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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.
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;

ProCKSI

Wiki

Monitoring of Cluster Resources: Ganglia¶

Ganglia Monitoring Daemon¶

Ganglia Meta Daemon¶

Further Customisation¶