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# -*- coding: utf-8 -*-
# Description: mdstat netdata python.d module
# Author: Ilya Mashchenko (l2isbad)
# SPDX-License-Identifier: GPL-3.0-or-later
import re
from collections import defaultdict
from bases.FrameworkServices.SimpleService import SimpleService
MDSTAT = '/proc/mdstat'
MISMATCH_CNT = '/sys/block/{0}/md/mismatch_cnt'
ORDER = ['mdstat_health']
CHARTS = {
'mdstat_health': {
'options': [None, 'Faulty Devices In MD', 'failed disks', 'health', 'md.health', 'line'],
'lines': []
}
}
RE_DISKS = re.compile(r' (?P<array>[a-zA-Z_0-9]+) : active .+\['
r'(?P<total_disks>[0-9]+)/'
r'(?P<inuse_disks>[0-9]+)\]')
RE_STATUS = re.compile(r' (?P<array>[a-zA-Z_0-9]+) : active .+ '
r'(?P<operation>[a-z]+) =[ ]{1,2}'
r'(?P<operation_status>[0-9.]+).+finish='
r'(?P<finish_in>([0-9.]+))min speed='
r'(?P<speed>[0-9]+)')
def md_charts(name):
order = [
'{0}_disks'.format(name),
'{0}_operation'.format(name),
'{0}_mismatch_cnt'.format(name),
'{0}_finish'.format(name),
'{0}_speed'.format(name)
]
charts = dict()
charts[order[0]] = {
'options': [None, 'Disks Stats', 'disks', name, 'md.disks', 'stacked'],
'lines': [
['{0}_total_disks'.format(name), 'total', 'absolute'],
['{0}_inuse_disks'.format(name), 'inuse', 'absolute']
]
}
charts[order[1]] = {
'options': [None, 'Current Status', 'percent', name, 'md.status', 'line'],
'lines': [
['{0}_resync'.format(name), 'resync', 'absolute', 1, 100],
['{0}_recovery'.format(name), 'recovery', 'absolute', 1, 100],
['{0}_reshape'.format(name), 'reshape', 'absolute', 1, 100],
['{0}_check'.format(name), 'check', 'absolute', 1, 100],
]
}
charts[order[2]] = {
'options': [None, 'Mismatch Count', 'unsynchronized blocks', name, 'md.mismatch_cnt', 'line'],
'lines': [
['{0}_mismatch_cnt'.format(name), 'count', 'absolute']
]
}
charts[order[3]] = {
'options': [None, 'Approximate Time Until Finish', 'seconds', name, 'md.rate', 'line'],
'lines': [
['{0}_finish_in'.format(name), 'finish in', 'absolute', 1, 1000]
]
}
charts[order[4]] = {
'options': [None, 'Operation Speed', 'KB/s', name, 'md.rate', 'line'],
'lines': [
['{0}_speed'.format(name), 'speed', 'absolute', 1, 1000]
]
}
return order, charts
class MD:
def __init__(self, raw_data):
self.name = raw_data['array']
self.d = raw_data
def data(self):
rv = {
'total_disks': self.d['total_disks'],
'inuse_disks': self.d['inuse_disks'],
'health': int(self.d['total_disks']) - int(self.d['inuse_disks']),
'resync': 0,
'recovery': 0,
'reshape': 0,
'check': 0,
'finish_in': 0,
'speed': 0,
}
v = read_lines(MISMATCH_CNT.format(self.name))
if v:
rv['mismatch_cnt'] = v
if self.d.get('operation'):
rv[self.d['operation']] = float(self.d['operation_status']) * 100
rv['finish_in'] = float(self.d['finish_in']) * 1000 * 60
rv['speed'] = float(self.d['speed']) * 1000
return dict(('{0}_{1}'.format(self.name, k), v) for k, v in rv.items())
class Service(SimpleService):
def __init__(self, configuration=None, name=None):
SimpleService.__init__(self, configuration=configuration, name=name)
self.order = ORDER
self.definitions = CHARTS
self.mds = list()
@staticmethod
def get_mds():
raw = read_lines(MDSTAT)
if not raw:
return None
return find_mds(raw)
def get_data(self):
"""
Parse data from _get_raw_data()
:return: dict
"""
mds = self.get_mds()
if not mds:
return None
data = dict()
for md in mds:
if md.name not in self.mds:
self.mds.append(md.name)
self.add_new_md_charts(md.name)
data.update(md.data())
return data
def check(self):
if not self.get_mds():
self.error('Failed to read data from {0} or there is no active arrays'.format(MDSTAT))
return False
return True
def add_new_md_charts(self, name):
order, charts = md_charts(name)
self.charts['mdstat_health'].add_dimension(['{0}_health'.format(name), name])
for chart_name in order:
params = [chart_name] + charts[chart_name]['options']
dims = charts[chart_name]['lines']
chart = self.charts.add_chart(params)
for dim in dims:
chart.add_dimension(dim)
def find_mds(raw_data):
data = defaultdict(str)
counter = 1
for row in (elem.strip() for elem in raw_data):
if not row:
counter += 1
continue
data[counter] = ' '.join([data[counter], row])
mds = list()
for v in data.values():
m = RE_DISKS.search(v)
if not m:
continue
d = m.groupdict()
m = RE_STATUS.search(v)
if m:
d.update(m.groupdict())
mds.append(MD(d))
return sorted(mds, key=lambda md: md.name)
def read_lines(path):
try:
with open(path) as f:
return f.readlines()
except (IOError, OSError):
return None
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