將通知傳送至 Slack

本文說明如何將預算通知傳送至 Slack。

預算通常會設定為傳送電子郵件通知。不過，電子郵件不一定是掌握雲端費用最新資訊的最佳方式，尤其是預算至關重要且有時效性時。透過程式輔助通知，您可以將預算訊息轉寄至其他媒介，例如 Slack。

事前準備

開始之前，請務必完成下列工作：

  1. 啟用 Cloud Billing API
  2. 設定預算
  3. 設定程式輔助預算通知

設定 Slack 頻道和權限

第一步是建立 Slack 工作區和機器人使用者權杖，用於呼叫 Slack API。API 權杖可在 https://api.slack.com/apps 管理。如需詳細操作說明，請參閱 Slack 網站上的「機器人使用者」一文。

設定 Slack 通知。

設定 Cloud Run 函式

  1. 完成「建立 Cloud Run 函式」中的步驟。確認「Trigger type」(觸發條件類型) 設為預算使用的 Pub/Sub 主題。

  2. 新增下列相依項目：

    Node.js

    將下列內容複製到 package.json：

    {
  "name": "cloud-functions-billing",
  "private": "true",
  "version": "0.0.1",
  "description": "Examples of integrating Cloud Functions with billing",
  "main": "index.js",
  "engines": {
    "node": ">=20.0.0"
  },
  "scripts": {
    "compute-test": "c8 mocha -p -j 2 test/periodic.test.js --timeout=600000",
    "test": "c8 mocha -p -j 2 test/index.test.js --timeout=5000 --exit"
  },
  "author": "Ace Nassri <anassri@google.com>",
  "license": "Apache-2.0",
  "dependencies": {
    "@google-cloud/billing": "^5.0.0",
    "@google-cloud/compute": "^6.0.0",
    "@slack/web-api": "^8.0.0",
    "google-auth-library": "^9.0.0",
    "googleapis": "^143.0.0"
  },
  "devDependencies": {
    "@google-cloud/functions-framework": "^5.0.0",
    "c8": "^12.0.0",
    "gaxios": "^7.0.0",
    "mocha": "^10.0.0",
    "promise-retry": "^2.0.0",
    "proxyquire": "^2.1.0",
    "sinon": "^18.0.0",
    "wait-port": "^1.0.4"
  }
}

    Python

    將下列內容複製到 requirements.txt：

    slackclient==2.9.4
google-api-python-client==2.131.0

  3. 將下列程式碼複製到 Cloud Run 函式，使用 Slack API 將預算通知張貼到 Slack 聊天頻道：

    Node.js 

    const {WebClient} = require('@slack/web-api');

// TODO(developer) replace these with your own values
const BOT_ACCESS_TOKEN =
  process.env.BOT_ACCESS_TOKEN || 'xxxx-111111111111-abcdefghidklmnopq';
const CHANNEL = process.env.SLACK_CHANNEL || 'general';
const slackClient = new WebClient(BOT_ACCESS_TOKEN);

exports.notifySlack = async pubsubEvent => {
  const pubsubAttrs = pubsubEvent.attributes;
  const pubsubData = Buffer.from(pubsubEvent.data, 'base64').toString();
  const budgetNotificationText = `${JSON.stringify(
    pubsubAttrs
  )}, ${pubsubData}`;

  await slackClient.chat.postMessage({
    channel: CHANNEL,
    text: budgetNotificationText,
  });

  return 'Slack notification sent successfully';
};

    Python 

    import base64
import json
import os
import slack
from slack.errors import SlackApiError
# See https://api.slack.com/docs/token-types#bot for more info
BOT_ACCESS_TOKEN = "xxxx-111111111111-abcdefghidklmnopq"
CHANNEL = "C0XXXXXX"

slack_client = slack.WebClient(token=BOT_ACCESS_TOKEN)


def notify_slack(data, context):
    pubsub_message = data

    # For more information, see
    # https://cloud.google.com/billing/docs/how-to/budgets-programmatic-notifications#notification_format
    try:
        notification_attr = json.dumps(pubsub_message["attributes"])
    except KeyError:
        notification_attr = "No attributes passed in"

    try:
        notification_data = base64.b64decode(data["data"]).decode("utf-8")
    except KeyError:
        notification_data = "No data passed in"

    # This is just a quick dump of the budget data (or an empty string)
    # You can modify and format the message to meet your needs
    budget_notification_text = f"{notification_attr}, {notification_data}"

    try:
        slack_client.api_call(
            "chat.postMessage",
            json={"channel": CHANNEL, "text": budget_notification_text},
        )
    except SlackApiError:
        print("Error posting to Slack")

  4. 請確認下列 Slack API postMessage 參數設定正確：

    • 機器人使用者 OAuth 存取憑證
    • 頻道名稱

測試函式

為確保函式正常運作，請按照「測試 Cloud Run 函式」中的步驟操作。

如果成功，Slack 就會顯示訊息。

後續步驟

請參閱其他程式輔助通知範例，瞭解如何執行下列操作：