How to set up MRTG on Fedora 11

How to set up MRTG on Fedora 11

[root@arizona ~]# cat /etc/fedora-release 

Fedora release 11 (Leonidas)

[root@arizona ~]# uname -r

2.6.30.10-105.2.23.fc11.x86_64

- net-snmp をインストール

[root@arizona ~]# yum install -y net-snmp.x86_64 net-snmp-utils.x86_64

[root@arizona ~]# snmpd -v

NET-SNMP version:  5.4.2.1

net-snmp-utils に snmpwalk などのツールがはいっている。

snmpd は net-snmp 。

- net-snmp の設定

[root@arizona ~]# egrep -v "^#" /etc/snmp/snmpd.conf | grep -v "^$"

com2sec local     localhost       public

com2sec mynetwork 0.0.0.0/0       public

group MyRWGroup  any        local

group MyROGroup  any        mynetwork

view all    included  .1                               80

access MyRWGroup ""      any       noauth    0      all    all    all

syslocation Unknown (edit /etc/snmp/snmpd.conf)

syscontact Root (configure /etc/snmp/snmp.local.conf)

pass .1.3.6.1.4.1.4413.4.1 /usr/bin/ucd5820stat

- 起動

[root@arizona ~]# /etc/init.d/snmpd start

snmpd を起動中:                                            [  OK  ]

- snmpget できるかチェック

[root@arizona ~]# snmpbulkwalk -c public -v 2c 127.1 . | head -5

SNMPv2-MIB::sysDescr.0 = STRING: Linux arizona.localdomain 2.6.30.10-105.2.23.fc11.x86_64 #1 SMP Thu Feb 11 07:06:34 UTC 2010 x86_64

SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10

DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (12173) 0:02:01.73

SNMPv2-MIB::sysContact.0 = STRING: Root (configure /etc/snmp/snmp.local.conf)

SNMPv2-MIB::sysName.0 = STRING: arizona.localdomain

- MRTG をインストール

[root@arizona ~]# yum install -y mrtg.x86_64

- MRTG の設定

cfgmaker コマンドを使うとインターフェースの情報、コミュニティ名を mrtg.conf に登録してくれる。

[root@arizona ~]# cfgmaker public@localhost > /etc/mrtg/mrtg.cfg

ためしに mrtg を起動

[root@arizona ~]# mrtg /etc/mrtg/mrtg.cfg

-----------------------------------------------------------------------

ERROR: Mrtg will most likely not work properly when the environment

       variable LANG is set to UTF-8. Please run mrtg in an environment

       where this is not the case. Try the following command to start:

       env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg 

-----------------------------------------------------------------------

[root@arizona ~]# env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

Use of uninitialized value $dir in concatenation (.) or string at /usr/bin/mrtg line 2530.

Use of uninitialized value $dir in concatenation (.) or string at /usr/bin/mrtg line 2548.

Use of uninitialized value $dir in concatenation (.) or string at /usr/bin/mrtg line 2564.

ERROR: "WorkDir" not specified in mrtg config file

またもやエラー。

mrtg.conf を編集

下記3つを追加。あとはそのまま。

WorkDir: /root/mrtg

Options[_]: growright, bits

Language:eucjp

ディレクトリの作成。この下にファイルが生成される。

[root@arizona ~]# mkdir /root/mrtg

mrtg を再度起動

warning だからいいや。

[root@arizona ~]# env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

2010-02-26 02:38:01, Rateup WARNING: /usr/bin/rateup could not read the primary log file for localhost_2

2010-02-26 02:38:01, Rateup WARNING: /usr/bin/rateup The backup log file for localhost_2 was invalid as well

2010-02-26 02:38:01, Rateup WARNING: /usr/bin/rateup Can't remove localhost_2.old updating log file

2010-02-26 02:38:01, Rateup WARNING: /usr/bin/rateup Can't rename localhost_2.log to localhost_2.old updating log file

2010-02-26 02:38:02, Rateup WARNING: /usr/bin/rateup could not read the primary log file for localhost_3

2010-02-26 02:38:02, Rateup WARNING: /usr/bin/rateup The backup log file for localhost_3 was invalid as well

2010-02-26 02:38:02, Rateup WARNING: /usr/bin/rateup Can't remove localhost_3.old updating log file

2010-02-26 02:38:02, Rateup WARNING: /usr/bin/rateup Can't rename localhost_3.log to localhost_3.old updating log file

[root@arizona ~]# ls /root/mrtg/

localhost_2-day.png    localhost_2.log        localhost_3-year.png  mrtg-m.png

localhost_2-month.png  localhost_2.old        localhost_3.html      mrtg-r.png

localhost_2-week.png   localhost_3-day.png    localhost_3.log

localhost_2-year.png   localhost_3-month.png  localhost_3.old

localhost_2.html       localhost_3-week.png   mrtg-l.png

[root@arizona ~]# google-chrome /root/mrtg/localhost_2.html  ( <- eth0 の情報 )

