HAProxy monitoring with Netdata

HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications.

This module will monitor one or more HAProxy instances, depending on your configuration.

Requirements

• HAProxy v2.0+ (or 1.9r1+ for Enterprise users) with enabled PROMEX addon. PROMEX is not built by default with HAProxy. It is provided as an extra component for everyone who wants to use it.

Charts

Current implementation collects only backend metrics.

Backend

• Sessions
  • Current number of active sessions in sessions
  • Sessions rate in sessions/s
• Responses
  • Average response time for last 1024 successful connections in milliseconds
  • HTTP responses by code class in responses/s
• Queue
  • Average queue time for last 1024 successful connections in milliseconds
  • Current number of queued requests in requests
• Network
  • Network traffic in bytes/s

Configuration

Edit the go.d/haproxy.conf configuration file using edit-config from the Netdata config directory, which is typically at /etc/netdata.

cd /etc/netdata # Replace this path with your Netdata config directory

sudo ./edit-config go.d/haproxy.conf

Needs only url to server's /metrics endpoint. Here is an example for 2 servers:

jobs:

- name: local

url: http://127.0.0.1:8404/metrics

- name: remote

url: http://203.0.113.10:8404/metrics

For all available options please see module configuration file.

Troubleshooting

To troubleshoot issues with the haproxy collector, run the go.d.plugin with the debug option enabled. The output should give you clues as to why the collector isn't working.

• First, navigate to your plugins directory, usually at /usr/libexec/netdata/plugins.d/. If that's not the case on your system, open netdata.conf and look for the setting plugins directory. Once you're in the plugin's directory, switch to the netdata user.

cd /usr/libexec/netdata/plugins.d/

sudo -u netdata -s

• You can now run the go.d.plugin to debug the collector:

./go.d.plugin -d -m haproxy