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# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
#
# SPDX-License-Identifier: LGPL-3.0-only
#
"""RAID plugin."""
from glances.compat import iterkeys
from glances.logger import logger
from glances.plugins.glances_plugin import GlancesPlugin
# Import plugin specific dependency
try:
from pymdstat import MdStat
except ImportError as e:
import_error_tag = True
logger.warning("Missing Python Lib ({}), Raid plugin is disabled".format(e))
else:
import_error_tag = False
class Plugin(GlancesPlugin):
"""Glances RAID plugin.
stats is a dict (see pymdstat documentation)
"""
def __init__(self, args=None, config=None):
"""Init the plugin."""
super(Plugin, self).__init__(args=args, config=config)
# We want to display the stat in the curse interface
self.display_curse = True
@GlancesPlugin._check_decorator
@GlancesPlugin._log_result_decorator
def update(self):
"""Update RAID stats using the input method."""
# Init new stats
stats = self.get_init_value()
if import_error_tag:
return self.stats
if self.input_method == 'local':
# Update stats using the PyMDstat lib (https://github.com/nicolargo/pymdstat)
try:
# Just for test
# mds = MdStat(path='/home/nicolargo/dev/pymdstat/tests/mdstat.10')
mds = MdStat()
stats = mds.get_stats()['arrays']
except Exception as e:
logger.debug("Can not grab RAID stats (%s)" % e)
return self.stats
elif self.input_method == 'snmp':
# Update stats using SNMP
# No standard way for the moment...
pass
# Update the stats
self.stats = stats
return self.stats
def msg_curse(self, args=None, max_width=None):
"""Return the dict to display in the curse interface."""
# Init the return message
ret = []
# Only process if stats exist...
if not self.stats or self.is_disabled():
return ret
# Max size for the interface name
name_max_width = max_width - 12
# Header
msg = '{:{width}}'.format('RAID disks', width=name_max_width)
ret.append(self.curse_add_line(msg, "TITLE"))
msg = '{:>7}'.format('Used')
ret.append(self.curse_add_line(msg))
msg = '{:>7}'.format('Avail')
ret.append(self.curse_add_line(msg))
# Data
arrays = sorted(iterkeys(self.stats))
for array in arrays:
# New line
ret.append(self.curse_new_line())
# Display the current status
status = self.raid_alert(
self.stats[array]['status'],
self.stats[array]['used'],
self.stats[array]['available'],
self.stats[array]['type'],
)
# Data: RAID type name | disk used | disk available
array_type = self.stats[array]['type'].upper() if self.stats[array]['type'] is not None else 'UNKNOWN'
# Build the full name = array type + array name
full_name = '{} {}'.format(array_type, array)
msg = '{:{width}}'.format(full_name, width=name_max_width)
ret.append(self.curse_add_line(msg))
if self.stats[array]['type'] == 'raid0' and self.stats[array]['status'] == 'active':
msg = '{:>7}'.format(len(self.stats[array]['components']))
ret.append(self.curse_add_line(msg, status))
msg = '{:>7}'.format('-')
ret.append(self.curse_add_line(msg, status))
elif self.stats[array]['status'] == 'active':
msg = '{:>7}'.format(self.stats[array]['used'])
ret.append(self.curse_add_line(msg, status))
msg = '{:>7}'.format(self.stats[array]['available'])
ret.append(self.curse_add_line(msg, status))
elif self.stats[array]['status'] == 'inactive':
ret.append(self.curse_new_line())
msg = '└─ Status {}'.format(self.stats[array]['status'])
ret.append(self.curse_add_line(msg, status))
components = sorted(iterkeys(self.stats[array]['components']))
for i, component in enumerate(components):
if i == len(components) - 1:
tree_char = '└─'
else:
tree_char = '├─'
ret.append(self.curse_new_line())
msg = ' {} disk {}: '.format(tree_char, self.stats[array]['components'][component])
ret.append(self.curse_add_line(msg))
msg = '{}'.format(component)
ret.append(self.curse_add_line(msg))
if self.stats[array]['type'] != 'raid0' and (self.stats[array]['used'] < self.stats[array]['available']):
# Display current array configuration
ret.append(self.curse_new_line())
msg = '└─ Degraded mode'
ret.append(self.curse_add_line(msg, status))
if len(self.stats[array]['config']) < 17:
ret.append(self.curse_new_line())
msg = ' └─ {}'.format(self.stats[array]['config'].replace('_', 'A'))
ret.append(self.curse_add_line(msg))
return ret
def raid_alert(self, status, used, available, type):
"""RAID alert messages.
[available/used] means that ideally the array may have _available_
devices however, _used_ devices are in use.
Obviously when used >= available then things are good.
"""
if type == 'raid0':
return 'OK'
if status == 'inactive':
return 'CRITICAL'
if used is None or available is None:
return 'DEFAULT'
elif used < available:
return 'WARNING'
return 'OK'