ZFS

Date: 2026-02-08
Host: grafana
Component: Prometheus + Grafana + exporters +zfs
Scope: ZFS monitoring

ZFS / Zpool Metrics for Prometheus (node_exporter + textfile collector on FreeBSD)

This guide sets up zpool capacity metrics (zpool list) for Prometheus/Grafana using node_exporter’s textfile collector on FreeBSD.

This complements (not replaces) zfs_exporter, which provides ARC/internal ZFS metrics but not pool capacity.

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What I Got Working

Metrics exposed to Prometheus:

• zpool_size_bytes{pool="zroot"}
• zpool_alloc_bytes{pool="zroot"}
• zpool_free_bytes{pool="zroot"}
• zpool_capacity_ratio{pool="zroot"}

These map directly to:

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