README.md

AWS Cloudwatch Terraform module

Terraform module which creates Cloudwatch resources on AWS

This type of resources are supported:

• Log metric filter
• Metric alarm

Terraform versions

Only Terraform 0.12 is supported.

Usage

Log metric filter

module "log_metric_filter" {
  source  = "terraform-aws-modules/cloudwatch/aws//modules/log-metric-filter"
  version = "~> 1.0"

  log_group_name = "my-application-logs"

  name    = "error-metric"
  pattern = "ERROR"

  metric_transformation_namespace = "MyApplication"
  metric_transformation_name      = "ErrorCount"
}

Read Filter and Pattern Syntax for explanation of pattern.

Metric alarm

module "metric_alarm" {
  source  = "terraform-aws-modules/cloudwatch/aws//modules/metric-alarm"
  version = "~> 1.0"

  alarm_name          = "my-application-logs-errors"
  alarm_description   = "Bad errors in my-application-logs"
  comparison_operator = "GreaterThanOrEqualToThreshold"
  evaluation_periods  = 1
  threshold           = 10
  period              = 60
  unit                = "Count"

  namespace   = "MyApplication"
  metric_name = "ErrorCount"
  statistic   = "Maximum"

  alarm_actions = ["arn:aws:sns:eu-west-1:835367859852:my-sns-queue"]
}

Metric alarms by multiple dimensions

This submodule is useful when you need to create very similar alarms where only dimensions are different (eg, multiple AWS Lambda functions), but the rest of arguments are the same.

module "metric_alarms" {
  source  = "terraform-aws-modules/cloudwatch/aws//modules/metric-alarms-by-multiple-dimensions"
  version = "~> 1.0"

  alarm_name          = "lambda-duration-"
  alarm_description   = "Lambda duration is too high"
  comparison_operator = "GreaterThanOrEqualToThreshold"
  evaluation_periods  = 1
  threshold           = 10
  period              = 60
  unit                = "Milliseconds"

  namespace   = "AWS/Lambda"
  metric_name = "Duration"
  statistic   = "Maximum"

  dimensions = {
    "lambda1" = {
      FunctionName = "index"
    },
    "lambda2" = {
      FunctionName = "signup"
    },
  }

  alarm_actions = ["arn:aws:sns:eu-west-1:835367859852:my-sns-queue"]
}

Check out list of all AWS services that publish CloudWatch metrics for detailed information about each supported service.

Examples

• Complete Cloudwatch log metric filter and alarm
• Cloudwatch metric alarms for AWS Lambda
• Cloudwatch metric alarms for AWS Lambda with multiple dimensions

Authors

Module managed by Anton Babenko.

The development of this module was sponsored by indebted.co.

License

Apache 2 Licensed. See LICENSE for full details.