Wednesday, June 25, 2014

Enable HAProxy logging on Centos

Enable HAProxy logging on CentOS
By default, HAProxy will not log to files unless we make some modifications
1. Create rsyslog configuration file
nano /etc/rsyslog.d/haproxy.conf
Add these lines to the file
# Enable UDP port 514 to listen to incoming log messages from haproxy
$ModLoad imudp
$UDPServerRun 514
$template Haproxy,"%msg%\n"
local0.=info -/var/log/haproxy/haproxy.log;Haproxy
local0.notice -/var/log/haproxy/admin.log;Haproxy
# don't log anywhere else
local0.* ~
Restart rsyslog service
/etc/init.d/rsyslog restart
Ref: http://blog.hintcafe.com/post/33689067443/haproxy-logging-with-rsyslog-on-linux
2. Modify the log rotate config to match the new folder:
nano /etc/logrotate.d/haproxy
Change
/var/log/haproxy.log {
daily
rotate 10
missingok
[...]
to
/var/log/haproxy/*.log {
daily
rotate 10
missingok
[...]
Now we can check if HAProxy logging is working.
tail -f /var/log/haproxy/haproxy.log

===================================================

global to have these messages end up in /var/log/haproxy.log you will need to:

1) configure syslog to accept network log events. This is done by adding the '-r' option to the SYSLOGD_OPTIONS in /etc/sysconfig/syslog

2) configure local2 events to go to the /var/log/haproxy.log file. A line like the following can be added to /etc/sysconfig/syslog
local2.* /var/log/haproxy.log

In haproxy conf file add
log 127.0.0.1 local2 info

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