91 lines
3.1 KiB
Python
91 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2015 Red Hat, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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import time
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from oslo_concurrency import processutils
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from oslo_log import log
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from oslo_utils import uuidutils
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from ironic_python_agent import errors
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from ironic_python_agent.extensions import base
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from ironic_python_agent import hardware
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from ironic_python_agent import utils
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LOG = log.getLogger(__name__)
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def _execute(cmd, error_msg, check_exit_code=None):
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if check_exit_code is None:
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check_exit_code = [0]
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try:
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stdout, stderr = utils.execute(*cmd, check_exit_code=check_exit_code)
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except processutils.ProcessExecutionError as e:
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LOG.error(error_msg)
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raise errors.ISCSIError(error_msg, e.exit_code, e.stdout, e.stderr)
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def _wait_for_iscsi_daemon(interval=1, attempts=10):
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"""Wait for the ISCSI daemon to start."""
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for attempt in range(attempts):
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if os.path.exists("/var/run/tgtd.ipc_abstract_namespace.0"):
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break
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time.sleep(interval)
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else:
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error_msg = "ISCSI daemon didn't initialize"
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LOG.error(error_msg)
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raise errors.ISCSIError(error_msg, 1, '', error_msg)
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def _start_iscsi_daemon(iqn, device):
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"""Start a ISCSI target for the device."""
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LOG.debug("Starting ISCSI target on device %{device}", {'device': device})
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# Start ISCSI Target daemon
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_execute(['tgtd'], "Unable to start the ISCSI daemon")
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_wait_for_iscsi_daemon()
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cmd = ['tgtadm', '--lld', 'iscsi', '--mode', 'target', '--op',
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'new', '--tid', '1', '--targetname', iqn]
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_execute(cmd, "Error when adding a new target for iqn %s" % iqn)
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cmd = ['tgtadm', '--lld', 'iscsi', '--mode', 'logicalunit', '--op',
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'new', '--tid', '1', '--lun', '1', '--backing-store', device]
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_execute(cmd, "Error when adding a new logical unit for iqn %s" % iqn)
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cmd = ['tgtadm', '--lld', 'iscsi', '--mode', 'target', '--op',
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'bind', '--tid', '1', '--initiator-address', 'ALL']
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_execute(cmd, "Error when enabling the target to accept the specific "
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"initiators for iqn %s" % iqn)
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class ISCSIExtension(base.BaseAgentExtension):
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@base.sync_command('start_iscsi_target')
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def start_iscsi_target(self, iqn=None):
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"""Expose the disk as an ISCSI target."""
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# If iqn is not given, generate one
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if iqn is None:
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iqn = 'iqn-' + uuidutils.generate_uuid()
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device = hardware.dispatch_to_managers('get_os_install_device')
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_start_iscsi_daemon(iqn, device)
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return {"iscsi_target_iqn": iqn}
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