Send metrics

The Send Metrics module streams HAProxy Enterprise metrics to an external program. You can configure which fields to include in the data.

Install the Send Metrics module Jump to heading #

1. Install the module using your package manager:

   apt yum zypper pkg

   nix
   sudo apt-get install hapee-2.9r1-lb-send-metrics

   nix
   sudo apt-get install hapee-2.9r1-lb-send-metrics

   nix
   sudo yum install hapee-2.9r1-lb-send-metrics

   nix
   sudo yum install hapee-2.9r1-lb-send-metrics

   nix
   sudo zypper install hapee-2.9r1-lb-send-metrics

   nix
   sudo zypper install hapee-2.9r1-lb-send-metrics

   nix
   sudo pkg install hapee-2.9r1-lb-send-metrics

   nix
   sudo pkg install hapee-2.9r1-lb-send-metrics

2. Update the global section of your configuration to send the data:

   haproxy
   global
     module-path /opt/hapee-2.9/modules
     module-load hapee-lb-send-metrics.so
     send-metrics-url POST http://192.168.0.1:8000/metrics/  xdelay 1m 5s 1s 1s  timeout 100ms  retries 3  log
     send-metrics-content-type application/json
     send-metrics-data '{ "Hostname": "%H", "Date": "%T", "connections": "%ac" }'
     send-metrics-header 'X-APIKey: abcd1234'

   haproxy
   global
     module-path /opt/hapee-2.9/modules
     module-load hapee-lb-send-metrics.so
     send-metrics-url POST http://192.168.0.1:8000/metrics/  xdelay 1m 5s 1s 1s  timeout 100ms  retries 3  log
     send-metrics-content-type application/json
     send-metrics-data '{ "Hostname": "%H", "Date": "%T", "connections": "%ac" }'
     send-metrics-header 'X-APIKey: abcd1234'

   In this example, we:

   • sends data at a 1 minute interval to the URL http://192.168.0.1:8000/metrics/ using an HTTP POST request.
   • format the data as JSON.
   • sends the server’s hostname, the date, and the current number of active connections.
   • attaches an HTTP header named X-APIKey to the request.

   See the section below for an explanation of each directive and its parameters.

Global directives Jump to heading #

The Send Metrics module enables the following directives in the global section.

send-metrics-url Jump to heading #

The send-metrics-url directive is required. It tells the load balancer to send metrics data over HTTP to a specified URL.

Syntax:

send-metrics-url POST <url> [delay <u> | xdelay <u s b r>] [timeout <t>] [retries <n>] [log] [dontlog-normal]

where:

send-metrics-data Jump to heading #

The send-metrics-data directive is required. It sets the data to send to the selected HTTP server. You can set individual log variables within the data, prefixed with %.

send-metrics-content-type Jump to heading #

• The send-metrics-content-type directive allows the module to set the Content-Type header when sending data, including and limited to the content types listed below. If unspecified, the module uses the application/octet-stream Content-Type.

Supported content types are:

• application/json
• application/octet-stream
• application/x-www-form-urlencoded
• text/plain

send-metrics-header Jump to heading #

The send-metrics-header directive allows the module to set additional HTTP headers within the HTTP POST request.

send-metrics-debug Jump to heading #

The send-metrics-debug directive sets the debug level. Use this only when the module runs in debug mode; in normal use, it has no significance. Default: level 7.

Runtime API Jump to heading #

The following Runtime API commands are available:

lb-send-metrics show-data Jump to heading #

The lb-send-metrics show-data command serves to check the operation of the module by printing the content the module sent to the selected HTTP server.

lb-send-metrics status Jump to heading #

The lb-send-metrics status command displays the module’s status.

lb-send-metrics update Jump to heading #

The lb-send-metrics update [delay] command runs the update at a time specified with the delay setting. If unspecified (or the delay is 0), the update executes immediately. The delay cannot exceed the time until the next regular update.

lb-send-metrics debug Jump to heading #

The lb-send-metrics debug [level] command sets the debug level. You can use this only when the module runs in debug mode; in normal use it has no significance. Default: level 7.