MySQL

Notes on moving MySQL (it was actually MariaDB on Debian) into a Docker container.

Back up databases

cd /green/BACKUPS/bellman_mysql for db in mysql asterisk owncloud yaris; do mysqldump -u root $db > $db.sql; done

Dockerize

I am using the official mariadb docker, I turned off the database running on the host and did

docker run -d --hostname=db --name=db -p 3306:3306 -v /var/lib/mysql:/var/lib/mysql -e MYSQL_ROOT_PASSWORD='SECRET' mariadb:latest

I named it 'db' and gave it a hostname of 'db'. This allows linking with other databases by name and access from the host via the hostname and I can see it worked with

docker exec -it db mysql -u root -p mysql

select * from db;

I have to allow remote connections to the database so that asterisk can continue to use it.

GRANT SELECT,INSERT,UPDATE,DELETE ON asterisk.* to [email protected];
FLUSH PRIVILEGES;

You have to edit /etc/mysql/debian.cnf and my.cnf to change from connecting via a socket to protocol=tcp. You should be able to connect remotely with

mysql -u asterik -p asterisk

After it's running then you can delete the server package from the host

apt-get remove mysql-server