[ovirt-users] Re: FC - Storage domain - space question + direct LUN (FC) SCSI passthrough a good idea ?

[Jorge Visentini]

Hi, Morgan.

Regardless of which technology you use on your domain storage (FC, iSCSI,
NFS, Ceph...) if it reaches Critical Space, your VM will pause.
What is my practice with regard to this: I always create a Domain Storage
with double or half the space left over so I don't run out of space when a
snapshot is created.

Please correct me if I'm wrong haha

BR.

Em ter., 20 de dez. de 2022 às 12:49, morgan cox 
escreveu:

> Hi.
>
> Couple of questions regarding Fibre Channel Storage ..
>
> sing fibre channel storage domains  - I know when you create storage
> domains you get 2 files on them 'OVF_STORE' which are less than 1 GB.  I am
> using PREALLOCATED (RAW?) disks - if I were add a (preallocated) disk that
> fills the entire space would any issues occur ?
>
> e.g the 2 OVF_STORE files are preallocated so I assume they will not grow
> (or need another one adding in future ?)   - I have  noticed 'Critical
> Space Action Blocker:' size - what happens if my disk covers the entire
> free space in a stoage domain (when using preallocated disks)
>
> Also as a 2nd question :  Rather than using a storage domain if I were to
> create disks using Direct LUN (Fibrechannel LUN) is it a bad idea to enable
> SCSI-PassThrough ?  I ask as the simple FIO benchmarks I did showed
> improved  performance.
>
> Thanks
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-- 
Att,
Jorge Visentini
+55 55 98432-9868
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[ovirt-users] Re: FC Storage recover

[Strahil Nikolov via Users]

According to vdsm, there are some failed multipath paths -> you will need to 
clear them (pure LinuxSystem Administration) as they might cause the real 
symptom.
According to the log there are read errors. You have to figure out why vdsm 
fails to read the LUN.Can you try to 'dd if=/dev/mapper/multipath-wwid 
of=/dev/null bs=10M count=200' and see if it errors out.
Best Regards,Strahil Nikolov 
  On Fri, May 6, 2022 at 15:37, Nyika Csaba wrote:   
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[ovirt-users] Re: FC Storage recover

[Nyika Csaba]

Yes. All 27 nodes up and running.Thankscsabany Eredeti levél 
Feladó: Strahil Nikolov Dátum: 2022 május 6 
08:37:45Tárgy: Re: [ovirt-users] Re: FC Storage recoverCímzett: Nyika Csaba 
 users@ovirt.org Do all hosts have 
'active ready running' ?P.S.: It will take me some time to look in the logs as 
it's hard to check them on the move.Best Regards,Strahil NikolovOn Thu, May 5, 
2022 at 22:09, Nyika Csaba 
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[ovirt-users] Re: FC Storage recover

[Strahil Nikolov via Users]

Do all hosts have 'active ready running' ?
P.S.: It will take me some time to look in the logs as it's hard to check them 
on the move.
Best Regards,Strahil Nikolov
 
 
  On Thu, May 5, 2022 at 22:09, Nyika Csaba wrote:   
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[ovirt-users] Re: FC Storage recover

[Strahil Nikolov via Users]

Login over ssh to the SPM, then trigger the Activate button and then copy the 
vdsm log (last one) from the host.Also check with 'multipath -ll  
36005076300808894600a' if all hosts have the multipath device  and 
it's status is good.oVirt refuses to activate if it can't mount a file-based 
storage (NFS, Gluster) or access the LV on the block-based storage domains (FC, 
iSCSI,etc).
Also in the vdsm logs of the SPM should have a clue why it fails to activate.
I'm not sure if oVirt uses SCSI reservations or not, but it's worth checking).
Best Regards,Strahil Nikolov
 
 
  On Thu, May 5, 2022 at 16:36, Nyika Csaba wrote:   
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[ovirt-users] Re: FC Storage recover

[Nyika Csaba]

No, the 'Activate' button is active, but activate job failed.So if i check the 
lsblk on a node, in this FC ID i hava got only a simpe line like this:sdao  
 
