# Discourse

## Prepare Your Settings

In your auth project's settings file, do the following:

- Add `'allianceauth.services.modules.discourse',` to your `INSTALLED_APPS` list
- Append the following to your local.py settings file:

```python
# Discourse Configuration
DISCOURSE_URL = ''
DISCOURSE_API_USERNAME = ''
DISCOURSE_API_KEY = ''
DISCOURSE_SSO_SECRET = ''
```

## Install Docker

    wget -qO- https://get.docker.io/ | sh

## Install Discourse

### Download Discourse

    mkdir /var/discourse
    git clone https://github.com/discourse/discourse_docker.git /var/discourse

### Configure

    cd /var/discourse
    cp samples/standalone.yml containers/app.yml
    nano containers/app.yml

Change the following:

- `DISCOURSE_DEVELOPER_EMAILS` should be a list of admin account email addresses separated by commas.
- `DISCOUSE_HOSTNAME` should be `discourse.example.com` or something similar.
- Everything with `SMTP` depends on your mail settings. [There are plenty of free email services online recommended by Discourse](https://github.com/discourse/discourse/blob/master/docs/INSTALL-email.md#recommended-email-providers-for-discourse) if you haven't set one up for auth already.

To install behind Apache/Nginx, look for this section:

    ...
    ## which TCP/IP ports should this container expose?
    expose:
      - "80:80"   # fwd host port 80   to container port 80 (http)
    ...

Change it to this:

    ...
    ## which TCP/IP ports should this container expose?
    expose:
      - "7890:80"   # fwd host port 7890   to container port 80 (http)
    ...

Or any other port will do, if taken. Remember this number.

### Build and launch

    nano /etc/default/docker

Uncomment this line:

    DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4"

Restart Docker:

    service docker restart

Now build:

    ./launcher bootstrap app
    ./launcher start app

## Web Server Configuration

You will need to configure your web server to proxy requests to Discourse.

A minimal Apache config might look like:

    <VirtualHost *:80>
        ServerName discourse.example.com
        ProxyPass / http://0.0.0.0:7890/
        ProxyPassReverse / http://0.0.0.0:7890/
    </VirtualHost>

A minimal Nginx config might look like:

    server {
        listen 80;
        server_name discourse.example.com;
        location / {
            include proxy_params;
            proxy_pass http://127.0.0.1:7890;
        }
    }

## Configure API

### Generate admin account

From the `/var/discourse` directory,

    ./launcher enter app
    rake admin:create

Follow prompts, being sure to answer `y` when asked to allow admin privileges.

### Create API key

Navigate to `discourse.example.com` and log on. Top right press the 3 lines and select `Admin`. Go to API tab and press `Generate Master API Key`.

Add the following values to your auth project's settings file:

- `DISCOURSE_URL`: `https://discourse.example.com` (do not add a trailing slash!)
- `DISCOURSE_API_USERNAME`: the username of the admin account you generated the API key with
- `DISCOURSE_API_KEY`: the key you just generated

### Configure SSO

Navigate to `discourse.example.com` and log in. Back to the admin site, scroll down to find SSO settings and set the following:

- `enable_sso`: True
- `sso_url`: `http://example.com/discourse/sso`
- `sso_secret`: some secure key

Save, now set `DISCOURSE_SSO_SECRET` in your auth project's settings file to the secure key you just put in Discourse.

Finally run migrations and restart Gunicorn and Celery.
