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+======= monitor zfs from nagios/NRPE or cron on FreeBSD =======
+===== Synopsis ======
+I wrote this simple check-script for nrpe/nagios to get the status of various zpool volumes in a box, and output the failed volumes if any such exist.
+===== Syntax ======
+''$path/check_zpool.sh [email] [email]''
+If no arguments are specified, the script will assume its run for NRPE.
+If one or more email addresses are specified, the script will send an email in case an array reports an error.
+===== Output ======
+''tank: DEGRADED / data: rebuilding / system: ok''
+Failed/rebuilding volumes will always be first in the output string, to help diagnose the problem when recieving the output via pager/sms.
+==== Output Examples ====
+^ output ^ description ^
+| ok | The device is reported as ok by zpool |
+| DEGRADED | The RAID volume is degraded, it's still working but without the safety of RAID, and in some cases with severe performance loss. |
+| rebuilding | The RAID is rebuilding, will return to OK when done |
+| unknown state | Volume is in an unknown state. Please report this to me (soren at klintrup.dk) so I can update the script include the following output ''zpool status'', ''zpool list'' |
+===== Compability =====
+Should work on all versions of <nowiki>FreeBSD</nowiki> with zfs.
+Tested on <nowiki>FreeBSD 8.0-10.1</nowiki>
+===== Download =====
+==== Latest version ====
+Latest version 1.2
+{{files:zpool:check_zpool.sh}}
+==== Old version ====
+{{files:zpool:check_zpool-1.1.sh|1.1}}{{files:zpool:check_zpool-1.0.sh|1.0}}
+===== Changelog =====
+=== 1.2 ===
+       o minor output issue with FreeBSD 10+
+=== 1.1 ===
+       o Can now email an address of choice, just use email address(es) as arguments to shellscript
+       o check if zpool command exists on system before running script
+=== 1.0 ===
+       o Initial public release
+         Based on my check_smartarray.sh script.