documentation/services/pad.libre-service.eu.md

# Service pad.libre-service.eu

Le service pad.libre-service.eu est un service de traitement de texte collaboratif basé sur le logiciel Etherpad-lite : https://etherpad.org/

# Installation 

Basée sur :
- https://github.com/ether/etherpad-lite#manual-install
- https://framacloud.org/fr/cultiver-son-jardin/etherpad


## Prérequis système

Configuration du hostname :
```
hostname pad.libre-service.eu
```

Personnalisation du prompt dans .bashrc :
```
PS1='${debian_chroot:+($debian_chroot)}\u@\H:\w\$ '
```
Ouvrir les ports nécessaires :                              
```
apt install ufw
ufw allow 'ssh'
ufw enable
```

## Prérequis logiciels

### Git 
Installation de Git pour cloner le code :  
```
apt install git
```

### Postgresql

Base de données :
```
apt install postgresql postgresql-contrib
```

D'après la documentation d'installation de Gitea :

>    PostgreSQL uses md5 challenge-response encryption scheme for password authentication by default.
>    Nowadays this scheme is not considered secure anymore. Use SCRAM-SHA-256 scheme instead by editing
>    the postgresql.conf configuration file on the database server to:
>    
>    password_encryption = scram-sha-256
>    
>    Restart PostgreSQL to apply the setting.

Le conseil semble judicieux donc éditer le fichier `/etc/postgresql/13/main/postgresql.conf` :

```
#password_encryption = md5              # md5 or scram-sha-256
password_encryption = scram-sha-256
```

Et redémarrer le service :

```
systemctl restart postgresql.service
```


### Nodejs

Etherpad nécessite Node.js >= 12.17.0. Vérifier que la version de Debian Stable est compatible :
```
apt-cache show nodejs |grep Version
```

Installer :
```
apt install nodejs
```

## Déploiement

### Préparation de la base de données

Créer un utilisateur (« role » en langage Pgsql) :

```
su -c "psql" - postgres
CREATE ROLE etherpad WITH LOGIN PASSWORD 'xxxxxxxxxxxxx';
```

Créer une base de données :
```
CREATE DATABASE etherpad WITH OWNER etherpad TEMPLATE template0 ENCODING UTF8 LC_COLLATE 'fr_FR.UTF-8' LC_CTYPE 'fr_FR.UTF-8';
```

Donner l'accès en éditant le ficher /etc/postgresql/13/main/pg_hba.conf :
```
local    etherpad    etherpad    scram-sha-256
```

Redémarrer le service :
```
systemctl restart postgresql.service
```

### Création d'un utilisateur système dédié

Créer un compte système dédié :
```
adduser --disabled-password --system --group --home /srv/etherpad/
```

###  Déploiement du code

Déployer le code :
```
cd /var/www
git clone --branch master git://github.com/ether/etherpad-lite.git pad.libre-service.eu
chown -R etherpad:etherpad /var/www/pad.libre-service.eu
```

Premier lancement :
```
su etherpad -c "cd /var/www/pad.libre-service.eu/ && ./bin/installDeps.sh && ./src/bin/run.sh"
```


Configuration dans le fichier `/var/www/pad.libre-service.eu/settings.json` :
```
- "dbType" : "dirty",
- "dbSettings" : {
-                   "filename" : "var/dirty.db"
-                 },

  "dbType" : "postgres",
  "dbSettings" : {
    "user":     "etherpad",
    "host":     "localhost",
    "port":     3306,
    "password": "password",
    "database": "etherpad",
    "charset":  "utf8mb4"
  },

  "trustProxy": true,

Define a password for the admin user:Advertisement

  "users": {
    "admin": {
      "password": "adminpassword",
      "is_admin": true
    },
```


Installer les dépendances nécessaires :
```
su etherpad -c "cd /var/www/pad.libre-service.eu/ && ./bin/installDeps.sh"
```


## Configuration Systemd

Créer le fichier `/etc/systemd/system/etherpad.service` :
```
[Unit]
Description=Etherpad-lite, the collaborative editor.
After=syslog.target network.target

[Service]
Type=simple
User=etherpad
Group=etherpad
WorkingDirectory=/var/www/pad.libre-service.eu/
Environment=NODE_ENV=production

ExecStart=/usr/bin/node /var/www/pad.libre-service.eu/bin/run.sh
# src???/node/server.js

Restart=always

[Install]
WantedBy=multi-user.target
```

Activer le fichier :
```
systemctl daemon-reload
```


Next, start the Etherpad service and enable it to start at system reboot with the following command:
```
systemctl start etherpad
systemctl status etherpad
```

Activer le démarrage automatique :
```
systemctl enable etherpad
```

## Configuration Apache

Documentation officielle : https://github.com/ether/etherpad-lite/wiki/How-to-put-Etherpad-Lite-behind-a-reverse-Proxy#apache

Activer les modules pour le proxy :
```
a2enmod proxy
a2enmod proxy_http
a2enmod rewrite
apachectl configtest
systemctl restart apache2
```

Configurer le site web :
```
        ProxyVia On
        ProxyRequests Off
        ProxyPreserveHost On

        <Location />
                  ProxyPass http://localhost:9001/ retry=0 timeout=30
                  ProxyPassReverse http://localhost:9001/
        </Location>
        <Location /socket.io>
                  # This is needed to handle the websocket transport through the proxy, since                                                                                                                                                       
                  # etherpad does not use a specific sub-folder, such as /ws/ to handle this kind of traffic.                                                                                                                                       
                  # Taken from https://github.com/ether/etherpad-lite/issues/2318#issuecomment-63548542                                                                                                                                             
                  # Thanks to beaugunderson for the semantics                                                                                                                                                                                       
                  RewriteEngine On
                  RewriteCond %{QUERY_STRING} transport=websocket    [NC]
                  RewriteRule /(.*) ws://localhost:9001/socket.io/$1 [P,L]
                  ProxyPass http://localhost:9001/socket.io retry=0 timeout=30
                  ProxyPassReverse http://localhost:9001/socket.io
        </Location>

        <Proxy *>
               Options FollowSymLinks MultiViews
               AllowOverride All
               Order allow,deny
               allow from all
        </Proxy>
```


## Personnalisation

### Installation de modules

Installer des modules élémentaires :
```
su - etherpad
cd /var/www/pad.libre-service.eu/
npm install --no-save --legacy-peer-deps ep_adminpads2 ep_align ep_author_hover ep_delete_empty_pads ep_font_color ep_font_size ep_headings2 ep_spellcheck ep_table_of_contents
```

Sous réserve de mise àjour : ep_delete_after_delay

### Ajout export ODF

La FAQ officielle indique comment faire : https://github.com/ether/etherpad-lite/wiki/How-to-enable-importing-and-exporting-different-file-formats-with-AbiWord

Installer LibreOffice de façon non grahique :
```
apt install libreoffice-nogui
```

Configurer dans /var/www/pad.libre-service.eu/settings.json : 
```
"soffice" : "/usr/bin/soffice"
```


# Mise à jour
Documentation:
```
To update to the latest released version, execute git pull origin. The next start with src/bin/run.sh will update the dependencies.
```

So proceed: 
```
systemctl stop etherpad
cd /var/www/pad.libre-service.eu/
git pull
./src/bin/run.sh
????????
systemctl start etherpad
```