SNSToLambdaToSlack

目的

• 建立制式的 sns -> lambda -> slack 的回報機制
• 情境 : 可使用 alarm 來觸發 sns 來達到通知的目的

環境設定

• 設定憑證環境變數 :
  • export AWS_PROFILE=...
  • export AWS_REGION=...
• template.yaml 設定參數
  • NotifyLambdaName
  • SlackHookUrl, ex : "https://hooks.slack.com/services/..."
  • InfoChannel, ex : "#general"
  • IssueChannel, ex : "#general"

Deploy the sample application

sam build
sam deploy --guided

• 設定 stack name : SNSToLambdaToSlack
• 線上測試 : aws sns publish --topic-arn $Get_SNS_Arn --subject "ServiceIssue" --message "hello world"

Use the SAM CLI to build and test locally

sam build
sam local invoke SNSToLambdaToSlack --event events/event.json

Fetch, tail, and filter Lambda function logs

sam logs -n myLambdaToSlack --stack-name SNSToLambdaToSlack --tail

Cleanup

aws cloudformation delete-stack --stack-name SNSToLambdaToSlack

測試從 alarm 中觸發此服務

1. 建立 alarm, 觸發 sns topic

• 設定名稱為 myAlarmToSNSToLambdaToSlack

2. aws cloudwatch set-alarm-state --alarm-name myAlarmToSNSToLambdaToSlack --state-value ALARM --state-reason for_test

{
  "AlarmName": "myAlarmToSNSToLambdaToSlack",
  "AlarmDescription": "hello",
  "AWSAccountId": "424613967558",
  "NewStateValue": "ALARM",
  "NewStateReason": "for_test",
  "StateChangeTime": "2020-09-25T09:19:02.730+0000",
  "Region": "Asia Pacific (Singapore)",
  "AlarmArn": "arn:aws:cloudwatch:ap-southeast-1:424613967558:alarm:alarm",
  "OldStateValue": "INSUFFICIENT_DATA",
  "Trigger": {
    "MetricName": "test",
    "Namespace": "test",
    "StatisticType": "Statistic",
    "Statistic": "SUM",
    "Unit": null,
    "Dimensions": [],
    "Period": 300,
    "EvaluationPeriods": 1,
    "ComparisonOperator": "GreaterThanThreshold",
    "Threshold": 100000,
    "TreatMissingData": "- TreatMissingData:                    missing",
    "EvaluateLowSampleCountPercentile": ""
  }
}