66:128  0    51T  0 disk  └─36005076300808894600a   
    253:119  0    51T  0 mpathThe others (for 
example):sdan   
    66:112  0    25T  0 disk  └─360050763008088946008   
    253:15   0    25T  0 mpath  
├─1831603c--e583--412a--b20e--f97b31ad9a55-metadata 
    253:39   0   512M  0 lvm    ├─1831603c--e583--412a--b20e--f97b31ad9a55-ids  
    253:50   0   128M  0 lvm    
├─1831603c--e583--412a--b20e--f97b31ad9a55-leases   
    253:84   0 2G  0 lvm    
├─1831603c--e583--412a--b20e--f97b31ad9a55-outbox   
    253:97   0   128M  0 lvm    
├─1831603c--e583--412a--b20e--f97b31ad9a55-inbox
    253:98   0   128M  0 lvm    
├─1831603c--e583--412a--b20e--f97b31ad9a55-master   
    253:99   0 1G  0 lvm    
├─1831603c--e583--412a--b20e--f97b31ad9a55-xleasesI think on this storge has a 
data corruption maybe.Best,csabany--- Eredeti levél Feladó: Strahil 
Nikolov Dátum: 2022 május 5 14:43:41Tárgy: Re: 
[ovirt-users] Re: FC Storage recoverCímzett: csab...@freemail.hu 
users@ovirt.org If it's inactive, is the 'Activate' button 
greyed out ?Best Regards,Strahil NikolovOn Thu, May 5, 2022 at 8:41, Nyika 
Csaba 
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[ovirt-users] Re: FC Storage recover

[Strahil Nikolov via Users]

If it's inactive, is the 'Activate' button greyed out ?
Best Regards,Strahil Nikolov
 
 
  On Thu, May 5, 2022 at 8:41, Nyika Csaba wrote:   
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[ovirt-users] Re: FC Storage recover

[Nyika Csaba]

That was i tried first but i got "Error while executing action: Cannot 
deactivate Storage. The relevant Storage Domain's status is Inactive." 
message.Which logfile should i send from the SPM host? I downloded and zipped 
the whole /var/log but it's too large (105mb).Thankscsabany Eredeti 
levél Feladó: Strahil Nikolov Dátum: 2022 május 
4 17:23:03Tárgy: Re: [ovirt-users] Re: FC Storage recoverCímzett: Nyika Csaba 
 users@ovirt.org You will have to provide 
some logs from the SPM.If you don't use the storage domain (at least this is 
the impression), try to set it into maintenance and activate it again (UI -> 
Storage domain -> Select domain -> Datacenter -> Maintenance).Best 
Regards,Strahil NikolovOn Wed, May 4, 2022 at 18:00, Nyika 
Csaba 
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[ovirt-users] Re: FC Storage recover

[Strahil Nikolov via Users]

You will have to provide some logs from the SPM.
If you don't use the storage domain (at least this is the impression), try to 
set it into maintenance and activate it again (UI -> Storage domain -> Select 
domain -> Datacenter -> Maintenance).
Best Regards,Strahil Nikolov
 
 
  On Wed, May 4, 2022 at 18:00, Nyika Csaba wrote:   
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[ovirt-users] Re: FC Storage recover

[Nyika Csaba]

All host status is "up".Yes i do.The node26617 (on the fcerrorovirt.jpg ) is 
the SPM.thanks,csabany Eredeti levél Feladó: Strahil Nikolov 
Dátum: 2022 május 4 08:52:24Tárgy: Re: [ovirt-users] Re: 
FC Storage recoverCímzett: Nyika Csaba  users@ovirt.org 
What is the status of your hosts ? Do you have a host 
designated as SPM ?Best Regards,Strahil NikolovOn Wed, May 4, 2022 at 8:03, 
Nyika Csaba 
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[ovirt-users] Re: FC Storage recover

[Strahil Nikolov via Users]

What is the status of your hosts ? Do you have a host designated as SPM ?
Best Regards,Strahil Nikolov
 
 
  On Wed, May 4, 2022 at 8:03, Nyika Csaba wrote:   
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[ovirt-users] Re: FC Storage recover

[Strahil Nikolov via Users]

>I see the 4th FC ID, but it's on "Can't Extend" status.
I have no idea what this one means. Can you give a screenshot ?
Best Regards,Strahil Nikolov
 
 
Hi,

We have a 4 node cluster (4.4.10) and a standalone manager.
We attached to this cluster 4 volumes on FC.
Last week we lost the storage canisters (both), but recovered one of them from 
the storage disks. 
Unfortunatly only 3 storages came back from offline.
I see the 4th FC ID, but it's on "Can't Extend" status.
If i check the storages on nodes (lsblk), i can see only the ID not more on 
this 4th storage.

