====== Install Jitsi on CentOS 7 ======

This page gives the needed steps to install and configure Jitsi on a CentOS server. If like me, you're not a big Docker fan, and you're happier with EL based systems, it might be useful to you. In this guide, you'll learn :
  * How to build latest versions of all components
  * Get a working install with prosody, jicofo, meet, videobridge
  * Configure jigasi and integrate it with an Asterisk/FreePBX server to have both inbound and outbound phone call from a Jitsi conference
  * Integrate Etherpad

<note tip>We deploy all this with ansible, see [[https://git.fws.fr/fws/ansible-roles/src/branch/master/roles/prosody|prosody]] [[https://git.fws.fr/fws/ansible-roles/src/branch/master/roles/jitsi|jitsi]] and [[https://git.fws.fr/fws/ansible-roles/src/branch/master/roles/jitsi_videobridge|jitsi videobridge]]
This page are just some notes to help you setting this up if you don't want to play with ansible. But ansible is our recommanded way to deploy it
</note>

Jitsi is composed of several components, and also relies on 3rd party ones. Here is a quick overview of which are using for what :

  * An XMPP server is needed to route messages between all the components. We will use prosody for this
  * Videobridge is the SFU((Selective Forwarding Unit)). It will receive all the video and audio streams, and handle relay to the other participants
  * Jicofo is the component which will handle stream negociation and room management
  * Meet is the user interface of Jitsi. It's also available as an mobile app and an Electron desktop app (but here we'll install the web interface only)
  * Jigasi is a SIP gateway. It can register on a SIP server and bridge phones and Jitsi rooms. Both outbound (call phone numbers from Jitsi) and inbound (join Jitsi rooms from a phone) are possible
  * ConferenceMapper API is a small daemon needed for inbound calls to work. It'll associate a PIN to each Jitsi room and is needed so that a phone call can be routed to the correct Jitsi room

In this example, we will use visio.fws.fr as jitsi domain name. You'll need to adapt this

<note tip>This how to assume you already have a valid SSL cert in /etc/prosody/certs/jitsi.crt with its private key /etc/prosody/certs/jitsi.key.</note>

===== Enable EPEL repo =====
If not already done
<code bash>
yum install epel-release
</code>

===== Install prosody =====

Prosody is available in EPEL, so we can install it easily

<code bash>
mkdir -p /opt/prosody/modules
yum install prosody lua-ldap lua-cyrussasl
</code>

Jitsi can also use some 3rd party prosody modules

<code bash>
for MOD in ext_events.lib.lua \
           util.lib.lua \
           mod_speakerstats.lua \
           mod_speakerstats_component.lua \
           mod_turncredentials.lua \
           mod_conference_duration.lua \
           mod_conference_duration_component.lua; do
  wget -P /opt/prosody/modules \
    https://raw.githubusercontent.com/jitsi/jitsi-meet/master/resources/prosody-plugins/$MOD
done
wget -P /opt/prosody/modules \
  https://raw.githubusercontent.com/prosody-modules/mod_auth_ldap/master/mod_auth_ldap.lua
</code>

Now, lets configure it. Edit /etc/prosody/prosody.cfg.lua

<file prosody.cfg.lua lua>

plugin_paths = { "/opt/prosody/modules" }

admins = {
}
modules_enabled = {
  "roster";
  "saslauth";   
  "tls";
  "dialback";   
  "disco";
  "carbons";
  "pep";
  "private";
  "blocklist";  
  "vcard4";
  "vcard_legacy";
  "version";
  "uptime";
  "time";
  "ping";
  "register";   
  "admin_adhoc";
  "bosh";
  "pubsub";
}
modules_disabled = {
}

allow_registration = false
c2s_require_encryption = true
s2s_require_encryption = true
s2s_secure_auth = false

c2s_ports = {   
  5222,
}
s2s_port = {
  5269,
}
http_port = {   
  5280,
}
component_ports = {
  5347,
}
component_interface = "0.0.0.0"

authentication = "internal_hashed"

log = {
  info = "*syslog";
  error = "*syslog";
}

certificates = "/etc/pki/prosody/";
pidfile = "/run/prosody/prosody.pid";
daemonize = false;

VirtualHost "localhost"

