zfs: Log mib when sysctl read fails on FreeBSD

When the zfs collector fails on FreeBSD it doesn't log which `mib` triggered the issue. This makes diagnostics hard. Incompatibilities in the list of supported mibs is not uncommon with major os updates. By adding this change, it'll be easier for users to report the specific mib that is triggering the failure. Related to prometheus#2847 Signed-off-by: Daniel Kimsey <[email protected]>
dekimsey · Mar 23, 2024 · 3b5c7bf · 3b5c7bf
1 parent 641cf2c
commit 3b5c7bf
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/collector/zfs_freebsd.go b/collector/zfs_freebsd.go
@@ -273,7 +273,7 @@ func (c *zfsCollector) Update(ch chan<- prometheus.Metric) error {
 		v, err := m.Value()
 		if err != nil {
 			// debug logging
-			level.Debug(c.logger).Log("name", m.name, "couldn't get sysctl:", err)
+			level.Debug(c.logger).Log("name", m.name, "mib", m.mib, "couldn't get sysctl:", err)
 			continue
 		}