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< h1 > MySQL backup script< / h1 >
< span class = "meta" > Posted by
< a href = "https://captainark.net/author/antoine-joubert.html" > Antoine Joubert< / a >
on Sun 13 March 2016
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< p > I wrote a MySQL database backup script a while back. I known they are more than enough of them already floating around the internet, but hey, I figured I'd share it here anyway.< / p >
< h2 > The script< / h2 >
< p > For the script to work, you'll need to edit a few variable to match your configuration.< / p >
< ul >
< li > < code > BACKUPDIR< / code > is the path of the directory where you want your backups to be stored.< / li >
< li > < code > BACKUPUSR< / code > is the user that will connect to MySQL to dump the databases. It should have access to all you databases without needing a password.< / li >
< li > < code > EXCLUDELIST< / code > is a list of databases that should not be backed-up. Leaving it as is is probably fine.< / li >
< / ul >
< div class = "highlight" > < pre > < span > < / span > < span class = "ch" > #!/bin/bash< / span >
< span class = "nv" > BACKUPDIR< / span > < span class = "o" > =< / span > < span class = "s2" > " /home/user/backup" < / span >
< span class = "nv" > BACKUPUSR< / span > < span class = "o" > =< / span > < span class = "s2" > " user" < / span >
< span class = "nv" > EXCLUDELIST< / span > < span class = "o" > =< / span > < span class = "s2" > " ^Databases< / span > $< span class = "s2" > |^information_schema< / span > $< span class = "s2" > |^mysql< / span > $< span class = "s2" > |^performance_schema< / span > $< span class = "s2" > " < / span >
sqlbk< span class = "o" > ()< / span > < span class = "o" > {< / span >
< span class = "k" > for< / span > each in < span class = "k" > $(< / span > mysqlshow < span class = "p" > |< / span > awk < span class = "s1" > ' /[[:alnum:]]/{print $2}' < / span > < span class = "k" > )< / span > < span class = "p" > ;< / span > < span class = "k" > do< / span >
< span class = "k" > if< / span > < span class = "o" > [[< / span > < span class = "nv" > $each< / span > < span class = "o" > =< / span > ~ < span class = "nv" > $EXCLUDELIST< / span > < span class = "o" > ]]< / span > < span class = "p" > ;< / span > < span class = "k" > then< / span >
< span class = "nb" > true< / span >
< span class = "k" > else< / span >
mysqldump < span class = "nv" > $each< / span > < span class = "p" > |< / span > bzip2 > < span class = "si" > ${< / span > < span class = "nv" > BACKUPDIR< / span > < span class = "si" > }< / span > /< span class = "si" > ${< / span > < span class = "nv" > each< / span > < span class = "si" > }< / span > .sql.bz2
chown < span class = "si" > ${< / span > < span class = "nv" > BACKUPUSR< / span > < span class = "si" > }< / span > : < span class = "si" > ${< / span > < span class = "nv" > BACKUPDIR< / span > < span class = "si" > }< / span > /< span class = "si" > ${< / span > < span class = "nv" > each< / span > < span class = "si" > }< / span > .sql.bz2 < span class = "o" > & & < / span > chmod < span class = "m" > 600< / span > < span class = "si" > ${< / span > < span class = "nv" > BACKUPDIR< / span > < span class = "si" > }< / span > /< span class = "si" > ${< / span > < span class = "nv" > each< / span > < span class = "si" > }< / span > .sql.bz2
< span class = "k" > fi< / span >
< span class = "k" > done< / span >
< span class = "o" > }< / span >
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< span class = "o" > [[< / span > -e /etc/init.d/mysql < span class = "o" > ]]< / span > < span class = "o" > & & < / span > sqlbk
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< / pre > < / div >
< p > I personnaly have this script running once a week, in my user's personnal crontab (editable using the < code > crontab -e< / code > command) :< / p >
< div class = "highlight" > < pre > < span > < / span > ## WEEKLY DATABASE BACKUP
@weekly /home/user/bin/backupdb
< / pre > < / div >
< h1 > Conclusion< / h1 >
< p > You've probably noticed that the script erases the previous backup when a new one is made.< / p >
< p > I don't need to keep multiple versions of the same database backup on my servers because they are all saved remotely on a daily basis using < a href = "http://rsnapshot.org/" > Rsnapshot< / a > . I'll probably write an article on the subject in the future.< / p >
< p > As usual, feedback is always appreciated !< / p >
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