Include "conf.d/*.cfg.lua"
</file>

Now edit **/etc/prosody/conf.d/jitsi.cfg.lua**

<file jitsi.cfg.lua lua>
muc_mapper_domain_base = "visio.fws.fr";
admins = { "focus@auth.visio.fws.fr" }
http_default_host = "visio.fws.fr"

-- If you have a turn server, you can configure it here
-- turncredentials_secret = "TURN_SECRET";
-- turncredentials = {
--   {
--     type = "turns",
--     host = "turn.example.net",
--     port = "3478",
--     transport = "udp"
--   }
-- };

cross_domain_bosh = false;
cross_domain_websocket = true;
consider_bosh_secure = true;

VirtualHost "visio.fws.fr"
  authentication = "anonymous"
  ssl = {
    key = "/etc/prosody/certs/jitsi.key";
    certificate = "/etc/prosody/certs/jitsi.crt";
  }

  modules_enabled = {
    "bosh";
    "pubsub";   
    "ping";
    "websocket";
    "turncredentials";
    "speakerstats";
    "conference_duration";
  }
  c2s_require_encryption = false
  allow_unencrypted_plain_auth = true
  speakerstats_component = "speakerstats.visio.fws.fr"
  conference_duration_component = "conferenceduration.visio.fws.fr"


VirtualHost "auth.visio.fws.fr"
  ssl = {
    key = "/etc/prosody/certs/jitsi.key";
    certificate = "/etc/prosody/certs/jitsi.crt";
  }
  authentication = "internal_hashed"
  c2s_require_encryption = false

Component "conference.visio.fws.fr" "muc"
  storage = "memory"
  modules_enabled = { "ping"; }
  muc_room_locking = false
  muc_room_default_public_jids = true

Component "internal.auth.visio.fws.fr" "muc"
  storage = "memory"
  modules_enabled = { "ping"; }
  muc_room_cache_size = 1000

Component "focus.visio.fws.fr"
  component_secret = FOCUS_COMPONENT_SECRET"

Component "speakerstats.visio.fws.fr" "speakerstats_component"
  muc_component = "conference.visio.fws.fr"

Component "conferenceduration.visio.fws.fr" "conference_duration_component"
  muc_component = "conference.visio.fws.fr"

</file>

Now we can start and enable the daemon

<code bash>
systemctl enable --now prosody
</code>

And we have to create some xmpp user accounts which will be used by Jitsi (adapt the passwords of course)

<code bash>
prosodyctl register jvb auth.visio.fws.fr JVB_XMPP_PASS
prosodyctl register focus auth.visio.fws.fr FOCUS_XMPP_PASS
prosodyctl register jigasi auth.visio.fws.fr JIGASI_XMPP_PASS
</code>

===== Install a recent maven =====
Maven is available with yum, but its version is too old to build videobridge. So we'll install a newer one
<code bash>
yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel
</code>
<code bash>
mkdir -p /opt/maven/apache-maven/
wget https://miroir.univ-lorraine.fr/apache/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz
tar xvzf apache-maven-3.6.3-bin.tar.gz
rsync -rvP --del apache-maven-3.6.3/ /opt/maven/apache-maven/
rm -rf apache-maven-3.6.3-bin.tar.gz apache-maven-3.6.3/

cat <<_EOF > /etc/profile.d/maven.sh
#!/bin/sh

export JAVA_HOME=/usr/lib/jvm/jre-openjdk
export M2_HOME=/opt/maven/apache-maven
export MAVEN_HOME=/opt/maven/apache-maven
export PATH=${M2_HOME}/bin:${PATH}

_EOF
chmod +x /etc/profile.d/maven.sh
exec bash
</code>

===== Create a jitsi user =====

<code bash>
useradd -d /opt/jitsi jitsi
</code>

===== Install Videobridge =====
<code bash>
yum install git
</code>

<code bash>
mkdir /opt/jitsi/{src,videobridge}
cd /opt/jitsi/src
git clone https://github.com/jitsi/jitsi-videobridge.git
cd jitsi-videobridge
/opt/maven/apache-maven/bin/mvn package -DskipTests -Dassembly.skipAssembly=false
</code>

<code bash>
unzip target/jitsi-videobridge-2.1-SNAPSHOT-archive.zip -d /tmp/
rsync -rvP --del /tmp/jitsi-videobridge-2.1-SNAPSHOT/ /opt/jitsi/videobridge/
rm -rf /tmp/jitsi-videobridge-2.1-SNAPSHOT/
</code>

