[ovirt-devel] Upgrade storage domains' version to V4 for 4.1 DCs

[Yaniv Kaul]

On Sun, Sep 18, 2016 at 3:34 PM, Maor Lipchuk <mlipchuk at redhat.com> wrote:

> Hi all,
>
> Few moments ago I've merged the Data Center 4.1 upgrade patches (see [1])
> The patches introduce a change in the storage domains' meta data to
> version 4 which are attached to a 4.1 Data Center
>
> Currently, there are no differences between version 3 and version 4, but
> the plan will be to add extra functionalities to V4 storage domains such as
> supporting qcow 1.1
>

It'd be great if we can document in ovirt.org somewhere what features are
going to be available in 4.1 DC.
I'm aware of qcow2v3, libgfapi, copy via HSM and discard. io=native
everywhere is a EL7.3 feature, could be coupled with the DC level - not
sure.
I hope we can also increase the lease metadata space, but that's possibly
not a 4.1 goal.
Y.


> For those of you which already have a 4.1 DC, you might encounter some
> problems since your storage domains are still configured as V3 and should
> be upgraded.
>
> For your master environment to be compatible with those changes the
> following changes should be performed:
>
> * In the engine side:
> 1. Change the storage domains version from V3 to V4:
>   update storage_domain_static set storage_domain_format_type = 4 where id
> = (SELECT id from storage_domains where storage_pool_name = '{Data Center
> name}');
>
> 2. Change the storage pool format type to 4:
>   update storage_pool set storage_pool_format_type = 4 where name = '{Data
> Center name}';
>
> * In the VDSM side:
> 1. call the upgradeStoragePool verb:
>   vdsClient -s 0 upgradeStoragePool {storage_pool_id} 4
>
> Please let me know if you encounter any issues
>
> Regards,
> Maor
>
>
> [1]
> https://gerrit.ovirt.org/#/c/63637/
> https://gerrit.ovirt.org/#/c/63717/
> https://gerrit.ovirt.org/#/c/63547/
>
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