zfsutils-linux scrub cron job fails

[Tim Bishop]

The cron job for zfsutils-linux fails to run. The problem is that $PATH (on xenial, at least) is set to /bin:/usr/bin. The zpool binary is in /sbin and the /usr/lib/zfs-linux/scrub script (below) doesn't give the full path or modify $PATH. Further, the 2>&1 ensures that the useful error is sent to awk and not stderr where it'd be more easily noticed.

The fix is to just s,zpool,/sbin/zpool, in the script. And probably remove the stderr redirection, since I'm not sure if it's actually useful here.

This is the script as it currently is, for reference:

#!/bin/sh -eu

# Scrub all healthy pools.
zpool list -H -o health,name 2>&1 | \
        awk 'BEGIN {FS="\t"} {if ($1 ~ /^ONLINE/) print $2}' | \
while read pool
do
        zpool scrub "$pool"
done