serverless.yml

service: ${env:SERVICE_NAME}

resources:
  Description: Lambda to remove CloudWatch Alarms when an EC2 instance is terminated
  Outputs:
    RemoveCloudWatchAlarmsArn:
      Description: RemoveCloudWatchAlarms ARN
      Value:
        'Fn::GetAtt': [ RemoveCloudWatchAlarmsLambdaFunction, Arn ]
      Export:
        Name: '${self:service}:${self:provider.stage}:RemoveCloudWatchAlarmsArn'

provider:
  name: aws
  stage: production
  runtime: nodejs14.x
  region: us-west-2
  timeout: 30
  memorySize: 1024
  tracing: true
  iamRoleStatements:
    - Effect: "Allow"
      Action:
        - "cloudwatch:DescribeAlarms"
        - "cloudwatch:DeleteAlarms"
        - "cloudwatch:SetAlarmState"
      Resource:
        - "*"
    - Effect: "Allow" # xray permissions (required)
      Action:
        - "xray:PutTraceSegments"
        - "xray:PutTelemetryRecords"
      Resource:
        - "*"

plugins:
  - serverless-plugin-tracing

package:
  artifact: ${env:ARTIFACT_PATH}

functions:
  RemoveCloudWatchAlarms:
    handler: ${env:BUNDLE_NAME}.removeCloudWatchAlarms
    events:
      - cloudwatchEvent:
          event:
            source:
              - "aws.autoscaling"
            detail-type:
              - "EC2 Instance Terminate Successful"