d72e8292b7
NAME_utils.py was completely redundant and caused confusion so it was renamed to just utils/NAME.py Change-Id: Ifd9178772cca385f687ac9806e6043cfbf27813e Implements: blueprint volume-manager-refactoring
244 lines
8.0 KiB
Python
244 lines
8.0 KiB
Python
# Copyright 2014 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from fuel_agent import errors
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from fuel_agent.openstack.common import log as logging
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from fuel_agent.utils import utils
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LOG = logging.getLogger(__name__)
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def pvdisplay():
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# unit m means MiB (power of 2)
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output = utils.execute(
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'pvdisplay',
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'-C',
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'--noheading',
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'--units', 'm',
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'--options', 'pv_name,vg_name,pv_size,dev_size,pv_uuid',
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'--separator', ';',
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check_exit_code=[0])[0]
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return pvdisplay_parse(output)
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def pvdisplay_parse(output):
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pvs = []
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for line in output.split('\n'):
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line = line.strip()
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if not line:
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continue
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pv_params = line.split(';')
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pvs.append({
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'name': pv_params[0],
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'vg': pv_params[1] or None,
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'psize': utils.parse_unit(pv_params[2], 'm'),
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'devsize': utils.parse_unit(pv_params[3], 'm'),
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'uuid': pv_params[4]
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})
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LOG.debug('Found physical volumes: {0}'.format(pvs))
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return pvs
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def pvcreate(pvname, metadatasize=64, metadatacopies=2):
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# check if pv already exists
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if filter(lambda x: x['name'] == pvname, pvdisplay()):
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raise errors.PVAlreadyExistsError(
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'Error while creating pv: pv %s already exists' % pvname)
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utils.execute('pvcreate',
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'--metadatacopies', str(metadatacopies),
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'--metadatasize', str(metadatasize) + 'm',
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pvname, check_exit_code=[0])
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def pvremove(pvname):
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pv = filter(lambda x: x['name'] == pvname, pvdisplay())
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# check if pv exists
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if not pv:
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raise errors.PVNotFoundError(
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'Error while removing pv: pv %s not found' % pvname)
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# check if pv is attached to some vg
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if pv[0]['vg'] is not None:
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raise errors.PVBelongsToVGError('Error while removing pv: '
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'pv belongs to vg %s' % pv[0]['vg'])
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utils.execute('pvremove', '-ff', '-y', pvname, check_exit_code=[0])
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def vgdisplay():
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output = utils.execute(
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'vgdisplay',
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'-C',
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'--noheading',
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'--units', 'm',
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'--options', 'vg_name,vg_uuid,vg_size,vg_free',
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'--separator', ';',
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check_exit_code=[0])[0]
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return vgdisplay_parse(output)
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def vgdisplay_parse(output):
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vgs = []
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for line in output.split('\n'):
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line = line.strip()
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if not line:
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continue
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vg_params = line.split(';')
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vgs.append({
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'name': vg_params[0],
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'uuid': vg_params[1],
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'size': utils.parse_unit(vg_params[2], 'm'),
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'free': utils.parse_unit(vg_params[3], 'm', ceil=False)
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})
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LOG.debug('Found volume groups: {0}'.format(vgs))
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return vgs
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def _vg_attach_validate(pvnames):
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pvs = pvdisplay()
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# check if all necessary pv exist
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if not set(pvnames).issubset(set([pv['name'] for pv in pvs])):
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raise errors.PVNotFoundError(
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'Error while creating vg: at least one of pv is not found')
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# check if all necessary pv are not already attached to some vg
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if not set(pvnames).issubset(
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set([pv['name'] for pv in pvs if pv['vg'] is None])):
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raise errors.PVBelongsToVGError(
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'Error while creating vg: at least one of pvs is '
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'already attached to some vg')
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def vgcreate(vgname, pvname, *args):
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# check if vg already exists
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if filter(lambda x: x['name'] == vgname, vgdisplay()):
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raise errors.VGAlreadyExistsError(
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'Error while creating vg: vg %s already exists' % vgname)
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pvnames = [pvname] + list(args)
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_vg_attach_validate(pvnames)
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utils.execute('vgcreate', vgname, *pvnames, check_exit_code=[0])
