Jibri Docker Image does not have working snd-aloop

Install & Config
#1

I create a very simple Dockerfile that does the following:

FROM jitsi/jibri

ENTRYPOINT ["tail", "-f", "/dev/null"]

The package it pulls from is located here: Docker Hub. When I run the container and ssh into it, I run the following:

root@6109f2624c43:/# modprobe snd-aloop

modprobe: FATAL: Module snd-aloop not found in directory /lib/modules/5.10.104-linuxkit

Shouldn’t send-aloop be installed or am I doing something wrong?

#2

If this is an Ubuntu box, is linux-modules-extra-$(uname -r) installed on the host?

#3 
root@578e2888cdc1:/# apt-get install linux-modules-extra-$(uname -r)

Reading package lists... Done

Building dependency tree... Done

Reading state information... Done

E: Unable to locate package linux-modules-extra-5.10.104-linuxkit

E: Couldn't find any package by glob 'linux-modules-extra-5.10.104-linuxkit'

E: Couldn't find any package by regex 'linux-modules-extra-5.10.104-linuxkit'

But should the package already be installed and Jisti docker image be ready to go?

#4

Because this package should be installled on the host, not inside the container.

What is the outputs on host?

uname -a
lsmod | grep aloop
modprobe snd-aloop
lsmod | grep aloop
#5

Then this doesn’t quite work the way I thought it did. I was planning to on building a Docker image and then on AWS, deploying through Elastic Container Service (ECS), so I didn’t think the EC2 instance needed to have the snd-aloop, just the container. Is my thinking wrong on this?

#6

I’m not familiar with Docker and I don’t know if it’s possible to include a kernel module into the Docker container. For LXC (Linux container) I add the module to the host.

Maybe you can switch to pulseaudio (another sound system for Linux)

#7

Found this: GitHub - openfun/jibri-pulseaudio: 🎞 A Jibri docker image using pulseaudio instead of alsa

And the author said what you did also " To use Jibri within a container, it requires to create a loopback device on the host and share it to the container."

That is a little bit limiting.