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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo_config import cfg
from oslo_log import log
from ironic.common import exception
from ironic.common.i18n import _
from ironic.common import pxe_utils as common_pxe_utils
from ironic.drivers import base
CONF = cfg.CONF
LOG = log.getLogger(__name__)
class ExternalStorage(base.StorageInterface):
"""Externally driven Storage Interface."""
def validate(self, task):
def _fail_validation(task, reason,
exception=exception.InvalidParameterValue):
msg = (_("Failed to validate external storage interface for node "
"%(node)s. %(reason)s") %
{'node': task.node.uuid, 'reason': reason})
LOG.error(msg)
raise exception(msg)
if (not self.should_write_image(task)
and not common_pxe_utils.is_ipxe_enabled(task)):
msg = _("The [pxe]/ipxe_enabled option must "
"be set to True to support network "
"booting to an iSCSI volume or the boot "
"interface must be set to ``ipxe``.")
_fail_validation(task, msg)
def get_properties(self):
return {}
def attach_volumes(self, task):
pass
def detach_volumes(self, task):
pass
def should_write_image(self, task):
"""Determines if deploy should perform the image write-out.
This enables the user to define a volume and Ironic understand
that the image may already exist and we may be booting to that volume.
:param task: The task object.
:returns: True if the deployment write-out process should be
executed.
"""
instance_info = task.node.instance_info
if 'image_source' not in instance_info:
for volume in task.volume_targets:
if volume['boot_index'] == 0:
return False
return True
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