I need to run docker containers that depend on snd_aloop module. I have read that the module can be loaded inside the containers with modprobe if they are run in privileged mode.
In this context, I understand that the module needs to be available on the host.
I develop on MacOSX. Which implies running containers in boot2docker. As far as I can see, boot2docker does not come with snd_aloop module: I do not find kernel/sound/drivers/snd-aloop.ko in /lib/modules.
docker-machine makes it easy to use a custom boot2docker image. I have followed boot2docker build instructions.
The boot2docker build process uses kernel_config as a base for kernel compilation configuration make oldconfig.
I have tried to add the following options in kernel_config:
CONFIG_SND=m
CONFIG_SND_ALOOP=m
before running make oldconfig. But without any success. The generated .config does not keep any pointers to CONFIG_SND*. And thus obviously does not compile support for snd_aloop.
What am I misunderstanding ?
Jean-François Roche hinted me: I figured out what is below.
Instead of guessing configuration like
CONFIG_SND=m
I should have run make defconfig.
Then check .config and find which config might be needed.
I finally succeeded with, among others
CONFIG_SOUND=y
CONFIG_SOUND_OSS_CORE=y
CONFIG_SOUND_OSS_CORE_PRECLAIM=y
CONFIG_SND=y
CONFIG_SND_DRIVERS=y
CONFIG_SND_ALOOP=m