Centre Blaise Pascal » gZFS

#!/bin/bash

# $Id$

# Copyright (C) 2013 Kevin Reverchon, Loïs Taulelle

# This file/program is part of gZFS free software

# See COPYING file for details

#

DIR_CRON="/etc/cron.d/"

DIR_CONF_SNAPSHOT="/opt/gZFS/snapshots/"

BIN_ZFS_SNAPSHOT="/sbin/zfs-snapshot"

BINZFS="/sbin/zfs"

BINZPOOL="/sbin/zpool"

function usage {

  echo "Usage : $0 options" 1>&2

  echo "OPTIONS :" 1>&2

  echo "  -i : interactive mode, this option is not compatible with other options" 1>&2

  echo "  -m : minute field for cron snapshot" 1>&2

  echo "  -H : hour field for cron snapshot" 1>&2

  echo "  -D : Day of Month field for cron snapshot" 1>&2

  echo "  -M : Month field for cron snapshot" 1>&2

  echo "  -d : Day of week for cron snapshot" 1>&2

  echo "  -N : Name of ZFS Volume/FileSystem to snapshot" 1>&2

  echo "  -t : Type (Possible values: volume or filesystem)" 1>&2

  echo "  -k : Number of snapshot to keep" 1>&2

}

function checkField4Cron {

  if [[ $OPTARG =~ [a-zA-Z] ]]

  then

     echo "-$OPTION contain a bad value" 1>&2

     exit 1

  fi

}

function createCronFile4Snapshot {

FILE_NAME=$(echo "snapshot-"${NAMEZFS//\//-})

echo "$MINUTE $HOUR $MONTH $DAYMONTH $DAYWEEK root $BIN_ZFS_SNAPSHOT $DIR_CONF_SNAPSHOT$FILE_NAME.conf" > $DIR_CRON$FILE_NAME

echo "name=$NAMEZFS" >$DIR_CONF_SNAPSHOT$FILE_NAME.conf

echo "type=$TYPEZFS" >>$DIR_CONF_SNAPSHOT$FILE_NAME.conf

echo "nbsnapshots=$SNAP2KEEP" >>$DIR_CONF_SNAPSHOT$FILE_NAME.conf

}

function interactive {

$BINZFS list

echo "*** Select the ZFS volume/filesystem : ***"

while read inputline

do

   NAME_VOL=$inputline

   if [ "$NAME_VOL" = "" ]

   then

      echo "*** Select the ZFS volume/filesystem : ***"

   else

      echo "*** Are you sur : $inputline ? (y/n) ***"

      while read inputConfirm

      do

         if [ "$inputConfirm" = "y" ]||[ "$inputConfirm" = "n" ]

         then

            break

         fi

         echo "*** Are you sur : $inputline ? (y/n) ***"

      done

      if [ "$inputConfirm" = "y" ]

      then

         $BINZFS list $NAME_VOL

         if [ $? -eq 0 ]

         then

            echo "*** The ZFS volume/filesystem $NAME_VOL exists ***"

            break

         else

            echo "*** The ZFS volume/filesystem $NAME_VOL does not exist ***"

            echo "*** Select the ZFS volume/filesystem : ***"

         fi

      fi

      if [ "$inputConfirm" != "y" ]

      then

         echo "*** Select the ZFS volume/filesystem : ***"

      fi

   fi

done

echo "*** ZFS Type : volume or filesystem ? ***"

while read inputline

do

  if [ "$inputline" = "volume" ] || [ "$inputline" = "filesystem" ]

  then

     TYPE_ZFS=$inputline

     break

  else

    echo "*** ZFS Type : volume or filesystem ? ***"

  fi

done

echo "*** How many snapshot to keep ? ***"

while read inputline

do

   NB_SNAP=$inputline

   if [ "$NB_SNAP" = "" ]

   then

       echo "*** How many snapshot to keep ? ***"

   else

       echo "*** Creation of the configuration file ***"

       FILE_NAME=$(echo "snapshot-"${NAME_VOL//\//-})

       >$DIR_CONF_SNAPSHOT$FILE_NAME.conf

       echo "name=$NAME_VOL" > $DIR_CONF_SNAPSHOT$FILE_NAME.conf

       echo "nbsnapshots=$NB_SNAP" >> $DIR_CONF_SNAPSHOT$FILE_NAME.conf

       echo "type=$TYPE_ZFS" >> $DIR_CONF_SNAPSHOT$FILE_NAME.conf

       break

   fi

done

echo "*** Snapshots Frequency ***"

echo "1 - Every days"

echo "2 - Every weeks"

echo "3 - Every Months"

echo "*******************************"

while read inputline

do

   case $inputline in

    "1" )

          echo "*** Enter the Time (HH:MM) "

          while read inputheure

          do

             if [[ "$inputheure" =~ [0-9][0-9]":"[0-9][0-9] ]]

             then

                echo "Snapshot will be taken at : $inputheure"

