def create(self, lv_name, lv_size):
"""Create logical volume; return True"""
lv_size = str(lv_size) + self.lv_units
lv_name = common.validate_hostname(
lv_name) # LV names are always hostnames
lv_size = common.validate_storage_format(lv_size)
args = ['lvcreate', '-n', lv_name, '-L', lv_size, self.vg_name]
str_args = " ".join(args)
msg = "Running " + str_args
self.log.debug(msg)
try:
result = subprocess.Popen(args,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
except Exception:
msg = 'Running command %s failed' % str_args
# trace = traceback.format_exec()
raise error.SpokeError(msg)
data = result.communicate()
stdout = data[0]
stderr = data[1]
msg = "Command stdout was: %s, stderr was: %s" % (stdout, stderr)
self.log.debug(msg)
# Errors we know about
if "Volume group \"%s\" not found" % self.vg_name in stderr:
msg = "volume group '%s' was not found." % self.vg_name
raise error.NotFound(msg)
elif "Insufficient free extents" in stderr:
msg = "Not enough free space to create LV"
raise error.InsufficientResource(msg)
elif "Logical volume \"%s\" already exists in volume group \"%s\"" % (
lv_name, self.vg_name) in stderr:
msg = "Logical volume '%s' already exists in volume group '%s'" % (
lv_name, self.vg_name)
raise error.AlreadyExists(msg)
# Catch unexpected errors
if result.returncode != 0:
msg = "Create command returned non-zero: %s stdout was: %s, stderr was: %s" % \
(result.returncode, stdout, stderr)
raise error.LVMError(msg)
result = self.get(lv_name)
if result['exit_code'] == 0 and result['count'] == 1:
result['msg'] = "Created %s:" % result['type']
return result
else:
msg = 'Create operation returned OK, but unable to find object'
raise error.NotFound(msg)
self.log.debug('Result: %s' % result)
return result
def delete(self, lv_name):
"""Delete logical volume; return True."""
lv_name = common.validate_hostname(
lv_name) # LV names are always hostnames
args = ['lvremove', '-f', '%s/%s' % (self.vg_name, lv_name)]
str_args = " ".join(args)
msg = "Running " + str_args
self.log.debug(msg)
try:
result = subprocess.Popen(args,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
except Exception:
msg = 'Running command %s failed' % str_args
#trace = traceback.format_exec()
raise error.SpokeError(msg)
data = result.communicate()
stdout = data[0]
stderr = data[1]
msg = "Command stdout was: %s, stderr was: %s" % (stdout, stderr)
self.log.debug(msg)
if "Volume group \"%s\" not found" % self.vg_name in stderr:
msg = "volume group '%s' was not found." % self.vg_name
raise error.NotFound(msg)
elif "logical volume(s) not found" in stderr:
msg = "logical volume '%s' not found." % lv_name
raise error.NotFound(msg)
# Catch non-specific errors
if result.returncode != 0:
msg = "Delete command returned non-zero: %s stdout was: %s, stderr was: %s" % \
(result.returncode, stdout, stderr)
raise error.LVMError(msg)
result = self.get(lv_name)
if result['exit_code'] == 3 and result['count'] == 0:
result['msg'] = "Deleted %s:" % result['type']
self.log.debug('Result: %s' % result)
return result
else:
msg = 'Delete operation returned OK, but object still there?'
raise error.SearchError(msg)
def get(self, lv_name=None):
"""Get logical volume; return list of volume attributes."""
if lv_name is not None:
lv_name = common.validate_hostname(
lv_name) # LV names are always hostnames
args = [
'lvs', '--noheadings', '--units', self.lv_units, '-o',
'lv_name,lv_size', '--separator', ':',
'/dev/%s/%s' % (self.vg_name, lv_name)
]
else:
args = [
'lvs', '--noheadings', '--units', self.lv_units, '-o',
'lv_name,lv_size', '--separator', ':',
'/dev/%s' % self.vg_name
]
str_args = " ".join(args)
msg = "Running " + str_args
self.log.debug(msg)
try:
result = subprocess.Popen(args,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
close_fds=True)
except Exception:
msg = 'Running command %s failed' % str_args
#trace = traceback.format_exec()
raise error.SpokeError, msg
out = result.communicate()
(stdout, stderr) = (out[0], out[1])
msg = "Command stdout was: %s, stderr was: %s" % (stdout, stderr)
self.log.debug(msg)
data = []
# Errors we know about
if "Volume group \"%s\" not found" % self.vg_name in stderr:
msg = "Volume group '%s' was not found." % self.vg_name
raise error.NotFound(msg)
elif "logical volume(s) not found" in stderr:
result = common.process_results(data)
self.log.debug('Result: %s' % result)
return result
elif stderr == "" and stdout == "":
result = common.process_results(data)
self.log.debug('Result: %s' % result)
return result
# Catch unexpected errors
if result.returncode != 0:
msg = "Search command returned non-zero: %s stdout was: %s, stderr was: %s" % \
(result.returncode, stdout, stderr)
raise error.LVMError(msg)
output = stdout.strip()
output = re.compile('\n').split(output)
for item in output:
item = item.strip()
dic = {}
name, size = item.split(':')
dic['lv_size'] = size
dic['lv_name'] = name
data.append(dic)
result = common.process_results(data)
self.log.debug('Result: %s' % result)
return result