[ovirt-users] Ovirt Python SDK adding a directlun

[Juan Hernandez]

On 05/09/2014 10:31 AM, Juan Hernandez wrote:
> On 05/08/2014 11:37 PM, Gary Lloyd wrote:
>> When I add direct Luns this way the size shows as <1 on the GUI and 0 when called from the rest api. All the other items mentioned are not present.
>>
>> Thanks
>>
> 
> Ah, I understand. This is probably related to the fact that you aren't
> creating a storage domain, only the storage connection. This should work
> correctly, but I guess that either the GUI or the backend aren't
> completely prepared for this. I'm checking.
> 

I think this is a bug, and I didn't find any way to workaround it other
than creating the LUN using the GUI instead of the RESTAPI. I opened the
following BZ to track it:

https://bugzilla.redhat.com/1096217

>>> On 8 May 2014, at 18:05, Juan Hernandez <jhernand at redhat.com> wrote:
>>>
>>>> On 05/08/2014 05:04 PM, Gary Lloyd wrote:
>>>>
>>>> We are working on a script so that we can create an ISCSI LUN on our SAN
>>>> and then directly assign it to a vm.
>>>>
>>>> We have been able to get it to work but with one small annoyance. I
>>>> can't figure out how to populate size,serial,vendor_id and product_id
>>>> via the api. Would anyone be able to point me in the right direction ?
>>>> code (see def add_disk):
>>>>
>>>> def get_clusterid(cluster_name):
>>>>    cluster = ovirt_api.clusters.get(cluster_name)
>>>>    try:
>>>>        return cluster.id <http://cluster.id>
>>>>    except:
>>>>        logging.error('the cluster: %s does not appear to exist' %
>>>> cluster_name )
>>>>        sys.exit(1)
>>>>
>>>> def nominate_host(cluster_id):
>>>>    for host in ovirt_api.hosts.list():
>>>>        if host.cluster.id <http://host.cluster.id> == cluster_id and
>>>> host.status.state == 'up':
>>>>            host.iscsidiscover
>>>>            return host
>>>>    logging.error('could not find a suitable host to nominate in cluster:')
>>>>    sys.exit(1)
>>>>
>>>>
>>>> def iscsi_discover_and_login(cluster,target,portal,chap_user,chap_pass):
>>>>    clusterid=get_clusterid(cluster)
>>>>    host=nominate_host(clusterid)
>>>>
>>>>    iscsidet = params.IscsiDetails()
>>>>    iscsidet.address=portal
>>>>    iscsidet.username=chap_user
>>>>    iscsidet.password=chap_pass
>>>>    iscsidet.target=target
>>>>
>>>>    host.iscsidiscover(params.Action(iscsi=iscsidet))
>>>>    result = host.iscsilogin(params.Action(iscsi=iscsidet))
>>>>
>>>>    if result.status.state == 'complete':
>>>>
>>>>        storecon = params.StorageConnection()
>>>>        storecon.address=portal
>>>>        storecon.type_='iscsi'
>>>>        storecon.port=3260
>>>>        storecon.target=target
>>>>        storecon.username=chap_user
>>>>        storecon.password=chap_pass
>>>>
>>>>        ovirt_api.storageconnections.add(storecon)
>>>>
>>>>    return result
>>>>    # error checking code needs to be added to this function
>>>>
>>>> def add_disk(vm_name,wwid,target,size,portal):
>>>>
>>>>    logunit = params.LogicalUnit()
>>>>    logunit.id <http://logunit.id>=wwid
>>>>    logunit.vendor_id='EQLOGIC'
>>>>    logunit.product_id='100E-00'
>>>>    logunit.port=3260
>>>>    logunit.lun_mapping=0
>>>>    logunit.address=portal
>>>>    logunit.target=target
>>>>    logunit.size=size * 1073741824
>>>>
>>>>    stor = params.Storage(logical_unit=[logunit])
>>>>    stor.type_='iscsi'
>>>>
>>>>
>>>>    disk = params.Disk()
>>>>    disk.alias = 'vm-' + vm_name
>>>>    disk.name <http://disk.name> = disk.alias
>>>>    disk.interface = 'virtio'
>>>>    disk.bootable = True
>>>>    disk.type_ = 'iscsi'
>>>>    disk.format='raw'
>>>>    disk.set_size(size * 1073741824)
>>>>    #disk.size=size * 1073741824
>>>>    #disk.active=True
>>>>
>>>>    disk.lun_storage=stor
>>>>
>>>>    try:
>>>>        result = ovirt_api.disks.add(disk)
>>>>    except:
>>>>        logging.error('Could not add disk')
>>>>        sys.exit(1)
>>>>
>>>>    attachdisk=ovirt_api.disks.get(disk.alias)
>>>>    attachdisk.active = True
>>>>
>>>>    try:
>>>>        ovirt_api.vms.get(vm_name).disks.add(attachdisk)
>>>>    except:
>>>>        logging.error('Could attach disk to vm')
>>>>        sys.exit(1)
>>>>
>>>>    return result
>>>>
>>>>
>>>>
>>>> If we could just get the size to show correctly that would be enough,
>>>> the others don't really matter to me.
>>>>
>>>>
>>>> Thanks
>>>>
>>>> /Gary Lloyd/
>>>
>>> For a direct LUN disk all these values are ready only. Why do you need
>>> to change them?
>>>
>>> -- 
>>> Dirección Comercial: C/Jose Bardasano Baos, 9, Edif. Gorbea 3, planta
>>> 3ºD, 28016 Madrid, Spain
>>> Inscrita en el Reg. Mercantil de Madrid – C.I.F. B82657941 - Red Hat S.L.
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>>
> 
> 


-- 
Dirección Comercial: C/Jose Bardasano Baos, 9, Edif. Gorbea 3, planta
3ºD, 28016 Madrid, Spain
Inscrita en el Reg. Mercantil de Madrid – C.I.F. B82657941 - Red Hat S.L.