For the purposes of this answer, let's assume your container is named `"foo".
From the host, save a copy of
/var/lib/lxc/foo/config, in case my
instructions break something.
You will need to configure your container to keep the
Be aware that such a configuration gives that container the ability to take over kernel and thereby the host.
To do this, you will want to change the
"lxc.cap.keep" configuration line.
If you are running an Ubuntu 19.04 guest that
was created with
"lxc-create --name foo --template download -- ..." then:
/var/lib/lxc/foo/config will contain a line
lxc.include = /usr/share/lxc/ubuntu.common.conf
/usr/share/lxc/ubuntu.common.conf will contain a line
lxc.include = /usr/share/lxc/config/common.conf
/usr/share/lxc/config/common.conf will contain a line like this
lxc.cap.drop = mac_admin mac_override sys_time sys_module sys_rawio
You should copy that last line to the end of
/var/lib/lxc/foo/config (or any place after the
"include /usr/share/lxc/ubuntu.common.conf") and then delete
"sys_module" from that list.
You need a copy of your kernel modules in the container.
If your host is running an Ubuntu kernel, then you may be able to do something like
"sudo apt install kernel-image-$(uname -r)" from the guest.
Otherwise from the host, may need to do something like this (assuming your container is named "foo"):
mkdir -p /var/lib/lxc/foo/rootfs/lib/modules
cp -apr /lib/modules/$(uname -r) /var/lib/lxc/foo/rootfs/lib/modules/
After that, shut down the guest foo if it is running, and then restart it with something like
"lxc-start --name foo".
The LXC container should now be able to load and unload kernel modules.