Monitor HAProxy Server

Overview

HAProxy is a free, very fast and reliable solution offering high availability, load balancing and proxying for TCP and Http-based applications. HAProxy monitoring involves monitoring of the following aspects:

• HAProxy Access Logs
• HAProxy Logs
• HAProxy Metrics

note

The configurations given below apply only to the HAProxy server running on an instance.

Prerequisites

1. Configure HAProxy Access Logs

2. Configure HAProxy Stats

3. Set socket path and enable logs to send desired log file under global section in below haproxy config path.

   Path:/etc/haproxy/haproxy.cfg

   Example

   Global   
    log /dev/log  local0 
    stats socket /run/haproxy/admin.sock mode 660 level admin 
   

1. Configure the HAProxy in following manner to enable server logs.

   • Refer link for configuration of haproxy to send access logs to a log file in centos also configure Rsyslog to collect haproxy logs.
   • Create a directory to run haproxy service using sudo.
     • mkdir /run/haproxy
   • Under listen section add below lines to capture access logs:

     Capture request header User-Agent len 128. 
     
     log-format %ci:%cp\ [%tr]\ %ft\ %b/%s\ %TR/%Tw/%Tc/%Tr/%Ta\ %ST\ %B\ %CC\ %CS\ %tsc\ %ac/%fc/%bc/%sc/%rc\ %sq/%bq\ %hr\ %hs\ %{+Q}r
   

   • Under defaults section add below lines to capture access logs

       log-format %ci:%cp\ [%tr]\ %ft\ %b/%s\ %TR/%Tw/%Tc/%Tr/%Ta\ %ST\ %B\ %CC\ %CS\ %tsc\ %ac/%fc/%bc/%sc/%rc\ %sq/%bq\ %hr\ %hs\ %{+Q}r

• Add below line to frontend configuration to capture requests:
  • capture request header User-Agent len 128.

Configuration

sfAgent section provides steps to install and automatically generate plugin configurations. User can also manually add the configuration shown below to config.yaml under /opt/sfagent/ directory.

key: <profile key> 
generate_name: true 
tags: 
  Name: <unique instance name or will be generated from IP> 
  appName: <add application name> 
  projectName: <add project name> 
metrics: 
  metrics: 
  plugins: 
    - name: haproxy     
      enabled: true     
      interval: 30 
logging: 
  plugins: 
    - name: haproxy-access 
      enabled: true 
      config: 
        geo_info: true 
        log_path: /var/log/haproxy.log 
        ua_parser: false 
    - name: haproxy-general 
      enabled: true 
      config: 
        log_level:
          - emerg 
          - alert 
          - error 
        log_path: /var/log/haproxy.log 

Viewing data and dashboards

Data collected by plugins can be viewed in SnappyFlow’s browse data section under metrics section

plugin: haproxy, haproxy-access, haproxy-general

documentType: frontEndStats, backEndStats, systemInfo, backEndServerDetails, haproxyAccessLogs, haproxyGeneralLogs

Dashboard template: HAProxy_Server, HAProxy_Access

Test Matrix

Ubuntu: HAProxy version (1.6.3)

Centos: HAProxy version (1.5.18)