Editing Terraform resource: aws cloudwatch metric alarm

* https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm
 aws_cloudwatch_metric_alarm

== Examples ==

[[LB]]
 resource "aws_cloudwatch_metric_alarm" "lb_targets_not_available" {
  [[alarm_name]]          = format("%s-%s", lower("${var.rds_name}"), "db-highCPUUtilization")
  [[comparison_operator]] = "LessThanOrEqualToThreshold"
  evaluation_periods  = "2"
  [[metric_name]]         = "[[CPUUtilization]]"
  namespace           = "[[AWS/NetworkELB]]"
  period              = "30"
  [[statistic]]           = "[[SampleCount]]"
  threshold           = "0"
  alarm_description   = "No healthy target group available to LB listener"
 
  dimensions = {
    HealthyHostCount = [[aws_lb]].your-load-balancer-name.id
  }
 }


[[CPU]]
 resource "aws_cloudwatch_metric_alarm" "db_cpu_utilization_too_high" {
  [[alarm_name]]          = format("%s-%s", lower("${var.rds_name}"), "db-highCPUUtilization")
  [[comparison_operator]] = "GreaterThanThreshold"
  evaluation_periods  = "5"
  [[metric_name]]         = "[[CPUUtilization]]"
  namespace           = "[[AWS/RDS]]"
  period              = "120"
  statistic           = "Average"
  threshold           = "80"
  alarm_description   = "Average database CPU utilization is too high."
 
  dimensions = {
    DBInstanceIdentifier = aws_db_instance.rds_instance.id
  }
 }

<pre> 
resource "aws_cloudwatch_metric_alarm" "db_disk_queue_depth_too_high" {
  alarm_name          = format("%s-%s", lower("${var.rds_name}"), "db-highDiskQueueDepth")
  comparison_operator = "GreaterThanThreshold"
  evaluation_periods  = "2"
  metric_name         = "DiskQueueDepth"
  namespace           = "AWS/RDS"
  period              = "120"
  statistic           = "Average"
  threshold           = "10"
  alarm_description   = "Average database disk queue depth is too high, performance may be negatively impacted."

  dimensions = {
    DBInstanceIdentifier = aws_db_instance.rds_instance.id
  }
}

resource "aws_cloudwatch_metric_alarm" "db_disk_free_storage_space_too_low" {
  alarm_name          = format("%s-%s", lower("${var.rds_name}"), "db-lowFreeStorageSpace")
  comparison_operator = "[[LessThanThreshold]]"
  evaluation_periods  = "2"
  metric_name         = "FreeStorageSpace"
  namespace           = "AWS/RDS"
  period              = "120"
  statistic           = "Average"
  threshold           = "10"
  alarm_description   = "Average database free storage space is too low and may fill up soon."

  dimensions = {
    DBInstanceIdentifier = aws_db_instance.rds_instance.id
  }
}

resource "aws_cloudwatch_metric_alarm" "db_memory_freeable_too_low" {
  alarm_name          = format("%s-%s", lower("${var.rds_name}"), "db-lowFreeableMemory")
  comparison_operator = "LessThanThreshold"
  evaluation_periods  = "2"
  metric_name         = "FreeableMemory"
  namespace           = "AWS/RDS"
  period              = "120"
  statistic           = "Average"
  threshold           = "10"
  alarm_description   = "Average database freeable memory is too low, performance may be negatively impacted."

  dimensions = {
    DBInstanceIdentifier = aws_db_instance.rds_instance.id
  }
}
</pre>

== ChatGPT examples for [[ALB]] (01/2023) ==
 resource "aws_cloudwatch_metric_alarm" "elb_5xx_error_rate" {
  alarm_name                = "elb_5xx_error_rate"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "5"
  [[metric_name]]               = "[[HTTPCode_Backend_5XX]]"
  [[namespace]]                 = "[[AWS/ApplicationELB]]"
  period                    = "60"
  statistic                 = "SampleCount"
  threshold                 = "1"
  alarm_description         = "This alarm will notify when the 5XX error rate is greater than 1% for 5 consecutive minutes"
  [[alarm_actions]]             = [aws_sns_topic.example.arn]
  dimensions = {
    LoadBalancer = aws_elbv2_load_balancer.example.name
  }
 }

 resource "aws_cloudwatch_metric_alarm" "elb_response_time" {
  alarm_name                = "elb_response_time"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "5"
  metric_name               = "[[TargetResponseTime]]"
  namespace                 = "AWS/ApplicationELB"
  period                    = "60"
  statistic                 = "[[Average]]"
  threshold                 = "2"
  alarm_description         = "This alarm will notify when the average response time is greater than 2 seconds for 5 consecutive data points"
  alarm_actions             = [aws_sns_topic.example.arn]
  dimensions = {
    LoadBalancer = aws_elbv2_load_balancer.example.name
  }
 }

