[PVE-User] Connect PVE Box to 2 iscsi server...

[Gilberto Nunes]

Hi Ronny

I'll try it then report if here!

Thanks
---
Gilberto Nunes Ferreira

(47) 3025-5907
(47) 99676-7530 - Whatsapp / Telegram

Skype: gilberto.nunes36




Em sex, 16 de ago de 2019 às 17:53, Ronny Aasen
<ronny+pve-user at aasen.cx> escreveu:
>
> On 16.08.2019 18:06, Gilberto Nunes wrote:
> > Hi there
> >
> > Here I have two iscsi servers, that work together in order to provide
> > a single connection for a certain initiator.
> > Well at least to a Windows box when using MS iSCSI initiator.
> > In such OS, I was able to connect using both iSCSI servers, and in
> > Windows storage manager, I see just one HDD.
> > So when I shutdown iscsi serverA, the HDD remain up and running, in Windows BOX.
> > However, when I try to do that in PVE Box, I was enable to active
> > multipath and I see both HDD from iSCSI servers, /dev/sdb and
> > /dev/sdc.
> > But I could not figure out how to make PVE see both HDD in storace.cfg
> > in a single one storage, just like Windows box do!
> > What do I missing??
>
> Hello
>
> I assume you need to use multipathd. I have something similar using
> Fiberchannel disks, but the method should be similar.
>
> if it is not installed, you need to install  multipath-tools using apt.
> check that multipathd is running.
>
> run "multipath -v2" it should scan and create the multipath device.
>
> with multipath -ll and dmsetup ls --tree  ; you should now see the multiple disks come together as a single device.
>
> # example
> # multipath -ll
> 3600000example00000292e42000b0000 dm-2 FUJITSU,ETERNUS_DXL
> size=5.0T features='2 queue_if_no_path retain_attached_hw_handler' hwhandler='0' wp=rw
> |-+- policy='service-time 0' prio=50 status=active
> | |- 0:0:1:0 sdc 8:32 active ready running
> | `- 2:0:1:0 sde 8:64 active ready running
> `-+- policy='service-time 0' prio=10 status=enabled
>    |- 0:0:0:0 sdb 8:16 active ready running
>    `- 2:0:0:0 sdd 8:48 active ready running
>
> verify you see the device under
> /dev/mapper/3600000example00000292e42000b0000
>
>
> use the device as you see fit. We use it as a shared lvm VG between multiple nodes for HA and failover.
> But you can also format as your filesystem of choise and mount it as a directory, or run a cluster filesystem like ocfs or gfs and mount it as a shared directory.
>
> good luck
> Ronny
>
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