Detailed explanation of nginx installation, deployment and usage on Linux

1. gcc && g++
yum install gcc-c++
2. pcre
yum install -y pcre pcre-devel
3. zlib
yum install -y zlib zlib-devel
4. openssl
yum install -y openssl openssl-devel

1. Unzip the nginx file tar -zxvf nginx-1.17.5.tar.gz
2. Installation## Create an nginx installation directory mkdir nginx
cd nginx-1.12.2
## Specify the file installation path./configure --prefix=/home/lege/nginx
make
make install
#After the installation is complete, the content will be installed to the specified path /home/lege/nginx, otherwise it will be installed in the default directory /usr/local/nginx

## Modify the configuration file cd /home/lege/nginx/conf
vim nginx.conf
## Set the port to 8080, or set it to other listen 8080;
## Enter the startup directory cd /home/lege/nginx/sbin
## Check if there is any problem with the configuration file./nginx -t
##The result without any problem is as follows:
[soa@testsoa04 sbin]$ ./nginx -t
nginx: the configuration file /home/lege/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /home/lege/nginx/conf/nginx.conf test is successful
[soa@testsoa04 sbin]$ 
 
## Query configuration parameters./nginx -V
## For the installed nginx, you need to modify the configuration parameters./configure --prefix=/home/lege/nginx ...Configuration parameters make
make install 
Then restart nginx## Start ./nginx
## Stop ./nginx -s stop
## Restart ./nginx -s reload
## Enter the URL to verify whether it is started successfully http://ip:port/

The format of log definition:
Syntax format: access_log path [format [buffer=size] [gzip[=level]] [flush=time] [if=condition]];
           access_log off;
Default value: access_log logs/access.log combined;
Scope: http, server, location, if in location, limit_except
 
1. Define the log format syntax: log_format name [escape=default|json] string ...;
Default value: log_format combined "...";
Scope: http
 
Common log variables $remote_addr, $http_x_forwarded_for record the client IP address $remote_user record the client user name $request record the requested URL and HTTP protocol (GET, POST, DEL, etc.)
$status records the request status $body_bytes_sent the number of bytes sent to the client, excluding the size of the response header; This variable is compatible with the "%B" parameter in the Apache module mod_log_config.
$bytes_sent The total number of bytes sent to the client.
$connection The serial number of the connection.
$connection_requests The current number of requests received through a connection.
$msec Log writing time. The unit is seconds, and the precision is milliseconds.
$pipe If the request is sent via HTTP pipelining, the pipe value is "p", otherwise it is ".".
$http_referer records the page from which the link was accessed $http_user_agent records client browser related information $request_length The length of the request (including request line, request header and request body).
$request_time Request processing time, in seconds, with millisecond precision; starting from the first byte read from the client until the last character is sent to the client and written to the log.
$time_iso8601 Local time in ISO8601 standard format.
$time_local Local time in common log format.
 
Example:
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
           '$status $body_bytes_sent "$http_referer" "$request_time" '
           '"$http_user_agent" "$http_x_forwarded_for"

#!/bin/bash
#LOGS_PATH is the log storage path LOGS_PATH=/home/lege/data/nginx/logs
YESTERDAY=$(date -d "yesterday" +%Y-%m-%d)
KEEPTIME=$(date -d "-3 days" +%Y-%m-%d)
#Split log files mv ${LOGS_PATH}/access.log ${LOGS_PATH}/access_${YESTERDAY}.log
mv ${LOGS_PATH}/error.log ${LOGS_PATH}/error_${YESTERDAY}.log
#Reread the log through Nginx semaphore control, /web/nginx/ is the nginx installation directory kill -USR1 $(cat /home/lege/data/nginx/logs/nginx.pid)
#Delete the log file from 3 days ago rm -f ${LOGS_PATH}/access_{KEEPTIME}.log
rm -f ${LOGS_PATH}/error_{KEEPTIME}.log
echo 0
 
crontab -e add the following:
0 0 * * * /bin/sh /home/lege/data/nginx/logs/clear.sh
 
crontab -l Check whether the addition is successful

http {
  server_tokens off;
  client_header_buffer_size 8k;
  client_max_body_size 130m;
  proxy_buffer_size 64k;
  proxy_buffers 8 64k;
  log_format access '$remote_addr $host $remote_user [$time_local] $status $request_length $body_bytes_sent $request_time 0 0 0 - "-" "$request" "$http_referer" "$http_user_agent" $http_cookie $bytes_sent';
  access_log logs/access.log access;
  keepalive_requests 16;
  keepalive_timeout 5;
  server {
    listen 8080;
    server_name localhost;
    charset utf-8;
    location / {
      default_type 'application/octet-stream';
      add_header Content-disposition "attachment";
      ## Configure the path of the file that can be downloaded. The following is the path used for testing under Windows. Linux can also be replaced with the corresponding path root D://tools//nginx-1.17.4//conf;
     }
   }
}