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#!/bin/bash |
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# $Id: zfs-replica 67 2016-04-18 13:58:46Z ltaulell $ |
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# Copyright (C) 2013 Kevin Reverchon, Loïs Taulelle |
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# This file/program is part of gZFS free software |
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# See COPYING file for details |
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# |
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|
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#--- Define variables ---# |
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DIR_CONF_REPLICA="/opt/gZFS/replicas/" |
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getConfigSnapshotTool="/sbin/get-conf-snapshot" |
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zfsSnapshot="/sbin/zfs-snapshot" |
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FILE_NAME=$1 |
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TEMP_FILE_NAME="$1-tmp" |
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>$TEMP_FILE_NAME |
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BINZFS="/sbin/zfs" |
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BINZPOOL="/sbin/zpool" |
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BINMBUFFER="mbuffer -4 -v 0 -q -s 128k -m 1G" |
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LOCALHOST=$(hostname -s) |
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|
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LOGFILEROTATE=21 |
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LOGDIR="/var/log/zfs-replica" |
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|
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if [ "$2" == "--cronlog" ]; |
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then |
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LOG=true |
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if [ ! -d $LOGDIR ]; |
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then |
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mkdir -p $LOGDIR |
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fi |
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else |
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LOG=false |
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fi |
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|
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#******************************** |
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#* function ok_exit |
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#******************************* |
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function ok_exit {
|
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if $LOG; then |
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echo $1 1>&2 |
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# restauration de stderr et stdout, fermeture des fd temporaires |
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exec 2>&7 7>&- |
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exec 1>&6 6>&- |
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fi |
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exit 0 |
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} |
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|
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#******************************** |
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#* function err_exit |
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#******************************* |
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function err_exit {
|
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if $LOG; then |
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echo $1 1>&2 |
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# restauration de stderr et stdout, fermeture des fd temporaires |
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exec 2>&7 7>&- |
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exec 1>&6 6>&- |
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fi |
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cat $LOGFILE |
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exit 1 |
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} |
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|
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#******************************** |
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#* function initenv |
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#******************************* |
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function initenv {
|
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if [[ -z $FILE_NAME ]] |
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then |
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echo "/!\\ Replica Configuration file missing /!\\" 1>&2 |
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exit 1 |
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fi |
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|
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if [ ! -s $FILE_NAME ] |
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then |
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echo "Replica Configuration file not found" |
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exit 0 |
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fi |
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lastsnapshotReplicated=$(cat $FILE_NAME|grep lastsnapshotreplicated|cut -d "=" -f2) |
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server=$(cat $FILE_NAME|grep server|cut -d "=" -f2) |
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nbreplica=$(cat $FILE_NAME|grep nbreplica|cut -d "=" -f2) |
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namereplica=$(cat $FILE_NAME|grep namereplica|cut -d "=" -f2) |
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namevolfs=$(cat $FILE_NAME|grep "name="|cut -d "=" -f2) |
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|
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if $LOG; |
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then |
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LOGFILE="$LOGDIR/${namevolfs//\//-}.log"
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|
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if [ -f $LOGFILE ]; |
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then |
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savelog -t -c $LOGFILEROTATE -q -n $LOGFILE |
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fi |
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|
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# sauvegarde de stdout et stderr dans des fd (file descriptor) temporaires |
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#+redirection de stdout vers $TMPFILE |
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#+redirection de stderr vers stdout |
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#+ = ">> $TMPFILE 2>&1" |
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exec 6>&1 7>&2 |
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exec 1>$LOGFILE |
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exec 2>&1 |
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fi |
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|
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if [[ -z $namereplica ]] || [[ -z $nbreplica ]] || [[ -z $namevolfs ]] |
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then |
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err_exit "Incoherence data in $FILE_NAME" |
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fi |
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|
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echo "$getConfigSnapshotTool $namevolfs" |
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getlistSnapshot=$($getConfigSnapshotTool $namevolfs) |
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if [[ "$getlistSnapshot" == "" ]] |
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then |