- CPU使用率の表示を追加

CPU使用率は以下の OID でとれる。

ssCpuRawUser.0(.1.3.6.1.4.1.2021.11.50.0) <- ユーザのCPU使用率

ssCpuRawSystem.0(.1.3.6.1.4.1.2021.11.52.0) <- システムのCPU使用率

[root@arizona ~]# snmpget -v 2c -c public 127.1 .1.3.6.1.4.1.2021.11.50.0

UCD-SNMP-MIB::ssCpuRawUser.0 = Counter32: 33717

[root@arizona ~]# snmpget -v 2c -c public 127.1 .1.3.6.1.4.1.2021.11.52.0

UCD-SNMP-MIB::ssCpuRawSystem.0 = Counter32: 18507

/etc/mrtg/mrtg.cfg

#CPU Usage 

Target[cpu]: .1.3.6.1.4.1.2021.11.50.0&.1.3.6.1.4.1.2021.11.52.0:public@localhost

MaxBytes[cpu]: 100

Options[cpu]: growright, noinfo, nopercent

YLegend[cpu]: CPU usage(%)

ShortLegend[cpu]: (%)

LegendI[cpu]: user  

LegendO[cpu]: system

Legend1[cpu]: CPU Usage(user)(%)

Legend2[cpu]: CPU Usage(system)(%)

Title[cpu]: CPU Usage

PageTop[cpu]:CPU Usage

とれるかチェック

[root@arizona ~]# env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

2010-02-26 02:56:40, Rateup WARNING: /usr/bin/rateup could not read the primary log file for cpu

2010-02-26 02:56:40, Rateup WARNING: /usr/bin/rateup The backup log file for cpu was invalid as well

2010-02-26 02:56:40, Rateup WARNING: /usr/bin/rateup Can't remove cpu.old updating log file

2010-02-26 02:56:40, Rateup WARNING: /usr/bin/rateup Can't rename cpu.log to cpu.old updating log file

[root@arizona ~]# ls /root/mrtg/

cpu-day.png    localhost_2-day.png    localhost_2.old        localhost_3.log

cpu-month.png  localhost_2-month.png  localhost_3-day.png    localhost_3.old

cpu-week.png   localhost_2-week.png   localhost_3-month.png  mrtg-l.png

cpu-year.png   localhost_2-year.png   localhost_3-week.png   mrtg-m.png

cpu.html       localhost_2.html       localhost_3-year.png   mrtg-r.png

cpu.log        localhost_2.log        localhost_3.html

[root@arizona ~]# google-chrome /root/mrtg/cpu.html

- 空きメモリ量

[root@arizona ~]# snmpget -v 2c -c public 127.1 .1.3.6.1.4.1.2021.4.6.0

UCD-SNMP-MIB::memAvailReal.0 = INTEGER: 2891720 kB

[root@arizona ~]# snmpget -v 2c -c public 127.1 .1.3.6.1.4.1.2021.4.4.0

UCD-SNMP-MIB::memAvailSwap.0 = INTEGER: 8387220 kB

[root@arizona ~]# snmpget -v 2c -c public 127.1 .1.3.6.1.4.1.2021.4.4.0

UCD-SNMP-MIB::memAvailSwap.0 = INTEGER: 8387220 kB

[root@arizona ~]# free

             total       used       free     shared    buffers     cached

Mem:       4018048    1130472    2887576          0      38468     440504

-/+ buffers/cache:     651500    3366548

Swap:      8387220          0    8387220

[root@arizona ~]# cat /etc/mrtg/mrtg.cfg

# Memory Free 

Target[mem]: .1.3.6.1.4.1.2021.4.6.0&.1.3.6.1.4.1.2021.4.4.0:public@localhost

MaxBytes1[mem]: 4018048 

MaxBytes2[mem]: 8387220  

Unscaled[mem]: dwmy

Options[mem]: gauge, absolute, growright, noinfo

YLegend[mem]: Mem Free(Bytes)

ShortLegend[mem]: Bytes

kilo[mem]: 1024

kMG[mem]: k,M,G,T,P

LegendI[mem]: Real

LegendO[mem]: Swap

Legend1[mem]: Free Memory[MBytes]

Legend2[mem]: Free Swap Memory[MBytes]

Title[mem]: Free Memory

PageTop[mem]:Free Memory

[root@arizona ~]# env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

2010-02-26 03:17:21, Rateup WARNING: /usr/bin/rateup Can't remove mem.old updating log file

