Nginx Access log (access_log) configuration

Nginx access logs are controlled by two main parameters

Log_format #用来定义记录日志的格式 (can define a variety of log formats, take different names can be)

Access_log #用来指定日至文件的路径及使用的何种日志格式记录日志

Default value for Lof_format:

#    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '#                      '$status $body_bytes_sent "$http_referer" '#                      '"$http_user_agent" "$http_x_forwarded_for"';

Default value for Access_log:

#access_log  logs/access.log  main;

Log_format syntax format and parameter syntax are described below:

 log_format    <NAME>    <Strin---g>;    关键字         格式标签   日志格式    关键字：其中关键字error_log不能改变    格式标签：格式标签是给一套日志格式设置一个独特的名字    日志格式：给日志设置格式 log_format格式变量：    $remote_addr  #记录访问网站的客户端地址    $remote_user  #远程客户端用户名    $time_local  #记录访问时间与时区    $request  #用户的http请求起始行信息    $status  #http状态码，记录请求返回的状态码，例如：200、301、404等    $body_bytes_sent  #服务器发送给客户端的响应body字节数    $http_referer  #记录此次请求是从哪个连接访问过来的，可以根据该参数进行防盗链设置。    $http_user_agent  #记录客户端访问信息，例如：浏览器、手机客户端等    $http_x_forwarded_for  #当前端有代理服务器时，设置web节点记录客户端地址的配置，此参数生效的前提是代理服务器也要进行相关的x_forwarded_for设置

Access_log syntax format and parameter syntax are described below:

    access_log    <FILE>    <NAME>;    关键字         日志文件   格式标签     关键字：其中关键字error_log不能改变    日志文件：可以指定任意存放日志的目录    格式标签：给日志文件套用指定的日志格式其他语法：    access_log    off;  #关闭access_log，即不记录访问日志    access_log path [format [buffer=size [flush=time]] [if=condition]];    access_log path format gzip[=level] [buffer=size] [flush=time] [if=condition];    access_log syslog:server=address[,parameter=value] [format [if=condition]];    说明：    buffer=size  #为存放访问日志的缓冲区大小    flush=time  #为缓冲区的日志刷到磁盘的时间    gzip[=level]  #表示压缩级别    [if = condition]  #表示其他条件

These parameters are not configurable in the general scenario and can be considered by extreme optimizations. Lof_format the label segment position of the parameter:

http

Access_log the label segment position of the parameter:

HTTP, server, location, if on location, limit_except

参考资料：http://nginx.org/en/docs/http/ngx_http_log_module.html

Nginx Configuration Access Log procedure:

(1) Create LOG_FORMAT statement

worker_processes  1;error_log logs/error.log error;events {    worker_connections  1024;}http {    include status.conf;    include       mime.types;    default_type  application/octet-stream;    sendfile        on;    keepalive_timeout  65;    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '                               '$status $body_bytes_sent "$http_referer" '                               '"$http_user_agent" "$http_x_forwarded_for"';    access_log  logs/access.log  main;    server {        listen       80;        server_name  localhost;                rewrite ^/.* http://www.wl.com permanent;    }    include vhost/*.conf;}

(2) Insert Access_log statement

server {        access_log /data/log/www;        listen 80;        server_name abc.com www.wl.com;        location / {                root /data/www/www;                index index.html index.htm;        }        error_log    logs/error_www.wl.com.log    error;        access_log    logs/access_www.wl.com.log    main;        #新增内容↑}

(3) Restart service

nginx -tnginx -s reload

Nginx Access log (access_log) configuration