resource "aws_cloudwatch_metric_alarm" "rds-cpu" {
  alarm_name                = "${var.cw-alarm-prefix}:RDS:CpuUtilization:${var.rds-instance-name}"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "1"
  metric_name               = "CPUUtilization"
  period                    = "3600"
  statistic                 = "Average"
  threshold                 = var.threshold-CpuUtilization
  alarm_description         = "RDS:CpuUtilization"
  namespace                 = "AWS/RDS"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.alarm-actions-urgent]
  ok_actions                = [var.alarm-actions-urgent]
  dimensions = {
    DBInstanceIdentifier = var.rds-instance-name
  }
  tags = var.default-tags
  lifecycle {
    ignore_changes = [tags]
  }
}

resource "aws_cloudwatch_metric_alarm" "rds-storage" {
  alarm_name                = "${var.cw-alarm-prefix}:RDS:FreeStorageSpace:${var.rds-instance-name}"
  comparison_operator       = "LessThanThreshold"
  evaluation_periods        = "1"
  metric_name               = "FreeStorageSpace"
  period                    = "3600"
  statistic                 = "Average"
  threshold                 = var.threshold-FreeStorageSpace
  alarm_description         = "RDS:FreeStorageSpace"
  namespace                 = "AWS/RDS"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.alarm-actions-urgent]
  ok_actions                = [var.alarm-actions-urgent]
  dimensions = {
    DBInstanceIdentifier = var.rds-instance-name
  }
  tags = var.default-tags
  lifecycle {
    ignore_changes = [tags]
  }
}

resource "aws_cloudwatch_metric_alarm" "rds-memory" {
  alarm_name                = "${var.cw-alarm-prefix}:RDS:FreeableMemory:${var.rds-instance-name}"
  comparison_operator       = "LessThanThreshold"
  evaluation_periods        = "1"
  metric_name               = "FreeableMemory"
  period                    = "3600"
  statistic                 = "Average"
  threshold                 = var.threshold-FreeableMemory
  alarm_description         = "RDS:FreeableMemory"
  namespace                 = "AWS/RDS"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.alarm-actions-urgent]
  ok_actions                = [var.alarm-actions-urgent]
  dimensions = {
    DBInstanceIdentifier = var.rds-instance-name
  }
  tags = var.default-tags
  lifecycle {
    ignore_changes = [tags]
  }
}

resource "aws_cloudwatch_metric_alarm" "rds-DiskQueueDepth" {
  alarm_name                = "${var.cw-alarm-prefix}:RDS:DiskQueueDepth:${var.rds-instance-name}"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "2"
  metric_name               = "DiskQueueDepth"
  period                    = "300"
  statistic                 = "Average"
  threshold                 = var.threshold-DiskQueueDepth
  alarm_description         = "RDS:DiskQueueDepth"
  namespace                 = "AWS/RDS"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.alarm-actions-urgent]
  ok_actions                = [var.alarm-actions-urgent]
  dimensions = {
    DBInstanceIdentifier = var.rds-instance-name
  }
  tags = var.default-tags
  lifecycle {
    ignore_changes = [tags]
  }
}

resource "aws_cloudwatch_metric_alarm" "rds-ReadLatency" {
  alarm_name                = "${var.cw-alarm-prefix}:RDS:ReadLatency:${var.rds-instance-name}"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "2"
  metric_name               = "ReadLatency"
  period                    = "900"
  statistic                 = "Average"
  threshold                 = var.threshold-ReadLatency
  alarm_description         = "RDS:ReadLatency"
  namespace                 = "AWS/RDS"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.alarm-actions-urgent]
  ok_actions                = [var.alarm-actions-urgent]
  dimensions = {
    DBInstanceIdentifier = var.rds-instance-name
  }
  tags = var.default-tags
  lifecycle {
    ignore_changes = [tags]
  }
}

resource "aws_cloudwatch_metric_alarm" "rds-WriteLatency" {
  alarm_name                = "${var.cw-alarm-prefix}:RDS:WriteLatency:${var.rds-instance-name}"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "2"
  metric_name               = "WriteLatency"
  period                    = "900"
  statistic                 = "Average"
  threshold                 = var.threshold-WriteLatency
  alarm_description         = "RDS:WriteLatency"
  namespace                 = "AWS/RDS"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.alarm-actions-urgent]
  ok_actions                = [var.alarm-actions-urgent]
  dimensions = {
    DBInstanceIdentifier = var.rds-instance-name
  }
  tags = var.default-tags
  lifecycle {
    ignore_changes = [tags]
  }
}