Do you know any recovery tool or any idea for this situation?

Thanks 
csabany    
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[ovirt-users] Re: FC Storage

[Raz Tamir]

On Wed, Jun 13, 2018, 00:21 Conrad Jones  wrote:

> am i correct in thinkin a storage domain maps directly to a LUN and is the
> equivalent to a datastore in vsphere parlance ?
>
Storage domain is a pool of storage based on a LUN in case of SAN or path
in case of NAS storage.
A storage domain can be formed based on a 1 or more LUNs.
>From that storage domain you can create disks to attach to your VMs

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[ovirt-users] Re: FC Storage

[Carlos Cesario]

Hi Christopher, thank you by info..


I will read about it.


Best regards

Carlos


__



De: Christopher Cox 
Enviado: terça-feira, 12 de junho de 2018 17:58:07
Para: users@ovirt.org
Assunto: [ovirt-users] Re: FC Storage

On 06/12/2018 01:04 PM, Carlos Cesario wrote:
> Hi Folks,
>
>
> Could someone could suggest me what is the best way to usage FC Storage
> with oVirt ?
>
> Is there any wayt to create DataStorage like "VMware" with Luns? Or need
> I usage the LUNS as VM disks!?
>
>
> Sorry by compare with VMware, but  cyurrently Im using VMware and
> planning to move to oVirt solution.
>

You basically carve out LUNs to create Storage Domains in oVirt and
create virtual disks out of that (the Storage Domain acts like a pool of
storage for oVirt use).

While there are use cases for direct LUN mapping, it's not the "norm".
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[ovirt-users] Re: FC Storage

[Carlos Cesario]

Hi Raz, Thanks by info.


So oVirt can "format"the Lun and usage it like a "datastore" shared with other 
nodes?


regards


Carlos


De: Raz Tamir 
Enviado: terça-feira, 12 de junho de 2018 17:48:07
Para: Carlos Cesario
Cc: users
Assunto: Re: [ovirt-users] FC Storage



On Tue, Jun 12, 2018, 23:39 Carlos Cesario 
mailto:ccesa...@blueit.com.br>> wrote:

Hi Folks,


Could someone could suggest me what is the best way to usage FC Storage with 
oVirt ?

Is there any wayt to create DataStorage like "VMware" with Luns? Or need I 
usage the LUNS as VM disks!?

You can do both,
Storage domains based on FC LUNs or FC direct LUNs attached as a VM disk

See:
https://ovirt.org/develop/release-management/features/storage/direct-lun/

https://www.ovirt.org/documentation/install-guide/chap-Configuring_Storage/


Sorry by compare with VMware, but  cyurrently Im using VMware and planning to 
move to oVirt solution.


Regards


Carlos


__


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[ovirt-users] Re: FC Storage

[Conrad Jones]

am i correct in thinkin a storage domain maps directly to a LUN and is the
equivalent to a datastore in vsphere parlance ?
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[ovirt-users] Re: FC Storage

[Christopher Cox]

On 06/12/2018 01:04 PM, Carlos Cesario wrote:

Hi Folks,


Could someone could suggest me what is the best way to usage FC Storage 
with oVirt ?


Is there any wayt to create DataStorage like "VMware" with Luns? Or need 
I usage the LUNS as VM disks!?



Sorry by compare with VMware, but  cyurrently Im using VMware and 
planning to move to oVirt solution.




You basically carve out LUNs to create Storage Domains in oVirt and 
create virtual disks out of that (the Storage Domain acts like a pool of 
storage for oVirt use).


While there are use cases for direct LUN mapping, it's not the "norm".
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[ovirt-users] Re: FC Storage

[Raz Tamir]

On Tue, Jun 12, 2018, 23:39 Carlos Cesario  wrote:

> Hi Folks,
>
>
> Could someone could suggest me what is the best way to usage FC Storage
> with oVirt ?
>
> Is there any wayt to create DataStorage like "VMware" with Luns? Or need I
> usage the LUNS as VM disks!?
>
You can do both,
Storage domains based on FC LUNs or FC direct LUNs attached as a VM disk

See:
https://ovirt.org/develop/release-management/features/storage/direct-lun/

https://www.ovirt.org/documentation/install-guide/chap-Configuring_Storage/

>
> Sorry by compare with VMware, but  cyurrently Im using VMware and planning
> to move to oVirt solution.
>
>
> Regards
>
>
> Carlos
>
>
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