HAproxy增加日志记录功能和自定义日志输出内容、格式

http://blog.51cto.com/eric1/1854574

一.增加haproxy日志记录功能

 

1.1 由于数据分析的需要，我们必须打开haproxy日志，记录相关信息。

在配置前，我们先来了解一下日志的level:local0～local7 16～23保留为本地使用

emerg 0 系统不可用
     alert 1 必须马上采取行动的事件
     crit 2 关键的事件
     err 3 错误事件
     warning 4 警告事件
     notice 5 普通但重要的事件
     info 6 有用的信息
     debug 7 调试信息

1.2 实际配置：

########################################

vi haproxy.conf(在default处添加如下信息)
defaults
log global
option httplog
log 127.0.0.1 local6
########################################

rsyslog配置

###

# vim /etc/rsyslog.conf
#由于haproxy的日志是用udp传输的,所以要启用rsyslog的udp监听
# Provides UDP syslog reception
$ModLoad imudp
$UDPServerRun 514

#启用级别为local2的设备,并将该设备的所有级别的日志全部输出到/var/log/haproxy.log下
local6.* /var/log/haproxy.log

###

#######################################

vi /etc/rsyslog.conf(添加如下内容)
local3.* /data/logs/haproxy.log
#######################################

#######################################

vi /etc/sysconfig/rsyslog

把SYSLOGD_OPTIONS="-m 0"
改成 SYSLOGD_OPTIONS="-r -m 0 -c 2"
#######################################

相关解释说明:
-r:打开接受外来日志消息的功能,其监控514 UDP端口;
-x:关闭自动解析对方日志服务器的FQDN信息,这能避免DNS不完整所带来的麻烦;
-m:修改syslog的内部mark消息写入间隔时间(0为关闭),例如240为每隔240分钟写入一次"--MARK--"信息;
-h:默认情况下,syslog不会发送从远端接受过来的消息到其他主机,而使用该选项,则把该开关打开,所有
接受到的信息都可根据syslog.conf中定义的@主机转发过去

配置完毕后重启rsyslogd和haproxy即可.

日志内容如下：

Sep 18 15:48:11 localhost haproxy[12124]: Proxy html-server started.
Sep 18 15:48:11 localhost haproxy[12124]: Proxy html-server started.
Sep 18 15:48:29 localhost haproxy[12125]: 10.69.112.139:59244 [18/Sep/2016:15:48:29.027] http-in html-server/html-A 0/0/0/0/0 200 254 - - --NI 0/0/0/0/0 0/0 "GET / HTTP/1.1"
Sep 18 15:48:29 localhost haproxy[12125]: 10.69.112.139:59244 [18/Sep/2016:15:48:29.027] http-in html-server/html-A 0/0/0/0/0 200 254 - - --NI 0/0/0/0/0 0/0 "GET / HTTP/1.1"
Sep 18 15:48:29 localhost haproxy[12125]: 10.69.112.139:59244 [18/Sep/2016:15:48:29.027] http-in html-server/html-A 0/0/0/0/0 200 254 - - --NI 0/0/0/0/0 0/0 "GET / HTTP/1.1"

 

但日志可读性很差，我们需要显示更多的信息，但默认的都捕获不到，只能自定义需要显示的内容了。

二.定义haproxy日志输出内容和格式

2.1自定义haproxy日志。直接上配置文件。

global
    log 127.0.0.1 local3 info
    maxconn 4096
    chroot /gomeo2o/haproxy
    uid haproxy
    gid haproxy
    daemon
    nbproc 1
    description haproxy
    pidfile /var/run/haproxy.pid
defaults
    log global
#    option httplog
    balance roundrobin
    mode http
    maxconn 4096
    retries 3
    option redispatch
    option forceclose
    option dontlognull
    option abortonclose
    stats uri /haproxy
frontend http-in
    bind 0.0.0.0:80
    mode http
    log global
    option httplog
    option httpclose
    acl html url_reg -i \.html$
    use_backend html-server if html
    default_backend html-server 

