SystemD Status Überwachung
Ich habe neulich eine alte Idee wieder hervorgeholt und ein wenig aufpoliert. Wer Server - oder generell Rechner - mit einer Vielzahl von SystemD-Service-Units am Start hat und bereits einige Aspekte davon per Telegraf, Influx und Grafana überwacht könnte daraus vielleicht ebenfalls Nutzen ziehen:
Ich habe dafür ein kleines Python-Skript geschrieben, das den Status von SystemD-Service-Units ausliest. Voraussetzung ist Python in der Version 3 und die Library parsedatetime - eventuell zu installieren mitels pip3 install parsedatetime
#! /usr/bin/env python
# Getting SystemD services status and uptime
# Alexey Nizhegolenko 2018
import os
import re
import json
import subprocess
import configparser
import parsedatetime
from datetime import datetime
def service_stat(service):
out = subprocess.Popen(["systemctl", "status", service], stdout=subprocess.PIPE) # NOQA
output, err = out.communicate()
service_regx = r"Loaded:.*\/([^ ]*);"
status_regx = r"Active:(.*) since (.*);(.*)"
status_regx_fail = r"Active:(.*) ([^ ]+) since (.*);(.*)"
service_status = {}
for line in output.splitlines():
# Match string like: name.service - Some Application Decription
service_search = re.search(service_regx, line.decode('utf-8'))
if service_search:
service_status['service'] = service_search.group(1)
continue
# Match string like: Active: inactive (dead) since Wed 2018-09-19 10:57:30 EEST; 4min 26s ago # NOQA
status_search = re.search(status_regx, line.decode('utf-8'))
status_search_f = re.search(status_regx_fail, line.decode('utf-8'))
if status_search:
status = status_search.group(1).strip()
status_fail = status_search_f.group(1).strip()
if status == 'active (running)':
service_status['status'] = 1
elif status == 'inactive (dead)':
service_status['status'] = 3
elif status_fail == 'failed':
service_status['status'] = 4
else:
service_status['status'] = 0
# Get and convert "since" date in to seconds
since_date = status_search.group(2).strip()
cal = parsedatetime.Calendar()
time_struct, parse_status = cal.parse(since_date)
delta = datetime.now() - datetime(*time_struct[:6])
seconds = delta.total_seconds()
service_status['status_time'] = int(seconds)
break
return service_status
if __name__ == '__main__':
def main():
os.environ["LC_ALL"] = "C"
# Getting params from config
pwd = os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
config = configparser.ConfigParser()
config.read('%s/services_settings.ini' % pwd)
services = config.get('SERVICES', 'name').split()
# Run loop with service63s
output = []
for name in services:
output.append(service_stat(name))
print(json.dumps(output))
try:
main()
except KeyboardInterrupt:
os.system('clear')
Das Skript benötigt noch eine Information dazu, welche der vielen Service-Units genau überwacht werden sollen. Eine Liste der möglichen Kandidaten kann man mittels erhalten, die benötigte ini-Datei könnte dann zum Beispiel wie folgt aussehen:
[SERVICES]
name = atd.service blinkstickmqtt.service cron.service hd-idle.service hddtemp.service iscsid.service libvirtd.service
Diese Daten werden durch das Skript so aufbereitet, dass sie über Telegraf erfasst werden können - dazu benütigt man lediglich die Definition eines exex-input wie im folgenden Beispiel:
[[inputs.exec]]
commands = [ "python /opt/telegraf/service.py" ]
name_override = "services_stats"
timeout = "10s"
tag_keys = ["service"]
data_format = "json"
Zusammen mit dem entsprechenden Grafana-Dashboard kann man dann eine Visualisierung wie zum Beispiel diese hier erstellen (JSON des Dashboards für den Import am Ende dieses Artikels...
