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Old 09-21-2016, 12:54 PM   #1
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Missing kernel modules on OVZ server


I have an OpenVZ Vritual Server running Debian8 and i wanted to setup the ntp service. ntpd was not able to start because the process was not able to drop the privillages and run ntpd as ntp user instead of root.

After a bit of googling i found out that i hade to enable a kernel module in order to solve this issue, however, i was not able to do so because no kernel modules could be found in the system. The folder /lib/modules does not excist and lsmod returns zero results.

I contatced my vps provider and they stated that it is not possible to load kernel modules on an ovz virtual machine.

Can someone clarify this and also explain why it is not possible to have kernel modules on the machine?
Old 09-22-2016, 06:35 AM   #2
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1. because they tie into the kernel itself, and there is only one kernel controlled by the host. IF that kernel is loaded in the host you may have access to it.
2. It makes sense that the OpenVZ people should WANT this to fail. Realize that what you link to the kernel affects EVERY container, so were it possible it would have to be blocked to protect every OTHER container on that host.

You really do not need it. If the host clock is correct, so is the containers. I have not attempted skewing the clock from a container (nptdate?) so I cannot be certain it would work, but it may be worth a try. I would ask your provider first if the host clock time is being maintained using NTP: if not can they turn that on. You really do not want the module, you just want the clock to be correct.

I run many OpenVZ hosts, and run ntpd on all of them. All of my containers show the correct time WITHOUT doing anything special within the container.
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