Server Log Mrtg

Server Log Mrtg
http://oss.oetiker.ch/mrtg/doc/mrtg-unix-guide.en.html

mrtg tanpa snmp on Debian Squeeze
mengapa tanpa snmp?
sekedar untuk mengurangi resources memory dan cpu, jika resources RIG tidak terlalu mewah dan ada fungsi lain yg jauh lebih penting, untuk squid cache misalnya. snmpd (snmp daemon) lumayan perlu resources cpu, terutama saat snmpwalk untuk mengumpulkan data-data yg di request mrtg
disini kita hanya akan menggunakan script bash dan perl untuk menggantikan snmpwalk

data yang di graph : ethernet traffic, memory usage, cpu load, tcp connection dan latency

apt-get install gcc make perl apache2 libgd2-noxpm libpng12-0 libpng12-dev

cd ..
mkdir -p /usr/local/src
cd /usr/local/src
wget http://nchc.dl.sourceforge.net/project/libpng/libpng15/1.5.9/libpng-1.5.9.tar.gz
gunzip -c libpng-1.5.9.tar.gz | tar xf -
mv libpng-1.5.9 libpng
cd libpng
env CFLAGS="-O3 -fPIC" ./configure --prefix=$INSTALL_DIR
make
rm *.so.* *.so
make && make install
cd ..

wget http://fossies.org/unix/www/GD-2.46.tar.gz
gunzip -c GD-2.46.tar.gz |tar xf -
mv GD-2.46.tar.gz gd
cd gd
env CPPFLAGS="-I../zlib -I../libpng" LDFLAGS="-L../zlib -L../libpng" ./configure --disable-shared --without-freetype --without-jpeg
make
cp .libs/* .
make && make install

apt-get install -y mrtg

answer “yes” saat installer ask “mrtg.cfg only readable/writeable by root”

buat file-file loadavg.sh mem.sh ping.pl tcpconn.sh dan eth.pl di /usr/local/bin

cd /usr/local/bin

nano mem.sh

#!/bin/sh

# Thierry Nkaoua [email protected]

USED=`free -b|grep cache:|cut -d ":" -f2|cut -c1-11`
#FREE=`free -b|grep cache:|cut -d ":" -f2|cut -c12-22`
echo $USED
echo $USED

nano eth.pl

#!/usr/bin/perl

use strict;

my $if = $ARGV[0] || mrtg_die();

open(F, "</proc/net/dev") || mrtg_die();
my @LINES = <F>;
close(F);

foreach (grep(/\s+$if\:/, @LINES)) {
    /\s+$if\:(\s*\d*){1}/;
    my $recv = $1;
        $recv =~ s/\s+//g;

    /\s+$if\:(\s*\d*){9}/;
    my $sent = $1;
        $sent =~ s/\s+//g;

    print "$recv\n$sent\n0\n0\n";
}

sub mrtg_die() {
    print "0\n0\n0\n0\n";
}


nano loadavg.sh

#!/bin/sh
awk </proc/loadavg '{print (100*$1) "\n" (100*$2) }'
hostname;
echo "loadavg";

nano tcpconn.sh

#!/bin/sh

if [ "$1" = "" ] ; then
	O=`/bin/netstat -nt | fgrep ESTABLISHED | wc -l`
	label='numconns'
else
	O=`/bin/netstat -nt | fgrep ESTABLISHED | fgrep "$1" | wc -l`
	label="$1"
fi
echo $O
echo $O
hostname
echo "$label"


nano ping.pl

#!/usr/bin/perl
use strict;
use warnings;
use Net::Ping;
use Time::HiRes;

my $host = shift;

my $p = Net::Ping->new("icmp");
$p->hires();
my ($ret, $duration, $ip) = $p->ping($host, 5.5);
if ( $ret ) {
        printf "%.0f\n", 1000 * $duration;
} else {
        print "0\n";
}

# Value "in" for mrtg
print "0\n";
# Value "out" for mrtg
print "\n";
# A comment for mrt
print "$host\n";
$p->close();



untuk code dari file-file diatas bisa di ambil dari sini:
http://pastebin.com/R7zNZ5jw
http://pastebin.com/xD5ZctwV
http://pastebin.com/uRCLi3J6
http://pastebin.com/7VF1GZMW
http://pastebin.com/8h99Kuhf


buat executable  semua file
chmod +x *

buat/edit file /etc/mrtg.cfg

nano /etc/mrtg.cfg

config mrtg :