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def vgextend(vgname, pvname, *args):
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# check if vg exists
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if not filter(lambda x: x['name'] == vgname, vgdisplay()):
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raise errors.VGNotFoundError(
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'Error while extending vg: vg %s not found' % vgname)
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pvnames = [pvname] + list(args)
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_vg_attach_validate(pvnames)
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utils.execute('vgextend', vgname, *pvnames, check_exit_code=[0])
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def vgreduce(vgname, pvname, *args):
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# check if vg exists
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if not filter(lambda x: x['name'] == vgname, vgdisplay()):
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raise errors.VGNotFoundError(
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'Error while reducing vg: vg %s not found' % vgname)
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pvnames = [pvname] + list(args)
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# check if all necessary pv are attached to vg
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if not set(pvnames).issubset(
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set([pv['name'] for pv in pvdisplay() if pv['vg'] == vgname])):
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raise errors.PVNotFoundError(
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'Error while reducing vg: at least one of pv is '
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'not attached to vg')
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utils.execute('vgreduce', '-f', vgname, *pvnames, check_exit_code=[0])
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def vgremove(vgname):
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# check if vg exists
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if not filter(lambda x: x['name'] == vgname, vgdisplay()):
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raise errors.VGNotFoundError(
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'Error while removing vg: vg %s not found' % vgname)
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utils.execute('vgremove', '-f', vgname, check_exit_code=[0])
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def lvdisplay():
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output = utils.execute(
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'lvdisplay',
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'-C',
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'--noheading',
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'--units', 'm',
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# NOTE(agordeev): lv_path had been removed from options
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# since versions of lvdisplay prior 2.02.68 don't have it.
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'--options', 'lv_name,lv_size,vg_name,lv_uuid',
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'--separator', ';',
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check_exit_code=[0])[0]
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return lvdisplay_parse(output)
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def lvdisplay_parse(output):
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lvs = []
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for line in output.split('\n'):
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line = line.strip()
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if not line:
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continue
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lv_params = line.split(';')
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lvs.append({
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'name': lv_params[0],
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'size': utils.parse_unit(lv_params[1], 'm'),
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'vg': lv_params[2],
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'uuid': lv_params[3],
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# NOTE(agordeev): simulate lv_path with '/dev/$vg_name/$lv_name'
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'path': '/dev/%s/%s' % (lv_params[2], lv_params[0])
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})
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LOG.debug('Found logical volumes: {0}'.format(lvs))
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return lvs
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def lvcreate(vgname, lvname, size):
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vg = filter(lambda x: x['name'] == vgname, vgdisplay())
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# check if vg exists
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if not vg:
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raise errors.VGNotFoundError(
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'Error while creating vg: vg %s not found' % vgname)
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# check if enough space is available
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if vg[0]['free'] < size:
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raise errors.NotEnoughSpaceError(
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'Error while creating lv: vg %s has only %s m of free space, '
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'but at least %s m is needed' % (vgname, vg[0]['free'], size))
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# check if lv already exists
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if filter(lambda x: x['name'] == lvname and x['vg'] == vgname,
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lvdisplay()):
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raise errors.LVAlreadyExistsError(
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'Error while creating lv: lv %s already exists' % lvname)
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# NOTE(agordeev): by default, lvcreate is configured to wipe signature
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# on allocated volume. '--yes' should be passed to avoid waiting for
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# user's confirmation:
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# "WARNING: <signature> signature detected on <device>. Wipe it? [y/n]"
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utils.execute('lvcreate', '--yes', '-L', '%sm' % size, '-n', lvname,
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vgname, check_exit_code=[0])
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def lvremove(lvpath):
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# check if lv exists
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if not filter(lambda x: x['path'] == lvpath, lvdisplay()):
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raise errors.LVNotFoundError(
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'Error while removing lv: lv %s not found' % lvpath)
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utils.execute('lvremove', '-f', lvpath, check_exit_code=[0])
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def lvremove_all():
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for lv in lvdisplay():
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lvremove(lv['path'])
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def vgremove_all():
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for vg in vgdisplay():
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vgremove(vg['name'])
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def pvremove_all():
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for pv in pvdisplay():
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pvremove(pv['name'])
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