#((
    capture request header Host len 64
    capture request header User-Agent len 128
    capture request header X-Forwarded-For len 100
    capture request header Referer len 200
    capture response header Server len 40
    capture response header Server-ID len 40
    #capture捕获信息
    log-format %ci:%cp\ %si:%sp\ %B\ %U\ %ST\ %r\ %b\ %f\ %bi\ %hrl\ %hsl\
        #log-forcat定义日志需显示内容(变量)
        #利用capture捕获信息，log-forcat定义变量
        #详解请见2.1和2.2
#))

backend html-server
    mode http
    balance roundrobin
    option httpchk GET /index.html
    cookie SERVERID insert indirect nocache
    server html-A 10.69.112.150:80 weight 1 cookie 3 check inter 2000 rise 2 fall 5
    server html-B 10.69.112.148:80 weight 1 cookie 4 check inter 2000 rise 2 fall 5

 

其他参数在此不做过多解释，主要查看两个中括号之间的内容。

2.2 capture捕获

haproxy利用capture捕获请求(request)和响应(response)信息，具体需捕获内容可以做如下操作：

用浏览器访问一个网站(我用的google),比如www.gomeplus.com,按F12，内容如下(注意我红色框起来的部分)：

找到response headers项，这里就是你可以捕获的信息。比如捕获server和server-id：

capture response header Server len 40
capture response header Server-ID len 40

 

备注：2.1配置文件当中的capture基本的信息都能捕获到了，如有特别需求，请查阅官网(capture到底能捕获多少信息，多详细，我也在查询当中)。

2.3 定义log-format变量

定义示例：

log-format %T\ %t\ Some\ Text
log-format %{+Q}o\ %t\ %s\ %{-Q}r

 

