Common Nginx logs and configuration methods in PHP

The content of this article is about common Nginx logs and setting methods. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Preface

As a programmer, something a little more important than coding is log analysis and query. Common logs and setting methods are listed below.

Configuration file

nginx is divided into two logs: access_log and error_log

The settings need to be in nginx.conf, and the default is passed The source code package compilation and installation nginx directory should be in the

/usr/local/nginx

directory. If you install it through yum or other methods and do not know or do not know the specific nginx installation directory, you can use

find / -name nginx.conf

or

nginx -V | grep prefix
-------------
nginx version: nginx/1.13.9
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/usr/local/nginx --with-http_ssl_module

Open access log

If your source code package is installed by default, open the path as follows

vim /usr/local/nginx/nginx.conf

Find the following content

http {
    include       mime.types;
    default_type  application/octet-stream;

    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;
    
    ...
}

Change log_format Just open the comment of access_log. Log_format can define the log specifications of nginx.

log_format default specification parameter table

Name	Annotation
$remote_addr	Client/user IP address
$time_local	Access time
$request	Request method Request address
$status	The request status code is consistent with the HTTP status code
$body_bytes_sent	The requested address size is calculated in bytes format
$http_referer	Request source, from what Local access
$http_user_agent	User information (browser information)
$http_x_forwarded_for	Forward IP address

Enable error log

If your source code package is installed by default, open the path as follows

vim /usr/local/nginx/nginx.conf

Find the following content

error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

Just delete the annotation. You can store different error types separately. For example,

error_log logs/error.log notice;

notice is an error type. If you don’t write it, it will be all.

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