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from subprocess import (
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def deactivate_lvm_volume_group(block_device):
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Deactivate any volume gruop associated with an LVM physical volume.
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:param block_device: str: Full path to LVM physical volume
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vg = list_lvm_volume_group(block_device)
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cmd = ['vgchange', '-an', vg]
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def is_lvm_physical_volume(block_device):
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Determine whether a block device is initialized as an LVM PV.
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:param block_device: str: Full path of block device to inspect.
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:returns: boolean: True if block device is a PV, False if not.
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check_output(['pvdisplay', block_device])
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except CalledProcessError:
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def remove_lvm_physical_volume(block_device):
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Remove LVM PV signatures from a given block device.
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:param block_device: str: Full path of block device to scrub.
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p = Popen(['pvremove', '-ff', block_device],
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p.communicate(input='y\n')
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def list_lvm_volume_group(block_device):
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List LVM volume group associated with a given block device.
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Assumes block device is a valid LVM PV.
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:param block_device: str: Full path of block device to inspect.
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:returns: str: Name of volume group associated with block device or None
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pvd = check_output(['pvdisplay', block_device]).splitlines()
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if l.strip().startswith('VG Name'):
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vg = ' '.join(l.split()).split(' ').pop()
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def create_lvm_physical_volume(block_device):
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Initialize a block device as an LVM physical volume.
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:param block_device: str: Full path of block device to initialize.
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check_call(['pvcreate', block_device])
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def create_lvm_volume_group(volume_group, block_device):
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Create an LVM volume group backed by a given block device.
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Assumes block device has already been initialized as an LVM PV.
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:param volume_group: str: Name of volume group to create.
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:block_device: str: Full path of PV-initialized block device.
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check_call(['vgcreate', volume_group, block_device])
added
removed
hooks/charmhelpers/contrib/storage/linux/lvm.py
