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# lvm.py - lvm probing control
#
# Jeremy Katz <katzj@redhat.com>
#
# Copyright 2002 Red Hat, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# general public license.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import iutil
import os,sys
import string
output = "/tmp/lvmout"
def vgscan():
"""Runs vgscan."""
rc = iutil.execWithRedirect("vgscan",
["vgscan", "-v"],
stdout = output,
stderr = output,
searchPath = 1)
if rc:
raise SystemError, "vgscan failed"
def vgactivate(volgroup = None):
"""Activate volume groups by running vgchange -ay.
volgroup - optional single volume group to activate
"""
args = ["vgchange", "-ay"]
if volgroup:
args.append(volgroup)
rc = iutil.execWithRedirect(args[0], args,
stdout = output,
stderr = output,
searchPath = 1)
if rc:
raise SystemError, "vgchange failed"
def vgdeactivate(volgroup = None):
"""Deactivate volume groups by running vgchange -an.
volgroup - optional single volume group to deactivate
"""
args = ["vgchange", "-an"]
if volgroup:
args.append(volgroup)
rc = iutil.execWithRedirect(args[0], args,
stdout = output,
stderr = output,
searchPath = 1)
if rc:
raise SystemError, "vgchange failed"
def lvremove(lvname, vgname):
"""Removes a logical volume.
lvname - name of logical volume to remove.
vgname - name of volume group lv is in.
"""
args = ["lvremove", "-f"]
dev = "/dev/%s/%s" %(vgname, lvname)
args.append(dev)
rc = iutil.execWithRedirect(args[0], args,
stdout = output,
stderr = output,
searchPath = 1)
if rc:
raise SystemError, "lvremove failed"
def vgremove(vgname):
"""Removes a volume group. Deactivates the volume group first
vgname - name of volume group.
"""
# we'll try to deactivate... if it fails, we'll probably fail on
# the removal too... but it's worth a shot
try:
vgdeactivate(vgname)
except:
pass
args = ["vgremove", vgname]
rc = iutil.execWithRedirect(args[0], args,
stdout = output,
stderr = output,
searchPath = 1)
if rc:
raise SystemError, "vgremove failed"
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