Serverless Plugin AWS Alertsとは何か？：Serverlessアプリケーションの監視を自動化するプラグイン

npm install serverless-plugin-aws-alerts

plugins:
  - serverless-plugin-aws-alerts

custom:
  alerts:
    stages: # Optionally - select which stages to deploy alarms to
      - production
      - staging

    dashboards: true

    nameTemplate: $[functionName]-$[metricName]-Alarm # Optionally - naming template for alarms, can be overwritten in definitions
    prefixTemplate: $[stackName] # Optionally - override the alarm name prefix

    topics:
      ok: ${self:service}-${opt:stage}-alerts-ok
      alarm: ${self:service}-${opt:stage}-alerts-alarm
      insufficientData: ${self:service}-${opt:stage}-alerts-insufficientData
    definitions:  # these defaults are merged with your definitions
      functionErrors:
        period: 300 # override period
      customAlarm:
        actionsEnabled: false # Indicates whether actions should be executed during any changes to the alarm state. The default is TRUE
        description: 'My custom alarm'
        namespace: 'AWS/Lambda'
        nameTemplate: $[functionName]-Duration-IMPORTANT-Alarm # Optionally - naming template for the alarms, overwrites globally defined one
        prefixTemplate: $[stackName] # Optionally - override the alarm name prefix, overwrites globally defined one
        metric: duration
        threshold: 200
        statistic: Average
        period: 300
        evaluationPeriods: 1
        datapointsToAlarm: 1
        comparisonOperator: GreaterThanOrEqualToThreshold
    alarms:
      - functionThrottles
      - functionErrors
      - functionInvocations
      - functionDuration