Now we have to configure videobridge

<code bash>
mkdir -p /opt/jitsi/etc/videobridge
cat <<_EOF > /opt/jitsi/etc/videobridge/videobridge.conf
JVB_OPTS="--apis=rest"
JAVA_SYS_PROPS="-Dnet.java.sip.communicator.SC_HOME_DIR_LOCATION=/opt/jitsi/etc -Dnet.java.sip.communicator.SC_HOME_DIR_NAME=videobridge"
_EOF

cat <<_EOF > /opt/jitsi/etc/videobridge/sip-communicator.properties
org.jitsi.impl.neomedia.transform.srtp.SRTPCryptoContext.checkReplay=false
org.jitsi.videobridge.SINGLE_PORT_HARVESTER_PORT=10000
org.jitsi.videobridge.TCP_HARVESTER_PORT=4443
org.jitsi.videobridge.DISABLE_TCP_HARVESTER=false
org.ice4j.ipv6.DISABLED=true
# If behind NAT, set your private, and public IP here
# org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS=10.99.2.19
# org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS=10.11.12.13

org.jitsi.videobridge.ENABLE_STATISTICS=true
org.jitsi.videobridge.STATISTICS_TRANSPORT=muc
org.jitsi.videobridge.STATISTICS_INTERVAL=5000

org.jitsi.videobridge.xmpp.user.acc1.HOSTNAME=jitsi.fws.fr
org.jitsi.videobridge.xmpp.user.acc1.DOMAIN=auth.visio.fws.fr
org.jitsi.videobridge.xmpp.user.acc1.USERNAME=jvb
org.jitsi.videobridge.xmpp.user.acc1.PASSWORD=JVB_PASSWORD
org.jitsi.videobridge.xmpp.user.acc1.MUC_JIDS=JvbBrewery@internal.auth.visio.fws.fr
# This is just a nickname for the videobridge.
# If you run several videobridge instances, make sure each one uses a unique name
org.jitsi.videobridge.xmpp.user.acc1.MUC_NICKNAME=jitsi.fws.fr

_EOF
</code>

Now we'll create a systemd unit for the videobridge service
<code bash>
mkdir -p /etc/systemd/system
cat <<_EOF > /etc/systemd/system/jitsi-videobridge.service
[Unit]
Description=Jitsi Videobridge
After=network.target

[Service]
Type=simple
SuccessExitStatus=143
EnvironmentFile=/opt/jitsi/etc/videobridge/videobridge.conf
User=jitsi
Group=jitsi
PrivateTmp=true
PrivateDevices=true
ProtectHome=true
ProtectSystem=full
ReadOnlyDirectories=/opt/jitsi/etc /opt/jitsi/videobridge
Restart=on-failure
StartLimitInterval=0
RestartSec=30
# more threads for this process
TasksMax=65000
# allow more open files for this process
LimitNPROC=65000
LimitNOFILE=65000
ExecStart=/opt/jitsi/videobridge/jvb.sh ${JVB_OPTS}

[Install]
WantedBy=multi-user.target

_EOF
systemctl daemon-reload
systemctl enable --now jitsi-videobridge
</code>

<note tip>You have to open ports TCP/4443 and UDP/10000. Those ports must be reachable by participants when they join a room. Unless you use a TURN server</note>

===== Install Jicofo =====

<code bash>
cd /opt/jitsi/src
git clone https://github.com/jitsi/jicofo.git
cd jicofo
/opt/maven/apache-maven/bin/mvn package -DskipTests -Dassembly.skipAssembly=false
unzip target/jicofo-1.1-SNAPSHOT-archive.zip -d /tmp
mkdir -p /opt/jitsi/jicofo
rsync -rvP --del /tmp/jicofo-1.1-SNAPSHOT/ /opt/jitsi/jicofo/
</code>

