Monitoring HTTP

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

Installing the http plugin package

Install the http plugin on Debian/Ubuntu:

sudo apt-get install sd-agent-http-check

Install the http plugin on RHEL/CentOS:

sudo yum install sd-agent-http-check

Read more about agent plugins.

Configuring the agent to collect swap metrics

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


  - name: Example website
    # disable_ssl_validation: false      # default is true, so set false to check SSL validation
    # ca_certs: /path/to/ca/file         # e.g. /etc/ssl/certs/ca-certificates.crt
    # check_certificate_expiration: true # default is true
    # timeout: 3                         # in seconds. Default is 1.
  - name: Example website (staging)

2. Restart the agent

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


sudo systemctl restart sd-agent

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

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


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

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

  - 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/ check http_check

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


Monitored metrics

Metric Values

Days until SSL certificate expiration
day / None
Type: float

The response time of an HTTP request to a given url, tagged by url, e.g. 'url:'.
second / None
Type: float

Whether the check can connect, 1 if true, 0 otherwise. Tagged by url, e.g. 'url:'.
None / None
Type: int

Whether the check failed to connect, 1 if true, 0 otherwise. Tagged by url, e.g. 'url:'.
None / None
Type: int
Was this article helpful?
0 out of 0 found this helpful
Have more questions? Submit a request


Monday  —  Friday.

10am  —  6pm UK.

Dedicated Support.