Daily spend to slack

A construct that deploys a CloudWatch cronjob that will trigger a Lambda that will fetch the yesterday usage of AWS and send it to a SNS as a spoofed ECR CloudWatch event that can be parsed by AWS Chatbot and send to Slack.

Yes, that was a mouthful. But the general idea is that to create a FinOps/Cost optimization culture in your team, your team also needs to know what they are spending. That is why I created this. This construct will deliver the yesterday usage to your slack channel of choice. This can also be a private channel.

Installation

Manual steps

Your AWS account must be connected with your Slack channel. This can't be done by IaC but involves manual steps.

1. Follow the steps of Step 1 in the category "Setting up AWS Chatbot with Slack"

CDK steps

'use strict';
import { App, Stack } from 'aws-cdk-lib';
import { Schedule } from 'aws-cdk-lib/aws-events';
import { DailySpendToSlack } from './index';

const app = new App();
const stack = new Stack(app, 'DailySpendToSlack');

new DailySpendToSlack(stack, 'DailySpendToSlack', {
  schedule: Schedule.cron({ minute: '0', hour: '9' }),
  slackWorkspaceId: '',
  slackChannelId: '',
  slackChannelName: '',
  accountName: 'stroobants.dev',
});

Parameters

• schedule: Schedule - The schedule it should run on, for example Schedule.cron({ minute: '0', hour: '9' }) means everyday at 09:00 UTC
• slackWorkspaceId: string - The ID that AWS generates for (see picture below)
• slackChannelId: string - The ID of the Slack Channel (Open slack, right-click on the channel you want the bot in, Copy link) -> https://cloudar.slack.com/archives/{slackChannelId})
• slackChannelName: string - The name of the Slack channel (this will be used to generate the Configuration name)
• accountName: string - You can give the bot a recognizable name, lowercase, max 30 and only .- allowed (could be more but that is what I tested)

License

Mozilla Public License 2.0