debianize-mobilizon/UPGRADE.md

# Upgrading from 2.0 to 2.1

## Distro-specific packages

Elixir releases are precompiled binaries and are therefore dependent on the host they've been compiled to be compatible with your system (architecture, libc version, …) ([read more](https://hexdocs.pm/mix/Mix.Tasks.Release.html#module-requirements)). For instance, the release build on Debian Bullseye (with libc 2.31) cannot be run on Debian Buster (which only provides libc 2.28). Another example is Red Hat-relative distributions (Fedora, CentOS, …) which have an OpenSSL library version that's not compatible with the version compiled (because of [potential patent issues with Elliptic curves](https://github.com/kerl/kerl#compiling-crypto-on-red-hat-systems)).

In order to make sure the releases package we redistribute , we now build distro-version-specific packages.
The list of packages built for version 2.1.0 with the amd64 (x86_64) architecture is the following:
  - Debian Buster (10)
  - Debian Bullseye (11)
  - Ubuntu Bionic (18.04)
  - Ubuntu Focal (20.04)
  - Fedora 35
  - Fedora 36
  - Alpine 3.14.5
  - Alpine 3.15.3

As building for non-`amd64` architectures is quite difficult (because of the time and extra resources cross-compiling takes), these architectures are only built against Debian Bullseye (11) at the moment.

We want to expand this list in the future to make sure it covers most uses, so feel free to give us feedback from what you need.

Note: Docker images are also built for `amd64`/`arm`/`arm64` architectures, and of course you can always install Mobilizon from source on pretty much any unix-compatible system.

## Mailer library change

### Docker

The change is already applied. You may remove the `MOBILIZON_SMTP_HOSTNAME` environment key which is not used anymore.

### Release and source mode

In your configuration file under `config :mobilizon, Mobilizon.Web.Email.Mailer`,
* Change `Bamboo.SMTPAdapter` to `Swoosh.Adapters.SMTP`,
* rename the `server` key to `relay`
* remove the `hostname` key,
* the default value of the username and password fields is an empty string and no longer `nil`.

```diff
 config :mobilizon, Mobilizon.Web.Email.Mailer,
-   adapter: Bamboo.SMTPAdapter,
+   adapter: Swoosh.Adapters.SMTP,
-   server: "localhost",
+   relay: "localhost",
-   hostname: "localhost",
   # usually 25, 465 or 587
   port: 25,
-   username: nil,
+   username: "",
-   password: nil,
+   password: "",
   # can be `:always` or `:never`
   tls: :if_available,
   allowed_tls_versions: [:tlsv1, :"tlsv1.1", :"tlsv1.2"],
   retries: 1,
   # can be `true`
   no_mx_lookups: false,
   # can be `:always`. If your smtp relay requires authentication set it to `:always`.
   auth: :if_available
```

# Upgrading from 1.3 to 2.0

Requirements dependencies depend on the way Mobilizon is installed.
## New Elixir version requirement
### Docker and Release install

You are already using latest Elixir version in the release tarball and Docker images.

### Source install

**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/).

## Geographic timezone data

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

  ```sh
  sudo -u mobilizon mkdir /var/lib/mobilizon/timezones
  sudo -u mobilizon ./bin/mobilizon_ctl tz_world.update
  ```

* either already processed from our own distribution server

  ```sh
  sudo -u mobilizon mkdir /var/lib/mobilizon/timezones
  sudo -u mobilizon curl -L 'https://packages.joinmobilizon.org/tz_world/timezones-geodata.dets' -o /var/lib/mobilizon/timezones/timezones-geodata.dets
  ```

In both cases, ~700Mio of disk will be used. You may use the following configuration to specify where the data is expected if you decide to change it from the default location (`/var/lib/mobilizon/timezones`) :
```elixir
config :tz_world, data_dir: "/some/place"
```

### Source install

You need to download the data :
* either raw from Github, but **requires an extra ~1Gio of memory** to process the data

  ```sh
  sudo -u mobilizon mkdir /var/lib/mobilizon/timezones
  sudo -u mobilizon mix mobilizon.tz_world.update
  ```

* either already processed from our own distribution server

  ```sh
  sudo -u mobilizon mkdir /var/lib/mobilizon/timezones
  sudo -u mobilizon curl -L 'https://packages.joinmobilizon.org/tz_world/timezones-geodata.dets' -o /var/lib/mobilizon/timezones/timezones-geodata.dets
  ```

In both cases, ~700Mio of disk will be used. You may use the following configuration to specify where the data is expected:
```elixir
config :tz_world, data_dir: "/some/place"
```

## Exports folder

Create the folder for default CSV export:

```sh
sudo -u mobilizon mkdir -p /var/lib/mobilizon/uploads/exports/csv
```

This path can be configured, see [the dedicated docs page about this](https://docs.joinmobilizon.org/administration/configure/exports/).
Files in this folder are temporary and are cleaned once an hour.

## New optional dependencies

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.
### Docker
Everything is included in our Docker image.
### Release and source install

New optional Python dependencies:
* `Python` >= 3.6
* `weasyprint` for PDF export (with [a few extra dependencies](https://doc.courtbouillon.org/weasyprint/stable/first_steps.html))
* `pyexcel-ods3` for ODS export (no extra dependencies)

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/).

# Upgrading from 1.0 to 1.1

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).

## Comparison
Migrating to releases means:
* You only get a precompiled binary, so you avoid compilation times when updating
* No need to have Elixir/NodeJS installed on the system
* Code/data/config location is more common (/opt, /var/lib, /etc)
* More efficient, as only what you need from the Elixir/Erlang standard libraries is included and all of the code is directly preloaded
* You can't hardcode modifications in Mobilizon's code

Staying on source releases means:
* You need to recompile everything with each update
* Compiling frontend and backend has higher system requirements than just running Mobilizon
* You can change things in Mobilizon's code and recompile right away to test changes

## 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.

## Source install
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`:
  ```elixir
  config :mobilizon, Mobilizon.Web.Upload.Uploader.Local, uploads: "uploads"
  ```
  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.