[root@arizona ~]# ls /root/mrtg/

cpu-day.png          localhost_2-month.png  localhost_3-week.png  mem-year.png

cpu-month.png        localhost_2-week.png   localhost_3-year.png  mem.html

cpu-week.png         localhost_2-year.png   localhost_3.html      mem.log

cpu-year.png         localhost_2.html       localhost_3.log       mem.old

cpu.html             localhost_2.log        localhost_3.old       mrtg-l.png

cpu.log              localhost_2.old        mem-day.png           mrtg-m.png

cpu.old              localhost_3-day.png    mem-month.png         mrtg-r.png

localhost_2-day.png  localhost_3-month.png  mem-week.png

- 起動スクリプト

mrtg.cfg のワーキングディレクトリを変更

WorkDir: /var/www/mrtg

[root@arizona ~]# cat mrtg.sh 

#!/bin/bash

LOCK=/var/www/mrtg/mrtg_l

CONFCACHE=/var/www/mrtg/mrtg.ok

export LANG=ja_JP.UTF-8

mrtg /etc/mrtg/mrtg.cfg --lock-file $LOCK --confcache-file $CONFCACHE

[root@arizona ~]# chmod u+x mrtg.sh 

[root@arizona ~]# 

3回実行 ( 三回目以降エラーがなくなる )

[root@arizona ~]# ./mrtg.sh 

2010-02-26 03:32:35, Rateup WARNING: /usr/bin/rateup could not read the primary log file for localhost_2

2010-02-26 03:32:35, Rateup WARNING: /usr/bin/rateup The backup log file for localhost_2 was invalid as well

2010-02-26 03:32:35, Rateup WARNING: /usr/bin/rateup Can't remove localhost_2.old updating log file

2010-02-26 03:32:35, Rateup WARNING: /usr/bin/rateup Can't rename localhost_2.log to localhost_2.old updating log file

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup could not read the primary log file for localhost_3

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup The backup log file for localhost_3 was invalid as well

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup Can't remove localhost_3.old updating log file

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup Can't rename localhost_3.log to localhost_3.old updating log file

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup could not read the primary log file for cpu

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup The backup log file for cpu was invalid as well

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup Can't remove cpu.old updating log file

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup Can't rename cpu.log to cpu.old updating log file

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup could not read the primary log file for mem

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup The backup log file for mem was invalid as well

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup Can't remove mem.old updating log file

2010-02-26 03:32:36, Rateup WARNING: /usr/bin/rateup Can't rename mem.log to mem.old updating log file

[root@arizona ~]# ./mrtg.sh 

2010-02-26 03:32:38, Rateup WARNING: /usr/bin/rateup Can't remove localhost_2.old updating log file

2010-02-26 03:32:38, Rateup WARNING: /usr/bin/rateup Can't remove localhost_3.old updating log file

2010-02-26 03:32:38, Rateup WARNING: /usr/bin/rateup Can't remove cpu.old updating log file

2010-02-26 03:32:38, Rateup WARNING: /usr/bin/rateup Can't remove mem.old updating log file

[root@arizona ~]# ./mrtg.sh 

[root@arizona ~]# 

[root@arizona ~]# ls /var/www/mrtg/

cpu-day.png            localhost_2-week.png   localhost_3.log  mrtg-l.png

cpu-month.png          localhost_2-year.png   localhost_3.old  mrtg-m.gif

cpu-week.png           localhost_2.html       mem-day.png      mrtg-m.png

cpu-year.png           localhost_2.log        mem-month.png    mrtg-r.gif

cpu.html               localhost_2.old        mem-week.png     mrtg-r.png

cpu.log                localhost_3-day.png    mem-year.png     mrtg-ti.gif

cpu.old                localhost_3-month.png  mem.html         mrtg-ti.png

favicon.ico            localhost_3-week.png   mem.log          mrtg.ok

localhost_2-day.png    localhost_3-year.png   mem.old

localhost_2-month.png  localhost_3.html       mrtg-l.gif

cron で定期的に回す

edit

[root@arizona ~]# crontab -e

*/5 * * * * /root/mrtg.sh

list

[root@arizona ~]# crontab -l

*/5 * * * * /root/mrtg.sh

- web でみれるようにする

httpd起動時に httpd.conf の設定より conf.d/*.conf を読む。

[root@arizona ~]# egrep -v "^#" /etc/httpd/conf.d/mrtg.conf

Alias /mrtg /var/www/mrtg

    Order deny,allow

    Deny from all

    Allow from all

    Allow from 127.0.0.1

    Allow from ::1

[root@arizona ~]# apachectl start

- index ページの作成

[root@arizona ~]# indexmaker --columns=1 --addhead='' /etc/mrtg/mrtg.cfg > /var/www/mrtg/index.html

トップ画面

http://127.0.0.1/mrtg/index.html

文字化けしてる。。まぁーいっか。