Serverless AWS Alarms Plugin

Serverless framework plugin that easily creates CloudWatch alarms for lambdas.

Usage

service: service-name

plugins:
  - serverless-aws-alarms

custom:
  awsAlarms:
    stages: # optional - select which stages to deploy alarms to
      - staging
      - production

    actions:
      default: # optional - default actions for all alarms
        ok: arn:aws:sns:${self:provider.region}:${aws:accountId}:my-team-alerts-ok
        alarm: arn:aws:sns:${self:provider.region}:${aws:accountId}:my-team-alerts-alarm
        insufficientData: arn:aws:sns:${self:provider.region}:${aws:accountId}:my-team-alerts-insufficient-data
      critical: # optional - create more actions
        ok: !Ref MyTeamCriticalAlertsTopic # you can also use !Ref and other CloudFormation functions
        alarm: !ImportValue 'my-team-alerts'

    defaults:
      nameTemplate: $[functionName]-$[metricName]-alarm # Optional - naming template for alarms, can be overwritten in definitions
      prefixTemplate: $[stackName] # Optional - override the alarm name prefix
      suffixTemplate: alarm # Optional - override the alarm name suffix
      tags:
        TEAM: my-team

    definitions: # these defaults are merged with your definitions
      lambdaErrors:
        enabled: true
        period: 300 # override period
      lambdaTimeout:
        enabled: true
        period: 300 # override period
        threshold: 2000 # override threshold
        okActions:
          - critical
        alarmActions:
          - critical
        insufficientDataActions: [] # override insufficientDataActions to empty array (instead of using default)
      customAlarm: # create new alarm
        enabled: false
        prefixTemplate: $[stackName] # Optional - override the alarm name prefix
        nameTemplate: $[functionName]-high-duration-alarm # Optional - override the alarm name
        description: 'My custom alarm'
        namespace: 'AWS/Lambda'
        metric: Duration
        threshold: 200
        statistic: Average
        period: 300
        evaluationPeriods: 1
        datapointsToAlarm: 1
        comparisonOperator: GreaterThanOrEqualToThreshold

provider:
  name: aws
  runtime: nodejs18x

functions:
  foo:
    name: ${self:service}-foo
    handler: foo.handler
    alarms: # merged with definitions
      customAlarm:
        enabled: true
      someAlarm: # creates new alarm for this lambda or overwrite some properties of the alarm (with the same name) from definitions
        namespace: 'AWS/Lambda'
        metric: Errors
        threshold: 1
        statistic: Minimum
        period: 60
        evaluationPeriods: 1
        datapointsToAlarm: 1
        comparisonOperator: GreaterThanOrEqualToThreshold
        actionsEnabled: false

Alarm defenition

Detailed description of the properties can be found in the AWS documentation.

name	description	type	default
enabled	Indicates whether the alarm will be created or not	boolean	false
prefixTemplate	Prefix alarm name	string	''
nameTemplate	The name of the alarm	string	$[lambdaName]-$[definitionName]
description	The description of the alarm	string
namespace	The namespace of the metric associated with the alarm	string
metric	The name of the metric associated with the alarm	string
comparisonOperator	The arithmetic operation to use when comparing the specified statistic and threshold	string
statistic	The statistic for the metric associated with the alarm	string
threshold	The value to compare with the specified statistic	number
period	The period, in seconds, over which the statistic is applied	number
evaluationPeriods	The number of periods over which data is compared to the specified threshold	number
datapointsToAlarm	The number of datapoints that must be breaching to trigger the alarm	number
actionsEnabled	Indicates whether actions should be executed during any changes to the alarm state	boolean
okActions	The actions to execute when this alarm transitions to the OK state from any other state	string[]
alarmActions	The list of actions to execute when this alarm transitions into an ALARM state from any other state	string[]
insufficientDataActions	The actions to execute when this alarm transitions to the INSUFFICIENT_DATA state from any other state	string[]
treatMissingData	Sets how this alarm is to handle missing data points	string
tags	Sets alarm tags	Record<string, string>
metricFilter	Create an alarm based on a pattern found in a log group	AlarmMetricFilterDefinition

Metric filter definition

Detailed description of the properties can be found in the AWS documentation.

name	description	type	default
pattern	A filter pattern for extracting metric data out of ingested log events. For more information, see Filter and Pattern Syntax	string required
metricValue	The value that is published to the CloudWatch metric	string | number
defaultValue	The value to emit when a filter pattern does not match a log event	number
nameTemplate	The name of the metric filter	string	$[lambdaName]$[definitionName]AlarmFilter

Name template placeholders

You can use the following placeholders in the nameTemplate and prefixTemplate properties:

• stackName - the name of the stack
• lambdaName - the name of the lambda
• lambdaId - the name of the lambda resource (the key in functions section)
• lambdaLogicalId - the name of the lambda resource in the CloudFormation template
• metricName - the name of the metric (from alarm defenition)
• definitionName - the name of the alarm definition

Usage example:

nameTemplate: $[stackName]-$[lambdaName]-$[metricName]-alarm
prefixTemplate: $[stackName]