def create_local_disk(disk_type, path=None,
size="10", disk_format="raw",
vgname=None, lvname=None):
if disk_type != "lvm" and path is None:
raise error.TestError("Path is needed for creating local disk")
if path:
utils.run("mkdir -p %s" % os.path.dirname(path))
try:
size = str(float(size)) + "G"
except ValueError:
pass
cmd = ""
if disk_type == "file":
cmd = "qemu-img create -f %s %s %s" % (disk_format, path, size)
elif disk_type == "floppy":
cmd = "dd if=/dev/zero of=%s count=1024 bs=1024" % path
elif disk_type == "iso":
cmd = "mkisofs -o %s /root/*.*" % path
elif disk_type == "lvm":
if vgname is None or lvname is None:
raise error.TestError("Both VG name and LV name are needed")
lv_utils.lv_create(vgname, lvname, size)
path = "/dev/%s/%s" % (vgname, lvname)
else:
raise error.TestError("Unknown disk type %s" % disk_type)
if cmd:
utils.run(cmd, ignore_status=True)
return path
def create_lvm_pool(spool,
pool_name,
block_device,
vg_name="vg_v2v",
target_path="/dev/vg_v2v"):
"""
Create a persistent lvm pool.
"""
# Check pool before creating
if spool.pool_exists(pool_name):
logging.debug("Pool '%s' already exists.", pool_name)
return False
if not spool.define_lvm_pool(
pool_name, block_device, vg_name=vg_name, target_path=target_path):
return False
vgroups = lv_utils.vg_list()
if vg_name not in vgroups.keys() and not spool.build_pool(pool_name):
return False
# To verify if volume group has been set.
try:
lv_utils.lv_create(vg_name, "v2v_sample", "10M", True)
lv_utils.lv_remove(vg_name, "v2v_sample")
except (error.TestError, error.CmdError), detail:
logging.error("Check volume group failed:\n%s", str(detail))
return False
def create_lvm_pool(spool, pool_name, block_device, vg_name="vg_v2v",
target_path="/dev/vg_v2v"):
"""
Create a persistent lvm pool.
"""
# Check pool before creating
if spool.pool_exists(pool_name):
logging.debug("Pool '%s' already exists.", pool_name)
return False
if not spool.define_lvm_pool(pool_name, block_device, vg_name=vg_name,
target_path=target_path):
return False
vgroups = lv_utils.vg_list()
if vg_name not in vgroups.keys() and not spool.build_pool(pool_name):
return False
# To verify if volume group has been set.
try:
lv_utils.lv_create(vg_name, "v2v_sample", "10M", True)
lv_utils.lv_remove(vg_name, "v2v_sample")
except (error.TestError, error.CmdError), detail:
logging.error("Check volume group failed:\n%s", str(detail))
return False
def run_once(
self,
vg_name="autotest_vg",
lv_name="autotest_lv",
lv_size="1G",
lv_snapshot_name="autotest_sn",
lv_snapshot_size="1G",
# size in MB
ramdisk_vg_size="40000",
ramdisk_basedir="/tmp",
ramdisk_sparse_filename="virtual_hdd",
override_flag=0,
):
"""
General logical volume setup.
The main part of the lvm setup checks whether the provided volume group
exists and if not, creates one from the ramdisk. It then creates a logical
volume if there is no logical volume, takes a snapshot from the logical
if there is logical volume but no snapshot, and merges with the snapshot
if both the snapshot and the logical volume are present.
@param vg_name: Name of the volume group.
@param lv_name: Name of the logical volume.
@param lv_size: Size of the logical volume as string in the form "#G"
(for example 30G).
@param lv_snapshot_name: Name of the snapshot with origin the logical
volume.
@param lv_snapshot_size: Size of the snapshot with origin the logical
volume also as "#G".
@param override_flag: Flag to override default policy. Override flag
can be set to -1 to force remove, 1 to force create, and 0
for default policy.
