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  1. Chuck
  2. Thursday, June 29, 2017
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We are having some issues between cdp-agent and KC, mainly when KC modifies running kernel and there is a restart of the cdp-agent after the fact. When this happens it becomes impossible for backups to run and they fail with:

The replication driver was not detected (detail: An error occurred while loading the hcpdriver module, please check your system logs


[email protected] [~]# uname -r
3.10.0-614.10.2.lve1.4.50.el7.x86_64

/usr/bin/kcarectl --uname
3.10.0-614.10.2.lve1.4.55.el7

The agent was fine running like this until it was restarted. I have tried hcpdriver for 4.55 but this does not help.

This happens occasionally across our servers. So now I am stuck with a reboot to fix this which kind of goes against one of the reasons why I have KC running.

Or is there another workaround?
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  1. 04.07.2017 12:07:35
  2. # 1
Posts: 46
Joined: 17.08.2016
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Hi, Chuck! When using KernelCare, third-party kernel modules still should be built for the kernel version the system booted with (3.10.0-614.10.2.lve1.4.50.el7.x86_64 in your case). If there are still problems with building hcpdriver module, please, make sure that corresponding kernel-devel package is installed (kernel-devel-3.10.0-614.10.2.lve1.4.50.el7.x86_64.rpm in your case) and contact R1soft support.
  1. 20.09.2017 05:09:29
  2. # 2
Stuart Ryan Accepted Answer
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I think there is something more sinister that is a problem here, and it has only occurred with this new latest version.

The problem appears to be on R1Soft's side, however, I am unable to get support from them, they refused to let me create a technical support account, and the reseller I go through informed me that 'R1Soft support is basically non-existent, so I should just wait until they release a new version'.

Rather frustrating, but throwing it out that I am also affected and KernelCare does not seem to be at fault.
Cheers,
Stuart
  1. 11.12.2017 13:12:58
  2. # 3
Dennis Hermannsen Accepted Answer
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We actually got KernelCare for the sole reason that we didn't want to reboot and build new kernel modules for R1Soft when a new kernel was available. I guess we're not able to avoid the reboot anyway?
We're also having problems building the new kernel module for the latest CL7 kernel, but I'd figure it's a problem with R1Soft.
  1. 15.12.2017 08:12:37
  2. # 4
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Hi! Could you please open a support ticket - https://cloudlinux.zendesk.com , and provide more detail with kcdoctor command, and our support team will help you ASAP.

Thanks!
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