Slack and Microsoft Teams notifications

@rpallas/outcrop-chatops turns the platform alert topics into chat messages. The account baseline creates one SNS topic per severity (critical, high, medium, low) and every PlatformAlarm publishes to the topic of its severity. ChatOpsNotifier subscribes a Lambda function to those topics and posts formatted messages to Slack and Teams incoming webhooks.

Setup

1. Create an incoming webhook in Slack and/or Teams.

2. Add slack-webhook / teams-webhook to the account baseline's sharedSecrets module and replace the generated values with the webhook URLs:

   aws secretsmanager put-secret-value \
     --secret-id platform-dev-slack-webhook \
     --secret-string 'https://hooks.example.com/services/T000/B000/XXXX'

3. Add the notifier once per environment, either in a service stack (defaults to the environment topics and shared secrets) or in the account baseline stack with explicit topics and webhookSecrets:

import { ChatOpsNotifier } from "@rpallas/outcrop-chatops";

new ChatOpsNotifier(this, "ChatOps", {
  destinations: [
    { kind: "slack", channelLabel: "#platform-alerts" },
    { kind: "teams", minimumSeverity: "high" },
  ],
});

Routing

Severity is the routing key. Each destination has a minimumSeverity, so a Teams channel can receive only high and critical while Slack receives everything. Messages carry the environment (from the topic name), the service and alarm name (from the platform alarm description), the state reason and a console deep link.

Failed deliveries are retried once and then land in the function's dead letter queue.

See the package README for props, message formats, baseline usage and limitations.