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backup-mysql
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Yavuz Aydın 2019-01-24 13:29:29 +01:00
parent f92ef15743
commit 05281acae2
2 changed files with 68 additions and 30 deletions
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47
README.md
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@ -2,18 +2,57 @@
# MySQL / MariaDB backup script #
Allows you to create and restore local MySQL / MariaDB backups
Allows you to create and restore local MySQL / MariaDB backups.
# Requirements #
Requires a /root/.my.cnf file which contains credentials so the user root can login to the MySQL server with sufficient privileges without entering a password. Example /root/.my.cnf contents:
```
[client]
user=root
password=mysecretpassword
```
Don't forget to change the permissions:
```
sudo chmod 600 /root/.my.cnf
```
Test if it works with:
```
PING=$(sudo mysqladmin ping 2>/dev/null)
if [ "$PING" != "mysqld is alive" ]; then
clear && echo "Error: Unable to connect to MySQL Server!"
else
clear && echo "Successfully connected to the MySQL server!"
fi
```
## Install script ##
```
sudo wget -O /usr/local/sbin/backup_mysql.sh
sudo wget -O /usr/local/sbin/backup_mysql.sh https://git.snel.com/snelcom/backup-mysql/raw/branch/master/backup_mysql.sh
sudo chmod 700 /usr/local/sbin/backup_mysql.sh
```
## Install cronjob ##
TBD
This will add a cronjob to root which will run this script daily at 0:10 am. Adjust as necessary.
```
(sudo crontab -l 2>/dev/null; sudo echo '10 0 * * * test -x /usr/local/sbin/backup_mysql.sh && /usr/local/sbin/backup_mysql.sh') | sudo crontab -
```
## Recover database ##
TBD
Assuming you want to restore mytestdb from your backups made on 20190121-1540:
```
DB='mytestdb'
BACKUPDIR='/var/backup/mysql/20190121-1540'
sudo mysql -e "CREATE DATABASE IF NOT EXISTS ${DB}"
sudo -i bash -c 'for table in ${BACKUPDIR}/${DB}/*; do gunzip -c $table | mysql ${DB}; done'
exit
```

51
backup_mysql.sh
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@ -48,9 +48,8 @@
# #
# DB='mytestdb' #
# BACKUPDIR='/var/backup/mysql/20190121-1540' #
# mysql -e "CREATE DATABASE ${DB}" #
# cd ${BACKUPDIR}/${DB} #
# for table in *; do gunzip -c $table | mysql ${DB}; done #
# mysql -e "CREATE DATABASE IF NOT EXISTS ${DB}" #
# for table in ${BACKUPDIR}/${DB}/*; do gunzip -c $table | mysql ${DB}; done #
# #
# With myloader (backups should have been created with mydumper): #
# #
@ -89,12 +88,12 @@ fi
index=0
# Check if we can connect to the mysql server; otherwise die
if [ ! "$(id -u -n)" = "root" ]; then
echo -e "Error:: $0 : Only user 'root' can run this script"
echo -e "Error: $0 : Only user 'root' can run this script"
exit 100
fi
PING=$(mysqladmin ping 2>/dev/null)
if [ "$PING" != "mysqld is alive" ]; then
echo "Error:: Unable to connected to MySQL Server, exiting !!"
echo "Error: Unable to connected to MySQL Server, exiting!"
exit 101
fi
# Backup process starts here.
@ -105,46 +104,46 @@ mysql -e "FLUSH LOGS"
if [ $USE_MYDUMPER -eq 1 ]; then
# Use mydumper
DB_BKP_FLDR=$BASE_BAK_FLDR/${START_DATETIME}
[ ! -d $DB_BKP_FLDR ] && mkdir -p $DB_BKP_FLDR && chmod 700 $DB_BKP_FLDR
$MYDUMPER -o $DB_BKP_FLDR -G -E -R --less-locking -r 500000 -c -e -L $DB_BKP_FLDR/mydumper.log -v 3
DB_BKP_FLDR=${BASE_BAK_FLDR}/${START_DATETIME}
[ ! -d ${DB_BKP_FLDR} ] && mkdir -p ${DB_BKP_FLDR} && chmod 700 ${DB_BKP_FLDR}
${MYDUMPER} -o ${DB_BKP_FLDR} -G -E -R --less-locking -r 500000 -c -e -L ${DB_BKP_FLDR}/mydumper.log -v 3
