Hi Team,

I am currently working on multiattach feature for HPE 3PAR cinder driver.

For this, while setting up devstack(on stable/queens) I made below change in the local.conf

[[local|localrc]]

ENABLE_VOLUME_MULTIATTACH=True

ENABLE_UBUNTU_CLOUD_ARCHIVE=False

/etc/cinder/cinder.conf:

[3pariscsi_1]

hpe3par_api_url = https://192.168.1.7:8080/api/v1

hpe3par_username = user

hpe3par_password = password

san_ip = 192.168.1.7

san_login = user

san_password = password

volume_backend_name = 3pariscsi_1

hpe3par_cpg = my_cpg

hpe3par_iscsi_ips = 192.168.11.2,192.168.11.3

volume_driver = cinder.volume.drivers.hpe.hpe_3par_iscsi.HPE3PARISCSIDriver

hpe3par_iscsi_chap_enabled = True

hpe3par_debug = True

image_volume_cache_enabled = True

/etc/cinder/policy.json:

'volume:multiattach': 'rule:admin_or_owner'

Added https://review.opendev.org/#/c/560067/2/cinder/volume/drivers/hpe/hpe_3par_common.py change in the code.

But I am getting below error in the nova log:

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [None req-2cda6e90-fd45-4bfe-960a-7fca9ba4abab demo admin] [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] Instance failed block device setup: MultiattachNotSupportedByVirtDriver: Volume dc25f09a-6ae1-4b06-a814-73a8afaba62f has 'multiattach' set, which is not supported for this instance.

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] Traceback (most recent call last):

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] File "/opt/stack/nova/nova/compute/manager.py", line 1615, in _prep_block_device

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] wait_func=self._await_block_device_map_created)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] File "/opt/stack/nova/nova/virt/block_device.py", line 840, in attach_block_devices

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] _log_and_attach(device)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] bdm.attach(*attach_args, **attach_kwargs)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] File "/opt/stack/nova/nova/virt/block_device.py", line 46, in wrapped

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] ret_val = method(obj, context, *args, **kwargs)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] File "/opt/stack/nova/nova/virt/block_device.py", line 620, in attach

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] virt_driver, do_driver_attach)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] File "/usr/local/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py", line 274, in inner

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] return f(*args, **kwargs)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] self._do_attach(*args, **_kwargs)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] do_driver_attach)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] volume_id=volume_id)

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa] MultiattachNotSupportedByVirtDriver: Volume dc25f09a-6ae1-4b06-a814-73a8afaba62f has 'multiattach' set, which is not supported for this instance.

Apr 29 04:23:04 CSSOSBE04-B09 nova-compute[31396]: ERROR nova.compute.manager [instance: fcaa5a47-fc48-489d-9827-6533bfd1a9fa]

Apr 29 05:41:20 CSSOSBE04-B09 nova-compute[20455]: DEBUG nova.virt.libvirt.driver [-] Volume multiattach is not supported based on current versions of QEMU and libvirt. QEMU must be less than 2.10 or libvirt must be greater than or equal to 3.10. {{(pid=20455) _set_multiattach_support /opt/stack/nova/nova/virt/libvirt/driver.py:619}}

stack@CSSOSBE04-B09:/tmp$ virsh --version

3.6.0

stack@CSSOSBE04-B09:/tmp$ kvm --version

QEMU emulator version 2.10.1(Debian 1:2.10+dfsg-0ubuntu3.8~cloud1)

openstack volume show -c multiattach -c status sneha1

+-------------+-----------+

| Field | Value |

+-------------+-----------+

| multiattach | True |

| status | available |

+-------------+-----------+

cinder extra-specs-list

+--------------------------------------+-------------+--------------------------------------------------------------------+

| ID | Name | extra_specs |

+--------------------------------------+-------------+--------------------------------------------------------------------+

| bd077fde-51c3-4581-80d5-5855e8ab2f6b | 3pariscsi_1 | {'volume_backend_name': '3pariscsi_1', 'multiattach': '<is> True'}|

+--------------------------------------+-------------+--------------------------------------------------------------------+

echo $OS_COMPUTE_API_VERSION

2.60

pip list | grep python-novaclient

DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.

python-novaclient 13.0.0

How do I fix this version issue on my setup to proceed? Please help.

Thanks & Regards,

Sneha Rai