Monitoring Entropy

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

Installing the Entropy plugin package

Install the entropy plugin on Debian/Ubuntu:

sudo apt-get install sd-agent-entropy

Install the entropy plugin on RHEL/CentOS:

sudo yum install sd-agent-entropy

Read more about agent plugins.

Configuring the agent to monitor Entropy

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

# This check takes no initial configuration
init_config:

instances:
    [{}]

• Important: the sd-agent user must have sudo access to run this plugin. See sudo access for more info

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:

entropy
-----
  - 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 entropy

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 entropy metrics to display the graphs. The metrics will also be available to select when building dashboard graphs.

Monitored metrics

Metric	Values
system.entropy.available	/ Type: int

Metrics Conversion

Please refer to the metrics conversion document to map old metrics names to the new metric names.