Monitoring

June 29, 2026 ยท View on GitHub

  • active API checks - the gold standard most don't know
  • port checks
  • protocol checks
  • metrics & thresholds - deviations from normal

Interactive Monitoring

See the Performance page for live commands and text dumps.

Cloud Monitoring Services

  • Datadog
  • Pingdom

APM - Application Performance Monitoring

  • AppDynamics
  • New Relic

Nagios

See nagios.md

Metrics

OpenTSDB

See opentsdb.md

Collectl

from EPEL:

yum install -y collectl

Configure for Graphite:

sed -i.bak -e 's/^DaemonCommands/#DaemonCommands/g' /etc/collectl.conf
sed -i -e 's/^#DaemonCommands/a DaemonCommands = -f \/var\/log\/collectl -P -M -scdmnCDZ --export graphite,localhost:2003,p=os,s=cdmnCDZ' /etc/collectl.conf

Start service:

service collectl restart

Ganglia

Simple but old now, used to use for clusters like Hadoop in 2009.

  • gmetad - server
  • gmond - agent

Port 8649

Geneos

Proprietary Monitoring System.

  • agent "netprobes", pre-configured checked + metrics, CPU, disk space etc
  • sample rate eg. 60 secs
  • CSV output with header columns, shows CSV table on UI
  • gateway == collection / hosting server
  • on gateway configure matches / thresholds on the column cells to raise alerts
  • Windows "ActiveConsole" UI app connects to N gateways to monitor
  • configure checks on gateway
  • shell script exit 1 loses the stdout/stderr? This makes no sense, double check this is true from this old note
  • can't run Nagios Plugins (I did write an adapter for its format)
  • wouldn't recommend using it unless you had no other choice - this is legacy enterprise software
  • used by 3 financials I worked at - which if you know old financials you'll know is not a flex