1fe1f66428
Add ability to use LVM volumes for VM disks. Implements LVM disks support for libvirt driver. VM disks will be stored on LVM volumes in volume group specified by `libvirt_images_volume_group` option. Another option `libvirt_local_images_type` specify which storage type will be used. Supported values are `raw`, `lvm`, `qcow2`, `default`. If `libvirt_local_images_type` = `default`, usual logic with `use_cow_images` flag is used. Boolean option `libvirt_sparse_logical_volumes` controls which type of logical volumes will be created (sparsed with virtualsize or usual logical volumes with full space allocation). Default value for this option is `False`. Commit introduce three classes: `Raw`, `Qcow2` and `Lvm`. They contain image creation logic, that was stored in `LibvirtConnection._cache_image` and `libvirt_info` methods, that produce right `LibvirtGuestConfigDisk` configurations for libvirt. `Backend` class choose which image type to use. Change-Id: I0d01cb7d2fd67de2565b8d45d34f7846ad4112c2
133 lines
2.4 KiB
Python
133 lines
2.4 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2011 OpenStack LLC
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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 StringIO
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files = {}
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disk_sizes = {}
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disk_backing_files = {}
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def get_iscsi_initiator():
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return "fake.initiator.iqn"
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def create_image(disk_format, path, size):
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pass
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def create_cow_image(backing_file, path):
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pass
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def get_disk_size(path):
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return disk_sizes.get(path, 1024 * 1024 * 20)
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def get_disk_backing_file(path):
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return disk_backing_files.get(path, None)
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def copy_image(src, dest):
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pass
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def mkfs(fs, path):
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pass
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def resize2fs(path):
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pass
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def create_lvm_image(vg, lv, size, sparse=False):
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pass
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def volume_group_free_space(vg):
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pass
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def remove_logical_volumes(*paths):
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pass
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def ensure_tree(path):
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pass
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def write_to_file(path, contents, umask=None):
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pass
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def chown(path, owner):
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pass
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def create_snapshot(disk_path, snapshot_name):
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pass
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def delete_snapshot(disk_path, snapshot_name):
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pass
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def extract_snapshot(disk_path, source_fmt, snapshot_name, out_path, dest_fmt):
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files[out_path] = ''
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class File(object):
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def __init__(self, path, mode=None):
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self.fp = StringIO.StringIO(files[path])
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def __enter__(self):
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return self.fp
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def __exit__(self, *args):
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return
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def file_open(path, mode=None):
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return File(path, mode)
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def load_file(path):
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if os.path.exists(path):
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with open(path, 'r+') as fp:
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return fp.read()
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else:
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return ''
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def file_delete(path):
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return True
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def get_open_port(start_port, end_port):
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# Return the port in the middle
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return int((start_port + end_port) / 2)
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def get_fs_info(path):
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return {'total': 128 * (1024 ** 3),
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'used': 44 * (1024 ** 3),
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'free': 84 * (1024 ** 3)}
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def fetch_image(context, target, image_id, user_id, project_id):
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pass
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