Monitoring Postfix

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

Installing the postfix plugin package

Install the postfix plugin on Debian/Ubuntu:

sudo apt-get install sd-agent-postfix

Install the postfix plugin on RHEL/CentOS:

sudo yum install sd-agent-postfix

Read more about agent plugins.

Configuring the agent to monitor Postfix

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

init_config:

instances:
 - directory: /var/spool/postfix
   queues:
     - incoming
     - active
     - deferred

• 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:

postfix
-----
  - 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 postfix

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

Monitored metrics

Metric	Values
postfix.queue.size	/ Type: float

Metrics Conversion

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