On Thu, May 4, 2023 at 11:27 AM Kamil Madac <kamil.madac@gmail.com> wrote:
Thanks for the info.
As a solution we used rbd-nbd which works fine without any issues. If we will have time we will also try to disable ipv4 on the cluster and will try kernel rbd mapping again. Are there any disadvantages when using NBD instead of kernel driver?
Ceph doesn't really support dual stack configurations. It's not something that is tested: even if it happens to work for some use case today, it can very well break tomorrow. The kernel client just makes that very explicit ;) rbd-nbd is less performant and historically also less stable (although that might have changed in recent kernels as a bunch of work went into the NBD driver upstream). It's also heavier on resource usage but that won't be noticeable/can be disregarded if you are not mapping dozens of RBD images on a single node. Thanks, Ilya