def list_vols(names):
vol_info = []
output = util.exec_cmd('lvs --separator , -o lv_name,lv_time,lv_size,uuid '
'--aligned --noheadings')
for vol in output.splitlines():
name, timestamp, size, uuid = [part.strip() for part in vol.split(',')]
if name == 'tp1' or name.startswith('.'):
continue
if names and name not in names:
continue
size = size.replace('.00', '').upper()
timestamp = '{} {}'.format(timestamp.rsplit(' ', 1)[0], util.localtz())
vol_info.append(
dict(name=name,
size=size,
source='-',
created=timestamp,
serial=uuid))
for name in names:
if name not in (v['name'] for v in vol_info):
util.exit_with_msg(
'Error on {}: Volume does not exist.'.format(name))
return vol_info
def disconnect_vol(name, host):
vol_info = vol.list_vols([name])[0]
with util.host_db() as db:
if host not in db:
util.exit_with_msg(
'Error on {}: Host does not exist.'.format(host))
iqn = db[host]
lun_number = util.get_lun_number(name)
util.exec_cmd('tgtadm --lld iscsi --op delete --mode logicalunit --tid 1 '
'--lun {}'.format(lun_number))
def rename_vol(old_name, new_name):
try:
util.exec_cmd('lvrename {}/{} {}'.format(VGROUP, old_name, new_name))
except RuntimeError as exc:
if 'already exists' in str(exc):
util.exit_with_msg(
'Error on {}: Volume already exists.'.format(new_name))
elif 'not found in' in str(exc):
util.exit_with_msg(
'Error on {}: Volume does not exist.'.format(old_name))
raise
def create_vol(name, size):
try:
util.exec_cmd('lvcreate -T -V {} -n {} {}'.format(
size, name, FULL_LUN))
except RuntimeError as exc:
if 'already exists' in str(exc):
util.exit_with_msg(
'Error on {}: Volume already exists'.format(name))
raise
if not os.path.exists('/dev/mapper/{}-{}'.format(VGROUP, name)):
raise EnvironmentError(
'Could not find path to {} in dev mapper'.format(name))
def list_hosts(names):
host_info = []
with util.host_db() as db:
for host in db.keys():
if names and host not in names:
continue
host_info.append({
'name': host,
'iqn': db[host],
'wwn': '-',
'host group': '-'
})
for name in names:
if name not in (host['name'] for host in host_info):
util.exit_with_msg(
'Error on {}: Host does not exist.'.format(name))
return host_info
def connect_vol(name, host):
vol_info = vol.list_vols([name])[0]
with util.host_db() as db:
if host not in db:
util.exit_with_msg(
'Error on {}: Host does not exist.'.format(host))
iqn = db[host]
vol_path = '/dev/mapper/{}-{}'.format(VGROUP, vol_info['name'])
lun_number = util.get_unused_lun()
util.exec_cmd('tgtadm --lld iscsi --op new --mode logicalunit --tid 1 '
'--lun {} -b {}'.format(lun_number, vol_path))
util.exec_cmd('tgtadm --lld iscsi --op update --mode logicalunit --tid 1 '
'--lun {} --params scsi_sn={},vendor_id=PURESTORAGE'.format(
lun_number, vol_info['serial']))
try:
util.exec_cmd(
'tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL')
except RuntimeError as exc:
if 'rule already exists' not in str(exc):
raise