Beispiel-Dashboard zur Überwachung von SystemD-Service-Units
{
"annotations": {
"list": [
{
"builtIn": 1,
"datasource": {
"type": "datasource",
"uid": "grafana"
},
"enable": true,
"hide": true,
"iconColor": "rgba(0, 211, 255, 1)",
"name": "Annotations & Alerts",
"target": {
"limit": 100,
"matchAny": false,
"tags": [],
"type": "dashboard"
},
"type": "dashboard"
}
]
},
"description": "SystemD services status dashboard for the python script for Telegraf exec plugin.",
"editable": true,
"fiscalYearStartMonth": 0,
"gnetId": 8348,
"graphTooltip": 0,
"id": 71,
"links": [],
"liveNow": false,
"panels": [
{
"collapsed": false,
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"gridPos": {
"h": 1,
"w": 24,
"x": 0,
"y": 0
},
"id": 6,
"panels": [],
"repeat": "host",
"repeatDirection": "h",
"targets": [
{
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"refId": "A"
}
],
"title": "Status $host",
"type": "row"
},
{
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"fieldConfig": {
"defaults": {
"color": {
"mode": "thresholds"
},
"mappings": [
{
"options": {
"0": {
"index": 0,
"text": "N/A"
},
"1": {
"index": 1,
"text": "UP"
},
"3": {
"index": 2,
"text": "Down"
},
"4": {
"index": 3,
"text": "FAIL"
}
},
"type": "value"
},
{
"options": {
"match": "null",
"result": {
"color": "dark-red",
"index": 4
}
},
"type": "special"
}
],
"thresholds": {
"mode": "absolute",
"steps": [
{
"color": "rgb(0, 0, 0)",
"value": null
},
{
"color": "#508642",
"value": 1
},
{
"color": "#bf1b00",
"value": 3
}
]
},
"unit": "none"
},
"overrides": []
},
"gridPos": {
"h": 3,
"w": 3,
"x": 0,
"y": 1
},
"id": 2,
"links": [],
"maxDataPoints": 100,
"maxPerRow": 8,
"options": {
"colorMode": "background",
"graphMode": "none",
"justifyMode": "auto",
"orientation": "horizontal",
"reduceOptions": {
"calcs": [
"lastNotNull"
],
"fields": "",
"values": false
},
"textMode": "auto"
},
"pluginVersion": "9.3.2",
"repeat": "service",
"repeatDirection": "h",
"targets": [
{
"alias": "$service",
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"groupBy": [],
"measurement": "services_stats",
"orderByTime": "ASC",
"policy": "default",
"refId": "A",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"status"
],
"type": "field"
}
]
],
"tags": [
{
"key": "host",
"operator": "=~",
"value": "/^$host$/"
},
{
"condition": "AND",
"key": "service",
"operator": "=~",
"value": "/^$service$/"
}
]
}
],
"title": "$service",
"type": "stat"
},
{
"collapsed": true,
"gridPos": {
"h": 1,
"w": 24,
"x": 0,
"y": 7
},
"id": 60,
"panels": [],
"title": "Status time $host",
"type": "row"
},
{
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"fieldConfig": {
"defaults": {
"color": {
"mode": "thresholds"
},
"decimals": 1,
"mappings": [
{
"options": {
"match": "null",
"result": {
"text": "N/A"
}
},
"type": "special"
}
],
"thresholds": {
"mode": "absolute",
"steps": [
{
"color": "green",
"value": null
},
{
"color": "red",
"value": 80
}
]
},
"unit": "s"
},
"overrides": []
},
"gridPos": {
"h": 3,
"w": 3,
"x": 0,
"y": 8
},
"id": 4,
"links": [],
"maxDataPoints": 100,
"maxPerRow": 8,
"options": {
"colorMode": "none",
"graphMode": "none",
"justifyMode": "auto",
"orientation": "horizontal",
"reduceOptions": {
"calcs": [
"lastNotNull"
],
"fields": "",
"values": false
},
"textMode": "auto"
},
"pluginVersion": "9.3.2",
"repeat": "service",
"repeatDirection": "h",
"targets": [
{
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"groupBy": [],
"measurement": "services_stats",
"orderByTime": "ASC",
"policy": "default",
"refId": "A",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"status_time"
],
"type": "field"
},
{
"params": [],
"type": "last"
}
]
],
"tags": [
{
"key": "host",
"operator": "=~",
"value": "/^$host$/"
},
{
"condition": "AND",
"key": "service",
"operator": "=~",
"value": "/^$service$/"
}
]
}
],
"title": "$service",
"type": "stat"
},
{
"collapsed": false,
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"gridPos": {
"h": 1,
"w": 24,
"x": 0,
"y": 14
},
"id": 28,
"panels": [],
"targets": [
{
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"refId": "A"
}
],
"title": "Status table $host",
"type": "row"
},
{
"activePatternIndex": 1,
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"debug_mode": false,
"defaultPattern": {
"bgColors": "green|orange|red",
"col_name": "Value",
"decimals": 2,
"delimiter": ".",
"enable_bgColor": false,
"enable_time_based_thresholds": false,