"""
# if no virtual group is defined create one based on ramdisk
if not lv_utils.vg_check(vg_name):
lv_utils.vg_ramdisk(vg_name, ramdisk_vg_size, ramdisk_basedir, ramdisk_sparse_filename)
# if no snapshot is defined start fresh logical volume
if override_flag == 1 and lv_utils.lv_check(vg_name, lv_name):
lv_utils.lv_remove(vg_name, lv_name)
lv_utils.lv_create(vg_name, lv_name, lv_size)
elif override_flag == -1 and lv_utils.lv_check(vg_name, lv_name):
lv_utils.lv_remove(vg_name, lv_name)
else:
# perform normal check policy
if lv_utils.lv_check(vg_name, lv_snapshot_name) and lv_utils.lv_check(vg_name, lv_name):
lv_utils.lv_revert(vg_name, lv_name, lv_snapshot_name)
lv_utils.lv_take_snapshot(vg_name, lv_name, lv_snapshot_name, lv_snapshot_size)
elif lv_utils.lv_check(vg_name, lv_snapshot_name) and not lv_utils.lv_check(vg_name, lv_name):
raise error.TestError("Snapshot origin not found")
elif not lv_utils.lv_check(vg_name, lv_snapshot_name) and lv_utils.lv_check(vg_name, lv_name):
lv_utils.lv_take_snapshot(vg_name, lv_name, lv_snapshot_name, lv_snapshot_size)
else:
lv_utils.lv_create(vg_name, lv_name, lv_size)
def run_once(
self,
vg_name='autotest_vg',
lv_name='autotest_lv',
lv_size='1G',
lv_snapshot_name='autotest_sn',
lv_snapshot_size='1G',
# size in MB
ramdisk_vg_size="40000",
ramdisk_basedir="/tmp",
ramdisk_sparse_filename="virtual_hdd",
override_flag=0):
"""
General logical volume setup.
The main part of the lvm setup checks whether the provided volume group
exists and if not, creates one from the ramdisk. It then creates a logical
volume if there is no logical volume, takes a snapshot from the logical
if there is logical volume but no snapshot, and merges with the snapshot
if both the snapshot and the logical volume are present.
@param vg_name: Name of the volume group.
@param lv_name: Name of the logical volume.
@param lv_size: Size of the logical volume as string in the form "#G"
(for example 30G).
@param lv_snapshot_name: Name of the snapshot with origin the logical
volume.
@param lv_snapshot_size: Size of the snapshot with origin the logical
volume also as "#G".
@param override_flag: Flag to override default policy. Override flag
can be set to -1 to force remove, 1 to force create, and 0
for default policy.
"""
# if no virtual group is defined create one based on ramdisk
if not lv_utils.vg_check(vg_name):
lv_utils.vg_ramdisk(vg_name, ramdisk_vg_size, ramdisk_basedir,
ramdisk_sparse_filename)
# if no snapshot is defined start fresh logical volume
if override_flag == 1 and lv_utils.lv_check(vg_name, lv_name):
lv_utils.lv_remove(vg_name, lv_name)
lv_utils.lv_create(vg_name, lv_name, lv_size)
elif override_flag == -1 and lv_utils.lv_check(vg_name, lv_name):
lv_utils.lv_remove(vg_name, lv_name)
else:
# perform normal check policy
if (lv_utils.lv_check(vg_name, lv_snapshot_name)
and lv_utils.lv_check(vg_name, lv_name)):
lv_utils.lv_revert(vg_name, lv_name, lv_snapshot_name)
lv_utils.lv_take_snapshot(vg_name, lv_name, lv_snapshot_name,
lv_snapshot_size)
elif (lv_utils.lv_check(vg_name, lv_snapshot_name)
and not lv_utils.lv_check(vg_name, lv_name)):
raise error.TestError("Snapshot origin not found")
elif (not lv_utils.lv_check(vg_name, lv_snapshot_name)
and lv_utils.lv_check(vg_name, lv_name)):
lv_utils.lv_take_snapshot(vg_name, lv_name, lv_snapshot_name,
lv_snapshot_size)
else:
lv_utils.lv_create(vg_name, lv_name, lv_size)
