etc/periodic/daily/800.scrub-zfs

   1 #!/bin/sh
   2 #
   3 # $FreeBSD$
   4 #
   5
   6 # If there is a global system configuration file, suck it in.
   7 #
   8 if [ -r /etc/defaults/periodic.conf ]
   9 then
  10     . /etc/defaults/periodic.conf
  11     source_periodic_confs
  12 fi
  13
  14 : ${daily_scrub_zfs_default_threshold=30}
  15
  16 case "$daily_scrub_zfs_enable" in
  17     [Yy][Ee][Ss])
  18         echo
  19         echo 'Scrubbing of zfs pools:'
  20
  21         if [ -z "${daily_scrub_zfs_pools}" ]; then
  22                 daily_scrub_zfs_pools="$(zpool list -H -o name)"
  23         fi
  24
  25         for pool in ${daily_scrub_zfs_pools}; do
  26                 # sanity check
  27                 zpool list ${pool} >/dev/null 2>&1
  28                 if [ $? -ne 0 ]; then
  29                         echo "   WARNING: pool '${pool}' specified in"
  30                         echo "            '/etc/periodic.conf:daily_scrub_zfs_pools'"
  31                         echo "            does not exist"
  32                         continue
  33                 fi
  34
  35                 # successful only if there is at least one pool to scrub
  36                 rc=0
  37
  38                 # determine how many days shall be between scrubs
  39                 eval _pool_threshold=\${daily_scrub_zfs_${pool}_threshold}
  40                 if [ -z "${_pool_threshold}" ];then
  41                         _pool_threshold=${daily_scrub_zfs_default_threshold}
  42                 fi
  43
  44                 _last_scrub=$(zpool history ${pool} | \
  45                     egrep "^[0-9\.\:\-]{19} zpool scrub ${pool}\$" | tail -1 |\
  46                     cut -d ' ' -f 1)
  47                 if [ -z "${_last_scrub}" ]; then
  48                         # creation time of the pool if no scrub was done
  49                         _last_scrub=$(zpool history ${pool} | \
  50                             sed -ne '2s/ .*$//p')
  51                 fi
  52
  53                 # Now minus last scrub (both in seconds) converted to days.
  54                 _scrub_diff=$(expr -e \( $(date +%s) - \
  55                     $(date -j -f %F.%T ${_last_scrub} +%s) \) / 60 / 60 / 24)
  56                 if [ ${_scrub_diff} -lt ${_pool_threshold} ]; then
  57                         echo "   skipping scrubbing of pool '${pool}':"
  58                         echo "      last scrubbing is ${_scrub_diff} days ago, threshold is set to ${_pool_threshold} days"
  59                         continue
  60                 fi
  61
  62                 _status="$(zpool status ${pool} | grep scrub:)"
  63                 case "${_status}" in
  64                         *"scrub in progress"*)
  65                                 echo "   scrubbing of pool '${pool}' already in progress, skipping:"
  66                                 ;;
  67                         *"none requested"*)
  68                                 echo "   starting first scrub (since reboot) of pool '${pool}':"
  69                                 zpool scrub ${pool}
  70                                 ;;
  71                         *)
  72                                 echo "   starting scrub of pool '${pool}':"
  73                                 zpool scrub ${pool}
  74                                 ;;
  75                 esac
  76
  77                 echo "      consult 'zpool status ${pool}' for the result"
  78         done
  79         ;;
  80
  81     *)
  82         rc=0
  83         ;;
  84 esac
  85
  86 exit $rc