= Ganglia (Computer resource monitor) =

== Server composition ==
  * Monitoring server
    * k1sum0 (Debian9)
    * URL: http://k1sum0/ganglia (internal)
  * Monitored servers
    * k1cam0
    * k1cam1 (SL7)
    * k1sum0 (Debian9)
    * k1sum1 (Debian9)
    * k1sumX (Debian9)
    * k1det0 (Debian9)
    * k1det1 (Debian9)
    * k1det2 (Debian9)
    * k1nfs0 (Debian9)
    * k1script (Debian8)

== Installation ==
  * Monitoring server
    * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/SummaryPage/k1sum0|Duncan's memo]]
  {{{
> apt-get install rrdtool gmetad ganglia-webfrontend ganglia-monitor
  }}}
    * Setting files: {{{/etc/ganglia/gmond.conf}}} and {{{/etc/ganglia/gmetad.conf}}}
  * Monitored servers
  {{{
deb> apt-get install ganglia-monitor
SL> yum install gmond
  }}}
    * Setting files: {{{/etc/ganglia/gmond.conf}}}

== Note ==
  * We must restart ganglia service on all monitored servers after the monitoring server is rebooted (Why?).
  {{{
deb> systemctl restart ganglia-monitor
SL> systemctl restart gmond
  }}}