Now that jicofo is installed, it must be configured
<code bash>
mkdir -p /opt/jitsi/etc/jicofo
cat <<_EOF > /opt/jitsi/etc/jicofo/jicofo.conf
JICOFO_HOST=jitsi.fws.fr
JICOFO_DOMAIN=visio.fws.fr
JICOFO_USER=focus
JICOFO_USERDOMAIN=auth.visio.fws.fr
JICOFO_SECRET='FOCUS_COMPONENT_SECRET'
JICOFO_USER_PASS='FOCUS_XMPP_PASS'
JICOFO_OPTS=''
JAVA_SYS_PROPS="-Dnet.java.sip.communicator.SC_HOME_DIR_LOCATION=/opt/jitsi/etc -Dnet.java.sip.communicator.SC_HOME_DIR_NAME=jicofo"
_EOF

cat <<_EOF > /opt/jitsi/etc/jicofo/sip-communicator.properties
org.jitsi.jicofo.BRIDGE_MUC=JvbBrewery@internal.auth.visio.fws.fr
# Comment this line if you do not intend to use Jigasi
org.jitsi.jicofo.jigasi.BREWERY=JigasiBrewery@internal.auth.visio.fws.fr
_EOF
</code>

Now we can create a systemd unit and start jicofo
<code bash>
cat <<_EOF > /etc/systemd/system/jitsi-jicofo.service
[Unit]
Description=Jitsi Conference Focus
After=network.target

[Service]
Type=simple
SuccessExitStatus=143
EnvironmentFile=/opt/jitsi/etc/jicofo/jicofo.conf
User=jitsi
Group=jitsi
PrivateTmp=true
PrivateDevices=true
ProtectHome=true
ProtectSystem=full
ReadOnlyDirectories=/opt/jitsi/etc /opt/jitsi/jicofo
Restart=on-failure
StartLimitInterval=0
RestartSec=30
ExecStart=/opt/jitsi/jicofo/jicofo.sh \
            --host=${JICOFO_HOST} \
            --domain=${JICOFO_DOMAIN} \
            --secret=${JICOFO_SECRET} \
            --user_domain=${JICOFO_USERDOMAIN} \
            --user_name=${JICOFO_USER} \
            --user_password=${JICOFO_USER_PASS} \
            ${JICOFO_OPT}

[Install]
WantedBy=multi-user.target

_EOF
systemctl daemon-reload
systemctl enable --now jitsi-jicofo
</code>

You should check your logs now to be sure jicofo discover your videobridge.

===== Install Meet =====

It's time to install the Meet interface now.

<code bash>
cat <<_EOF > /etc/yum.repos.d/nodejs.repo
[nodejs]
baseurl = https://rpm.nodesource.com/pub_12.x/el/7/$basearch
gpgcheck = 1
gpgkey = https://rpm.nodesource.com/pub/el/NODESOURCE-GPG-SIGNING-KEY-EL
name = Node.js Packages for Enterprise Linux
_EOF
yum install nodejs
</code>

<code bash>
cd /opt/jitsi/src/
git clone https://github.com/jitsi/jitsi-meet.git
cd jitsi-meet
npm i
make
</code>

This should build Jitsi Meet. We now can put it somewhere to be served by a web server :

<code bash>
mkdir -p /opt/jitsi/meet
rm -rf /opt/jitsi/meet/*
mkdir -p /opt/jitsi/meet/css
cp -r *.js *.html connection_optimization favicon.ico fonts images libs static sounds LICENSE lang /opt/jitsi/meet/
cp css/all.css /opt/jitsi/meet/css/
</code>

Serving this from your webserver is a bit out of scope for this how to because it can be done in a lot of different ways depending on your infra. Here's a sample nginx conf :

<hideen Here's a sample nginx config>
<file jitsi.conf>
server {
  listen 443 ssl http2;
  server_name visio.fws.fr;

  ssl_certificate_key /etc/prosody/certs/jitsi.key;
  ssl_certificate     /etc/prosody/certs/jitsi.crt;

  if ($request_method !~ ^(GET|POST|HEAD)$ ) {
    return 405;
  }

  root /opt/jitsi/meet;
  index index.html;

  # conferenceMapper endpoint
  location ~ ^/(phoneNumberList|conferenceMapper) {
    proxy_pass http://localhost:8823;
    proxy_socket_keepalive on;
  }

  # BOSH endpoint
  location /http-bind {
    proxy_socket_keepalive on;
    proxy_pass http://localhost:5280/http-bind;
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header Host $http_host;
  }

  # Websocket endpoint
  location /xmpp-websocket {
    proxy_pass http://localhost:5280/xmpp-websocket?$args;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $http_host;
    proxy_set_header X-Forwarded-For $remote_addr;
    tcp_nodelay on;
  }

