systemd status notifier

In critical server environments, immediate notifications about failed systemd services were necessary. The challenge was to develop a flexible system that supports various communication channels and seamlessly integrates into existing monitoring and alerting systems without impacting the performance of monitored services.

The solution was a Bash-based notification system that can notify across multiple channels simultaneously: Email, Mattermost, PagerDuty, Pushover, Slack, and SMS (sipgate). The system monitors configurable systemd services and sends structured notifications with detailed service information. A modular architecture allows easy extension with additional notification channels.

Implementation was done as an efficient Bash script with systemd integration. The system can run as a systemd service or cron job and supports granular configuration for service selection and notification channels. Comprehensive error handling, rate limiting, and template-based messages ensure reliable operation. HTML email templates provide professional presentation.

A production-ready monitoring system deployed in critical infrastructures. The system significantly reduces MTTR (Mean Time To Repair) through immediate multi-channel notifications. The modular architecture enables easy adaptation to different environments and requirements. Support for all common notification services.