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Support #828

Updated by Daniel Curtis over 7 years ago

I recently needed to move two database services, PostgreSQL and MariaDB, from a Debian server on a VM to a FreeBSD jail. Since the database server on the VM was the database server for a few web services, I wanted as little downtime as possible. 

 This is a guide on the process by which I migrated the two database services to the new server. 

 h2. Prepare the New Server 

 Start by installing and setting up the two database services in the new server. 

 * Install and setup "PostgreSQL":https://project.altservice.com/issues/606 

 * Install and setup "MariaDB":https://project.altservice.com/issues/788 

 h2. Migrate the Databases 

 * Migrate the local PostgreSQL database to the new remote server: 
 <pre> 
 pg_dumpall pg_dump -C -h localhost remotehost -U postgres remoteuser dbname | psql -h remotedb.example.com localhost -U psql -W localuser dbname 
 </pre> 

 * Migrate the MariaDB database to the new server: 
 <pre> 
 mysqldump --all-databases -uuser -ppassword | mysql -hremoteserver -uremoteuser -premoteserver 
 </pre>  

 h2. Resources 

 * http://dba.stackexchange.com/questions/174/how-can-i-move-a-database-from-one-server-to-another 
 * http://stackoverflow.com/questions/1237725/copying-postgresql-database-to-another-server 
 * http://dba.stackexchange.com/questions/17740/how-to-get-a-working-and-complete-postgresql-db-backup-and-test 
 * http://stackoverflow.com/questions/16618627/pg-dump-vs-pg-dumpall-which-one-to-use-to-database-backups 
 * https://www.postgresql.org/docs/9.0/static/app-pg-dumpall.html

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