Source code for oio.conscience.stats.volume
# Copyright (C) 2015-2017 OpenIO SAS, as part of OpenIO SDS
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from ctypes import CDLL, c_char_p, c_double
from oio.conscience.stats.base import BaseStat
[docs]class VolumeStat(BaseStat):
"""Fetch stats from a local file system volume"""
oio_sys_io_idle = None
oio_sys_space_idle = None
def _load_lib(self, path="liboiocore.so.0"):
"""Load the C library"""
cls = self.__class__
try:
self.logger.debug("Loading C library %s", path)
liboiocore = CDLL(path)
io_idle = liboiocore.oio_sys_io_idle
io_idle.argtypes = [c_char_p]
io_idle.restype = c_double
space_idle = liboiocore.oio_sys_space_idle
space_idle.argtypes = [c_char_p]
space_idle.restype = c_double
cls.oio_sys_io_idle = io_idle
cls.oio_sys_space_idle = space_idle
except OSError:
self.logger.exception("Failed to load %s", path)
[docs] def get_stats(self):
if not self.__class__.oio_sys_space_idle:
self._load_lib()
if not self.__class__.oio_sys_space_idle:
return {}
stats = {"stat.io": 100.0 * self.oio_sys_io_idle(self.volume),
"stat.space": 100.0 * self.oio_sys_space_idle(self.volume),
"tag.vol": self.volume}
return stats