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err_exit "Please, enable a snapshot configuration for $namevolfs" |
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fi |
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} |
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|
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#**************************************** |
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#* function check server ssh connection |
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#*************************************** |
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function checkServerConnection {
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|
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ssh -o BatchMode=yes root@$server date |
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|
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if [ "$?" != "0" ] |
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then |
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err_exit "SSH Connection server $server failed, please check the private/public key" |
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fi |
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|
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} |
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|
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function computePort {
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# add a number, based on replica name, to mbuffer base port. |
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# This try to avoid problems, on multiple replicas cases, such as reception of |
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# different replicas on same mbuffer port: yeah, epic fail! |
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BasePORT="1030" |
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#for i in $(echo $snapshot2replicate| od -An -t u1); do j=$(($j+$i)); echo $j; done |
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SumChar=0 |
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BaseChars=$(echo $snapshot2replicate | od -An -t u1) |
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for i in $BaseChars |
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do |
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SumChar=$(($SumChar+$i)) |
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done |
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PORT=$(($BasePORT+$SumChar)) |
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} |
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|
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|
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function checkCoherence {
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ssh -o BatchMode=yes root@$server $BINZFS list $namereplica |
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if [ "$?" != "0" ] |
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then |
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return false |
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fi |
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|
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} |
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|
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function del_old_snapshot {
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#*** ETAPE SUPPRESSION DES SNAPSHOTS OBSELETES ***# |
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if [[ "$server" == "" ]] |
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then |
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echo "" |
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CPT_SNAP=$($BINZFS list -t snapshot -r $namereplica |cut -d" " -f1 |grep -i $namereplica\@ |wc -l) |
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echo "*** Number of snapshots for $namereplica is : $CPT_SNAP" |
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$BINZFS list -t snapshot -r $namereplica |
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|
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if [ $CPT_SNAP -gt $nbreplica ] |
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then |
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echo "*** Detection of the oldest snapshot" |
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for ID_SNAP_OLDER in $($BINZFS list -t snapshot -r $namereplica |cut -d" " -f1 |grep -i $namereplica\@) |
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do |
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echo "*** The oldest snapshot is : $ID_SNAP_OLDER" |
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break |
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done |
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$BINZFS destroy $ID_SNAP_OLDER |
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if [ $? -eq 0 ] |
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then |
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echo "*** Remove the snapshot $ID_SNAP_OLDER [OK]" |
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else |
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echo "/!\\ Remove the snapshot $ID_SNAP_OLDER [ERROR]." |
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fi |
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fi |
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|
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else |
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echo "" |
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CPT_SNAP=$(ssh -o BatchMode=yes root@$server $BINZFS list -t snapshot -r $namereplica |cut -d" " -f1 |grep -i $namereplica\@ |wc -l) |
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echo "*** Number of snapshots for $namereplica is : $CPT_SNAP" |
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ssh -o BatchMode=yes root@$server $BINZFS list -t snapshot -r $namereplica |
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|
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if [ $CPT_SNAP -gt $nbreplica ] |
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then |
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echo "*** Detection of the oldest snapshot" |
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for ID_SNAP_OLDER in $(ssh -o BatchMode=yes root@$server $BINZFS list -t snapshot -r $namereplica |cut -d" " -f1 |grep -i $namereplica\@) |
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do |
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echo "*** The oldest snapshot is : $ID_SNAP_OLDER" |
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break |
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done |
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ssh -o BatchMode=yes root@$server $BINZFS destroy $ID_SNAP_OLDER |
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if [ $? -eq 0 ] |
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then |
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echo "*** Remove the snapshot $ID_SNAP_OLDER [OK]" |
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else |
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echo "/!\\ Remove the snapshot $ID_SNAP_OLDER [ERROR]." |
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fi |
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fi |
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|
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fi |
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#*** FIN ETAPE SUPPRESSION DES SNAPSHOTS OBSELETES ***# |
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} |
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|
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|
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#************************************* |
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#* function FULL REPLICATION |
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#************************************* |
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function fullreplication {
