Feat: expose per-dataset metrics in the ZFS collector on FreeBSD #2693
Description
Host operating system: output of uname -a
FreeBSD, all versions
node_exporter version: output of node_exporter --version
1.5.0
Feature
PR #1632 exposed ZFS's per-dataset performance metrics, but only on Linux. The same metrics are available on FreeBSD. However, whereas on Linux they are presented as files in /proc , on FreeBSD they are presented as sysctls. The ZFS collector already publishes non-dataset-specific metrics on FreeBSD, so I would think that it shouldn't be too hard to add the dataset-specific ones too. See https://github.com/asomers/ztop/blob/master/src/app.rs for an example (in Rust) of a project that parses both Linux's and FreeBSD's ZFS per-dataset metrics.