[置顶] 详细解释：nginx中ChsHttpLogModule模块配置及各

ngx_http_log_module 实例： log_format gzip '$remote_addr - $remote_user [$time_local] ': '$request $status $bytes_sent ': '$http_referer $http_user_agent $gzip_ratio';access_log /spool/logs/nginx-access.log gzip buffer=32k; access_log 语法

ngx_http_log_module
实例：

log_format  gzip  '$remote_addr - $remote_user [$time_local]  '
: '"$request" $status $bytes_sent '
: '"$http_referer" "$http_user_agent" "$gzip_ratio"';
access_log  /spool/logs/nginx-access.log  gzip  buffer=32k;

access_log
语法： access_log path [format [buffer=size | off ] 默认值： access_log log/access.log combined

作用域： http, server, location

指令 access_log 指派路径、格式和缓存大小。参数 "off" 将清除当前级别的所有 access_log 指令。如果未指定格式，则使用预置的 "combined" 格式。缓存不能大于能写入磁盘的文件的最大大小。在 FreeBSD 3.0-6.0 ，缓存大小无此限制。

log_format
语法： log_format name format [format ...]

默认值： log_format combined "..."

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作用域： http server

Directive log_format describes the format of a log entry. Besides general variables in the format it is possible to use variables which exist only at the moment of record into the log:

$body_bytes_sent, the number of bytes, transmitted to client minus the response headers, variable is compatible with parameter %B of module Apache's mod_log_config (this was called $apache_bytes_sent, before version 0.3.10)
$bytes_sent, the number of bytes, transmitted to client
$connection, the number of connection
$msec, the time with an accuracy to microseconds at the moment of the log entry
$pipe, "p" if request was pipelining
$request_length, the length of the body of the request
$request_time, the time of working on request in seconds
$status, status of answer
$time_local, local time into common log format.
The headers, transmitted to client, begin from the prefix "sent_http_", for example, $sent_http_content_range.

In the configuration there is always a predetermined format "combined":

log_format  combined  '$remote_addr - $remote_user [$time_local]  '
: '"$request" $status $apache_bytes_sent '
: '"$http_referer" "$http_user_agent"';