Running the migration

Check out the code manually and upgrade your database by calling odoo-bin, (or openerp-server) directly. You will want to do this when you are working on developing migration scripts for uncovered modules.

1. Get the code from OpenUpgrade and dependencies

OpenUpgrade

Make the openupgrade_framework and the openupgrade_scripts modules available in the addons path in the Odoo instance of the new version.

Or, for older versions: check out the OpenUpgrade source code from GitHub for the branches you need. Each branch migrates to its version from the previous version, so branch 13.0 migrates from 12.0 to 13.0. If you are migrating across multiple versions, you need to run each version of OpenUpgrade in order. Skipping versions is not supported.

The OpenUpgrade repository includes both openupgrade_framework and openupgrade_scripts:

https://github.com/OCA/OpenUpgrade

openupgradelib

When installing the openupgradelib make sure you check out the latest version from github to get the latest updates and fixes:
```
pip install git+https://github.com/OCA/openupgradelib.git@master#egg=openupgradelib
```

2. Make a copy of the database to migrate

Decide which database you are going to upgrade. You absolutely must make a backup of your live database before you start this process!

3. Adjust the configuration for Odoo and OpenUpgrade

Edit the configuration files and command line parameters to point to the database you are going to upgrade. The recommended command line parameters are the --upgrade-path=<path_to_openupgrade>/openupgrade_scripts/scripts --update all --stop-after-init --load=base,web,openupgrade_framework flags.

For versions earlier than 14.0 that are running the OpenUpgrade fork rather than Odoo itself, you do not pass the load parameter nor upgrade-path parameters.

Configuration options

When migrating across several versions of Odoo, setting the target version as an environment variable allows OpenUpgrade to skip methods that are called in every version but really only need to run in the target version. Make the target version available to OpenUpgrade with:
```
export OPENUPGRADE_TARGET_VERSION=13.0
```
(when migrating up to 13.0)

Obsolete options in the Odoo configuration file

Versions of OpenUpgrade earlier than 14.0 allow for the following configuration options. Add these options to a separate stanza in the server configuration file under a header [openupgrade]

autoinstall - A dictionary with module name keys and lists of module names as values. If a key module is installed on your database, the modules from the value (and their dependencies) are selected for installation as well.
force_deps - A dictionary with module name keys and lists of module names as values. If a key module is installed on your database, the modules from the value will be treated as a module dependency. With this directive, you can manipulate the order in which the modules are migrated. If the modules from the value are not already installed on your database, they will be selected for installation (as will their dependencies). Be careful not to introduce a circular dependency using this directive.

4. Run the upgrade, fix data and repeat…

Run the upgrade and check for errors. You will probably learn a lot about your data and have to do some manual clean up before and after the upgrade. Expect to repeat the process several times as you encounter errors, clean up your data, and try again. If necessary, ask for help or report bugs on GitHub.

Write the missing migration scripts

At this stage, if some of your modules don’t have yet migration scripts, you might need to add them yourself. Read more about the development of migrations scripts in Migration script development