Unable to load lve module with debug kernel

Issue

• The server shows the error "Reboot your system to update the kernel" after a recent kernel update, and the current kernel is a debug kernel like:

  # uname -rs
  Linux 4.18.0-425.13.1.lve.el8.x86_64+debug

• The kmod-lve, which provides LVE functionality, can't be loaded:
  

  # modprobe kmodlve
  modprobe: FATAL: Module kmod-lve not found in directory /lib/modules/4.18.0-425.13.1.lve.el8.x86_64+debug

Environment

• CloudLinux OS
• LVE
• kmodlve
• Kernel

Cause

Debug kmodlve module not found.

Solution

• If the installation of the debug kernel was not intentional
1. Boot the server on the last known working kernel, and remove the kernel debug packages:
   

   # yum remove kernel-debug*

2. Install the latest non-debug kernel version with
   

   # yum install kernel

3. Boot with the newest kernel again.

Note: To prevent this debug kernel from installing in the future, add "kernel-debug*" into the into the yum exclusion list with exclude= directive in the /etc/yum.conf and /etc/dnf/dnf.conf files as shown:

[main]
exclude=kernel-debug*

• II. If the debug kernel is required
1.  Install corresponding debug version of kmod-lve

   yum install kmod-lve-debug kernel-debug-modules

2. Update grub config to recreate symbols mapping
3. Load module and restart dependent services
   

   # insmod /lib/modules/4.18.0-425.13.1.lve.el8.x86_64+debug/extra/lve-2.0-50.el8/kmodlve.ko
   # service lve restart; service cagefs restart
   # service db_governor restart