ProCKSI

= Monitoring of Cluster Resources: Ganglia =
''Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids.''

• Download the latest release of the ''Ganglia Monitoring Core'' from [http://ganglia.sourceforge.net/ http://ganglia.sourceforge.net].
• Install Ganglia into ''/usr/local/ganglia'', its web frontend into ''/usr/local/ganglia/html/', and its databases into ''/usr/local/ganglia/rrds/'.
• Install the ''Ganglia Monitoring Daemon'' (gmond) on each node, and the ''Ganglia Meta Daemon'' (gmetad) on the the head node.

Ganglia Monitoring Daemon * Configure, build and install Ganglia on each slave node (only with ''gmond''): {{{
./configure --prefix=/usr/local
}}}
and on the master node (with ''gmond'' and ''gmetad''): {{{
./configure --prefix=/usr/local --with-gmeta
}}} * Initialise the configuration file for ''gmond'': {{{
gmond --default >> /etc/gmond.conf
}}} * Configure the ''Ganglia Monitoring Daemon'' in ''/etc/gmond.conf'': * Set the name of the cluster: {{{
cluster {
name = "ProCKSI"
}
}}} * Set the IP address and port for multicast data exchange: {{{
udp_send_channel {
mcast_join = 239.2.11.71
port = 8649
}
udp_recv_channel {
mcast_join = 239.2.11.71
port = 8649
bind = 239.2.11.71
}
}}} * Copy start-up script for ''gmond'': {{{
cp ./gmond/gmond.init /etc/init.d/gmond
}}} * Add additional route for correct data exchange via multicast using the ''internal'' interface (''eth0''). Modify ''/etc/inid.d/gmond'': {{{
#Add multicast route to internal interface
/sbin/route add -host 239.2.11.71 dev eth0
daemon $GMOND
}}} {{{
#Remove multicast route to internal interface
/sbin/route delete -host 239.2.11.71 dev eth0
killproc gmond
}}} * Make the Ganglia Monitoring Daemon start at bootup. {{{
/sbin/chkconfig gmond on
}}} * Start the Ganglia Monitoring Daemon: {{{
/sbin/service gmond start
}}} Ganglia Meta Daemon * Install and configure the ''Ganglia Meta Daeomn'' (gmetad) on the master node. * Make the Ganglia Meta Daemon start at bootup. {{{
/sbin/chkconfig --add gmetad
/sbin/chkconfig gmetad on
}}} * Start the Ganglia Meta Daemon: {{{
/sbin/service gmetad start
}}} * If the pie chart diagrams do not show up, you have to install the ''php-gd'' packages. Further Customisation
In order to display more fine-grained time intervals, edit the following files in ''/usr/local/ganglia/html/'': * '''header.php''' {{{
if (!$physical) {
$context_ranges[]="10 minutes";
$context_ranges[]="20 minutes";
$context_ranges[]="30 minutes";
$context_ranges[]="1 hour";
$context_ranges[]="2 hours";
$context_ranges[]="4 hours";
$context_ranges[]="8 hours";
$context_ranges[]="12 hours";
$context_ranges[]="1 day";
$context_ranges[]="2 days";
$context_ranges[]="week";
$context_ranges[]="month";
$context_ranges[]="year";
}}} * '''get_context.php''' {{{
switch ($range) {
case "10 minutes": $start = -600; break;
case "20 minutes": $start = -1200; break;
case "30 minutes": $start = -1800; break;
case "1 hour": $start = -3600; break;
case "2 hours": $start = -7200; break;
case "4 hours": $start = -14400; break;
case "8 hours": $start = -28800; break;
case "12 hours": $start = -43200; break;
case "1 day": $start = -86400; break;
case "2 days": $start = -172800; break;
case "week": $start = -604800; break;
case "month": $start = -2419200; break;
case "year": $start = -31449600; break;
}}}