  # Conference rooms
  location ~ ^/([a-zA-Z0-9=\?]+)$ {
    rewrite ^/(.*)$ / break;
  }
  location / {
    ssi on;
    limit_req zone=limit_req_std burst=100 nodelay;
    limit_conn limit_conn_std 80;
  }

  allow 0.0.0.0/0;
  deny all;
}
</file>
</hidden>

You also have to edit /opt/jitsi/meet/config.js and adapt it to your needs.
<hidden Here's a example of config.js>
<file config.js js>
var config = {
    "bosh": "//visio.fws.fr/http-bind",
    "channelLastN": -1,
    "clientNode": "http://jitsi.org/jitsimeet",
    "desktopSharingChromeExtId": null,
    "desktopSharingChromeMinExtVersion": 0.1,
    "desktopSharingChromeSources": [
        "screen",
        "window",
        "tab"
    ],
    "dialInConfCodeUrl": "https://visio.fws.fr/conferenceMapper",
    "dialInNumbersUrl": "https://visio.fws.fr/phoneNumberList",
    "disableAudioLevels": true,
    "disableThirdPartyRequests": true,
    "enableCalendarIntegration": false,
    "enableLayerSuspension": true,
    "enableNoAudioDetection": true,
    "enableNoisyMicDetection": false,
    "enableWelcomePage": true,
    // Uncomment to enable Etherpad integration
    //"etherpad_base": "https://etherpad.fws.fr/p/",
    "focusUserJid": "focus@auth.visio.fws.fr",
    "hosts": {
        "domain": "visio.fws.fr",
        "muc": "conference.visio.fws.fr"
    },
    "localRecording": {
        "enabled": true
    },
    "p2p": {
        "enabled": true,
        "preferH264": true,
        "useStunTurn": true
    },
    "requireDisplayName": false,
    "resolution": 480,
    "testing": {
        "p2pTestMode": false
    },
    "useStunTurn": true,
    "websocket": "wss://visio.fws.fr/xmpp-websocket"
};
</file>
</hidden>

Now you should be able to reach the Meet interface and join a conference.

===== Install Jigasi =====

Now that we have a working Jitsi install, we may want to integrate it with our telephony system. With this, we'll be able to join phone numbers to jitsi conference. Jigasi is the component doing this bridge. It connects to your SIP server just as a phone, and also on prosody as an XMPP user. It can send connect calls to Jitsi Videobridge.

For outbound calls, it's quite easy. Once configured and enabled, you'll get a small + in Meet interface from where you can type the number you want to call. The call will be made by Jigasi and routed by your SIP server. If the phone answer, it'll be imédiatly joined in the conf.

Inbound calls are a bit trickier, and the general workflow is the following

  * Jitsi will associate a PIN for every conference, and register the mapping in the confmapper API server (see below)
  * You need a dedicated number for Jitsi (it can be done with an internal number only, but wouldn't have a lot of sense)
  * Calls to this number must be routed to a special IVR which will ask the caller to enter the PIN of the conference he wants to join
  * Asterisk will query the confmapper API to get the name of the conference matching the PIN
  * If a match is found, Asterisk adds the name of the conference to join in a SIP header, and route the call to jigasi
  * Jigasi answer the call, get the room from the SIP header, and join the corresponding room


But first, lets install Jigasi

<code bash>
mkdir -p /opt/jitsi/jigasi
cd /opt/jitsi/src
git clone https://github.com/jitsi/jigasi.git
cd jigasi
/opt/maven/apache-maven/bin/mvn package -DskipTests -Dassembly.skipAssembly=false
unzip jigasi/target/jigasi-linux-x64-1.1-SNAPSHOT.zip -d /tmp
rsync -rvP --del /tmp/jigasi-linux-x64-1.1-SNAPSHOT/ /opt/jitsi/jigasi/
</code>

Now, we have to configure it. In this example, the SIP server on which we register is ast.fws.fr and we'll use SIP extension 304 with secret SIP_SECRET (we'll see later in this how to how to craete the extension through FreePBHX web interface)