请参阅下面的表为定义的变量(转自官方文档)：

 +---+------+-----------------------------------------------+-------------+
  | R | var  | field name (8.2.2 and 8.2.3 for description)  | type        |
  +---+------+-----------------------------------------------+-------------+
  |   | %o   | special variable, apply flags on all next var |             |
  +---+------+-----------------------------------------------+-------------+
  |   | %B   | bytes_read           (from server to client)  | numeric     |
  | H | %CC  | captured_request_cookie                       | string      |
  | H | %CS  | captured_response_cookie                      | string      |
  |   | %H   | hostname                                      | string      |
  | H | %HM  | HTTP method (ex: POST)                        | string      |
  | H | %HP  | HTTP request URI without query string (path)  | string      |
  | H | %HQ  | HTTP request URI query string (ex: ?bar=baz)  | string      |
  | H | %HU  | HTTP request URI (ex: /foo?bar=baz)           | string      |
  | H | %HV  | HTTP version (ex: HTTP/1.0)                   | string      |
  |   | %ID  | unique-id                                     | string      |
  |   | %ST  | status_code                                   | numeric     |
  |   | %T   | gmt_date_time                                 | date        |
  |   | %Tc  | Tc                                            | numeric     |
  |   | %Td  | Td = Tt - (Tq + Tw + Tc + Tr)                 | numeric     |
  |   | %Tl  | local_date_time                               | date        |
  | H | %Tq  | Tq                                            | numeric     |
  | H | %Tr  | Tr                                            | numeric     |
  |   | %Ts  | timestamp                                     | numeric     |
  |   | %Tt  | Tt                                            | numeric     |
  |   | %Tw  | Tw                                            | numeric     |
  |   | %U   | bytes_uploaded       (from client to server)  | numeric     |
  |   | %ac  | actconn                                       | numeric     |
  |   | %b   | backend_name                                  | string      |
  |   | %bc  | beconn      (backend concurrent connections)  | numeric     |
  |   | %bi  | backend_source_ip       (connecting address)  | IP          |
  |   | %bp  | backend_source_port     (connecting address)  | numeric     |
  |   | %bq  | backend_queue                                 | numeric     |
  |   | %ci  | client_ip                 (accepted address)  | IP          |
  |   | %cp  | client_port               (accepted address)  | numeric     |
  |   | %f   | frontend_name                                 | string      |
  |   | %fc  | feconn     (frontend concurrent connections)  | numeric     |
  |   | %fi  | frontend_ip              (accepting address)  | IP          |
  |   | %fp  | frontend_port            (accepting address)  | numeric     |
  |   | %ft  | frontend_name_transport ('~' suffix for SSL)  | string      |
  |   | %lc  | frontend_log_counter                          | numeric     |
  |   | %hr  | captured_request_headers default style        | string      |
  |   | %hrl | captured_request_headers CLF style            | string list |
  |   | %hs  | captured_response_headers default style       | string      |
  |   | %hsl | captured_response_headers CLF style           | string list |
  |   | %ms  | accept date milliseconds (left-padded with 0) | numeric     |
  |   | %pid | PID                                           | numeric     |
  | H | %r   | http_request                                  | string      |
  |   | %rc  | retries                                       | numeric     |
  |   | %rt  | request_counter (HTTP req or TCP session)     | numeric     |
  |   | %s   | server_name                                   | string      |
  |   | %sc  | srv_conn     (server concurrent connections)  | numeric     |
  |   | %si  | server_IP                   (target address)  | IP          |
  |   | %sp  | server_port                 (target address)  | numeric     |
  |   | %sq  | srv_queue                                     | numeric     |
  | S | %sslc| ssl_ciphers (ex: AES-SHA)                     | string      |
  | S | %sslv| ssl_version (ex: TLSv1)                       | string      |
  |   | %t   | date_time      (with millisecond resolution)  | date        |
  |   | %ts  | termination_state                             | string      |
  | H | %tsc | termination_state with cookie status          | string      |
  +---+------+-----------------------------------------------+-------------+

 

最后查看定义之后的日志内容输出：

Sep 20 17:06:12 localhost haproxy[16372]: 10.69.112.139:39957 10.69.112.148:80 2614 179 200 GET / HTTP/1.1 html-server http-in 10.69.112.151 www.qiang999.com curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.19.1 Basic ECC zlib/1.2.3 libidn/1.18 libssh2/1.4.2 - - nginx/1.9.8 -\
Sep 20 17:06:12 localhost haproxy[16372]: 10.69.112.139:39957 10.69.112.148:80 2614 179 200 GET / HTTP/1.1 html-server http-in 10.69.112.151 www.qiang999.com curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.19.1 Basic ECC zlib/1.2.3 libidn/1.18 libssh2/1.4.2 - - nginx/1.9.8 -\
Sep 20 17:06:12 localhost haproxy[16372]: 10.69.112.139:39966 10.69.112.150:80 254 179 200 GET / HTTP/1.1 html-server http-in 10.69.112.151 www.qiang999.com curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.19.1 Basic ECC zlib/1.2.3 libidn/1.18 libssh2/1.4.2 - - nginx/1.9.8 -\
Sep 20 17:06:12 localhost haproxy[16372]: 10.69.112.139:39966 10.69.112.150:80 254 179 200 GET / HTTP/1.1 html-server http-in 10.69.112.151 www.qiang999.com curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.19.1 Basic ECC zlib/1.2.3 libidn/1.18 libssh2/1.4.2 - - nginx/1.9.8 -\
Sep 20 17:06:13 localhost haproxy[16372]: 10.69.112.139:39974 10.69.112.148:80 2614 179 200 GET / HTTP/1.1 html-server http-in 10.69.112.151 www.qiang999.com curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.19.1 Basic ECC zlib/1.2.3 libidn/1.18 libssh2/1.4.2 - - nginx/1.9.8 -\