# -------------------------------------------
# OLCNET mrtg.cfg 17072011
# -------------------------------------------

# Global Config
# -------------------------------------------

WorkDir: /var/www/mrtg
09	#RunAsDaemon:Yes
10	Interval:5
11	WriteExpires: Yes
12	EnableIPv6: no
13	Background[_]:#CCCCCC;
14	Colours[_]:LIGHTBLUE#0099FF,ORANGE#FF6600,BLUE#0000FF,RED#FF0000
15	Options[_]: nopercent,growright,noinfo,gauge
16
17	# eth0
18	# -------------------------------------------
19
20	Title[eth0]: Ethernet Trafic
21	PageTop[eth0]: <h1>Ethernet Trafic</h1>
22	Target[eth0]: `/usr/local/bin/eth.pl eth0`
23	Options[eth0]: bits
24	MaxBytes[eth0]: 100000000
25
26	# Memory
27	# -------------------------------------------
28
29	Title[mem]: Memory Usage
30	PageTop[mem]: <h1>Memory Usage</h1>
31	Target[mem]: `/usr/local/bin/mem.sh`
32	Options[mem]: gauge,noinfo,nopercent,growright,nobanner,noarrow,pngdate
33	MaxBytes[mem]: 1024000000
34	YLegend[mem]: Bytes
35	ShortLegend[mem]: Bytes
36	LegendO[mem]: Mem Used :
37	WithPeak[mem]: wmy
38	Kilo[mem]:1024
39
40	# TCP Connection
41	# -------------------------------------------
42
43	Title[server-numconns]: Server TCP connections
44	Target[server-numconns]: `/usr/local/bin/tcpconn.sh`
45	PageTop[server-numconns]: <h1>TCP connections</h1>
46	MaxBytes[server-numconns]: 1000
47	YLegend[server-numconns]: Connections
48	ShortLegend[server-numconns]: Connections
49	LegendO[server-numconns]: Connections
50	Options[server-numconns]: gauge, growright
51
52	## CPU Load
53	# -------------------------------------------
54
55	Target[server-cpu]: `/usr/local/bin/loadavg.sh`
56	MaxBytes[server-cpu]: 500
57	Title[server-cpu]: CPU Load
58	PageTop[server-cpu]: <h1>CPU Load</h1>
59	YLegend[server-cpu]: Load*100
60	ShortLegend[server-cpu]: load
61	Legend1[server-cpu]: CPU Load (x 100)
62	Legend2[server-cpu]:
63	LegendI[server-cpu]: 1min load
64	LegendO[server-cpu]: 5min load
65	Options[server-cpu]: gauge,nopercent,integer,growright
66
67	# Latency Local
68	# -------------------------------------------
69
70	Target[ping_local]: `/usr/local/bin/ping.pl www.detik.com`
71	Title[ping_local]: Latency Local
72	PageTop[ping_local]: <h1>Latency Local</h1>
73	LegendO[ping_local]:
74	MaxBytes[ping_local]: 10000
75	Options[ping_local]: gauge,growright
76	LegendI[ping_local]: Ping in ms
77	ShortLegend[ping_local]: ms
78	YLegend[ping_local]: ms
79	Factor[ping_local]: 1
80
81	# Latency Inter
82	# -------------------------------------------
83
84	Target[ping_inter]: `/usr/local/bin/ping.pl www.yahoo.com`
85	Title[ping_inter]: Latency Inter<
86	PageTop[ping_inter]: <h1>Latency Inter</h1>
87	LegendO[ping_inter]:
88	MaxBytes[ping_inter]: 10000
89	Options[ping_inter]: gauge,growright
90	LegendI[ping_inter]: Ping in ms
91	ShortLegend[ping_inter]: ms
92	YLegend[ping_inter]: ms
93	Factor[ping_inter]: 1

buat workdir mrtg
mkdir -p /var/www/mrtg
mkdir -p /var/www/mrtg/image

jalankan mrtg
env LANG=C mrtg /etc/mrtg.cfg

jalankan command diatas 3x sampai pesan warning hilang

edit lagi file /etc/mrtg.cfg
nano /etc/mrtg.cg

hilangkan tanda “#” di depan RunAsDaemon:Yes

jalankan sekali lagi mrtg untuk aktifkan daemon mrtg
env LANG=C mrtg /etc/mrtg.cfg

buat index.html
indexmaker --output=/var/www/mrtg/index.html /etc/mrtg.cfg

akses via broser ke http://[ip-address]/mrtg

buka webmin, kita akan buat start-up mrtg dari webmin

webmin > system > bootup and shutdown > Create a new bootup and shutdown action

note

    * Target[eth0]: `/usr/local/bin/eth.pl eth0` > jika ethernet yg aktif bukan eth0, ganti eth0 dengan ethernet card yang aktif. jalankan ifconfig untuk melihat ethernet yang aktif
    * Target[ping_inter]: `/usr/local/bin/ping.pl www.yahoo.com` > silahkan diganti dengan host lain sesuai selera misalnya microsoft.com ato cuma IP-nya tidak perlu pakai hostname. hanya pastikan host yang anda pakai reliable