Monitoring.md

related
cheat-sheet Solutions Monitoring

Graphite, Diamond

• Enabling Diamond collectors:

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

• Checking Diamond collectors:

    diamond-setup -p -C <name>Collector
  

• grafana - dashboards for all monitoring sources

• 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

• Jolokia JMX HTTP/JSON bridge + jxm4perl