Re: [ceph-users] rbd-nbd on CentOS

2018-09-10 Thread Ilya Dryomov
On Mon, Sep 10, 2018 at 7:46 PM David Turner wrote: > > Now that you mention it, I remember those threads on the ML. What happens if > you use --yes-i-really-mean-it to do those things and then later you try to > map an RBD with an older kernel for CentOS 7.3 or 7.4? Will that mapping > fail

Re: [ceph-users] rbd-nbd on CentOS

2018-09-10 Thread David Turner
Now that you mention it, I remember those threads on the ML. What happens if you use --yes-i-really-mean-it to do those things and then later you try to map an RBD with an older kernel for CentOS 7.3 or 7.4? Will that mapping fail because of the min-client-version of luminous set on the cluster w

Re: [ceph-users] rbd-nbd on CentOS

2018-09-10 Thread Ilya Dryomov
On Mon, Sep 10, 2018 at 7:19 PM David Turner wrote: > > I haven't found any mention of this on the ML and Google's results are all > about compiling your own kernel to use NBD on CentOS. Is everyone that's > using rbd-nbd on CentOS honestly compiling their own kernels for the clients? > This fe

[ceph-users] rbd-nbd on CentOS

2018-09-10 Thread David Turner
I haven't found any mention of this on the ML and Google's results are all about compiling your own kernel to use NBD on CentOS. Is everyone that's using rbd-nbd on CentOS honestly compiling their own kernels for the clients? This feels like something that shouldn't be necessary anymore. I would l