name  = local.backend_tg_name
    frontend_tg_name = local.frontend_tg_name
    webadmin_tg_name = local.webadmin_tg_name
  

  alarm_name          = format("ALB: High amount of 5XX errors on target group %s", each.value)
  comparison_operator = "GreaterThanThreshold"
  evaluation_periods  = var.tg_evaluation_periods
  metric_name         = "HTTP_Code_Target_5XX_Count"
  namespace           = "AWS/ApplicationELB"
  period              = var.tg_period
  statistic           = "Sum"
  threshold           = var.tg_5xx_threshhold
  alarm_description   = "Average API 5XX target group error code count is too high"
  alarm_actions       = aws_sns_topic.infra_monitoring.arn
  ok_actions          = aws_sns_topic.infra_monitoring.arn
  treat_missing_data  = "notBreaching"

  dimensions = 
    "LoadBalancer" = ???
    "TargetGroup"  = ???
  

如何更改尺寸和/或本地块？我想迭代三次并为同一个 ALB 后面的三个不同目标组创建三个相同的警报。 请帮忙。

【参考方案1】：

这似乎是有效的，希望它会有所帮助：

locals 
  alb_suffix = data.terraform_remote_state.network.outputs.alb_suffix
  tg_alarms = 
    "backend_tg" = 
      tg_name   = data.terraform_remote_state.network.outputs.backend_tg_name
      tg_suffix = data.terraform_remote_state.network.outputs.backend_tg_suffix
    ,
    "frontend_tg" = 
      tg_name   = data.terraform_remote_state.network.outputs.frontend_tg_name
      tg_suffix = data.terraform_remote_state.network.outputs.frontend_tg_name
    ,
    "webadmin_tg" = 
      tg_name   = data.terraform_remote_state.network.outputs.webadmin_tg_name
      tg_suffix = data.terraform_remote_state.network.outputs.webadmin_tg_suffix
    
  


resource "aws_cloudwatch_metric_alarm" "httpcode_target_5xx_count" 
  for_each = local.tg_alarms

  alarm_name          = format("ALB: High amount of 5XX errors on target group %s", each.value["tg_name"])
  comparison_operator = "GreaterThanThreshold"
  evaluation_periods  = var.tg_evaluation_periods
  datapoints_to_alarm = var.tg_datapoints_to_alarm
  metric_name         = "HTTPCode_Target_5XX_Count"
  namespace           = "AWS/ApplicationELB"
  period              = var.tg_period
  statistic           = "Sum"
  threshold           = var.tg_5xx_threshold
  alarm_description   = "Average API 5XX target group error code count is too high"
  alarm_actions       = [aws_sns_topic.infra_monitoring.arn]
  ok_actions          = [aws_sns_topic.infra_monitoring.arn]
  treat_missing_data  = "notBreaching"

  dimensions = 
    "LoadBalancer" = local.alb_suffix
    "TargetGroup"  = each.value["tg_suffix"]