def init_vg(group, block_dev):
"""Initialize volume group.
:param group:
Name of the LVM Volume Group.
:type group:
``str``
:param block_dev:
LVM Physical Volume device backing the Volume Group
:type block_dev:
``str``
"""
# Can we see the Volume Group now that we have the block device? If
# so, we are done.
try:
lvm.vgactivate(group)
return
except subproc.CalledProcessError:
# The Volume group doesn't exist, more work to do
pass
# Create Physical Volume backend
lvm.pvcreate(device=block_dev)
# Create a Volume Group using the above Physical Volume
lvm.vgcreate(group, device=block_dev)
# Activate this Volume Group
lvm.vgactivate(group)
def activate_vg(vg_name):
"""Try activating vg"""
try:
lvm.vgactivate(group=vg_name)
return True
except subproc.CalledProcessError:
return False
def test_vgactivate(self):
"""Test LVM Volume Group activation"""
lvm.vgactivate('some_group')
treadmill.subproc.check_call.assert_called_with([
'lvm',
'vgchange',
'--activate',
'y',
'some_group',
])