以下動作皆在 DRBL server 上處理

== Ganglia ==

 1. Install (Base on Ubuntu Dapper)
  * Install necessary package from repository : apache2-php4, php4-gd, php4-jpgraph, php4-rrdtool, rrdtool, gcc, g++, libc6, librrd2-dev[[BR]]
  * Download last stable version ganglia, In our case, use "ganglia-3.0.4.tar.gz"
{{{
http://sourceforge.net/project/showfiles.php?group_id=43021&package_id=35280
}}}
  * Uncompress package, and configure and make
{{{
$ tar xzvf ganglia-3.0.4.tar.gz; cd /ganglia-3.0.4
$ ./configure --with-gmetad --prefix=/opt/ganglia
$ make
$ sudo make install
}}}
  * Install Web Frontend:
{{{
$ cp -a web /var/www/ganglia
}}}

 2. Configure
  * Add a user, group for ganglia service, say "ganglia:ganglia"
  * On frontend, create a gmond configuration file named gmond.conf
{{{
$ /opt/ganglia/sbin/gmond --default_config > /etc/gmond.conf
}}}
  * Edit file: /etc/gmond.conf
{{{
globals {
  daemonize = yes
  setuid = yes
  user = ganglia	-------------> match 1.2.0
  debug_level = 0
  max_udp_msg_len = 1472
  mute = no
  deaf = no
  host_dmax = 0 /*secs */
  cleanup_threshold = 300 /*secs */
  gexec = no
}
cluster {
  name = "DRBL Cluster Project"	-------------> as you want
  owner = "NCHC OSS Lab"	-------------> as you want
  latlong = "unspecified"
  url = "unspecified"
}
udp_send_channel {
  host = 192.168.201.254 ---------------> match your LAN connection ip
  port = 8649
}

}}}
  * On frontend, create a Gmetad configuration file named gmetad.conf
{{{
$ cp /opt/src/ganglia-3.0.4/gmetad/gmetad.conf /etc/gmetad.conf
}}}
  * Edit file /etc/gmetad.conf
{{{
data_source "Test Cluster" 127.0.0.1:8649

trusted_hosts 127.0.0.1

setuid_username "ganglia"
}}}
  * On frontend, edit web frontend configuration file "/var/www/ganglia/conf.php"
{{{
$gmetad_root = "/var/lib/ganglia";
$rrds = "$gmetad_root/rrds";

define("RRDTOOL", "/usr/bin/rrdtool");

$ganglia_ip = "127.0.0.1";
}}}

 3. Setup Ganglia service and start up
  * Perpare rrd log directory
{{{
$ mkdir -p /var/lib/ganglia/rrds
$ chown ganglia:ganglia /var/lib/ganglia/rrds
}}}
  * Start up service during booting, add the follow into file /etc/rc.local '''---------> client 要保留，或以其他方式起動'''
{{{
# Start up ganglia service
/opt/ganglia/sbin/gmond
/opt/ganglia/sbin/gmetad	'''--------> client 則可以不用'''
}}}
  * Start up necessary service now
{{{
$ /opt/ganglia/sbin/gmetad
$ /opt/ganglia/sbin/gmond
}}}

 4. Configure frontend php web page
  * Copy necessary frontend php scripts
{{{
$ cp -a /opt/src/ganglia-3.0.4/web /var/www/ganglia
}}}
  * Make sure the follow session be set correctly file "/var/www/ganglia/conf.php"
{{{
$gmetad_root = "/var/lib/ganglia";
$rrds = "$gmetad_root/rrds";

define("RRDTOOL", "/usr/bin/rrdtool");

$ganglia_ip = "127.0.0.1";
}}}