IPv6 DNS 主機 Smokeping 監測

1. IPv6 DNS主機Smokeping監測 電算中心呂芳發 2011年11月12日

2. 大綱 • Smokeping 簡介 • Smokeping 安裝 • Config 設定檔說明 • 結論

3. SmokePing簡介 • SmokePing 用來從外部檢測服務系統的latency，用 Perl 可以快速自製檢測工具，並自動存成 RRDTool DB與圖檔，內建的 Alert 支援 Real-Time Traffic Pattern Detection，可以非常有彈性的用以自定警報通知。

4. SmokePing特性 • 跟蹤網絡延遲(latency)。 • 延遲(latency)視覺化管理工具。 • 圖形資源管理。 • 可彈性加入延遲測量工具。 • 可配置警報系統。 • “有趣”的圖形延遲圖表。 • 免費軟體

5. 如何看 Smokeping 圖 • 藉著發送測試數據封包量測往返時間。 • 對於每一cycle測量 smokeping發送多個數據封包。 在各種不同的往返時間，選擇中位數（即中間的一個）。 即當有10時間值，選擇第5個時間值繪製, 其他值繪製成連續的灰色色調的背景。 • Data packets loss , 以不同顏色表示掉封包比率。

6. 如何看 Smokeping 圖-簡圖 • AV MD • 平均中位數 • AV LS • 平均損失 • AV SD • 在每一輪的多次測量的平均標準偏差 • AM / AS • 平均中位數和平均標準差的比率

7. 如何看 Smokeping 圖-詳細圖 • AVG，MAX，MIN，now • 平均，最高，最低，目前的中位數 • SD • 標準差中位數 • am/ S • 平均中位數與標準差的比率

8. Smokeping install • Smokeping是用perl所寫的程序，不需要安裝。 • 用perl所寫，需要使用到一些工具像是rrdtool、fping、libwww-perl等，以及perl的module。需要先安裝好，當Smokeping 服務啟動時會自動簡查所需要的程序是否都安裝完成。

9. Smokeping install • using CentOS 5.7 • # yum update# rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm # yum install httpd# yum install rrdtool# yum install fping# yum install echoping# yum install curl# yum install perl perl-Net-Telnet perl-Net-DNS perl-libwww-perl perl-IO-Socket-SSL perl-Socket6 perl-CGI-SpeedyCGI

10. Smokeping install • Use the FPing6 probe Download fping6 : wget http://unfix.org/projects/ipv6/fping-2.4b2_to-ipv6.tar.gz tar xvzf fping-2.4b2_to-ipv6.tar.gz cd fping-2.4b2_to-ipv6 configure make make install

11. Smokeping install • # wget http://oss.oetiker.ch/smokeping/pub/smokeping-2.4.1.tar.gz# tar zxvf smokeping-2.4.1.tar.gz# mv smokeping-2.4.1 /opt/smokeping# cd /opt/smokeping # cd bin/# cp smokeping.dist smokeping# cd ../htdocs/# cp smokeping.cgi.dist smokeping.cgi

12. Smokeping install • # cp tr.cgi.dist tr.cgi# cd ../etc/# cp config.dist config# cp basepage.html.dist basepage.html# cp smokemail.dist smokemail# cp tmail.dist tmail# cp smokeping_secrets.dist smokeping_secrets# chmod 600 /opt/smokeping/etc/smokeping_secrets

13. Smokeping install • # vi /opt/smokeping/bin/smokeping Replace this: With This:

14. Smokeping install • # vi /opt/smokeping/htdocs/smokeping.cgi Replace this:

15. Smokeping install With this:

16. Smokeping install • # cd /opt/smokeping/htdocs# vi /opt/smokeping/htdocs/tr.cgi Replace this:

17. Smokeping install With this:

18. Smokeping install • # mkdir -p /var/www/html/smokeping/img /var/www/html/smokeping/script/ /opt/smokeping/data /opt/smokeping/var# chown -R apache:apache /var/www/html/smokeping/img # ln -s /opt/smokeping/htdocs/cropper /var/www/html/smokeping/cropper# ln -s /opt/smokeping/htdocs/resource /var/www/html/smokeping/resource# ln -s /opt/smokeping/htdocs/script/Tr.js /var/www/html/smokeping/script/Tr.js# ln -s /opt/smokeping/htdocs/smokeping.cgi /var/www/html/smokeping/smokeping.cgi# ln -s /opt/smokeping/htdocs/tr.cgi /var/www/html/smokeping/tr.cgi

