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scripts-admin-quickndirty-p.../sauvegarde_mysql.sh

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#!/bin/sh
# Configuration
# Files will be named BASE_DIR/PREFIXEbasenameSUFFIXE
BASE_DIR="/var/backups/bdd"
MYSQL_EXTRA_ARGS=""
MYSQLDUMP_EXTRA_ARGS="--add-drop-table"
PREFIXE="sauv_mysql_"
SUFFIXE=_$( date +%Y%m%d-%H%M%S ).sql.gz
NB_DAYS_BEFORE_DELETION="30"
BASES_EXCLUDED="information_schema
performance_schema"
# Small note for a backup of a random directory in crontab
# test -d /var/backups/www && cd /var/www && tar -czf /var/backups/www/www_$( date +\%Y\%m\%d-\%H\%M\%S ).tar.gz ./ && find /var/backups/www -maxdepth 1 -name 'www_*' -mtime +10 -delete
# Stop at first non-catched error
set -e
#
# Help function
#
usage() {
TMP_BASES_EXCLUDED="$( echo "$BASES_EXCLUDED" | tr '\n' " " )"
cat <<EOF
Usage :
$0 [ -x mysql_extra_arg ] [ -X mysqldump_extra_args ] [ -d nb_days_before_deletion ] [ -B base_dir ] [ -p prefix ] [ -z -e base_excluded ] [ base base...]
Example :
$0 -e mysql -e information_schema -e performance_schema -d 10
Default values :
mysql_extra_args: "$MYSQL_EXTRA_ARGS" (for ex.: "--defaults-extra-file=/var/backup/my.cnf" )
mysqldump_extra_args: "$MYSQLDUMP_EXTRA_ARGS" (for ex.: "--defaults-extra-file=/var/backup/my.cnf --add-drop-table" )
nb_days_before_deletion : "$NB_DAYS_BEFORE_DELETION" (if <0 deactivate)
base_dir : "$BASE_DIR"
prefix : "$PREFIXE"
base_excluded : "$TMP_BASES_EXCLUDED"
base base ... : by default, take every base shown by SHOW DATABASES
EOF
}
# Lower script priority
renice -n 20 $$ >/dev/null 2>&1
#
# Parameters management
#
while getopts hd:B:p:ze:x:X: f; do
case "$f" in
'h')
usage
exit
;;
'd')
NB_DAYS_BEFORE_DELETION="$OPTARG"
;;
'B')
BASE_DIR="$OPTARG"
;;
'p')
PREFIXE="$OPTARG"
;;
'z')
BASES_EXCLUDED=""
;;
'e')
if [ -z "$BASES_EXCLUDED" ]; then
BASES_EXCLUDED="$OPTARG"
else
BASES_EXCLUDED="$( printf "%s\n%s" "$BASES_EXCLUDED" "$OPTARG" )"
fi
;;
'x')
MYSQL_EXTRA_ARGS="$OPTARG"
;;
'X')
MYSQLDUMP_EXTRA_ARGS="$OPTARG"
;;
\?)
usage
exit 1
;;
esac
done
shift $( expr $OPTIND - 1 )
# Initial checks
if [ ! -d "$BASE_DIR" ]; then
echo "ERREUR : répertoire de sauvegarde inexistant : $BASE_DIR ." >&2
exit 1
fi
if [ -z "$@" ]; then
# Listing des bases à sauvegarder
BASES="$( mysql $MYSQL_EXTRA_ARGS -Bse "SHOW DATABASES;" )"
else
BASES="$@"
fi
# Loop on bases' names
# We try to have a little fun here : MySQL can be quite laxist
# on base names, so we use <newline> as a separator. Quite a gymnastic
# ensue :)
printf "%s\n" "$BASES" | while read BASENAME; do
IFS="
"
for EXCLUDED_NAME in $BASES_EXCLUDED; do
if [ "$BASENAME" = "$EXCLUDED_NAME" ]; then
unset IFS
continue 2
fi
done
unset IFS
mysqldump $MYSQL_EXTRA_ARGS "$BASENAME" | gzip -c > "$BASE_DIR/$PREFIXE$BASENAME$SUFFIXE"
done
# Deletion of old backups
if [ "$NB_DAYS_BEFORE_DELETION" -gt "0" ]; then
find $BASE_DIR -maxdepth 1 -name "$PREFIXE*" -mtime +$NB_DAYS_BEFORE_DELETION -delete
fi