Scale multiple Jibri instance with Docker

1. Requirements

• Any linux distrobution with Alsa/Pulseaudio support.
• Proper Internet access.
• Docker installed.
• Required kernel module for playback interfaces
• Valid SSL certificate for jitsi-web instance.

1.1 Install required module for the kernel

Keep in mind, after installation maybe required to reboot.

# install the module
apt update && apt install linux-image-extra-virtual
# configure 5 capture/playback interfaces
echo "options snd-aloop enable=1,1,1,1,1 index=0,1,2,3,4" > /etc/modprobe.d/alsa-loopback.conf
# setup autoload the module
echo "snd-aloop" >> /etc/modules
# check that the module is loaded
lsmod | grep snd_aloop

2. Deploy jitsi-meet stack.

First deploy whole jitsi meet based on official documentation, it mean you should have working version of jitsi-meet stack with ability to record at least one session.

3. Scale Jibri instances

you can scale container of Jibri with these command.

Let's assume we want to have 4 concurrent recording

docker-compose -f docker-compose.yml -f jibri.yml  up -d --scale jibri=4

Then you will see something like this:

root@test:~/docker-jitsi-meet# docker-compose -f docker-compose.yml -f jibri.yml  up -d --scale jibri=4
dockerjitsimeet_prosody_1 is up-to-date
dockerjitsimeet_web_1 is up-to-date
dockerjitsimeet_jicofo_1 is up-to-date
dockerjitsimeet_jvb_1 is up-to-date
Starting dockerjitsimeet_jibri_1 ... done
Creating dockerjitsimeet_jibri_2 ...
Creating dockerjitsimeet_jibri_3 ...
Creating dockerjitsimeet_jibri_4 ...
Creating dockerjitsimeet_jibri_2 ... done
Creating dockerjitsimeet_jibri_3 ... done
Creating dockerjitsimeet_jibri_4 ... done

Then you should **change the loopback device in /home/jibri/.asoundrc **

docker exec -t dockerjitsimeet_jibri_2 sed -i 's/Loopback/2/g' /home/jibri/.asoundrc
docker exec -t dockerjitsimeet_jibri_3 sed -i 's/Loopback/3/g' /home/jibri/.asoundrc
docker exec -t dockerjitsimeet_jibri_4 sed -i 's/Loopback/4/g' /home/jibri/.asoundrc

Now restart the containers:

docker stop dockerjitsimeet_jibri_{2,3,4}
docker start dockerjitsimeet_jibri_{2,3,4}