python-rrdtool
阅读原文时间:2023年07月12日阅读:5

https://nagios-plugins.org/doc/guidelines.html

nagios检测信息

host

GPING OK – rtt min/avg/max/mdev = 0.897/0.897/0.897/0.000 ms|time=0.897ms;20;40;; ok=1

service

cpu_user:OK-0% cpu_system:OK-0% cpu_idle:WARNING-99>70% | cpu_user=0%;120;90; cpu_system=0%;100;70; cpu_idle=99%;100;70;

其中性能数据为|后面的斜体部分,格式如下:

'label'=value[UOM];[warn];[crit];[min];[max]

注意事项

1.空格分割标签/值对 例如cpu_user=0%;100;90; cpu_system=0%;100;70; cpu_idle=99%;100;70;

2.label可以包含任何字符

3.单引号可省略,如果label中使用空格、等号和单引号,则需要需要单引号把label括起来。例如’a ‘b’ = c’=0%;100;90;

4.标签可以为任意长度,但最好少于19个字符并且唯一,(RRD有相关方面的限制),并且需要注意NRPE的返回值的限制(译者:好像是4K限制)

5.两个单引号为指定的转义字符?

6.warn, crit, min or max 可以为空(比如,如果没有定义阀值,最大最小值则不适用)并且最后的分号可以省略

7.如果UOM为%,则不需要最大最小值

8.value, min and max只能为负号“-” “0到9” 和小数点“.” 并且单位必须统一 例如:cpu_user=0.5%;99.9;-9;

9.warn and crit必须在某个区间格式,参见2.5章。单位也必须统一

10.UOM必须为以下其中之一

如果未指定,默认为数字(整数和浮点数)(比如用户数,进程数,负载等)

s - 秒 (可以为纳秒us或毫秒ms) cpu_user=0s;100;90; cpu_system=0us;100;70; cpu_idle=0ms;100;70;

% - 百分号 cpu_user=0%;100;90; cpu_system=0%;100;70; cpu_idle=99%;100;70;

B - 字节(可以是KB MB GB TB)cpu_user=0KB;100;90; cpu_system=0MB;100;70; cpu_idle=0B;100;70;

C - 一个计数器 (比如网卡的流量)cpu_user=10c;100;90;

rrdtool 1.4.8以下有bug,会提示'rrdtool.create(rrdfile, '--step', '60', '--start', '-1y', dss, rra) TypeError: argument 5 must be string'

必须升级高版本,用下面这个源 gf-plus

yum install http://mirror.symnds.com/distributions/gf/el/6/gf/x86_64/gf-release-6-10.gf.el6.noarch.rpm

#!/usr/bin/env python
# -*- encoding: utf-8 -*-

from flask import Blueprint, render_template, url_for, redirect
import os, re, time, json, rrdtool

mod = Blueprint('graph', __name__, template_folder='templates')

@mod.route('/', methods=['GET'])
def show_graph():
    # hostname, service get from db
    hostname = 'wx-j2-5-52'
    services = [ \
        'linux_connections', \
        'linux_diskio_sda1', \
        'linux_disk_opt', \
        'linux_load', \
        'linux_traffic_p1p1', \
        'linux_cpu', \
        'linux_diskio_sda3', \
        'linux_disk_root', \
        'linux_memory', \
        'host_icmp' \
    ]

    return render_template('graph.html', hostname=hostname, services=sorted(services))

# Function create rrd
def create_rrd(rrd_file, perfdata):
    ds = []
    for label, value, unit in perfdata:
        if unit in ['b/s', 'B', 'B/s', 's', 'ms', '']:
            ds.append('DS:' + str(label) + ':GAUGE:600:0:1000000000000')
        elif unit in ['%']:
            ds.append('DS:' + str(label) + ':GAUGE:600:0:100')

    rra = [
        'RRA:AVERAGE:0.5:1:120',        # hour
        'RRA:AVERAGE:0.5:5:600',        # day
        'RRA:AVERAGE:0.5:30:700',      # week
        'RRA:AVERAGE:0.5:120:800',     # month
        'RRA:AVERAGE:0.5:1440:800',     # year
        'RRA:MAX:0.5:1:120',        # hour
        'RRA:MAX:0.5:5:600',        # day
        'RRA:MAX:0.5:30:700',      # week
        'RRA:MAX:0.5:120:800',     # month
        'RRA:MAX:0.5:1440:800',     # year
        'RRA:MIN:0.5:1:120',        # hour
        'RRA:MIN:0.5:5:600',        # day
        'RRA:MIN:0.5:30:700',      # week
        'RRA:MIN:0.5:120:800',     # month
        'RRA:MIN:0.5:1440:800',     # year
    ]

    rrdtool.create(str(rrd_file), '--step', '60', ds, rra)

# Function update rrd
def update_rrd(info):
    rrd_path = os.path.join('/opt/rrd', 'wx', 'j2', info['host'])
    if not os.path.exists(rrd_path):
        os.mkdir(rrd_path)

    if info['type'] == 'host':
        rrd_file = os.path.join(rrd_path, 'host_icmp') + '.rrd'
    else:
        rrd_file = os.path.join(rrd_path, info['service']) + '.rrd'

    # perfdata:
    # rta=36.370ms;500.000;500.000;0; pl=0%;80;80;; rtmax=38.344ms;;;; rtmin=34.979ms;;;;
    # or
    # 'cached'=21857640448;;;0; 'buffer'=129105920;;;0; 'used'=1640251392;0.00:31974134374.40;0.00:31974134374.40;0;33656983552

    perfdata = []
    for entry in info['perfdata'].split(' '):
        m = re.match("^\'?([\w\s]+)\'?=(\d+\.?\d*)(\D*)$", entry.split(';')[0])
        perfdata.append((m.group(1), m.group(2), m.group(3)))

    if not os.path.exists(rrd_file):
        create_rrd(rrd_file, perfdata)

    ds = ':'.join([ label for label, value, unit in perfdata])
    rra = ':'.join([ value for label, value, unit in perfdata])

    print rrd_file, ds, rra
    rrdtool.update(str(rrd_file), '--template', str(ds), 'N:'+str(rra))

# Function fetch rrd
def fetch_rrd(hostname, service, period):
    rrd_path = os.path.join('/opt/rrd', 'wx', 'j2', hostname)
    #rrd_path = os.path.join('/home/ken/mule', hostname)
    rrd_file = rrd_path + '/' + service + '.rrd'

    return rrdtool.fetch(str(rrd_file), 'AVERAGE', '--start', str(period))

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