Haproxy SNMP

Overview

HAProxy is an open source software allowing high availability, load balancing and proxying solutions for TCP and HTTP-based applications.

The Centreon Monitoring Connector Haproxy SNMP aims to collect backend/frontend status and sessions and traffic statistics using the SNMP protcol.

Pack assets

Monitored objects

• Frontend usage

• Backend usage

Collected metrics & status

Frontend-Usage

Metric name	Description	Unit
status	Frontend status
frontend.sessions.current.count	Number of current sessions	count
frontend.sessions.total.count	Number of total sessions	count
frontend.traffic.in.bitpersecond	Incomming frontend traffic	b/s
frontend.traffic.out.bitpersecond	Outgoing frontend traffic	b/s

Backend-Usage

Metric name	Description	Unit
status	Backend status
backend.queue.current.count	Number of current request in queue	count
backend.sessions.current.count	Number of current sessions	count
backend.sessions.total.count	Number of total sessions	count
backend.traffic.in.bitpersecond	Incomming backend traffic	b/s
backend.traffic.out.bitpersecond	Outgoing backend traffic	b/s

Prerequisites

To use this pack, the SNMP service must be properly configured on your HAProxy server. HAProxy provides an official documentation to achieve this: https://www.haproxy.com/documentation/hapee/latest/observability/metrics/snmp/

Setup

Online License

1. Install the Centreon package on every Centreon poller expected to monitor HAProxy ressources:

yum install centreon-plugin-Applications-Haproxy-Snmp

2. On the Centreon Web interface, install the Haproxy SNMP Centreon Monitoring Connector on the Configuration > Monitoring Connector Manager page

Offline License

1. Install the Centreon package on every Centreon poller expected to monitor HAProxy ressources:

yum install centreon-plugin-Applications-Haproxy-Snmp

2. Install the Haproxy SNMP Centreon Monitoring Connector RPM on the Centreon Central server:

yum install centreon-pack-applications-haproxy-snmp

3. On the Centreon Web interface, install the Haproxy SNMP Centreon Monitoring Connector on the Configuration > Monitoring Connector Manager page

Configuration

Host

• Log into Centreon and add a new Host through "Configuration > Hosts".
• Fill the "Name", "Alias" & "IP Address / DNS" fields according to your HAProxy Server settings
• Select the Applications-Haproxy-Snmp-custom template to apply to the Host

I> When using SNMP v3, use the SNMPEXTRAOPTIONS Macro to add specific authentication parameters

More information in the Troubleshooting SNMP section.

Mandatory	Name	Description
	SNMPEXTRAOPTIONS	Configure your own SNMPv3 credentials combo

How to check in the CLI that the configuration is OK and what are the main options for ?

Once the plugin installed, log into your Centreon Poller CLI using the centreon-engine user account and test the Plugin by running the following command:

/usr/lib/centreon/plugins//centreon_haproxy_snmp.pl  \
   --plugin=apps::haproxy::snmp::plugin   \
   --mode=frontend-usage  \
   --hostname='10.0.0.1'  \
   --snmp-version='2c'  \
   --snmp-community='my-snmp-community'   \
   --filter-name=''  \
   --warning-status=''  \
   --critical-status='%\{status\} !~ /OPEN/i'  \
   --warning-total-sessions=''  \
   --critical-total-sessions=''  \
   --warning-current-sessions=''  \
   --critical-current-sessions=''  \
   --warning-traffic-in=''  \
   --critical-traffic-in=''  \
   --warning-traffic-out=''  \
   --critical-traffic-out=''  \
   --use-new-perfdata
   --verbose \
   --use-new-perfdata

Expected command output is shown below:

OK : All frontends are ok | 'frontend.sessions.current.count'=9000;;;; 'frontend.sessions.total.count'=9000;;;; 'frontend.traffic.in.bitpersecond'=9000b/s;;;; 'frontend.traffic.out.bitpersecond'=9000b/s;;;;

This command would trigger a CRITICAL alarm if the status of the frontend is different than 'OPEN' (--critical-status='%{status} !~ /OPEN/i').

All available options for a given mode can be displayed by adding the --help parameter to the command:

/usr/lib/centreon/plugins//centreon_haproxy_snmp.pl  \
   --plugin=apps::haproxy::snmp::plugin   \
   --mode=frontend-usage  \
   --help

All available options for a given mode can be displayed by adding the --list-mode parameter to the command:

/usr/lib/centreon/plugins//centreon_haproxy_snmp.pl  \
   --plugin=apps::haproxy::snmp::plugin   \
   --list-mode

Troubleshooting

UNKNOWN: SNMP GET Request : Timeout

If you get this message, you're probably facing one of theses issues:

• Your SNMP server isn't started or misconfigured

• An external device is blocking your request (firewall, ...)

UNKNOWN: SNMP GET Request : Cant get a single value.

This message generally means that SNMP privileges are not wide enough for the mode/plugin to work properly.