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computing:migratewp

  • migratewp
  • Jonathan Haack
  • Haack's Networking
  • netcmnd@jonathanhaack.com

migratewp


This tutorial is designed to step one through how to migrate a self-hosted Word Press site manually. First, completely set up LAMP and TLS and DNS, etc., before you begin migration, and review Apache Survival if you are unclear on how to do that. Now, once that is set up, authenticate as root on the old host and backup your entire database (thanks to @jjscha for this mysqldump syntax):

sudo -i
/usr/bin/mysqldump    \
--add-drop-database \
--all-databases     \
--allow-keywords    \
--comments          \
--complete-insert   \
--lock-all-tables   \
--skip-dump-date    \
--events            \
--flush-logs        \
--flush-privileges  \
--hex-blob          \
--opt               \
--routines          \
> mysqldump-all-databases.sql

Use scp to get the file to the new host:

sudo scp mysqldump-all-databases.sql user@newhostorip.com:

Before your import the mysqldump databases into the new database, you need to create what I call a “surrogate” user and database to do the heavy lifting for you first. You will also grant this surrogate user super privileges. Make sure the name you pick is unique and was not present in the database backup and/or a restricted user name.

CREATE DATABASE newdatabase DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
GRANT ALL ON newdatabase.* TO 'newdatabaseuser'@'localhost' IDENTIFIED BY 'temporarypassword';
FLUSH PRIVILEGES;
EXIT;
CREATE USER 'newdatabaseuser'@'%' IDENTIFIED BY 'temporarypassword';
GRANT ALL PRIVILEGES ON *.* TO 'newdatabaseuser'@'%' WITH GRANT OPTION;

Now, you need to create databases and grant privileges to the surrogate user for each of them. You do this as follows:

CREATE DATABASE restoreddb1 DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
GRANT ALL ON restoreddb1.* TO 'newdatabaseuser'@'localhost' IDENTIFIED BY 'temporarypassword';

If there are others, then repeat the commands above for each one, replacing restoreddb1 with the name of the databases you are importing and bringing in. Now, time to import that database into the new host:

mysql -u newdatabaseuser -h localhost -p --database=newdatabase < /path/to/backup-databases.sql

Once it finishes, log into the mysql command mode and verify the original databases made it over:

sudo mysql -u user -p
> SHOW DATABASES;
> EXIT

If possibly, run this command on both machines, and the output should be identical. Now, it is time to migrate the website files over to the new host:

sudo scp -r /var/www/website.com/public_html user@newhostorip.com:/var/www/newwebsite.com/

Put the files in the appropriate locations, restart the mysql service and reboot. Lastly, once you verify the original databases made it over and the website is restored and functioning, you can delete the surrogate user and database as follows:

  DROP DATABASE newdatabase;
  DROP USER 'newdatabaseuser'@'localhost';

oemb1905 2019/12/30 02:37

computing/migratewp.txt · Last modified: 2019/12/29 19:37 by oemb1905