Monitoring PHP FPM

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

Installing the php_fpm plugin package

Install the php_fpm plugin on Debian/Ubuntu:

sudo apt-get install sd-agent-phpfpm

Install the php_fpm plugin on RHEL/CentOS:

sudo yum install sd-agent-phpfpm

Read more about agent plugins.

Configuring the agent to monitor PHP-FPM

1. To monitor PHP-FPM, you'll need to enable the status option in your PHP config.

2. Configure /etc/sd-agent/conf.d/php_fpm.yaml

init_config:

instances:
 - # Get metrics from your FPM pool with this URL
  status_url: http://localhost/status
  # Get a reliable service check of your FPM pool with that one
  ping_url: http://localhost/ping
  # Set the expected reply to the ping.
  ping_reply: pong

• If you have auth enabled on the status page, amend the config file as necessary.

3. 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:

php_fpm
-----
  - 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 php_fpm

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

Monitored metrics

Metric	Values
php_fpm.listen_queue.size Size of the socket queue of pending connections	None / None Type: float
php_fpm.processes.active Total number of active processes	process / None Type: float
php_fpm.processes.idle Total number of idle processes	process / None Type: float
php_fpm.processes.max_reached The number of times the process limit has been reached	process / None Type: float
php_fpm.processes.total Total number of processes	process / None Type: float
php_fpm.requests.accepted Total number of accepted requests	request / None Type: float
php_fpm.requests.slow Total number of sloq requests	request / None Type: float