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parentdataset=$(awk '{
|
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n = split($0, t, "/") |
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for (i = 0; ++i <= n-1;) |
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if (i == 1) |
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printf t[i] |
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else |
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printf "/"t[i] |
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}' <<< $(echo $namereplica)) |
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|
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if [[ "$server" == "" ]] |
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then |
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|
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$BINZFS list $parentdataset |
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if [[ "?" != "0" ]] |
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then |
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$BINZFS create -p $parentdataset |
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fi |
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|
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$BINZFS send $snapshot2replicate | $BINZFS recv $namereplica |
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if [[ "$?" == "0" ]] |
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then |
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while read line |
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do |
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$(echo $line|sed -e "s:lastsnapshotreplicated=.*$:lastsnapshotreplicated=$snapshot2replicate:g" >>$TEMP_FILE_NAME) |
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done <<< "$(cat $FILE_NAME)" |
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/bin/rm $FILE_NAME |
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/bin/mv $TEMP_FILE_NAME $FILE_NAME |
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del_old_snapshot |
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ok_exit |
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fi |
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|
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else |
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checkServerConnection |
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if [[ "$snapshot2replicate" != "" ]] |
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then |
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ssh -o BatchMode=yes root@$server $BINZFS list $parentdataset |
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if [[ "?" != "0" ]] |
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then |
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ssh -o BatchMode=yes root@$server $BINZFS create -p $parentdataset |
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fi |
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|
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# $BINZFS send $snapshot2replicate |ssh -o BatchMode=yes root@$server $BINZFS recv $namereplica |
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computePort |
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ssh -o BatchMode=yes root@$server "$BINMBUFFER -I $LOCALHOST:$PORT | $BINZFS recv $namereplica " & |
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sleep 5s # allow server to be ready |
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$BINZFS send $snapshot2replicate | $BINMBUFFER -O $server:$PORT |
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if [[ "$?" == "0" ]] |
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then |
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while read line |
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do |
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$(echo $line|sed -e "s:lastsnapshotreplicated=.*$:lastsnapshotreplicated=$snapshot2replicate:g" >>$TEMP_FILE_NAME) |
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done <<< "$(cat $FILE_NAME)" |
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/bin/rm $FILE_NAME |
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/bin/mv $TEMP_FILE_NAME $FILE_NAME |
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del_old_snapshot |
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ok_exit |
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fi |
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fi |
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fi |
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|
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} |
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|
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|
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|
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function incremental_replication {
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|
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echo "Start incremental replication for : $snasphot2replicate" |
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if [[ "$server" == "" ]] |
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then |
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$BINZFS send -i $lastsnapshotReplicated $namevolfs@$snasphot2replicate | $BINZFS recv $namereplica |
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snapshot2replicate="$namevolfs@$snasphot2replicate" |
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if [[ "$?" == "0" ]] |
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then |
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while read line |
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do |
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echo $line|sed -e "s:lastsnapshotreplicated=.*$:lastsnapshotreplicated=$snapshot2replicate:g" >>$TEMP_FILE_NAME |
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done <<< "$(cat $FILE_NAME)" |
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/bin/rm $FILE_NAME |
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/bin/mv $TEMP_FILE_NAME $FILE_NAME |
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del_old_snapshot |
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ok_exit |
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fi |
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else |
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checkServerConnection |
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if [ "$snasphot2replicate" == "" ] |
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then |
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err_exit |
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else |
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#$BINZFS send -i $lastsnapshotReplicated $namevolfs@$snasphot2replicate | ssh -o BatchMode=yes root@$server $BINZFS recv $namereplica |
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computePort |
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ssh -o BatchMode=yes root@$server "$BINMBUFFER -I $LOCALHOST:$PORT | $BINZFS recv $namereplica " & |
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sleep 5s # allow server to be ready |
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$BINZFS send -i $lastsnapshotReplicated $namevolfs@$snasphot2replicate | $BINMBUFFER -O $server:$PORT |
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snapshot2replicate="$namevolfs@$snasphot2replicate" |
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if [[ "$?" == "0" ]] |
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then |
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while read line |
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do |
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$(echo $line|sed -e "s:lastsnapshotreplicated=.*$:lastsnapshotreplicated=$snapshot2replicate:g" >>$TEMP_FILE_NAME) |
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done <<< "$(cat $FILE_NAME)" |
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/bin/rm $FILE_NAME |
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/bin/mv $TEMP_FILE_NAME $FILE_NAME |