<code bash>
mkdir -p /opt/jitsi/etc/jigasi
cat <<_EOF > /opt/jitsi/jigasi/jigasi.conf
JIGASI_OPTS=''
JAVA_SYS_PROPS=''
_EOF
cat <<_EOF > /opt/jitsi/jigasi/sip-communicator.properties
# Default room to which inbound called without a Jitsi-Conference-Room header
org.jitsi.jigasi.DEFAULT_JVB_ROOM_NAME=sip

net.java.sip.communicator.impl.protocol.SingleCallInProgressPolicy.enabled=false

# Disable packet capture
net.java.sip.communicator.packetlogging.PACKET_LOGGING_ENABLED=false

# Enable brewery
org.jitsi.jigasi.BREWERY_ENABLED=true
org.jitsi.jigasi.MUC_SERVICE_ADDRESS=conference.visio.fws.fr

# SIP acount
net.java.sip.communicator.impl.protocol.sip.acc=acc
net.java.sip.communicator.impl.protocol.sip.acc.ACCOUNT_UID=SIP\:304
# THis is the base64 encoded SIP secret. Obtained with
# echo -n SIP_SECRET | base64
net.java.sip.communicator.impl.protocol.sip.acc.PASSWORD=U0lQX1NFQ1JFVA==
net.java.sip.communicator.impl.protocol.sip.acc.PROTOCOL_NAME=SIP
net.java.sip.communicator.impl.protocol.sip.acc.SERVER_ADDRESS=ast.fws.fr
net.java.sip.communicator.impl.protocol.sip.acc.USER_ID=304
net.java.sip.communicator.impl.protocol.sip.acc.KEEP_ALIVE_INTERVAL=25
net.java.sip.communicator.impl.protocol.sip.acc.KEEP_ALIVE_METHOD=OPTIONS
net.java.sip.communicator.impl.protocol.sip.acc.VOICEMAIL_ENABLED=false
net.java.sip.communicator.impl.protocol.sip.acc.OVERRIDE_ENCODINGS=false
net.java.sip.communicator.impl.protocol.sip.acc.DOMAIN_BASE=visio.fws.fr
net.java.sip.communicator.impl.protocol.sip.acc.PROXY_ADDRESS=ast.fws.fr
net.java.sip.communicator.impl.protocol.sip.acc.PROXY_AUTO_CONFIG=false
net.java.sip.communicator.impl.protocol.sip.acc.PROXY_PORT=5060
net.java.sip.communicator.impl.protocol.sip.acc.PREFERRED_TRANSPORT=UDP

# XMPP account
net.java.sip.communicator.impl.protocol.jabber.acc=acc
net.java.sip.communicator.impl.protocol.jabber.acc.ACCOUNT_UID=Jabber:jigasi@auth.visio.fws.fr
net.java.sip.communicator.impl.protocol.jabber.acc.USER_ID=jigasi@auth.visio.fws.fr
net.java.sip.communicator.impl.protocol.jabber.acc.IS_SERVER_OVERRIDDEN=true
net.java.sip.communicator.impl.protocol.jabber.acc.SERVER_ADDRESS=jitsi.fws.fr
# This is the base64 encoded XMPP secret
# obtained with echo -n JIGASI_XMPP_PASS | base64
net.java.sip.communicator.impl.protocol.jabber.acc.PASSWORD=SklHQVNJX1hNUFBfUEFTUw==
net.java.sip.communicator.impl.protocol.jabber.acc.RESOURCE_PRIORITY=30
net.java.sip.communicator.impl.protocol.jabber.acc.BREWERY=JigasiBrewery@internal.auth.visio.fws.fr
net.java.sip.communicator.impl.protocol.jabber.acc.DOMAIN_BASE=visio.fws.fr

org.jitsi.jigasi.xmpp.acc.USER_ID=jigasi@auth.visio.fws.fr
org.jitsi.jigasi.xmpp.acc.PASS=JIGASI_XMPP_PASS
org.jitsi.jigasi.xmpp.acc.ANONYMOUS_AUTH=false
org.jitsi.jigasi.xmpp.acc.IS_SERVER_OVERRIDDEN=true
org.jitsi.jigasi.xmpp.acc.SERVER_ADDRESS=jitsi.fws.fr
org.jitsi.jigasi.xmpp.acc.JINGLE_NODES_ENABLED=false
org.jitsi.jigasi.xmpp.acc.AUTO_DISCOVER_STUN=false
org.jitsi.jigasi.xmpp.acc.IM_DISABLED=true
org.jitsi.jigasi.xmpp.acc.SERVER_STORED_INFO_DISABLED=true
org.jitsi.jigasi.xmpp.acc.IS_FILE_TRANSFER_DISABLED=true

