Monitoring CPU Metrics

This article will help you get the System_core plugin for sd-agent configured and returning metrics

Installing the system_core plugin package

Install the system_core plugin on Debian/Ubuntu:

sudo apt-get install sd-agent-system-core

Install the system_core plugin on RHEL/CentOS:

sudo yum install sd-agent-system-core

Read more about agent plugins.

Configuring the agent to collect CPU Core metrics

1. Configure /etc/sd-agent/conf.d/system_core.yaml

This check does not have any configuration options. However one item in a single instance must be present in the configuration file for the check to run. The content of the item doe not matter.

init_config:

instances:
  - foo: bar

2. Restart the agent

sudo /etc/init.d/sd-agent restart

or

sudo systemctl restart sd-agent

Verifying the configuration
Execute info to verify the configuration with the following:

sudo /etc/init.d/sd-agent info 

or

/usr/share/python/sd-agent/agent.py info

If the agent has been configured correctly you'll see an output such as:

system_core
-----
  - instance #0 [OK]
  - Collected * metrics

You can also view the metrics returned with the following command:

sudo -u sd-agent /usr/share/python/sd-agent/agent.py check system_core

Configuring graphs

Click the name of your server from the Devices list in your Server Density account then go to the Metrics tab. Click the + Graph button on the right then choose the system_core metrics to display the graphs. The metrics will also be available to select when building dashboard graphs.

Screen_Shot_2018-01-18_at_11.46.12.png

Monitored metrics

MetricValues
system.core.count

The number of CPU cores on the host
core / None
Type: float
system.core.idle

A given core's idle CPU time
None / None
Type: float
system.core.system

A given core's system CPU time
None / None
Type: float
system.core.user

A given core's user-space CPU time
None / None
Type: float
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