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#!/bin/bash
usage="$exname [--host HOST] [DATABASE...]"
DBS=()
host=
while [ "$1" ]; do
case "$1" in
"--help"|"-h")
echo "$usage" >&2
exit 0
;;
"--host")
host="$2"
shift
;;
*)
DBS+=("$1")
;;
esac
shift
done
mysql_opts=()
if [ "$host" ]; then
mysql_opts+=(-h "$host")
fi
m() {
mysql "${mysql_opts[@]}" -Bs "$@"
}
md() {
mysqldump "${mysql_opts[@]}" "$@"
}
mysql_databases() {
echo "SHOW DATABASES" | m
}
mysql_tables() {
local db="$1"
echo "SHOW TABLES" | m "$db"
}
if [ "${#DBS[@]}" == 0 ]; then
DBS=($(mysql_databases)) || exit 1
fi
mkdir -p /var/backups/mysql
for db in "${DBS[@]}"; do
if [[ "$db" == "information_schema" || "$db" == "performance_schema" || "$db" == "mysql" ]]; then
continue
fi
echo "Dumping database $db..." >&2
# omitting all the rotation logic
dst=/"var/backups/mysql/$db"
[ -d "$dst.old" ] && rm -rf "$dst.old"
[ -d "$dst" ] && mv "$dst" "$dst.old"
mkdir -p "$dst.inprogress"
(( start = SECONDS ))
md "$db" --routines --no-data --add-drop-database --database "$db" | gzip --rsyncable > "$dst.inprogress/00-schema.sql.gz"
tables=$(mysql_tables "$db")
for table in $tables; do
backup_file="$dst.inprogress/${table}.sql.gz"
echo " Dumping $table into ${backup_file}"
md "$db" "$table" | gzip --rsyncable > "$backup_file" || break
done
mv "$dst.inprogress" "$dst"
[ -d "$dst.old" ] && rm -rf "$dst.old"
(( elapsed = SECONDS - start ))
echo " ..dumped $db to $dst ($(du -sh "$dst" | cut -f 1) in ${elapsed}s)" >&2
done