_EOF
</code>

Now we can create a systemd unit and start the service

<code bash>
cat <<_EOF > /etc/systemd/system/jitsi-jigasi.service
[Unit]
Description=Jitsi Gateway to SIP
After=network.target

[Service]
Type=simple
SuccessExitStatus=143
EnvironmentFile=/opt/jitsi/etc/jigasi/jigasi.conf
User=jitsi
Group=jitsi
PrivateTmp=true
PrivateDevices=true
ProtectHome=true
ProtectSystem=full
Restart=on-failure
StartLimitInterval=0
RestartSec=30
ExecStart=/opt/jitsi/jigasi/jigasi.sh \
            --configdir=/opt/jitsi/etc \
            --configdirname=jigasi \
            --nocomponent=true \
            ${JIGASI_OPT}

[Install]
WantedBy=multi-user.target
_EOF
systemctl daemon-reload
systemctl enable --now jitsi-jigasi
</code>

Jigasi is now running, but it's not yet ready to be used.

===== Install confmapper daemon =====

The confmapper daemon is a small tool to register Jitsi room name <-> PIN. We'll use https://github.com/gronke/jitsi-conferencemapper-api as it's a simple and lightweigt daemon in python, using an SQLite database to store the mappings

<code bash>
yum install python3
</code>
<code bash>
mkdir -p /opt/jitsi/{data,confmapper}
chown jitsi:jitsi /opt/jitsi/data
chmod 700 /opt/jitsi/data
wget -P /opt/jitsi/confmapper/ \
  https://raw.githubusercontent.com/gronke/jitsi-conferencemapper-api/master/daemon.py
chmod 755 /opt/jitsi/confmapper/daemon.py
</code>

Now, lets configure it
<code bash>
cat <<_EOF > /opt/jitsi/confmapper/config.json
{
    "db_file": "/opt/jitsi/data/confmapper.sqlite",
    "expire_seconds": 86400,
    "host": "0.0.0.0",
    "id_max_length": 4,
    "numbers": {
        "FR": [
            "0510101010"
        ]
    },
    "port": 8823
}
_EOF
</code>

Here :
    * The daemon listens on 0.0.0.0:8823. You should configure a reverse proxy to make it accessible over HTTPS. The sample nginx configuration does it
    * Room mappings will be kept for 1 day
    * PIN will be created with 4 digits
    * The number 0510101010 is dedicated and will be announced in Jitsi interface. You can set several numbers, including different numbers for different countries

In any case, make sure requests to https://visio.fws.fr/conferenceMapper and https://visio.fws.fr/phoneNumberList are routed to this daemon (because those are the URL configured in Jitsi meet

Now, we can create a systemd unit and start the service

<code bash>
cat <<_EOF > /etc/systemd/system/jitsi-confmapper.service
[Unit]
Description=Jitsi Conference Mapper
After=network.target

[Service]
Type=simple
User=jitsi
Group=jitsi
PrivateTmp=true
PrivateDevices=true
ProtectHome=true
ProtectSystem=full
Restart=on-failure
StartLimitInterval=0
RestartSec=30
ExecStart=/opt/jitsi/confmapper/daemon.py

[Install]
WantedBy=multi-user.target
_EOF
systemctl daemon-reload
systemctl enable --now jitsi-confmapper
</code>

===== Configure Asterisk/FreePBX =====
==== Create a SIP extension ====
Now, we have to configure Asterisk. First step is to create an SIP extension for Jigasi. So we create a PJSIP extension, with ID **304** and secret **SIP_SECRET** (this is what we've configured in jigasi). In the advanced tab of the extension, there's a few things we can change

  * You might want to change the Outbound CID to advertize the 0510101010 number
  * You might change the context to **outbound-allroutes** if you don't want conference user to be able to call internal numbers. The default context is **from-internal**
  * Restrict codecs to alaw and ulaw (I had sound issues with opus and g722, so better to restrict this to known working codecs). For this, type **all** in the **Disallowed Codecs** field, and **alaw&ulaw** in the **Allowed Codec** field
  * You should also disable the **Direct Media** option

==== Create a custom IVR ====

Now, we have to create a custom IVR which will ask callers the PIN of the room they want to join. you can put it in **/etc/asterisk/extension_custom.conf**