"enable_transform": false,
"filter": {
"value_above": "",
"value_below": ""
},
"format": "none",
"null_color": "darkred",
"null_value": "No data",
"row_name": "_series_",
"thresholds": "70,90",
"time_based_thresholds": [],
"transform_values": "_value_|_value_|_value_",
"valueName": "avg"
},
"default_title_for_rows": "Metric",
"gridPos": {
"h": 11,
"w": 24,
"x": 0,
"y": 15
},
"id": 32,
"links": [],
"nullPointMode": "connected",
"patterns": [
{
"bgColors": "black|green|red",
"col_name": "_1_",
"decimals": 2,
"delimiter": ".",
"enable_bgColor": true,
"enable_time_based_thresholds": false,
"enable_transform": true,
"filter": {
"value_above": "",
"value_below": ""
},
"format": "none",
"name": "state",
"null_color": "darkred",
"null_value": "No data",
"pattern": "Influx.status_enum.*$",
"row_name": "_2_",
"thresholds": "1,3",
"time_based_thresholds": [],
"transform_values": "N/A|UP|?|DOWN|FAIL",
"valueName": "current"
},
{
"bgColors": "black|green|red",
"col_name": "_1_",
"decimals": 2,
"delimiter": ".",
"enable_bgColor": false,
"enable_time_based_thresholds": false,
"enable_transform": false,
"filter": {
"value_above": "",
"value_below": ""
},
"format": "s",
"name": "time",
"null_color": "darkred",
"null_value": "No data",
"pattern": "Influx.status_time.*$",
"row_name": "_2_",
"thresholds": "1,3",
"time_based_thresholds": [],
"transform_values": "N/A|UP|?|DOWN|FAIL",
"valueName": "current"
}
],
"plugin_title": "Boom Table",
"row_col_wrapper": "_",
"sorting_props": {
"col_index": -1,
"direction": "desc"
},
"targets": [
{
"alias": "Influx.status_enum.$tag_service",
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"service"
],
"type": "tag"
}
],
"measurement": "services_stats",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT \"status\" FROM \"services_stats\" WHERE (\"host\" = 'klapauzius' AND \"service\" = 'nfs-kernel-server') AND $timeFilter",
"rawQuery": false,
"refId": "K",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"status"
],
"type": "field"
},
{
"params": [],
"type": "last"
}
]
],
"tags": [
{
"key": "host",
"operator": "=",
"value": "klapauzius"
}
]
},
{
"alias": "Influx.status_time.$tag_service",
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"groupBy": [
{
"params": [
"$__interval"
],
"type": "time"
},
{
"params": [
"service"
],
"type": "tag"
}
],
"measurement": "services_stats",
"orderByTime": "ASC",
"policy": "default",
"query": "SELECT \"status\" FROM \"services_stats\" WHERE (\"host\" = 'klapauzius' AND \"service\" = 'nfs-kernel-server') AND $timeFilter",
"rawQuery": false,
"refId": "A",
"resultFormat": "time_series",
"select": [
[
{
"params": [
"status_time"
],
"type": "field"
},
{
"params": [],
"type": "last"
}
]
],
"tags": [
{
"key": "host",
"operator": "=",
"value": "klapauzius"
}
]
}
],
"title": "Services",
"type": "yesoreyeram-boomtable-panel"
}
],
"refresh": "30s",
"schemaVersion": 37,
"style": "dark",
"tags": [],
"templating": {
"list": [
{
"current": {
"selected": false,
"text": "nanopineo3",
"value": "nanopineo3"
},
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"definition": "SHOW TAG VALUES FROM \"services_stats\" WITH KEY = \"host\"",
"hide": 0,
"includeAll": false,
"multi": false,
"name": "host",
"options": [],
"query": "SHOW TAG VALUES FROM \"services_stats\" WITH KEY = \"host\"",
"refresh": 1,
"regex": "",
"skipUrlSync": false,
"sort": 0,
"tagValuesQuery": "",
"tagsQuery": "",
"type": "query",
"useTags": false
},
{
"current": {
"selected": true,
"text": [
"All"
],
"value": [
"$__all"
]
},
"datasource": {
"type": "influxdb",
"uid": "000000001"
},
"definition": "SHOW TAG VALUES FROM \"services_stats\" WITH KEY = \"service\" WHERE host = '$host' ",
"hide": 0,
"includeAll": true,
"multi": true,
"name": "service",
"options": [],
"query": "SHOW TAG VALUES FROM \"services_stats\" WITH KEY = \"service\" WHERE host = '$host' ",
"refresh": 1,
"regex": "",
"skipUrlSync": false,
"sort": 0,
"tagValuesQuery": "",
"tagsQuery": "",
"type": "query",
"useTags": false
}
]
},
"time": {
"from": "now-1h",
"to": "now"
},
"timepicker": {
"refresh_intervals": [
"5s",
"10s",
"30s",
"1m",
"5m",
"15m",
"30m",
"1h",
"2h",
"1d"
],
"time_options": [
"5m",
"15m",
"1h",
"6h",
"12h",
"24h",
"2d",
"7d",
"30d"
]
},
"timezone": "",
"title": "SytemD Services Status",
"uid": "6wtmoQJmk",
"version": 12,
"weekStart": ""
}
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