icinga2/doc/17-upgrading-icinga-2.md

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# <a id="upgrading-icinga-2"></a> Upgrading Icinga 2
Upgrading Icinga 2 is usually quite straightforward. Ordinarily the only manual steps involved
are scheme updates for the IDO database.
## <a id="upgrading-mysql-db"></a> Upgrading the MySQL database
If you're upgrading an existing Icinga 2 instance you should check the
`/usr/share/icinga2-ido-mysql/schema/upgrade` directory for an incremental schema upgrade file.
> **Note**
>
> If there isn't an upgrade file for your current version available there's nothing to do.
Apply all database schema upgrade files incrementally.
# mysql -u root -p icinga < /usr/share/icinga2-ido-mysql/schema/upgrade/<version>.sql
The Icinga 2 DB IDO module will check for the required database schema version on startup
and generate an error message if not satisfied.
**Example:** You are upgrading Icinga 2 from version `2.0.2` to `2.3.0`. Look into
the *upgrade* directory:
$ ls /usr/share/icinga2-ido-mysql/schema/upgrade/
2.0.2.sql 2.1.0.sql 2.2.0.sql 2.3.0.sql
There are two new upgrade files called `2.1.0.sql`, `2.2.0.sql` and `2.3.0.sql`
which must be applied incrementally to your IDO database.
## <a id="upgrading-postgresql-db"></a> Upgrading the PostgreSQL database
If you're updating an existing Icinga 2 instance you should check the
`/usr/share/icinga2-ido-pgsql/schema/upgrade` directory for an incremental schema upgrade file.
> **Note**
>
> If there isn't an upgrade file for your current version available there's nothing to do.
Apply all database schema upgrade files incrementally.
# export PGPASSWORD=icinga
# psql -U icinga -d icinga < /usr/share/icinga2-ido-pgsql/schema/upgrade/<version>.sql
The Icinga 2 DB IDO module will check for the required database schema version on startup
and generate an error message if not satisfied.
**Example:** You are upgrading Icinga 2 from version `2.0.2` to `2.3.0`. Look into
the *upgrade* directory:
$ ls /usr/share/icinga2-ido-pgsql/schema/upgrade/
2.0.2.sql 2.1.0.sql 2.2.0.sql 2.3.0.sql
There are two new upgrade files called `2.1.0.sql`, `2.2.0.sql` and `2.3.0.sql`
which must be applied incrementally to your IDO database.