2d694361fe
The OpenStack os-brick library uses hardcoded paths to binary files to interact with the VxFlexOS SDC. This leads to problems when using containerized OpenStack (Kolla & Red Hat). Due to the fact that VxFlexOS SDC binary files has to be used inside containers (nova, cinder, etc.) the overcloud deployment must be performed in 3 stages: 1) deploy overcloud without additional volume mounts 2) install the VxFlexOS client on the controller and compute nodes 3) update overcloud with additional volume mounts Using these changes overcloud can be deployed without update step after initial deployment since os-brick does not have external dependencies and uses python built-in libraries. The scini device through which the VxFlexOS client interacts is presented in the containers by default because /dev directory from the host is mounted in all containers. Change-Id: Ifc4dee0a51bafd6aa9865ec66c46c10087daa667 Closes-Bug: #1846483
73 lines
1.9 KiB
Python
73 lines
1.9 KiB
Python
# 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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from binascii import hexlify
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from contextlib import contextmanager
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from fcntl import ioctl
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import os
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import struct
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import uuid
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from os_brick import privileged
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SCINI_DEVICE_PATH = '/dev/scini'
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@contextmanager
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def open_scini_device():
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"""Open scini device for low-level I/O using contextmanager.
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File descriptor will be closed after all operations performed if it was
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opened successfully.
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:return: scini device file descriptor
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:rtype: int
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"""
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fd = None
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try:
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fd = os.open(SCINI_DEVICE_PATH, os.O_RDWR)
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yield fd
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finally:
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if fd:
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os.close(fd)
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@privileged.default.entrypoint
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def get_guid(op_code):
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"""Query ScaleIO sdc GUID via ioctl request.
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:param op_code: operational code
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:type op_code: int
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:return: ScaleIO sdc GUID
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:rtype: str
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"""
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with open_scini_device() as fd:
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out = ioctl(fd, op_code, struct.pack('QQQ', 0, 0, 0))
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# The first 8 bytes contain a return code that is not used
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# so they can be discarded.
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out_to_hex = hexlify(out[8:]).decode()
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return str(uuid.UUID(out_to_hex))
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@privileged.default.entrypoint
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def rescan_vols(op_code):
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"""Rescan ScaleIO volumes via ioctl request.
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:param op_code: operational code
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:type op_code: int
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"""
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with open_scini_device() as fd:
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ioctl(fd, op_code, struct.pack('Q', 0))
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