[Users] SAN storage expansion

[Giorgio Bersano]

2014-03-18 9:15 GMT+01:00 Elad Ben Aharon <ebenahar at redhat.com>:
> Hi,
>
> LUNs size are being updated using the multipath mechanism. In order to update storage domain size, you'll need to update the physical volume size using LVM on you hypervisors.
>
> Please do the following:
> 1) Put the storage domain to maintenance
> 2) Execute on your hosts:
> 'pvresize --setphysicalvolumesize' with the new physical volume size (150G)
> 3) Activate the storage domain

Thank you Elad,
I knew it was required a pvresize command but wanted to be sure that I
wasn't disrupting possible storage parameters bookkeeping by the oVirt
system.
I'm wondering if it's because of this that SD has to be put in maintenance.

Any chance to have the SD resize without putting it offline, for
example doing pvresize on the SPM node and then pvscan on every other
host involved?
I'm sure there are use cases where this is would be of great convenience.


> ----- Original Message -----
> From: "Giorgio Bersano" <giorgio.bersano at gmail.com>
> To: "users at ovirt.org" <Users at ovirt.org>
> Sent: Monday, March 17, 2014 7:25:36 PM
> Subject: [Users] SAN storage expansion
>
> Hi all,
> I'm happily continuing my experiments with oVirt and I need a
> suggestion regarding storage management.
>
> I'm using an iSCSI based Storage Domain and I'm trying to understand
> which is the correct way to extend it's size some time after it's
> creation.
>
> Please consider the following steps:
>
> 1) Using storage specific tools create a new volume on iSCSI storage
> (e.g. 130.0 GiB)
>
> 2) in oVirt webadmin: Storage -> New Domain , select the previously
> created storage (130 GB), OK, after some time it's online:
>  Size: 129 GB ; Available: 125 GB ; Used: 4 GB
>
> 3) Use according to your needs (even noop is OK)
>
> 4) Using storage specific tools expand the new volume (e.g. 20.0 GiB
> more, now it says 150.0GiB)
>
> 5) in webadmin: Storage, click on the domain, Edit. Looking at
> Luns>Targets , now it correctly sees 150GB
>
> BUT
> on the Storage tab it continues to be seen with
>  Size: 129 GB ; Available: 125 GB ; Used: 4 GB
>
>
> Do you think it is possible to make oVirt aware of the new available
> storage space? Am I missing something obvious?
>
> My setup is oVirt 3.4.0 RC2 with fully patched CentOS 6.5 hosts.
>
> Best regards,
> Giorgio.
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