check_systemd_timer: parse cli output instead, more perfdta
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d32092c62f
commit
efc3c010f9
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@ -2,18 +2,61 @@
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import argparse
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import sys
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import time
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import traceback
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from datetime import datetime, timedelta
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import humanize
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from dateutil import tz
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from checker import nagios
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from checker.humanfriendly import parse_systemctl_time_delta
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from checker.result import quit_check
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sys.path.insert(0, "/usr/lib/python3/dist-packages")
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import dbus
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import re
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import subprocess
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from datetime import datetime
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import humanfriendly
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SYSTEMCTL_TIMERS_RE = re.compile(
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r'^([A-Za-z]*\s[0-9]{4}-[0-9]{2}-[0-9]{2}\s*[0-9]{2}:[0-9]{2}:[0-9]{2}\s[A-Z]*)\s*(([0-9]*[a-z]*\s)*left)\s*([A-Za-z]*\s[0-9]{4}-[0-9]{2}-[0-9]{2}\s[0-9]{2}:[0-9]{2}:[0-9]{2}\s[A-Z]*)\s*([0-9A-Za-z\s]*\sago)\s*([A-Za-z\-_]*.timer)\s*([A-Za-z\-_]*.service)')
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def get_next_elapse(timer_name):
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try:
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output = subprocess.check_output(["systemctl", "list-timers", "--all"], universal_newlines=True)
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lines = output.split('\n')
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for line in lines:
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if timer_name in line:
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parts = re.search(SYSTEMCTL_TIMERS_RE, line)
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try:
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datetime_object = datetime.strptime(parts.group(1), '%a %Y-%m-%d %H:%M:%S %Z')
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except ValueError as e:
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return None, e
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time_left = parse_systemctl_time_delta(parts.group(2))
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if isinstance(time_left, humanfriendly.InvalidTimespan):
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return None, humanfriendly.InvalidTimespan
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time_passed = parse_systemctl_time_delta(parts.group(5))
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if isinstance(time_passed, humanfriendly.InvalidTimespan):
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return None, humanfriendly.InvalidTimespan
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timer_info = {
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'next': datetime_object,
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'left': time_left,
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'last': parts.group(4),
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'passed': time_passed,
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'unit': parts.group(6),
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'activates': parts.group(7)
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}
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return timer_info, None
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return None, ValueError('Timer not found')
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except subprocess.CalledProcessError as e:
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return None, e
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def check_timer(timer_name):
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if not timer_name.endswith('.timer'):
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@ -28,31 +71,32 @@ def check_timer(timer_name):
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timer_properties = dbus.Interface(timer_unit, 'org.freedesktop.DBus.Properties')
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active_state = timer_properties.Get('org.freedesktop.systemd1.Unit', 'ActiveState')
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if active_state == 'active':
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next_elapse = timer_properties.Get('org.freedesktop.systemd1.Timer', 'NextElapseUSecRealtime')
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next_elapse, err = get_next_elapse(timer_name)
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if err:
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quit_check(f'{err}', nagios.STATE_UNKNOWN)
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try:
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local_timezone_offset_seconds = time.localtime().tm_gmtoff
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local_timezone_offset = timedelta(seconds=local_timezone_offset_seconds)
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local_datetime = datetime.utcfromtimestamp(int(next_elapse) / 1e6) + local_timezone_offset
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next_elapse_str = local_datetime.strftime("%m-%d-%Y %H:%M")
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except ValueError as v_err:
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if 'is out of range' in repr(v_err):
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# This occurs whenever the timer resets.
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# "year 586524 is out of range"
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print(f'OK - {timer_name} has triggered.')
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sys.exit(nagios.STATE_OK)
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print(next_elapse)
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current_time = time.time() * 1e6 # convert current time to microseconds
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remaining_time_sec = int((next_elapse - current_time) / 1e6) # convert remaining time to seconds
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remaining_time_human = str(humanize.naturaltime(datetime.now() + timedelta(seconds=remaining_time_sec))).strip(' from now')
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if next_elapse['left'] < 0 or next_elapse['passed'] < 0:
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quit_check(f'Timer is negative? Left: {next_elapse["left"]}. Passed: {next_elapse["passed"]}', nagios.STATE_UNKNOWN)
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local_tz = tz.tzlocal()
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next_elapse_str = next_elapse['next'].replace(tzinfo=local_tz).strftime('%a %Y-%m-%d %H:%M %Z')
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remaining_time_human = humanfriendly.format_timespan(next_elapse['left'])
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passed_time_human = humanfriendly.format_timespan(next_elapse['passed'])
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perfdata_dict = {
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'remaining_time': {
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'value': remaining_time_sec,
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'value': int(next_elapse['left']),
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'unit': 's',
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'min': 0
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},
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'passed_time': {
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'value': int(next_elapse['passed']),
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'unit': 's',
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'min': 0
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}
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}
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quit_check(f'{timer_name} is active. Trigger time: {next_elapse_str}. Remaining time: {remaining_time_human}.', nagios.STATE_OK, perfdata_dict)
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quit_check(f'{timer_name} is active. Trigger time: {next_elapse_str}. Remaining time: {remaining_time_human}. Time since last trigger: {passed_time_human}.', nagios.STATE_OK, perfdata_dict)
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else:
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quit_check(f'{timer_name} is not active.', nagios.STATE_CRIT)
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except dbus.exceptions.DBusException:
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@ -0,0 +1,24 @@
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import re
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import humanfriendly
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SYSTEMCTL_TIMESPAN_RE = re.compile(r'([0-9]+((\s[a-z]*)|([a-z]+)))')
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def parse_systemctl_time_delta(time_str: str):
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"""
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https://humanfriendly.readthedocs.io/en/latest/api.html?highlight=parse_timespan#humanfriendly.parse_timespan
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"""
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time_str = time_str.replace(' left', '').replace(' ago', '')
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spans = []
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for part in re.findall(SYSTEMCTL_TIMESPAN_RE, time_str):
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delta = part[0]
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if 'months' in delta:
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# humanfriendly does not support "months" so we convert it to weeks
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num = int(delta.split(' ')[0])
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delta = f'{num * 4} weeks'
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try:
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spans.append(humanfriendly.parse_timespan(delta))
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except humanfriendly.InvalidTimespan as e:
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return e
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return sum(spans)
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@ -11,3 +11,4 @@ zfslib==0.11.0
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hurry.filesize==0.9
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dateparser==1.2.0
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humanize==4.9.0
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humanfriendly==10.0
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