On Wed, Jan 30, 2019 at 10:39 PM Nir Soffer <[email protected]> wrote:

> Last time we discussed this here, we had only sanlock issue:
> https://bugzilla.redhat.com/1593853
>
> The bug was fixed upstream about 2 month ago, but the Fedora package was
> not available.
>
> The package is not available yet in Fedora, but we have a build here:
> https://koji.fedoraproject.org/koji/buildinfo?buildID=1182539
>
> You can install sanlock from this build using:
>
> dnf upgrade
> https://kojipkgs.fedoraproject.org//packages/sanlock/3.6.0/4.fc28/x86_64/python2-sanlock-3.6.0-4.fc28.x86_64.rpm
> \
>
> https://kojipkgs.fedoraproject.org//packages/sanlock/3.6.0/4.fc28/x86_64/sanlock-3.6.0-4.fc28.x86_64.rpm
> \
>
> https://kojipkgs.fedoraproject.org//packages/sanlock/3.6.0/4.fc28/x86_64/sanlock-lib-3.6.0-4.fc28.x86_64.rpm
>
> Hopefully the package will pushed soon to updates-testing repo.
>
> With this you can use enable selinux as god intended.
>
> But if you update your host to kernel 4.20.4-100, multipath is broken. All
> multipath devices
> are not available, and your hosts will probably become non-operational
> since they report the
> iSCSI/FC storage domains in problem.
>
> The issue was reported here:
> https://lkml.org/lkml/2018/11/5/398
>
> And we have this Fedora 29 bug:
> https://bugzilla.redhat.com/1669235
>

The Fedora 28 bug (thanks Ben)
https://bugzilla.redhat.com/1670966

>
>
> Ben explains it is:
>
> The kernel is switching over to use block multiqueue instead of the old
> request
> queue. Part of doing this is removing support for the old request queue
> from device-mapper.  Another part is to remove support for the old
> request queue from the scsi layer. For some reason, the first part got
> into this fedora kernel, but the second part didn't.  It seems to me
> that since the fedora kernel has removed support for non-blk-mq based
> devices,
> I should have been compiled with CONFIG_SCSI_MQ_DEFAULT=y
>
>
> To fix this issue you need to add the scsi_mod.use_blk_mq=Y option to the
> kernel command line:
>
>     grubby --args=scsi_mod.use_blk_mq=Y --update-kernel
> /boot/vmlinuz-4.20.4-100.fc28.x86_64
>
> After reboot, your multipath devices will appear again.
>
> Cheers,
> Nir
>
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