The open-source monitoring tool Beszel landed version 0.19.0 on 3 September 2026, delivering one of the largest feature updates in its history. Alongside new storage and process metrics, the release introduces far more granular alerts – and a change that affects many existing installations.
New metrics and alerts
The biggest gain is in data depth. Beszel can now monitor ZFS pools and datasets and shows cumulative read and write totals on the Disk I/O sheet. For notifications, the project leans on precision rather than plain thresholds.
- ZFS pool and dataset monitoring
- Container-health alerts with log excerpts in the notification
- Alerts for failed systemd services
- Warnings for CPU I/O-wait and steal time
- Cumulative disk read/write totals
Security: agents now verify certificates
One breaking change matters for self-hosters: agents now verify the hub’s HTTPS certificate. Anyone relying on a self-signed certificate, or one issued by a private CA, must supply the matching CA via the CA_CERT_FILE variable – otherwise the agent refuses the connection. Updates should therefore not be rolled out unchecked.
Context
Beszel consists of a central hub and lean agents, positioning itself as a resource-friendly alternative to heavyweight Prometheus-and-Grafana stacks. Version 0.19.0 moves it closer to classic server-monitoring solutions without adopting their complexity. The release also fixes numerous bugs, including hub crashes, Docker memory calculations and SMART warnings, and adds Greek and Uzbek translations.
Sources: GitHub – Beszel Releases · beszel.dev
