rrdtool 实践

rrdtool 实践

rrdtool 参数比较多,如果直接看文档,不知从何入手,直接从例子入手这样容易理解,模拟网卡流量

1. 创建数据库

rrdtool create Flow.rrd --start $(date +%s) --step 1 DS:eth0_in:GAUGE:1:0:U DS:eth0_out:GAUGE:1:0:U RRA:LAST:0.5:1:2 RRA:LAST:0.5:1:4 RRA:AVERAGE:0.5:1:600 RRA:AVERAGE:0.5:6:700 RRA:MAX:0.5:1:600 RRA:MAX:0.5:444:797

2. 更新数据(模拟流量数据)

import sys,os
import time
import random
import rrdtool

total_input_traffic = 0
total_output_traffic = 0
starttime=int(time.time())
for i in range(100000):
    total_input_traffic = random.randrange(0, 5000)
    total_output_traffic = random.randrange(0, 5000)
    os.system("rrdtool updatev Flow.rrd"+str(starttime)+":"+str(total_input_traffic)+":"+str(total_output_traffic))
    starttime += 1
    time.sleep(1)

3.绘图(参考cacti的绘制)

rrdtool graph Flow.png --imgformat=PNG --start -1h --title=‘Localhost - Traffic - eth0‘ --rigid --base=‘1000‘ --height=‘120‘ --width=‘500‘ --alt-autoscale-max --lower-limit=‘0‘ DEF:a=Flow.rrd:eth0_in:AVERAGE DEF:b=Flow.rrd:eth0_out:AVERAGE --vertical-label=‘bits per second‘ --slope-mode --font TITLE:10: --font AXIS:7: --font LEGEND:8: --font UNIT:7: CDEF:cdefa=‘a,8,*‘ CDEF:cdefe=‘b,8,*‘ AREA:cdefa#00CF00FF:‘Inbound‘  GPRINT:cdefa:LAST:‘ Current\:%8.2lf %s‘  GPRINT:cdefa:AVERAGE:‘Average\:%8.2lf %s‘  GPRINT:cdefa:MAX:‘Maximum\:%8.2lf %s\n‘  LINE1:cdefe#002A97FF:‘Outbound‘  GPRINT:cdefe:LAST:‘Current\:%8.2lf %s‘  GPRINT:cdefe:AVERAGE:‘Average\:%8.2lf %s‘  GPRINT:cdefe:MAX:‘Maximum\:%8.2lf %s\n‘

绘制是参考cacti的绘制的，基本未做修改:

参考:http://book.51cto.com/art/201411/456743.htm

参考:http://im.nuk.edu.tw/~lee/rrdtool/index.htm

参考:http://blog.liuts.com/post/215/

参考:http://www.cnblogs.com/coldplayerest/archive/2010/02/09/1666413.html

参考:http://bbs.chinaunix.net/forum.php?mod=viewthread&tid=864861&page=1