学用py-rrdtool_lgpl

本帖最后由 ljwsy 于 2012-06-28 00:53 编辑 前言 前段时间学习PY，并写了个小脚本用于阻断sshd扫描，工作得很好，但查看统计数据时只能是文本。心中想“如果是图形统计就好了”，图形——自然而然是用cacti了，于是着手做……经过N多努力数据是进了，图形怎么都不出来。这可不能怨谁，哪个让我对rrdtool不熟悉呢……还是先去啃rrdtool吧。又经过N多努力，有点门道了，嘿嘿，大家一起来学吧。 环境 stu# uname -a FreeBSD stu.xxx.cn 9.0-STABLE FreeBSD 9.0-STABLE #0: Fri May 18 22:02:36 CST 2012      ljwsy@stu.xxx.cn:/usr/obj/usr/src/sys/STU  i386 stu# pkg_info | grep python python26-2.6.8      An interpreted object-oriented programming language python31-3.1.5      An interpreted object-oriented programming language stu# pkg_info | grep rrdtool py26-rrdtool_lgpl-1.0b1_2 Python interface to RRDTool, the graphing and logging utili rrdtool-1.4.7_1     Round Robin Database Tools stu# pkg_info | grep apache apache-2.2.22_5     Version 2.2.x of Apache web server with prefork MPM. 目标 监控两台机的温度并绘图。一台是本机，另一台是远程机（snmp数据）。 stu# sysctl -a | /usr/bin/grep hw | grep temper hw.acpi.thermal.tz0.temperature: 49.0C stu# snmpwalk -c public -v 1 fb.xxx.cn .1.3.6.1.4.1.2021.51.101.1 UCD-SNMP-MIB::ucdavis.51.101.1 = STRING: " 46.5" 参考资料 1.Using RRD with Python: short introduction 2.RRDtool简体中文教程 v1.01 建立rrd数据库 create.py #!/usr/local/bin/python import sys import rrdtool ret = rrdtool.create("/usr/local/www/rrdtool/rrd/temperture.rrd", "--step", "300", "--start", '0', "DS:fb:GAUGE:600:U:U", "DS:stu:GAUGE:600:U:U", "RRA:AVERAGE:0.5:1:600", "RRA:AVERAGE:0.5:6:700", "RRA:AVERAGE:0.5:24:775", "RRA:AVERAGE:0.5:288:797", "RRA:MAX:0.5:1:600", "RRA:MAX:0.5:6:700", "RRA:MAX:0.5:24:775", "RRA:MAX:0.5:444:797") if ret: print rrdtool.error() 复制代码 更新数据库 stu# rrdtool fetch rrd/temperture.rrd AVERAGE -s 1340784000                              fb                 stu 1340784300: nan nan 1340784600: nan nan 1340784900: nan nan 1340785200: nan nan 1340785500: nan nan 1340785800: nan nan 1340786100: nan nan 1340786400: nan nan stu# ./update.py stu# rrdtool fetch rrd/temperture.rrd AVERAGE -s 1340784000                              fb                 stu 1340784300: nan nan 1340784600: nan nan 1340784900: nan nan 1340785200: nan nan 1340785500: nan nan 1340785800: nan nan 1340786100: nan nan 1340786400: 4.6699204174e+01 4.7510090197e+01 1340786700: nan nan update.py #!/usr/local/bin/python import sys import time import commands import rrdtool ret="/sbin/sysctl -a | /usr/bin/grep hw | /usr/bin/grep temper" (t,tmp)=commands.getstatusoutput(ret) t=tmp.split() tmp=t[1].split('C')[0] stu=tmp.split('.')[0] ret="/usr/local/bin/snmpwalk -c public -v 1 fb.xxx.cn .1.3.6.1.4.1.2021.51.101.1" (t,tmp)=commands.getstatusoutput(ret) t=tmp.rsplit('"')[1] tmp=t.split()[0] fb=tmp.split('.')[0] tmp='N:%s:%s' % (fb,stu) ret = rrdtool.update('/usr/local/www/rrdtool/rrd/temperture.rrd',tmp) if ret:         print rrdtool.error() exit() 复制代码 有数据更新后，你就可以把update.py放进crontab中让它5分钟跑一次。 绘图 在update.py中添加绘图代码： ret = rrdtool.graph( "/usr/local/www/apache22/data/temperture.png", "--start", "-1d", "--vertical-label=SystemTemperture", "DEF:fb=/usr/local/www/rrdtool/rrd/temperture.rrd:fb:AVERAGE", "DEF:stu=/usr/local/www/rrdtool/rrd/temperture.rrd:stu:AVERAGE", "AREA:fb#00FF00:FB", "LINE1:stu#0000FF:STU\\r", ) if ret:         print rrdtool.error() 复制代码 stu# ./update.py stu# ls -l /usr/local/www/apache22/data/temperture.png -rw-r--r--  1 root  wheel  7158 Jun 27 16:47 /usr/local/www/apache22/data/temperture.png stu# 这是成果：

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