                H_DEBUT=$(echo $inputheure |cut -d":" -f1)

                M_DEBUT=$(echo $inputheure |cut -d":" -f2)

                echo "$M_DEBUT $H_DEBUT * * * root $BIN_ZFS_SNAPSHOT $DIR_CONF_SNAPSHOT$FILE_NAME.conf" > $DIR_CRON$FILE_NAME

                break;

             else

                echo "*** Enter the Time (HH:MM) "

             fi

          done

          break ;;

    "2" )

          echo "*** Select day of week : 0-6 (0 is sunday) "

          while read inputjour

          do

             if [[ "$inputjour" =~ [0-9] ]]

             then

                 echo "*** Enter the Time (HH:MM) "

                 while read inputheure

                 do

                    if [[ "$inputheure" =~ [0-9][0-9]":"[0-9][0-9] ]]

                    then

                       echo "Snapshot will be taken at : $inputheure"

                       H_DEBUT=$(echo $inputheure |cut -d":" -f1)

                       M_DEBUT=$(echo $inputheure |cut -d":" -f2)

                       break;

                    else

                       echo "*** Enter the Time (HH:MM) "

                    fi

                  done

                  echo "$M_DEBUT $H_DEBUT * * $inputjour root $BIN_ZFS_SNAPSHOT $DIR_CONF_SNAPSHOT$FILE_NAME.conf" > $DIR_CRON$FILE_NAME

                  echo "*** Snapshot Configuration [OK]"

                  break;

             else

                 echo "*** Select day of week : 0-6 (0 is sunday) "

             fi

          done

          break ;;

     "3" )

          echo "*** Selelct day of month : 01-30"

          while read inputjour

          do

             if [[ "$inputjour" =~ [0-9][0-9] ]]

             then

                 echo "*** Enter the Time (HH:MM) "

                 while read inputheure

                 do

                    if [[ "$inputheure" =~ [0-9][0-9]":"[0-9][0-9] ]]

                    then

                       echo "Snapshot will be taken at : $inputheure"

                       H_DEBUT=$(echo $inputheure |cut -d":" -f1)

                       M_DEBUT=$(echo $inputheure |cut -d":" -f2)

                       break;

                    else

                       echo "*** Enter the Time (HH:MM) "

                    fi

                  done

                  echo "$M_DEBUT $H_DEBUT $inputjour * * root $BIN_ZFS_SNAPSHOT $DIR_CONF_SNAPSHOT$FILE_NAME.conf" > $DIR_CRON$FILE_NAME

                  echo "*** Snapshot configuration [OK]"

                  break;

             else

                 echo "*** Select the day of month : 01-30 "

             fi

          done

          break ;;

   esac

   echo "*** Snapshots Frequency *** "

   echo "1 - Every days"

   echo "2 - Every weeks"

   echo "3 - Every months"

   echo "*******************************"

done

/etc/init.d/cron restart

}

while getopts "im:H:D:M:d:N:t:k:h" OPTION

do

     case $OPTION in

         h)

             usage

             exit 1

             ;;

         i)

            interactive

            exit 0

            ;;

         m)

            checkField4Cron

            MINUTE=$OPTARG

            ;;

         H)

            checkField4Cron

            HOUR=$OPTARG

            ;;

         D)

            checkField4Cron

            DAYMONTH=$OPTARG

            ;;

         M)

            checkField4Cron

            MONTH=$OPTARG

            ;;

         d)

            checkField4Cron

            DAYWEEK=$OPTARG

            ;;

         N)

            NAMEZFS=$OPTARG

            ;;

         t)

            TYPEZFS=$OPTARG

            ;;

         k)

            SNAP2KEEP=$OPTARG

            ;;

         *)

            usage

            exit 1

            ;;

     esac

done

if [[ -z $MINUTE ]] || [[ -z $HOUR ]] || [[ -z $DAYMONTH ]] || [[ -z $MONTH ]] || [[ -z $DAYWEEK ]] || [[ -z $NAMEZFS ]] || [[ -z $TYPEZFS ]] || [[ -z $SNAP2KEEP ]]

then

     usage

     exit 1

fi

createCronFile4Snapshot

/etc/init.d/cron restart