Question
How to setup multiple MySQL in Droplet?
- Posted on May 15, 2020
- DigitalOcean Managed MySQL Database
Asked by Martin Heinrich
Hi,
I try to install a MySQL 8 multiple instances in my Ubuntu 18.x droplet.
I configured my.cnf (mysqld groups) , made a second /var/run/mysqld2.pin and mysqld2.sock, created a new datadir (/var/lib/mysql2 inkl. user und usergroup mysql and chmod 777) und try to start the instances.
mysqld_multi start 1
ok.
And then I try to start the second instance
mysqld_multi start 2
and I always will get the FATAL ERROR “Tried to start mysqld under group [mysqld2], but no data directory was found or could be created. data directory used: /var/lib/mysql2”
and I don’t know why!!!
Be aware - it’s MySQL 8 and mysql_install_db to install the mysql databases is deprecated! Instead I should use mysqld --initialize but it won’t work as well.
Please help!
BR Martin
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Hi guys, thx a lot. I will try and wanna give feedback
Hi there @mheinrich67,
I believe that you need to prepare your data directory for the second instance.
You can follow the steps here on how to prepare multiple data directories for MySQL 8:
https://dev.mysql.com/doc/refman/8.0/en/multiple-data-directories.html
Regards, Bobby