**Elixir 1.12 and Erlang OTP 22 are now required**. If your distribution or the repositories from Erlang Solutions don't provide these versions, you need to uninstall the current versions and install [Elixir](https://github.com/asdf-vm/asdf-elixir) through the [ASDF tool](https://asdf-vm.com/).
Mobilizon 2.0 uses data based on [timezone-boundary-builder](https://github.com/evansiroky/timezone-boundary-builder) (which is based itself on OpenStreetMap data) to determine the timezone of an event automatically, based on it's geocoordinates. However, this needs ~700Mio of disk, so we don't redistribute data directly, depending on the case. It's possible to skip this part, but users will need to manually pick the timezone for every event they created when it has a different timezone from their own.
### Docker install
The geographic timezone data is already bundled into the image, you have nothing to do.
### Release install
In order to keep the release tarballs light, the geographic timezone data is not bundled directly. You need to download the data:
* either raw from Github, but **requires an extra ~1Gio of memory** to process the data
These are optional, installing them will allow Mobilizon to export to PDF and ODS as well. Mobilizon 2.0 allows to export the participant list, but more is planned.
Both can be installed through pip. You need to enable and configure exports for PDF and ODS in the configuration afterwards. Read [the dedicated docs page about this](https://docs.joinmobilizon.org/administration/configure/exports/).
The 1.1 version of Mobilizon brings Elixir releases support. An Elixir release is a self-contained directory that contains all of Mobilizon's code (front-end and backend), it's dependencies, as well as the Erlang Virtual Machine and runtime (only the parts you need). As long as the release has been assembled on the same OS and architecture, it can be deploy and run straight away. [Read more about releases](https://elixir-lang.org/getting-started/mix-otp/config-and-releases.html#releases).
If you want to migrate to releases, [we provide a full guide](https://docs.joinmobilizon.org/administration/upgrading/source_to_release/). You may do this at any time.
To stay on a source release, you just need to check the following things:
* Rename your configuration file `config/prod.secret.exs` to `config/runtime.exs`.
* If your config file includes `server: true` under `Mobilizon.Web.Endpoint`, remove it.
```diff
config :mobilizon, Mobilizon.Web.Endpoint,
- server: true,
```
* The uploads default directory is now `/var/lib/mobilizon/uploads`. To keep it in the previous `uploads/` directory, just add the following line to `config/runtime.exs`:
Or you may use any other directory where the `mobilizon` user has write permissions.
* The GeoIP database default directory is now `/var/lib/mobilizon/geo/GeoLite2-City.mmdb`. To keep it in the previous `priv/data/GeoLite2-City.mmdb` directory, just add the following line to `config/runtime.exs`:
```elixir
config :geolix, databases: [
%{
id: :city,
adapter: Geolix.Adapter.MMDB2,
source: "priv/data/GeoLite2-City.mmdb"
}
]
```
Or you may use any other directory where the `mobilizon` user has read permissions.