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Backup all MySQL Databases?

Discussion in 'Data Protection' started by keat63, Feb 27, 2019.

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  1. keat63

    keat63 Well-Known Member

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    I'm about to update MYSQL at the weekend.
    Is there a way I can perform a backup of just the databases.

    I can't do this as an export through PHP MyAdmin, as I suffer timeouts or memory space issues.
     
    #1 keat63, Feb 27, 2019
  2. rpvw

    rpvw Well-Known Member

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    Backup all MySQL Databases to individual files
    Code:
    for I in $(mysql -e 'show databases' -s --skip-column-names); do mysqldump $I | gzip > "$I.sql.gz"; done
    Backup everything to one file
    Code:
    mysqldump --all-databases > all_databases.sql
     
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    #2 rpvw, Feb 27, 2019
  3. GOT

    GOT Get Proactive! PartnerNOC

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    The previous reply is a good way to go A alternative if you think you may need to roll back the mysql version is to make a copy of the mysql data files To do this properly you have to take several steps.

    Go into service manager and uncheck monitor for mysql

    service stop mysql

    cp -rav /var/lib/mysql /var/lib/mysql.bak

    service mysql start

    Then you can perform the upgrade.

    Rolling it back is a whole different process but this would allow for a speedy roll back if it was required.
     
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    #3 GOT, Feb 27, 2019
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  4. keat63

    keat63 Well-Known Member

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    Is it really this simple or am I being nieve.

    If I FTP off the server var/lib/mysql
    Perform the upgrade.

    If anything goes wrong, roll back to MYSQL 5.6 and ftp the folder back up. ?

    I just did a dummy run on the ftp and it only took 5 minutes.
     
    #4 keat63, Feb 27, 2019
  5. GOT

    GOT Get Proactive! PartnerNOC

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    The key here is that when you copy or download the files whichever it is mysql has to not be running
     
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    #5 GOT, Feb 27, 2019
  6. keat63

    keat63 Well-Known Member

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    And no doubt I'll have to shutdown apache to stop new data being added by web site users.
     
    #6 keat63, Feb 27, 2019
  7. GOT

    GOT Get Proactive! PartnerNOC

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    No you just need to have the mysql service off.
     
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    #7 GOT, Feb 27, 2019
  8. keat63

    keat63 Well-Known Member

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    doh... of course.
     
    #8 keat63, Feb 27, 2019
  9. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    Hello @keat63,

    One aspect of the upgrade to keep in-mind is that downgrading back to MySQL version 5.6 isn't a supported action if the MySQL upgrade succeeds (if the upgrade fails then MySQL 5.6 will remain installed).

    Thank you.
     
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    #9 cPanelMichael, Feb 27, 2019
  10. keat63

    keat63 Well-Known Member

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    Thats reassuring and good to know.
     
    #10 keat63, Feb 28, 2019
  11. keat63

    keat63 Well-Known Member

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    The update from MySQL 5.6 to 5.7 appears to have gone without a hitch (finger crossed), and went a lot quicker than I expected.
    Thanks for the info.

    One thing I picked up on though.
    After the update, I tried to stop the MySql service to update my.cnf (to disable strict mode), but the command 'service mysql stop' comes back with an error saying unrecognised service.

    Any ideas ?
     
    #11 keat63, Mar 1, 2019
  12. Tiberiu

    Tiberiu Registered

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    Dont stop Cpanel services by running service xxx stop, instead you should run /scripts/restartsrv_service --stop.
    Dont forget do disable mysql from tailwatch from WHM > service manager otherwise it will restart your service if it detects its down.
     
    #12 Tiberiu, Mar 1, 2019
  13. keat63

    keat63 Well-Known Member

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    Prior to the update, I disabled tailwatch, then via terminal I ran 'service mysql stop'
    This echo'd back that the service had stopped.
    I took my backups, then retstarted mysql before running the update process.

    The update appears to have gone without a hitch.
    Next I modified 'my.cnf' to disable strict mode, but this time, I was unable to stop the mysql service using 'service mysql stop'
    Instead I restarted my sql via the whm gui.

    Just wondered why it would stop when at 5.6 but not when at 5.7.
     
    #13 keat63, Mar 4, 2019
  14. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    Hello @keat63,

    MySQL version 5.7 comes with native support for systemd:

    MySQL :: MySQL 5.7 Reference Manual :: 2.5.10 Managing MySQL Server with systemd

    You should always restart the service using /scripts/restartsrv_mysql, however if for some reason it doesn't work and you need to restart the service directly, use the following command (on CentOS 7):

    Code:
    systemctl restart mysqld
    The service command will automatically redirect to the corresponding systemctl command, but as of MySQL 5.7 you need to enter "mysqld" as the service name instead of "mysql".

    Thank you.
     
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    #14 cPanelMichael, Mar 4, 2019
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