Date: Wed, 13 Apr 2022 17:25:23 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 263262] prometheus_sysctl_exporter doesn't distinguish between metric types Message-ID: <bug-263262-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263262 Bug ID: 263262 Summary: prometheus_sysctl_exporter doesn't distinguish between metric types Product: Base System Version: 13.1-STABLE Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: asomers@FreeBSD.org Prometheus recognizes four fundamental metric types: Counter, Gauge, Histogram, and Summary. There are sysctls that correspond to at least three of those: kstat.zfs.<POOL>.misc.dmu_tx_assign: histogram kstat.zfs.dmu_tx.dmu_tx_dirty_over_max: counter vfs.zfs.arc.max: gauge By default Prometheus assumes that all metrics are of type Gauge unless the exporter says otherwise. So sysctls that are really counters (like dmu_tx_dirty_over_max) can't properly be queried in Grafana. Presumably the histogram type can't either, but I haven't tried with any of those. The exporter ought to publish the metric type, like this: # HELP sysctl_foo_bar description of foo.bar # TYPE sysctl_foo_bar counter sysctl_foo_bar 12345 I'm not sure how to fix this. It might require adding additional information to sysctl(3) itself. -- You are receiving this mail because: You are the assignee for the bug.home | help
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