Centre Blaise Pascal » gZFS

#!/bin/bash

# $Id: enable-replica 51 2013-10-10 11:20:37Z ltaulell $

# Copyright (C) 2013 Kevin Reverchon, Loïs Taulelle

# This file/program is part of gZFS free software

# See COPYING file for details

#

DIR_CONF_REPLICA="/opt/gZFS/replicas/"

DIR_CRON="/etc/cron.d/"

BIN_ZFS_REPLICA="/sbin/zfs-replica"

BINZFS="/sbin/zfs"

BINZPOOL="/sbin/zpool"

# TODO: traduire les msg

function usage {

  echo "USAGE :"

  echo "$0 -o volume_fs_to_replicate -r volume_fs_destination -n number_replicas_to_keep -m minute_cron -H hour_cron -D Day_of_Month_cron -M month_cron -d day_of_week_cron [-s server destination]" 1>&2

  echo "or" 1>&2

  echo "$0 -i : for a interactive mode" 1>&2

  echo "" 1>&2

  echo "OPTIONS : " 1>&2

  echo "  -o : origin volume or a filesystem to replicate" 1>&2

  echo "  -r : volume or filesystem replicated" 1>&2

  echo "  -n : number replicas to keep" 1>&2

  echo "  -s : if replica destination is on another zfs server, you need to specify this option with the name of server." 1>&2

  echo "      Warning ! Remote replication use ssh. So please, generate a ssh private/public key and the public key in /root/.ssh/authorized_key" 1>&2

  echo "      on remote server" 1>&2

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

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

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

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

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

  echo "  -h : display this message"

}

function checkField4Cron {

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

  then

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

     exit 1

  fi

}

function createCronFile4Snapshot {

FILE_NAME=$(echo "replica-"${volfs//\//-})

echo "$MINUTE $HOUR $MONTH $DAYMONTH $DAYWEEK root $BIN_ZFS_REPLICA $DIR_CONF_REPLICA$FILE_NAME.conf" > $DIR_CRON$FILE_NAME

}

function interactive {

$BINZFS list

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

while read inputline

do

   volfs=$inputline

   if [ "$volfs" = "" ]

   then

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

   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 $volfs

         if [ $? -eq 0 ]

         then

            echo "*** The ZFS volume/filesystem selected $volfs exists ***"

            break

         else

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

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

         fi

      fi

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

      then

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

      fi

   fi

done

echo "*** Enter replica name (syntax pool_name/replica_name, example zpfront/monvolume) ***" 

echo "*** /!\ This program does not check if the replica name is valid /!\***" 

while read inputline

do

   volfsdestination=$inputline

   if [ "$volfsdestination" = "" ]

   then

      echo "*** Enter replica name (syntax pool_name/replica_name, example zpfront/monvolume) ***" 

      echo "*** /!\ This program does not check if the replica name is valid /!\***" 

   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

         echo "*** Enter replica name (syntax pool_name/replica_name, example zpfront/monvolume) ***" 

         echo "*** /!\ This program does not check if the replica name is valid /!\***" 

      else

        break

      fi

   fi

done

echo "*** Replicate to a remote server (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

   echo "*** Enter server name : "

   while read inputserver

   do

      if [ "$inputserver" != "" ]

      then

         server=$inputserver

         break

      fi

      echo "*** Enter server name : "

   done

else

   server=""

fi

echo "*** Enter the replica number to keep : ***"

while read inputline

do

   nbreplica=$inputline

   if [ "$nbreplica" = "" ]

   then

     echo "*** Enter the replica number to keep : ***"

   else

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

     FILE_NAME=$(echo "replica-"${volfs//\//-})

     >$DIR_CONF_REPLICA$FILE_NAME.conf

      echo "name=$volfs" >> $DIR_CONF_REPLICA$FILE_NAME.conf

      echo "namereplica=$volfsdestination-replica">> $DIR_CONF_REPLICA$FILE_NAME.conf

      echo "nbreplica=$nbreplica" >> $DIR_CONF_REPLICA$FILE_NAME.conf

      echo "lastsnapshotreplicated=" >> $DIR_CONF_REPLICA$FILE_NAME.conf

      echo "server=$server">> $DIR_CONF_REPLICA$FILE_NAME.conf

     break

   fi

done

}

function nointeractive {

  FILE_NAME=$(echo "replica-"${volfs//\//-})

  >$DIR_CONF_REPLICA$FILE_NAME.conf

  echo "name=$volfs" >> $DIR_CONF_REPLICA$FILE_NAME.conf

  echo "namereplica=$volfsdestination-replica">> $DIR_CONF_REPLICA$FILE_NAME.conf

  echo "nbreplica=$nbreplica" >> $DIR_CONF_REPLICA$FILE_NAME.conf

  echo "lastsnapshotreplicated=" >> $DIR_CONF_REPLICA$FILE_NAME.conf

  echo "server=$server">> $DIR_CONF_REPLICA$FILE_NAME.conf

}

while getopts "is:r:o:n:m:H::D:M:d:h" OPTION

do

     case $OPTION in

         h)

             usage

             exit 1

             ;;

         r)

            volfsdestination=$OPTARG

            ;;

         o)

            volfs=$OPTARG

            ;;

         n)

            nbreplica=$OPTARG

            ;;

         s)

            server=$OPTARG

            ;;

         m)

            checkField4Cron

            MINUTE=$OPTARG

            ;;

         H)

            checkField4Cron

            HOUR=$OPTARG

            ;;

         D)

            checkField4Cron

            DAYMONTH=$OPTARG

            ;;

         M)

            checkField4Cron

            MONTH=$OPTARG

            ;;

         d)

            checkField4Cron

            DAYWEEK=$OPTARG

            ;;

         i)

            interactive

            exit 0

            ;;

     esac

done

if [[ -z $volfsdestination ]] || [[ -z $volfs ]] || [[ -z $nbreplica ]] || [[ -z $MINUTE ]] || [[ -z $HOUR ]] || [[ -z $DAYMONTH ]] || [[ -z $MONTH ]] || [[ -z $DAYWEEK ]] 

then

     usage

     exit 1

fi

nointeractive

createCronFile4Snapshot

/etc/init.d/cron restart