The issue of open access log nginx configuration files, but not written to a log file and content - Linux

One, scene reconstruction

1, the configuration file /nginx/conf/nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}


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"';

    sendfile        on;

    keepalive_timeout  65;

    server {
        listen       80;
        server_name  localhost;

        location / {
            root   html;
            index  index.html index.htm;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }

    include sites-enabled/*.conf;
}

2, a single project profiles /nginx/conf/sites-enabled/jean.conf

server {
  listen 80;

  server_name www.jean.com;
  root /mine/serve/project;

  location ~* \.(jpg|jpeg|gif|css|png|js|ico|html)$ {
    access_log off;
    expires max;
  }

  access_log  logs/access.jean.log  main;

  location / {
        index index.html;
        autoindex on;
        autoindex_exact_size on;
        autoindex_localtime on;
  }

  location ~ /\.ht {
    deny  all;
  }

  location ~ \.sh$ {
    deny  all;
  }
}

3, test configuration

[root@192 sbin]# ./nginx -t
nginx: the configuration file /mine/serve/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /mine/serve/nginx/conf/nginx.conf test is successful

4, access to domain name 
normal output!

5, view the log 
does not generate a log file

[root@192 logs]# ls
access.log  error.log  nginx.pid

Second, identify problems

1, when the project profiles /nginx/conf/sites-enabled/jean.conf

#可疑代码行
=-----------------------------------------------------=
  location ~* \.(jpg|jpeg|gif|css|png|js|ico|html)$ {
    access_log off;
    expires max;
  }
=-----------------------------------------------------=

Note: The above code means that all access is jpg | jpeg | gif | png, css | js | ico, html file, not written to the log, the cache is to maintain maximum!

2, problem solving 
comment out the "access_log off;" this line: "# access_log off;", and then restart nginx service 
and will nginx.conf file, define log_format command line to open (remove the preceding "#")

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

3, once again visit the domain name, view the log 
and sure enough, log generation

[root@192 logs]# ls
access.jean.log  access.log  error.log  nginx.pid

[root@192 logs]# ll
总用量 12
-rw-r--r--. 1 root root  194 11月 23 09:58 access.jean.log
-rw-r--r--. 1 root root    0 11月 23 03:12 access.log
-rw-r--r--. 1 root root 1442 11月 23 09:58 error.log
-rw-r--r--. 1 root root    4 11月 23 03:12 nginx.pid

The content is written! ! 

4, it may be argued that the "access_log logs / access.jean.log main;" put [the line] # suspicious code above, can not I? No, creates a access.jean.log file, however, does not write content!

Third, the problem summary

About log error, generally there are two problems: 
1, is on the log, but did not generate a log, this situation, first of all, make sure you have not turned on the log command line, such as "access_log logs / access.jean.log main;" , there are, then look at your main configuration file nginx.conf and project profiles "/nginx/conf/sites-enabled/jean.conf" there is no "access_log off;" command line, if so, commented, restart nginx service generally no problem. 
2, reported "nginx: [emerg]" log_format "directive is allowed here in /mine/serve/nginx/conf/sites-enabled/jean.conf:13 not" this error, commonly defined "log_format" must be nginx .conf file, the default is annotated to open about this format, you can also customize the configuration file in nginx.conf, then, in your project configuration file. 
3 In addition, the log format "log_format" definition, can not be defined in the project configuration file, such as "/nginx/conf/sites-enabled/jean.conf", otherwise, there will be an error!