# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
#
# SPDX-License-Identifier: LGPL-3.0-only
#
r"""
Systemd AMP
===========
Monitor the state of the systemd system and service (unit) manager.
How to read the stats
---------------------
active: Number of active units. This is usually a fairly basic way to tell if the
unit has started successfully or not.
loaded: Number of loaded units (unit's configuration has been parsed by systemd).
failed: Number of units with an active failed status.
Source reference: https://www.digitalocean.com/community/tutorials/how-to-use-systemctl-to-manage-systemd-services-and-units
Configuration file example
--------------------------
[amp_systemd]
# Systemd
enable=true
regex=\/usr\/lib\/systemd\/systemd
refresh=60
one_line=true
systemctl_cmd=/usr/bin/systemctl --plain
"""
from subprocess import check_output, CalledProcessError
from glances.logger import logger
from glances.compat import iteritems, to_ascii
from glances.amps.glances_amp import GlancesAmp
class Amp(GlancesAmp):
"""Glances' Systemd AMP."""
NAME = 'Systemd'
VERSION = '1.0'
DESCRIPTION = 'Get services list from systemctl (systemd)'
AUTHOR = 'Nicolargo'
EMAIL = 'contact@nicolargo.com'
# def __init__(self, args=None):
# """Init the AMP."""
# super(Amp, self).__init__(args=args)
def update(self, process_list):
"""Update the AMP"""
# Get the systemctl status
logger.debug('{}: Update stats using systemctl {}'.format(self.NAME, self.get('systemctl_cmd')))
try:
res = check_output(self.get('systemctl_cmd').split())
except (OSError, CalledProcessError) as e:
logger.debug('{}: Error while executing systemctl ({})'.format(self.NAME, e))
else:
status = {}
# For each line
for r in to_ascii(res).split('\n')[1:-8]:
# Split per space .*
column = r.split()
if len(column) > 3:
# load column
for c in range(1, 3):
try:
status[column[c]] += 1
except KeyError:
status[column[c]] = 1
# Build the output (string) message
output = 'Services\n'
for k, v in iteritems(status):
output += '{}: {}\n'.format(k, v)
self.set_result(output, separator=' ')
return self.result()
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