On Mon, Sep 3, 2018 at 8:01 PM Fabrice Bacchella <
fabrice.bacche...@orange.fr> wrote:
>
> Le 3 sept. 2018 à 18:31, Nir Soffer <nsof...@redhat.com> a écrit :
>
> On Mon, Sep 3, 2018 at 5:07 PM Fabrice Bacchella <
> fabrice.bacche...@orange.fr> wrote:
>
>> In the release notes, I see:
>>
>> • BZ 1622700 [downstream clone - 4.2.6] [RFE][Dalton] - Blacklist all
>> local disk in multipath on RHEL / RHEV Host (RHEL 7.5)
>> Feature:
>> Blacklist local devices in multipath.
>>
>> Reason:
>> multipath repeatedly logs irrelevant errors for local devices.
>>
>> Result:
>> Local devices are blacklisted, and no irrelevant errors are logged
>> anymore.
>>
>> What defines a local disk ? I'm using a SAN on SAS. For many peoples, SAS
>> is only for local disks, but that's not the case. Will other 4.2.6 will
>> detect that ?
>>
>
> We don't have any support for SAS.
>
> If you SAS drives are attached to the host using FC or iSCSI, you are fine.
>
>
> Nope, they are attached using SAS.
>
I guess oVirt see them as FCP devices?
Are these disks connected to multiple hosts?
Please share the output of:
vdsm-client Host getDeviceList
...
Where do I find the protocol multipath thinks the drives are using ?
multipath.conf(5) says:
The protocol strings that multipath recognizes are scsi:fcp,
scsi:spi, scsi:ssa, scsi:sbp,
scsi:srp, scsi:iscsi, scsi:sas, scsi:adt, scsi:ata, scsi:unspec,
ccw, cciss, nvme, and
undef. The protocol that a path is using can be viewed by running
multipathd show
paths format "%d %P"
So this should work:
blacklist_exceptions {
protocol "(scsi:fcp|scsi:iscsi|scsi:sas)"
}
The best way to make this change is to create a dropin conf file,
and not touch /etc/multipath.conf, so vdsm will be able to update later.
$cat /etc/multipath/conf.d/local.conf
blacklist_exceptions {
protocol "(scsi:fcp|scsi:iscsi|scsi:sas)"
}
I hope it works for overriding vdsm configuration, if not, you will need to
change /etc/multipath.conf, and mark it as VDSM_PRIVATE like this;
$ head -3 /etc/multipath.conf
# # VDSM REVISION 1.6
# VDSM PRIVATE
Once it works, I suggest to file a bug to support sas disks by default.
Nir
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