# Scalable Jitsi installation A single server Jitsi installation is good for a limited size of concurrent conferences. The first limiting factor is the videobridge component, that handles the actual video and audio traffic. It is easy to scale the video bridges horizontally by adding as many as needed. In a cloud based environment, additionally the bridges can be scaled up or down as needed. *NB*: The [Youtube Tutorial on Scaling](https://www.youtube.com/watch?v=LyGV4uW8km8) is outdated and describes an old configuration method. *NB*: Building a scalable infrastructure is not a task for beginning Jitsi Administrators. The instructions assume that you have installed a single node version successfully, and that you are comfortable installing, configuring and debugging Linux software. This is not a step-by-step guide, but will show you, which packages to install and which configurations to change. Use the [manual install](https://github.com/jitsi/jitsi-meet/blob/master/doc/manual-install.md) for details on how to setup Jitsi on a single host. It is highly recommended to use configuration management tools like Ansible or Puppet to manage the installation and configuration. ## Architecture (Single Jitsi-Meet, multiple videobridges) A first step is to split the functions of the central jitsi-meet instance (with nginx, prosody and jicofo) and videobridges. A simplified diagram (with open network ports) of an installation with one Jitsi-Meet instance and three videobridges that are load balanced looks as follows. Each box is a server/VM. ``` + + | | | | v v 80, 443 TCP 443 TCP, 10000 UDP +--------------+ +---------------------+ | nginx | 5222, 5347 TCP | | | jitsi-meet |<-------------------+| jitsi-videobridge | | prosody | | | | | jicofo | | +---------------------+ +--------------+ | | +---------------------+ | | | +----------+| jitsi-videobridge | | | | | +---------------------+ | | +---------------------+ | | | +----------+| jitsi-videobridge | | | +---------------------+ ``` ## Machine Sizing The Jitsi-Meet server will generally not have that much load (unless you have many) conferences going at the same time. A 4 CPU, 8 GB machine will probably be fine. The videobridges will have more load. 4 or 8 CPU with 8 GB RAM seems to be a good configuration. ### Installation of Jitsi-Meet Assuming that the installation will run under the following FQDN: `meet.example.com` and you have SSL cert and key in `/etc/ssl/meet.example.com.{crt,key}` Set the following DebConf variables prior to installing the packages. (We are not installing the `jitsi-meet` package which would handle that for us) Install the `debconf-utils` package ``` $ cat << EOF | sudo debconf-set-selections jitsi-videobridge jitsi-videobridge/jvb-hostname string meet.example.com jitsi-meet jitsi-meet/jvb-serve boolean false jitsi-meet-prosody jitsi-videobridge/jvb-hostname string meet.example.com jitsi-meet-web-config jitsi-meet/cert-choice select I want to use my own certificate jitsi-meet-web-config jitsi-meet/cert-path-crt string /etc/ssl/meet.example.com.crt jitsi-meet-web-config jitsi-meet/cert-path-key string /etc/ssl/meet.example.com.key EOF ``` On the jitsi-meet server, install the following packages: * `nginx` * `prosody` * `jicofo` * `jitsi-meet-web` * `jitsi-meet-prosody` * `jitsi-meet-web-config` ### Installation of Videobridge(s) For simplicities sake, set the same `debconf` variables as above and install * `jitsi-videobridge2` ### Configuration of jitsi-meet #### Firewall Open the following ports: Open to world: * 80 TCP * 443 TCP Open to the videobridges only * 5222 TCP (for Prosody) * 5347 TCP (for Jicofo) #### NGINX Create the `/etc/nginx/sites-available/meet.example.com.conf` as usual #### Prosody Follow the steps in the [manual install](https://github.com/jitsi/jitsi-meet/blob/master/doc/manual-install.md) for setup tasks You will need to adapt the following files (see the files in `example-config-files/scalable`) * `/etc/prosody/prosody.cfg.lua` * `/etc/prosody/conf.avail/meet.example.com.cfg.lua` #### Jitsi-Meet Adapt `/usr/share/jitsi-meet/config.js` and `/usr/share/jitsi-meet/interface-config.js` to your specific needs #### Jicofo You will need to adapt the following files (see the files in `example-config-files/scalable`) * `/etc/jitsi/jicofo/config` (hostname, jicofo_secret, jicofo_password) * `/etc/jitsi/jicofo/sip-communicator.properties` (hostname) ### Configuration of the Videobridge #### Firewall Open the following ports: Open to world: * 443 TCP * 10000 UDP #### jitsi-videobridge2 You will need to adapt the following files (see the files in `example-config-files/scalable`) Each videobridge will have to have it's own, unique nickname * `/etc/jitsi/videobridge/config` (hostname, password) * `/etc/jitsi/jicofo/sip-communicator.properties` (hostname of jitsi-meet, nickname of videobridge, vb_password) With the latest stable (April 2020) videobridge, it is no longer necessary to set public and private IP adresses in the `sip-communicator.properties` as the bridge will figure out the correct configuration by itself. ## Testing After restarting all services (`prosody`, `jicofo` and all the `jitsi-videobridge2`) you can see in `/var/log/prosody/prosody.log` and `/var/log/jitsi/jicofo.log` that the videobridges connect to Prososy and that Jicofo picks them up. When a new conference starts, Jicofo picks a videobridge and schedules the conference on it.