modprobe: ERROR: could not insert 'kmodlve': Invalid argument on CloudLinux OS 8

Issue

On a CloudLinux OS 8 server, the LVE module fails to load with the following error:

modprobe: ERROR: could not insert 'kmodlve': Invalid argument

The following messages may also appear in /var/log/messages:

kernel: kmodlve: cgroups v2 not supported
pam_lve: Unable to initialize LVE 2

As a result, LVE initialization may fail on the server.

Environment

• CloudLinux OS 8 
• kmod-lve 
• LVE kernel module 
• TuneD profiles 
• Server running with cgroups v2

Solution

Switch the server to the CloudLinux cgroups v1 TuneD profile and reboot the server.

1. Check the available CloudLinux TuneD profiles:

tuned-adm list | grep cloudlinux

2. Apply the cloudlinux-default-cgv1 profile:

tuned-adm profile cloudlinux-default-cgv1

3. Reboot the server:

reboot

4. After the reboot, verify that the LVE module loads correctly:

modprobe kmodlve

You can also check the LVE service status and recent kernel messages:

systemctl status lve
journalctl -k | grep -i kmodlve

If the cloudlinux-default-cgv1 profile is missing

If the following error appears:

Requested profile 'cloudlinux-default-cgv1' doesn't exist

or TuneD cannot be reached:

Cannot talk to TuneD daemon via DBus. Is TuneD daemon running?

1. Check that TuneD is installed and running:

systemctl status tuned

2. If the service is not running, start and enable it:

systemctl enable --now tuned

3. Then install or reinstall the CloudLinux TuneD profiles package:

yum install tuned-profiles-cloudlinux --enablerepo=cloudlinux-updates-testing

4. After that, check the available profiles again:

tuned-adm list | grep cloudlinux

5. Then apply the cgroups v1 profile and reboot the server:

tuned-adm profile cloudlinux-default-cgv1
reboot

Cause

The issue may occur when the server is configured to use cgroups v2 while the installed kmod-lve version or current environment does not support the active cgroups v2 configuration.

CloudLinux provides dedicated TuneD profiles for cgroups v1 and cgroups v2. For most servers, the recommended profile is cloudlinux-default-cgv1. Cgroups v2 profiles are supported starting from kmod-lve 2.1-58 on CloudLinux OS 8, 9, 10, and Ubuntu 22.

We created an internal task CLKRN-2076 for further improvement.