78 lines
1.4 KiB
Plaintext
78 lines
1.4 KiB
Plaintext
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#!/bin/bash
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# usage: backup_db dbname
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# Dump une base postgresql, et garde plusieurs dumps dans le passe
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# Les dumps sont compresses (gzip).
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#
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# E. Viennet pour ScoDoc, 2005-2011
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# Note: pour restaurer un backup (en supprimant la base existante !!!)
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# 1- supprimer la base existante si elle existe (dropdb)
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# 2- recreer la base, vide: createdb -E UTF-8 NOMDELABASE
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# 3- pg_restore --create -d SCOINFO SCOINFO_pgdump
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# Nombre de copies a conserver dans le passe:
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NUMBACK=500
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DBNAME=$1
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DUMPBASE=BACKUP-"$DBNAME"
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DUMPFILE="$DUMPBASE"/"$DBNAME"_pgdump
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function remove_leadings_zeros {
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n=$1
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if [ $n = "0000" ]; then
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echo 0
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else
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while [ "${n:0:1}" = '0' ]; do
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n=${n:1}
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done
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echo $n
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fi
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}
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# Check if base pathname for backups exist
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if [ ! -e ${DUMPBASE} ]; then
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mkdir ${DUMPBASE}
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fi
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# 1- rotate previous dumps
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if [ -e ${DUMPFILE}.gz ]
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then
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LIST=$(ls -r1 ${DUMPFILE}*)
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fi
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for i in $LIST; do
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x=${i#*.}
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num=${x%.*} # just the number
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num=$(remove_leadings_zeros $num)
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if [ "$i" != "$DUMPFILE".gz ]; then
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if [ $num -lt $NUMBACK ]; then
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# rename file
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base=${i%%.*}
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ni=$(($num+1))
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mv $i "$base".$(printf "%04d" $ni).gz
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else
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# remove file
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rm $i
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fi
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fi
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done
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# rename last dump to .0000
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if [ -e "$DUMPFILE".gz ]
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then
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mv "$DUMPFILE".gz "$DUMPFILE.0000.gz"
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fi
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# 2- dump
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#pg_dump "$DBNAME" > $DUMPFILE
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pg_dump --format=t "$DBNAME" -f $DUMPFILE
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gzip $DUMPFILE
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