def createLV(self,
vgName,
lvName,
size,
activate=True,
contiguous=False,
initialTags=()):
try:
vg_md = self.vgmd[vgName]
except KeyError:
raise se.CannotCreateLogicalVolume(vgName, lvName)
# Size is received as a string in MB. We need to convert it to bytes
# and round it up to a multiple of the VG extent size.
try:
size = int(size) << 20
except ValueError:
raise se.CannotCreateLogicalVolume(vgName, lvName)
size = utils.round(size, int(vg_md['extent_size']))
# devices is hard to emulate properly (must have a PE allocator that
# works the same as for LVM). Since we don't need this value, use None
devices = None
state = 'a' if activate else '-'
lv_attr = dict(voltype='-',
permission='w',
allocations='i',
fixedminor='-',
state=state,
devopen='-',
target='-',
zero='-')
lv_md = dict(uuid=fake_lvm_uuid(),
name=lvName,
vg_name=vgName,
attr=lv_attr,
size=str(size),
seg_start_pe='0',
devices=devices,
tags=initialTags,
writeable=True,
opened=False,
active=bool(activate))
lv_count = int(vg_md['lv_count']) + 1
if (vgName, lvName) in self.lvmd:
raise se.CannotCreateLogicalVolume(vgName, lvName)
self.lvmd[(vgName, lvName)] = lv_md
self.vgmd[vgName]['lv_count'] = str(lv_count)
# Create an LV as a regular file so we have a place to write data
if activate:
lv_path = self.lvPath(vgName, lvName)
else:
lv_path = self._lvPathInactive(vgName, lvName)
make_file(lv_path, size)
def createLV(self,
vgName,
lvName,
size,
activate=True,
contiguous=False,
initialTags=()):
try:
vg_md = self.vgmd[vgName]
except KeyError:
raise se.CannotCreateLogicalVolume(['Fake cmd'], 5, ['Fake out'],
['Fake error'])
size = self._size_param_to_bytes(size)
# devices is hard to emulate properly (must have a PE allocator that
# works the same as for LVM). Since we don't need this value, use None
devices = None
state = 'a' if activate else '-'
lv_attr = dict(voltype='-',
permission='w',
allocations='i',
fixedminor='-',
state=state,
devopen='-',
target='-',
zero='-')
lv_md = dict(uuid=fake_lvm_uuid(),
name=lvName,
vg_name=vgName,
attr=lv_attr,
size=str(size),
seg_start_pe='0',
devices=devices,
tags=initialTags,
writeable=True,
opened=False,
active=bool(activate))
lv_count = int(vg_md['lv_count']) + 1
if (vgName, lvName) in self.lvmd:
raise se.CannotCreateLogicalVolume(['Fake cmd'], 5, ['Fake out'],
['Fake error'])
self.lvmd[(vgName, lvName)] = lv_md
self.vgmd[vgName]['lv_count'] = str(lv_count)
self._create_lv_file(vgName, lvName, activate, size)
def createLV(vgName,
lvName,
size,
activate=True,
contiguous=False,
initialTags=()):
"""
Size units: MB (1024 ** 2 = 2 ** 20)B.
"""
# WARNING! From man vgs:
# All sizes are output in these units: (h)uman-readable, (b)ytes,
# (s)ectors, (k)ilobytes, (m)egabytes, (g)igabytes, (t)erabytes,
# (p)etabytes, (e)xabytes.
# Capitalise to use multiples of 1000 (S.I.) instead of 1024.
log.info(
"Creating LV (vg=%s, lv=%s, size=%sm, activate=%s, "
"contiguous=%s, initialTags=%s)", vgName, lvName, size, activate,
contiguous, initialTags)
cont = {True: "y", False: "n"}[contiguous]
cmd = ["lvcreate"]
cmd.extend(LVM_NOBACKUP)
cmd.extend(("--contiguous", cont, "--size", "%sm" % size))
for tag in initialTags:
cmd.extend(("--addtag", tag))
cmd.extend(("--name", lvName, vgName))
rc, out, err = _lvminfo.cmd(cmd, _lvminfo._getVGDevs((vgName, )))
if rc == 0:
_lvminfo._invalidatevgs(vgName)
_lvminfo._invalidatelvs(vgName, lvName)
else:
raise se.CannotCreateLogicalVolume(vgName, lvName, err)
# TBD: Need to explore the option of running lvcreate w/o devmapper
# so that if activation is not needed it would be skipped in the
# first place
if activate:
lv_path = lvPath(vgName, lvName)
st = os.stat(lv_path)
uName = pwd.getpwuid(st.st_uid).pw_name
gName = grp.getgrgid(st.st_gid).gr_name
if ":".join((uName, gName)) != USER_GROUP:
cmd = [constants.EXT_CHOWN, USER_GROUP, lv_path]
if misc.execCmd(cmd, sudo=True)[0] != 0:
log.warning(
"Could not change ownership of one or more "
"volumes in vg (%s) - %s", vgName, lvName)
else:
_setLVAvailability(vgName, lvName, "n")
