Migration of Gerrit Server Old to New

In this tutorial, we will be migrating our gerrit 2.13 to a new server running gerrit 2.15

Prerequisites

To complete this tutorial, you'll need the following 2 nodes

• Database node

• New gerrit node

Environment

Old gerrit

Server Information

OS	MYSQL	MYSQL version	Gerrit version	Authentication
Ubuntu 14.04	On Localhost		2.13	LDAP

New gerrit

Server Information

OS	MYSQL	MYSQL version	Gerrit version	Authentication
Debian 9 (Stretch)	On remonte host		2.15	LDAP

MYSQL node

Server Information

OS	MYSQL	MYSQL version
Ubuntu 16.04	server version

STEP 1 On old gerrit node

Stop gerrit

Login to your gerrit server with the gerrit user or the user running gerrit. Navigate to /gerrit/bin and run

sudo ./gerrit.sh stop

Backup gerrit database

Login to your old gerrit node and backup your gerrit data base. In this case the database name is reviewdb. I use mysqldump to backup the database to a file.

mysqldum -u gerrit -p database  reviewdb > reviewdb_backup.sql

If prompt, enter you mysql password. This will backup your database reviewdb to a file called reviewdb_backup.sql

STEP 2: On the MYSQL server

I am going to convert the installation for a MYSQL server in this tutorial. I assume, you have already MYSQL server running on your node. login to mysql and create the database reviewdb and the user gerrit, grant all privileges to gerrit user.

STEP 3: On new gerrit node

Installation

Make sure that you have Ubuntu 16.04 installed on you new gerrit node.