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del_old_snapshot |
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ok_exit |
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fi |
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fi |
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fi |
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|
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} |
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|
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|
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#**************************************** |
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#* NO INTERACTIVE MODE |
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#**************************************** |
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function nointeractive {
|
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|
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#--- check and init env ---# |
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initenv |
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|
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fileconf=$($getConfigSnapshotTool $namevolfs|grep fileconf|cut -d "=" -f2) |
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NBsnapshot=$($BINZFS list -H -r -t snapshot $namevolfs|wc -l) |
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|
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if [[ $NBsnapshot -eq 0 ]] |
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then |
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echo "no snapshot, start snapshoting ..." |
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$zfsSnapshot $fileconf |
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fi |
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|
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valchk=checkCoherence |
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if [[ "$valchk" == "false" ]] && [[ "$lastsnapshotReplicated" != "" ]] |
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then |
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echo "Replication by incremental snapshot is not possible : checkcoherence return false " |
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echo "Start FULL Replication ..." |
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while read line |
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do |
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snapshot2replicate=$(echo $line |echo $line |sed -e "s/ \+/ /g"|cut -d " " -f1) |
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done <<< "$($BINZFS list -H -r -t snapshot $namevolfs)" |
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fullreplication |
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fi |
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|
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|
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#--- FULL REPLICATION ---# |
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if [[ $NBsnasphot -eq 1 ]] || [[ "$lastsnapshotReplicated" == "" ]] |
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then |
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echo "Replication by incremental snapshot is not possible" |
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echo "Start FULL Replication ..." |
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while read line |
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do |
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snapshot2replicate=$(echo $line |echo $line |sed -e "s/ \+/ /g"|cut -d " " -f1) |
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done <<< "$($BINZFS list -H -r -t snapshot $namevolfs)" |
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fullreplication |
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fi |
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|
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#-- INCREMENTAL REPLICATION ---# |
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if [[ $NBsnapshot -gt 1 ]] |
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then |
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cpt=1 |
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while read line |
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do |
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|
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if [[ $cpt -eq 1 ]] |
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then |
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snasphot2replicate=$(echo $line |sed -e "s/ \+/ /g"|cut -d " " -f1|cut -d "@" -f2) |
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echo $lastsnasphot |
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echo $snasphot2replicate |
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break |
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fi |
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cpt=$cpt+1 |
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done <<< "$($BINZFS list -H -r -t snapshot $namevolfs|tac)" |
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lastsnapshot=$(echo $lastsnapshotReplicated |sed -e "s/ \+/ /g"|cut -d " " -f1|cut -d "@" -f2) |
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|
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if [ "$snasphot2replicate" == "$lastsnapshot" ] |
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then |
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err_exit "Nothing to replicate" |
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|
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fi |
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if [ "$server" == "" ] |
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then |
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check_lastsnapshotReplica=$($BINZFS list -H -r -t snapshot $namereplica |grep $lastsnapshot|wc -l) |
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check_currentsnapshotReplica=$($BINZFS list -H -r -t snapshot $namereplica |grep $snasphot2replicate=|wc -l) |
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else |
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check_lastsnapshotReplica=$(ssh -o BatchMode=yes root@$server $BINZFS list -H -r -t snapshot $namereplica |grep $lastsnapshot|wc -l) |
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check_currentsnapshotReplica=$(ssh -o BatchMode=yes root@$server $BINZFS list -H -r -t snapshot $namereplica |grep $snasphot2replicate=|wc -l) |
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fi |
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if [[ $check_lastsnapshotReplica -eq 0 ]] |
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then |
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err_exit "Incoherence, incremental replication failed : $lastsnapshotReplicated is missing" |
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fi |
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|
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if [[ $check_currentsnapshotReplica -eq 1 ]] |
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then |
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err_exit "No replica to do, $lastSnapshot already exists" |
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fi |
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fi |
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echo $snasphot2replicate |
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incremental_replication |
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} |
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|
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nointeractive |
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|
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# restauration de stderr et stdout, fermeture des fd temporaires |
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exec 2>&7 7>&- |
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exec 1>&6 6>&- |
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|