[ovirt-users] Info on manual operations after removing FC storage domain

[Gianluca Cecchi]

On Tue, Oct 10, 2017 at 1:29 PM, Yaniv Kaul <ykaul at redhat.com> wrote:

>
>
> On Oct 6, 2017 2:41 PM, "Gianluca Cecchi" <gianluca.cecchi at gmail.com>
> wrote:
>
> Hello,
> I'm relocating some disks from some storage domains to other ones.
> At the end I'm going to remove source storage domains.
> All the SD involved are FC and the hosts are CentOS 7.4
> I see that after removing an SD from oVirt, the multipath part on host
> remains.
> What is the correct sequence of operations to do at hosts' side after
> completing the Webadmin Gui part?
>
>
> https://access.redhat.com/documentation/en-us/red_hat_enterp
> rise_linux/7/html/storage_administration_guide/removing_devices
>
> (which seems to be similar to your steps below. I'd remove it from the
> storage side after flushing though).
> Y.
>
>
Yes, when removing from physical servers I took that link as reference and
my steps reproduce them in practice.
I have not understood what do you mean with

"
 I'd remove it from the storage side after flushing though
"

Do yo mean this sequence:
1) flush the single path devices
2) remove the multipath device with multipath -f
??
O another thing?

Also I found in the mean time this bugzilla (for RHEV)
https://bugzilla.redhat.com/show_bug.cgi?id=1310330
where you replied and have work in progress... thanks!

I also found a reference (I miss the bugzilla id right now), that if you
have vdsm > of a certain version there are "no problems" on hosts in case
some unused (from oVirt point of view) LUNs are removed from storage array
while the hosts still enumerating them in their multipath listing. So that
this can lower potential problems...
I don't now if the enhancement s related to some sort of blacklisting or
what has been done at vdsm level....

Gianluca
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