<code>
[jitsi-ivr]
exten => s,1,Answer
exten => s,n,Set(IVR_MSG=conf-getpin)
exten => s,n,Set(TIMEOUT(digit)=3)
exten => s,n,Read(JITSI_PIN,${IVR_MSG})

; Fetch the conf name from the PIN entered
exten => s,n,AGI(jitsi_conf_pin,"https://visio.fws.fr/conferenceMapper",${JITSI_PIN}

; If we got a result, dial JIGASI SIP account, else, loop and ask again
exten => s,n,GotoIf($["${JITSI_ROOM}" != "error"]?jitsi,1)
exten => s,n(error),Playback(conf-invalid)
exten => s,n,Goto(s,1)

; We got a result, lets join jitsi room
exten => jitsi,1,Verbose(PIN ${JITSI_PIN} maps to Jitsi room ${JITSI_ROOM})
exten => jitsi,n,Dial(PJSIP/304,,b(jitsi-conference-room-header^addheader^1(${JITSI_ROOM})))
</code>

==== Create an AGI script to lookup roomname from their PIN ====

We have to create an AGI script so that asterisk can query the confmapper daemon to get the name of a room from the PIN. For this, create the script **/usr/share/asterisk/agi-bin/jitsi_conf_pin** with the following content :

<code perl>
#!/usr/bin/perl

use warnings;
use strict;
use LWP::UserAgent;
use JSON;

my $ret = 'error';

my $url = $ARGV[0] . '?id=' . $ARGV[1];
my $ua = LWP::UserAgent->new(timeout => 10);
$ua->env_proxy;

my $response = $ua->get($url);
if ($response->is_success){
  my $json = from_json($response->content);
  if (defined $json and defined $json->{conference}){
    $ret = $json->{conference};
    $ret =~ s/@.*//;
  }
}

print "SET VARIABLE JITSI_ROOM $ret\n";
</code>

The script must be executable
<code bash>
chmod +x /usr/share/asterisk/agi-bin/jitsi_conf_pin
</code>

==== Create a Custom Destination pointing on your custom IVR ====
OK, now we need to way to route calls to our new custom IVR. For this, we'll create a **Custom Destination** in FreePBX. Just set the target to **jitsi-ivr,s,1**

{{ :tuto:linux_divers:jitsi_custom_dest.png |}}

This **Custom Destination** make the IVR available in all the FreePBX routing logic.

==== Assign an internal number to the IVR to test ====
We can assign it an internal number to test it with a new **Misc Application** :

{{ :tuto:linux_divers:jitsi_misc_app.png |}}

You can now try it. Create a new room in Jitsi, and if you click on the small **i** button (bottom right), you should see a popup with the number to dial and the PIN

{{ :tuto:linux_divers:jitsi_conf_ping.png |}}

So, this conf has PIN 4845

Now, call your internal test number, which points on the custom IVR (381 in the previous screenshot). You should be prompted to enter a PIN. Once typed, asterisk will lookup on the confmapper daemon to find to which room this PIN maps. If found, you'll join the conference right away. If a wrong PI is entered, you'll be prompted again to enter the PIN.

Now, all you have to do is to define a new **Inbound Route** which points on the same **Custom Destination**

{{ :tuto:linux_divers:jitsi_inbound_route.png |}}


===== Integrate with Etherpad =====

Deploying an Etherpad instance is out of scope for this guide (but we also have an [[https://git.fws.fr/fws/ansible-roles/src/branch/master/roles/etherpad|ansible role]] for this). But, say you have it available at https://etherpad.fws.fr. All you have to do is to indicate it in **/opt/jitsi/meet/config.js** 

<code>
[...]
      "etherpad_base": "https://etherpad.fws.fr/p/",
[...]
</code>

<note tip>The trailing **/** is important</note>

===== Note on reverse proxy and Content-Security-Policy =====
We use a reverse proxy to serve all the web resources, and this reverse proxy insert CSP headers to response. In this case, we have to allow a few things to get everything working :
  * In img-src you have to add https://img.youtube.com and https://i.ytimg.com
  * In script-src you have to add https://www.youtube.com and https://s.ytimg.com
  * In frame-src you have to add https://etherpad.fws.fr wss://etherpad.fws.fr and https://www.youtube.com
  * In connect-src you have to add https://storage.googleapis.com