[ovirt-users] Ovirt Python SDK adding a directlun

[Juan Hernandez]

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.

>> 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.