111 lines
2.6 KiB
Python
111 lines
2.6 KiB
Python
#!/usr/bin/env python3
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# pylint: disable=invalid-name
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# pylint: enable=invalid-name
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"""Munin plugin to monitor systemd service status.
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=head1 NAME
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systemd_status - monitor systemd service status, including normal services,
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mounts, hotplugs and socket activations
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=head1 APPLICABLE SYSTEMS
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Linux systems with systemd installed.
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=head1 CONFIGURATION
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No configuration is required for this plugin.
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Warning level for systemd "failed" state is set to 0:0. If any of the services
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enters "failed" state, Munin will emit warning.
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=head1 AUTHOR
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Kim B. Heino <b@bbbs.net>
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=head1 LICENSE
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GPLv2
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=head1 MAGIC MARKERS
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#%# family=auto
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#%# capabilities=autoconf
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=cut
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"""
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import os
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import re
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import subprocess
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import sys
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STATES = (
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'failed',
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'dead',
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'running',
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'exited',
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'active',
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'listening',
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'waiting',
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'plugged',
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'mounted',
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)
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def config():
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"""Autoconfig values."""
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print('graph_title systemd services')
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print('graph_vlabel Services')
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print('graph_category processes')
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print('graph_args --base 1000 --lower-limit 0')
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print('graph_scale no')
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print('graph_info Number of services in given activation state.')
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for state in STATES:
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print('{state}.label Services in {state} state'.format(state=state))
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print('failed.warning 0:0')
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if os.environ.get('MUNIN_CAP_DIRTYCONFIG') == '1':
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fetch()
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def fetch():
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"""Print runtime values."""
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# Get data
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try:
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# deb9/py3.5 doesn't have encoding parameter in subprocess
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output = subprocess.check_output(['/bin/systemctl', 'list-units'])
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except (OSError, subprocess.CalledProcessError):
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return
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output = output.decode('utf-8', 'ignore')
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# Parse data
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states = {state: 0 for state in STATES}
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for line in output.splitlines():
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token = line.split()
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if len(token) < 4:
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continue
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if len(token[0]) < 3: # Skip failed-bullet
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token = token[1:]
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if token[0].endswith('.scope'):
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continue # Ignore scopes
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if re.match(r'user.*@\d+\.service', token[0]):
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continue # These fail randomly in older systemd
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if token[3] in states:
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states[token[3]] = states[token[3]] + 1
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# Output
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for state in STATES:
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print('{}.value {}'.format(state, states[state]))
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if __name__ == '__main__':
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if len(sys.argv) > 1 and sys.argv[1] == 'autoconf':
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print('yes' if os.path.exists('/run/systemd/system') else
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'no (systemd is not running)')
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elif len(sys.argv) > 1 and sys.argv[1] == 'config':
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config()
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else:
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fetch()
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