haproxy软件的日志如何输出到指定文件
作者：忍冬行者
本文介绍了如何将haproxy的日志从系统syslog中分离出来,并独立记录到不同的日志文件中,通过修改rsyslog配置文件和haproxy配置文件,可以实现这一目标,并便于后期的日志管理和分析
haproxy软件日志输出到指定文件
默认haproxy的日志是输出到系统syslog中，查看起来不是非常方便，为了更好的管理haproxy的日志，我们在生产环境中一般单独定义出来。需要将haproxy的info及notice日志分别记录到不同的日志文件中。
需要修改rsyslog配置，为了便于管理。
将haproxy相关的配置独立定义到haproxy.conf，并放到/etc/rsyslog.d/下，rsyslog启动时会自动加载此目录下的所有配置文件。
默认的haproxy的配置文件
如下
#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
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
#
log 127.0.0.1 local2 info
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 40000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
#frontend main *:5000
# acl url_static path_beg -i /static /images /javascript /stylesheets
# acl url_static path_end -i .jpg .gif .png .css .js
#
# use_backend static if url_static
# default_backend app
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
#backend static
# balance roundrobin
# server static 127.0.0.1:4331 check
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
#backend app
# balance roundrobin
# server app1 127.0.0.1:5001 check
# server app2 127.0.0.1:5002 check
# server app3 127.0.0.1:5003 check
# server app4 127.0.0.1:5004 check其中日志的配置文件有关日志的配置是 log 127.0.0.1 local2 info
为了便于管理将haproxy相关的配置独立定义到haproxy.conf
配置方式
1.编辑“/etc/sysconfig/rsyslog”文件
将如下配置增加 -r 参数：
SYSLOGD_OPTIONS="" 改成 SYSLOGD_OPTIONS="-r"
2.编辑“/etc/rsyslog.conf”取消红框部分内容的注释
并在“local7.*”前面插入一行：
local2.* /var/log/haproxy/haproxy.log
3.重启服务
重启 rsyslog
systemctl restart rsyslog
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。