 resource "aws_cloudwatch_metric_alarm" "elb_response_time" {
  alarm_name                = "elb_response_time"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "5"
  metric_name               = "[[TargetResponseTime]]"
  namespace                 = "AWS/ApplicationELB"
  period                    = "60"
  statistic                 = "[[Maximum]]"
  threshold                 = "1"
  alarm_description         = "This alarm will notify when the maximum response time is greater than 1 second for 5 consecutive data points"
  alarm_actions             = [aws_sns_topic.example.arn]
  dimensions = {
    LoadBalancer = aws_elbv2_load_balancer.example.name
  }
 }

 resource "aws_cloudwatch_metric_alarm" "elb_response_time_90th_percentile" {
  alarm_name                = "elb_response_time_90th_percentile"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "5"
  metric_name               = "TargetResponseTime"
  namespace                 = "AWS/ApplicationELB"
  period                    = "60"
  statistic                 = "p90"
  threshold                 = "1"
  alarm_description         = "This alarm will notify when the 90th percentile of the response time is greater than 1 second for 5 consecutive data points"
  [[alarm_actions]]             = [aws_sns_topic.example.arn]
  dimensions = {
    LoadBalancer = aws_elbv2_load_balancer.example.name
  }
 }

 resource "[[aws_sns_topic]]" "example" {
  name = "example-topic"
 }

== Related ==
* <code>[[aws cloudwatch metric alarm]]</code>
* <code>[[alarm_actions]]</code>
* <code>[[aws_sns_topic]]</code>

== See also ==
* {{tf cloudwatch}}
* {{tf aws}}

[[Category:Terraform]]
@@ Line 1: / Line 1: @@
 * https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_metric_alarm
   aws_cloudwatch_metric_alarm
-== Official example ==
- resource "aws_cloudwatch_metric_alarm" "nlb_healthyhosts" {
-  alarm_name          = "alarmname"
-  comparison_operator = "[[LessThanThreshold]]"
-  evaluation_periods  = "1"
-  metric_name         = "HealthyHostCount"
-  namespace           = "AWS/NetworkELB"
-  period              = "60"
-  statistic           = "Average"
-  threshold           = var.logstash_servers_count
-  alarm_description   = "Number of healthy nodes in Target Group"
-  actions_enabled     = "true"
-  alarm_actions       = [aws_sns_topic.sns.arn]
-  ok_actions          = [aws_sns_topic.sns.arn]
-  dimensions = {
-    TargetGroup  = aws_lb_target_group.lb-tg.arn_suffix
-    LoadBalancer = aws_lb.lb.arn_suffix
-  }
- }
 == Examples ==
@@ Line 30: / Line 10: @@
    evaluation_periods  = "2"
    [[metric_name]]         = "[[CPUUtilization]]"
-   [[namespace]]           = "[[AWS/NetworkELB]]"
+   namespace           = "[[AWS/NetworkELB]]"
    period              = "30"
    [[statistic]]           = "[[SampleCount]]"
@@ Line 41: / Line 21: @@
   }
-== [[AWS/RDS]] ==
 [[CPU]]
   resource "aws_cloudwatch_metric_alarm" "db_cpu_utilization_too_high" {
@@ Line 59: / Line 39: @@
   }
-[[DiskQueueDepth]]
+<pre>
+resource "aws_cloudwatch_metric_alarm" "db_disk_queue_depth_too_high" {
- resource "aws_cloudwatch_metric_alarm" "db_disk_queue_depth_too_high" {
    alarm_name          = format("%s-%s", lower("${var.rds_name}"), "db-highDiskQueueDepth")
    comparison_operator = "GreaterThanThreshold"
@@ Line 71: / Line 50: @@
    threshold           = "10"
    alarm_description   = "Average database disk queue depth is too high, performance may be negatively impacted."
    dimensions = {
      DBInstanceIdentifier = aws_db_instance.rds_instance.id
    }
- }
+}
-[[FreeStorageSpace]]
+resource "aws_cloudwatch_metric_alarm" "db_disk_free_storage_space_too_low" {
- resource "aws_cloudwatch_metric_alarm" "db_disk_free_storage_space_too_low" {
    alarm_name          = format("%s-%s", lower("${var.rds_name}"), "db-lowFreeStorageSpace")
    comparison_operator = "[[LessThanThreshold]]"
@@ Line 93: / Line 70: @@
      DBInstanceIdentifier = aws_db_instance.rds_instance.id
    }
- }
+}
-[[FreeableMemory]]
+resource "aws_cloudwatch_metric_alarm" "db_memory_freeable_too_low" {
- resource "aws_cloudwatch_metric_alarm" "db_memory_freeable_too_low" {
    alarm_name          = format("%s-%s", lower("${var.rds_name}"), "db-lowFreeableMemory")
    comparison_operator = "LessThanThreshold"
@@ Line 110: / Line 86: @@
      DBInstanceIdentifier = aws_db_instance.rds_instance.id
    }
- }
+}
+</pre>
 == ChatGPT examples for [[ALB]] (01/2023) ==