else
# Use traditional mysqldump
# Loop through the DB list and create table level backup,
# applying appropriate option for MyISAM and InnoDB tables.
for DB in $DBS_LIST; do
DB_BKP_FLDR=$BASE_BAK_FLDR/${START_DATETIME}/$DB
[ ! -d $DB_BKP_FLDR ] && mkdir -p $DB_BKP_FLDR && chmod 700 $DB_BKP_FLDR
for DB in ${DBS_LIST}; do
DB_BKP_FLDR=${BASE_BAK_FLDR}/${START_DATETIME}/${DB}
[ ! -d ${DB_BKP_FLDR} ] && mkdir -p ${DB_BKP_FLDR} && chmod 700 ${DB_BKP_FLDR}
# Get the schema of database with the stored procedures.
# This will be the first file in the database backup folder
mysqldump -R -d --single-transaction $DB | gzip -c > $DB_BKP_FLDR/000-DB_SCHEMA.sql.gz
mysqldump -R -d --single-transaction ${DB} | gzip -c > ${DB_BKP_FLDR}/000-DB_SCHEMA.sql.gz
index=0
#Get the tables and its type. Store it in an array.
table_types=($(mysql -e "show table status from $DB" | awk '{ if ($2 == "MyISAM" || $2 == "InnoDB") print $1,$2}'))
table_types=($(mysql -e "show table status from ${DB}" | awk '{ if ($2 == "MyISAM" || $2 == "InnoDB") print $1,$2}'))
table_type_count=${#table_types[@]}
# Loop through the tables and apply the mysqldump option according to the table type
# The table specific SQL files will not contain any create info for the table schema.
# It will be available in SCHEMA file
while [ "$index" -lt "$table_type_count" ]; do
while [ "${index}" -lt "${table_type_count}" ]; do
START=$(date +%s)
TYPE=${table_types[$index + 1]}
table=${table_types[$index]}
#echo -en "$(date) : backup $DB : $table : $TYPE "
if [ "$TYPE" = "MyISAM" ]; then
DUMP_OPT="$DB --no-create-info --tables --events --quote-names "
TYPE=${table_types[${index} + 1]}
table=${table_types[${index}]}
#echo -en "$(date) : backup ${DB} : ${table} : ${TYPE} "
if [ "${TYPE}" = "MyISAM" ]; then
DUMP_OPT="${DB} --no-create-info --tables --events --quote-names "
else
DUMP_OPT="$DB --no-create-info --single-transaction --tables --events --quote-names "
DUMP_OPT="${DB} --no-create-info --single-transaction --tables --events --quote-names "
fi
mysqldump $DUMP_OPT $table |gzip -c > $DB_BKP_FLDR/$table.sql.gz
index=$(($index + 2))
#echo -e " - Total time : $(($(date +%s) - $START))\n"
mysqldump ${DUMP_OPT} ${table} |gzip -c > ${DB_BKP_FLDR}/${table}.sql.gz
index=$((${index} + 2))
#echo -e " - Total time : $(($(date +%s) - ${START}))\n"
done
done
fi
# Rotating old backup. according to the 'RM_FLDR_DAYS'
if [ ! -z "$RM_FLDR_DAYS" ]; then
if [ ! -z "${RM_FLDR_DAYS}" ]; then
#echo -en "$(date) : removing folder : "
find $BASE_BAK_FLDR/ -maxdepth 1 -mtime $RM_FLDR_DAYS -type d -exec rm -rf {} \;
find ${BASE_BAK_FLDR}/ -maxdepth 1 -mtime ${RM_FLDR_DAYS} -type d -exec rm -rf {} \;
#echo
fi
fi