19. Smokeping install • vi /etc/httpd/conf/httpd.conf change > #AddHandler cgi-script .cgito > AddHandler cgi-script .cgi Under <Directory “/var/www/html”> change > Options Indexes FollowSymLinksto > Options Indexes FollowSymLinks ExecCGI AddDefaultCharset UTF-8

20. Smokeping install • # vi /opt/smokeping/etc/basepage.html Change this: To this:

21. Smokeping install • # vi /opt/smokeping/htdocs/tr.html Change this: To this:

22. Smokeping install • # ln -s /opt/smokeping/htdocs/tr.html /var/www/html/smokeping/tr.html # vi /opt/smokeping/etc/config

23. Smokeping install • # vi /etc/init.d/smokeping # chmod 755 /etc/init.d/smokeping • Apache and Smokeping startup # /sbin/chkconfig smokeping on# /sbin/chkconfig httpd on# /sbin/service smokeping start# /sbin/service httpd start

24. Smokeping install browse http://140.115.2.38/smokeping/smokeping.cgi

25. Smokeping config

26. Config *** General *** owner = ncuadmin contact = center25@cc.ncu.edu.tw mailhost = 140.115.2.38 sendmail = /usr/sbin/sendmail imgcache = /var/www/html/smokeping/img imgurl = http://140.115.2.38/smokeping/img datadir = /opt/smokeping/data piddir = /opt/smokeping/var cgiurl = http://140.115.2.38/smokeping/smokeping.cgi

27. Config *** Alerts *** to = center25@cc.ncu.edu.tw (設定要收到警報信件的信箱) from = center25@cc.ncu.edu.tw (設定本機發信的帳號 ) +someloss  type = loss  # in percent  pattern = >20%,>20% comment = #說明 : 當連續兩個週期封包都Loss高於20% 時就alert *** Database *** step     = 300       #300秒 pings    = 20        #ping 20次

28. Config *** Presentation *** template = /opt/smokeping/etc/basepage.html charset = UTF-8 + overview width = 600 height = 50 range = 10h + detail width = 600 height = 200 unison_tolerance = 2 "Last 3 Hours" 3h "Last 30 Hours" 30h "Last 10 Days" 10d "Last 400 Days" 400d

29. Config *** Probes *** + FPing binary = /usr/local/sbin/fping6 + DNS binary = /usr/bin/dig pings = 5 step = 180

30. Config *** Targets *** probe = FPing menu = Top title = Network Latency Grapher remark = Welcome to this SmokePing website. + network menu = Net latency title = Network latency (ICMP pings) ++ ns1 host = 2001:288:3001:1::31 ++ ns2 host = 2001:288:3000:227::4 + DNS probe = DNS menu = DNS latency title = Service latency (DNS) ++ dns1 host = 2001:288:3001:1::31 ++ dns2 host = 2001:288:3000:227::4

31. Config

32. Config

33. Config-curl *** Probes *** + Curl binary = /usr/bin/curl step = 60 # a default for this target-specific variable urlformat = http://%host%/ *** Targets *** probe = Curl menu = Top title = Network Latency Grapher remark = Welcome to this SmokePing website. + HTTP menu = http title = HTTP latency ++ ncuweb menu = ncuweb title = HTTP latency for ncuweb host = www.ncu.edu.tw

34. Config-curl

35. Config-echoping *** Probes *** + EchoPingHttp binary = /usr/bin/echoping *** Targets *** probe = EchoPingHttp menu = Top title = Network Latency Grapher remark = Welcome to this SmokePing website. + HTTP menu = http title = HTTP latency ++ ncuweb menu = ncuweb title = HTTP latency for ncuweb host = www.ncu.edu.tw

36. Config-echoping

37. 結論 • 好用的延遲(latency)狀態量測工具 • 除了監測封包量測往返時間, 搭配其他工具可監測web,ftp 下載的時間及dns查詢時間

38. Thank You!