I need a script that automatically makes a backup of a MySql Database. I know there are a lot of posts and scripts out there on this topic already but here is where mine differs.
Anyone have anything similar or any ideas where to start?
Answer : A cron
Description :
Try creating a file something.sh with this:
#!/bin/sh
mysqldump -u root -p pwd --opt db1.sql > /respaldosql/db1.sql
mysqldump -u root -p pwd --opt db2.sql > /respaldosql/db2.sql
cd /home/youuser/backupsql/
tar -zcvf backupsql_$(date +%d%m%y).tgz *.sql
find -name '*.tgz' -type f -mtime +2 -exec rm -f {} \;
Give the adequate permission to the file
chmod 700 mysqlrespaldo.sh
or
sudo chmod 700 something.sh
and then create a cron with
crontab -e
setting it like
**0 1 * * *** /home/youruser/coolscripts/something.sh
Remember that the numbers or '*' characters have this structure:
Minutes (range 0-59) Hours (0-23) Day of month (1-31) Month (1-12) Day of the week (0-6 being 0=Domingo) Absolute path to script or program to run
Create a shell script like the one below:
#!/bin/bash
mysqldump -u username -p'password' dbname > /my_dir/db_$(date+%m-%d-%Y_%H-%M-%S).sql
find /mydir -mtime +10 -type f -delete
Replace username, password and your backup directory(my_dir). Save it in a directory(shell_dir) as filename.sh
Schedule it to run everyday using crontab -e like:
30 8 * * * /shell_dir/filename.sh
This will run everyday at 8:30 AM and backup the database. It also deletes the backup which is older than 10 days. If you don't wanna do that just delete the last line from the script.
Doing pretty much the same like many people.
The script needs to run on the machine hosting the MySql database (It is a linux machine).
=> Create a local bash or perl script (or whatever) "myscript" on this machine "A"
The backups must be saved onto the same server that the database is on.
=> in the script "myscript", you can just use mysqldump . From the local backup, you may create a tarball that you send via scp to your remote machine. Finally you can put your backup script into the crontab (crontab -e).
Some hints and functions to get you started as I won't post my entire script, it does not fully do the trick but not far away :
#!/bin/sh
...
MYSQLDUMP="$(which mysqldump)"
FILE="$LOCAL_TARBALLS/$TARBALL/mysqldump_$db-$SNAPSHOT_DATE.sql"
$MYSQLDUMP -u $MUSER -h $MHOST -p$MPASS $db > $FILE && $GZIP $GZ_COMPRESSION_LEVEL $FILE
function create_tarball()
{
local tarball_dir=$1
tar -zpcvf $tarball_dir"_"$SNAPSHOT_DATE".tar.gz" $tarball_dir >/dev/null
return $?
}
function send_tarball()
{
local PROTOCOLE_="2"
local IPV_="4"
local PRESERVE_="p"
local COMPRESSED_="C"
local PORT="-P $DESTINATION_PORT"
local EXECMODE="B"
local SRC=$1
local DESTINATION_DIR=$2
local DESTINATION_HOST=$DESTINATION_USER"@"$DESTINATION_MACHINE":"$DESTINATION_DIR
local COMMAND="scp -$PROTOCOLE_$IPV_$PRESERVE_$COMPRESSED_$EXECMODE $PORT $SRC $DESTINATION_HOST &"
echo "remote copy command: "$COMMAND
[[ $REMOTE_COPY_ACTIVATED = "Yes" ]] && eval $COMMAND
}
Then to delete files older than "date", you can look at man find and focus on the mtime and newer options.
Edit: as said earlier, there is no particular interest in doing a local backup except a temproray file to be able send a tarball easily and delete it when sent.
You can do most of this with a one-line cronjob set to run every 30 minutes:
mysqldump -u<user> -p<pass> <database> > /path/to/dumps/db.$(date +%a.%H:%M).dump
This will create a database dump every 30 minutes, and every week it'll start overwriting the previous week's dumps.
Then have another cronjob that runs once a week that copies the most recent dump to a separate location where you're keeping snapshots.
My preference is for AutoMySQLBackup which comes with Debian. It's really easy and creates daily backups, which can be configured. As well, it stores on weekly and then one monthly backup as well.
I have had this running for a while and it's super easy to configure and use!
After a brief reading the question and the good answers i would add few more points. Some of them are mentioned already.
The backup process can involve next steps:
To compound a script to cover all the backup steps you need an effort and knowledge.
I would like to share a link to an article (i'm one of the writers) which describes the most used ways to backup MySQL databases with some details:
Bash script
# Backup storage directory backup_folder=/var/backups # Notification email address recipient_email=<username@mail.com> # MySQL user user=<user_name> # MySQL password password=<password> # Number of days to store the backup keep_day=30 sqlfile=$backup_folder/all-database-$(date +%d-%m-%Y_%H-%M-%S).sql zipfile=$backup_folder/all-database-$(date +%d-%m-%Y_%H-%M-%S).zip # Create a backup sudo mysqldump -u $user -p$password --all-databases > $sqlfile if [ $? == 0 ]; then echo 'Sql dump created' else echo 'mysqldump return non-zero code' | mailx -s 'No backup was created!' $recipient_email exit fi # Compress backup zip $zipfile $sqlfile if [ $? == 0 ]; then echo 'The backup was successfully compressed' else echo 'Error compressing backup' | mailx -s 'Backup was not created!' $recipient_email exit fi rm $sqlfile echo $zipfile | mailx -s 'Backup was successfully created' $recipient_email # Delete old backups find $backupfolder -mtime +$keep_day -delete
Automysqlbackup
sudo apt-get install automysqlbackup wget https://github.com/sixhop/AutoMySQLBackup/archive/master.zip mkdir /opt/automysqlbackup mv AutoMySQLBackup-master.zip cd /opt/automysqlbackup tar -zxvf AutoMySQLBackup-master.zip ./install.sh sudo nano /etc/automysqlbackup/automysqlbackup.conf CONFIG_configfile="/etc/automysqlbackup/automysqlbackup.conf" CONFIG_backup_dir='/var/backup/db' CONFIG_mysql_dump_username='root' CONFIG_mysql_dump_password='my_password' CONFIG_mysql_dump_host='localhost' CONFIG_db_names=('my_db') CONFIG_db_exclude=('information_schema') CONFIG_mail_address='mail@google.com' CONFIG_rotation_daily=6 CONFIG_rotation_weekly=35 CONFIG_rotation_monthly=150 automysqlbackup /etc/automysqlbackup/automysqlbackup.conf
Third party tools
Hope it would be helpful!
You might consider this Open Source tool, matiri, https://github.com/AAFC-MBB/matiri which is a concurrent mysql backup script with metadata in Sqlite3. Features (more than you were asking for...):
Full disclosure: original matiri author.
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