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Monitoring Cheat Sheet

Graphite, Diamond

  • Enabling Diamond collectors:

    echo "enabled = true" >> /etc/diamond/<name>Collector.conf

  • Checking Diamond collectors:

    diamond-setup -p -C <name>Collector
  • grafana - Graphite / InfluxDB dashboard
  • Graphite Clustering
  • Graphite Backends:
    • Whisper (legacy): fixed-sized database
    • Ceres: sparse data, arbitrary fixed-size resolutions

Munin

  • Munin - Test Plugins:

    /usr/sbin/munin-run <plugin name> # for values
/usr/sbin/munin-run <plugin name> config # for configuration

  • Munin - Test available plugins

    /usr/sbin/munin-node-configure --suggest

# and enable them using
/usr/sbin/munin-node-configure --shell | sh

  • Munin Server - Manual Update Run:

    sudo -u munin /usr/bin/munin-cron

Nagios, Icinga

  • dmesg Nagios Plugin
  • Icinga 1 - status.cgi Parameters

  • Icinga 1 - Object Tricks: Negative hostgroup definitions

    define service {
    ...
    hostgroup_name   all,!testing
    ...
}

  • Icinga 2 - Matching check definitions on hosts/hostgroups

    apply Service "MyService" {
    # service definition...

    assign where host.name == "MyHost1"
    assign where match("hostprefix-*", host.name)
    assign where "MyHostGroup" in host.groups
}
  • Mod-Gearman: Nagios distributed checking (previously called Naemon)

  • Gearman Debugging:

    gearman-top

Misc