Alerting Service

A microservice for the Nemesis platform that handles alert notifications through various channels using the Apprise library.

Purpose

This service processes alert events from the Nemesis platform and delivers notifications to configured external services like Slack, Discord, email, webhooks, and other notification platforms supported by Apprise.

Features

Multi-channel notification support via Apprise
Rate limiting with configurable concurrent alert processing
Automatic retry logic with exponential backoff
Real-time feedback subscription from Hasura GraphQL
Support for tagged notifications to specific channels
Health monitoring and test endpoints

Configuration

The service is configured using environment variables:

APPRISE_URLS: Comma-separated list of Apprise notification URLs with optional tags
MAX_CONCURRENT_ALERTS: Maximum number of concurrent alert processing (default: 10)
MAX_ALERT_RETRIES: Number of retry attempts for failed alerts (default: 5)
RETRY_DELAY_SECONDS: Delay between retry attempts (default: 30)
NEMESIS_URL: Base URL of the Nemesis installation (default: http://localhost/)

Alert Sources

The service handles alerts from two sources:

Direct alerts: Published to the alert topic via Dapr pub/sub
Feedback alerts: Automatically generated from user feedback in the files_feedback table

Endpoints

GET /healthz: Health check endpoint for Docker healthcheck
POST /test/alert: Test endpoint for sending sample alerts

Notification Channels

Supports all Apprise-compatible services including:

Slack
Discord
Microsoft Teams
Email (SMTP)
Webhooks
And many more...

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