def lvcreate(vgname, lvname, size):
vg = get_first_by_key_value(vgdisplay(), 'name', vgname)
# check if vg exists
if not vg:
raise errors.VGNotFoundError(
'Error while creating vg: vg %s not found' % vgname)
# check if enough space is available
if vg['free'] < size:
raise errors.NotEnoughSpaceError(
'Error while creating lv: vg %s has only %s m of free space, '
'but at least %s m is needed' % (vgname, vg['free'], size))
# check if lv already exists
if next(
(x for x in lvdisplay() if x['name'] == lvname and x['vg'] == vgname),
False):
raise errors.LVAlreadyExistsError(
'Error while creating lv: lv %s already exists' % lvname)
# NOTE(agordeev): by default, lvcreate is configured to wipe signature
# on allocated volume. '--yes' should be passed to avoid waiting for
# user's confirmation:
# "WARNING: <signature> signature detected on <device>. Wipe it? [y/n]"
# FIXME: the version of lvm2 shipped with Ubuntu 14.04 does not support
# --yes option. fuel-agent should properly decomission the storage
# (Ubuntu installer does that just fine).
stdout, stderr = utils.execute('lvcreate', '--help')
force_opt = '--yes' if '--yes' in stdout else ''
cmd = 'lvcreate {force_opt} -L {size}m -n {lvname} {vgname}'.format(
size=size, lvname=lvname, vgname=vgname, force_opt=force_opt)
utils.execute(*cmd.split(), check_exit_code=[0])
def lvcreate(vgname, lvname, size):
vg = filter(lambda x: x['name'] == vgname, vgdisplay())
# check if vg exists
if not vg:
raise errors.VGNotFoundError(
'Error while creating vg: vg %s not found' % vgname)
# check if enough space is available
if vg[0]['free'] < size:
raise errors.NotEnoughSpaceError(
'Error while creating lv: vg %s has only %s m of free space, '
'but at least %s m is needed' % (vgname, vg[0]['free'], size))
# check if lv already exists
if filter(lambda x: x['name'] == lvname and x['vg'] == vgname,
lvdisplay()):
raise errors.LVAlreadyExistsError(
'Error while creating lv: lv %s already exists' % lvname)
# NOTE(agordeev): by default, lvcreate is configured to wipe signature
# on allocated volume. '--yes' should be passed to avoid waiting for
# user's confirmation:
# "WARNING: <signature> signature detected on <device>. Wipe it? [y/n]"
utils.execute('lvcreate',
'--yes',
'-L',
'%sm' % size,
'-n',
lvname,
vgname,
check_exit_code=[0])
def vgextend(vgname, pvname, *args):
# check if vg exists
if not filter(lambda x: x['name'] == vgname, vgdisplay()):
raise errors.VGNotFoundError(
'Error while extending vg: vg %s not found' % vgname)
pvnames = [pvname] + list(args)
_vg_attach_validate(pvnames)
utils.execute('vgextend', vgname, *pvnames, check_exit_code=[0])
def vgextend(vgname, pvname, *args):
# check if vg exists
if not get_first_by_key_value(vgdisplay(), 'name', vgname, False):
raise errors.VGNotFoundError(
'Error while extending vg: vg %s not found' % vgname)
pvnames = [pvname] + list(args)
_vg_attach_validate(pvnames)
utils.execute('vgextend', vgname, *pvnames, check_exit_code=[0])
def vgreduce(vgname, pvname, *args):
# check if vg exists
if not filter(lambda x: x['name'] == vgname, vgdisplay()):
raise errors.VGNotFoundError(
'Error while reducing vg: vg %s not found' % vgname)
pvnames = [pvname] + list(args)
# check if all necessary pv are attached to vg
if not set(pvnames).issubset(
set([pv['name'] for pv in pvdisplay() if pv['vg'] == vgname])):
raise errors.PVNotFoundError(
'Error while reducing vg: at least one of pv is '
'not attached to vg')
utils.execute('vgreduce', '-f', vgname, *pvnames, check_exit_code=[0])
def lvcreate(vgname, lvname, size):
vg = filter(lambda x: x['name'] == vgname, vgdisplay())
# check if vg exists
if not vg:
raise errors.VGNotFoundError(
'Error while creating vg: vg %s not found' % vgname)
# check if enough space is available
if vg[0]['free'] < size:
raise errors.NotEnoughSpaceError(
'Error while creating lv: vg %s has only %s m of free space, '
'but at least %s m is needed' % (vgname, vg[0]['free'], size))
# check if lv already exists
if filter(lambda x: x['name'] == lvname, lvdisplay()):
raise errors.LVAlreadyExistsError(
'Error while creating lv: lv %s already exists' % lvname)
utils.execute('lvcreate',
'-L',
'%sm' % size,
'-n',
lvname,
vgname,
check_exit_code=[0])
def vgremove(vgname):
# check if vg exists
if not filter(lambda x: x['name'] == vgname, vgdisplay()):
raise errors.VGNotFoundError(
'Error while removing vg: vg %s not found' % vgname)
utils.execute('vgremove', '-f', vgname, check_exit_code=[0])
def vgremove(vgname):
# check if vg exists
if not get_first_by_key_value(vgdisplay(), 'name', vgname, False):
raise errors.VGNotFoundError(
'Error while removing vg: vg %s not found' % vgname)
utils.execute('vgremove', '-f', vgname, check_exit_code=[0])
