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The purpose is I want to set up DRBD to run on lxc container but it looks like different from the physical server because drbd requires to syn from a block device but it does not have in lxc container.

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DRBD is a Kernel driver, and since containers do not have their own Kernel, containers cannot run DRBD. Instead, you would need to install DRBD on the container's host, and replicate the volume/directory on the host that the container is using for storage.

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  • so mean that is no way to load kernel module in their own lxc container?
    – leanghy
    Commented Mar 4, 2020 at 3:07
  • You can use a privileged container to load a kernel module into the host's kernel, but the container doesn't have it's own kernel. LINBIT, the company that created DRBD, does this with their containerized deployments for Kubernetes integration.
    – Matt Kereczman
    Commented Mar 4, 2020 at 23:27

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