配置文件 proxy_set_header -发往后端服务器的请求头---- nginx日志设置级别调试技巧 - 长连接配置

http {
    include       mime.types;
    default_type  application/octet-stream; sendfile on;
    #tcp_nopush     on; #keepalive_timeout 0;
    keepalive_timeout  65; server_tokens off;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"'
                       '$upstream_addr $upstream_response_time $request_time ';

---------------------------------------------------------- 经典日志设置级别--得到关键情报

2、访问日志

[Access.log]
log_format main '$remote_addr '$status $upstream_status '"$http_user_agent" $ssl_protocol $ssl_cipher $upstream_addr ’
‘$request_time $upstream_response_time’;

---------------------------------------------------------- 经典日志设置级别--得到关键情报

http {
    include       mime.types;
    default_type  application/octet-stream;
    log_format main  '$remote_addr - $remote_user [$time_local] "$request" '
                 '$request_time $request_length '
                 '$status $body_bytes_sent "$http_referer" '
                 '"$http_user_agent"';
    access_log /var/logs/nginx/access.log main;

    keepalive_timeout  0;

参考： https://help.aliyun.com/document_detail/28988.html?spm=a2c4g.11186623.2.12.7a8018ceN8PjJk#reference-kv2-sr5-vdb

---------------------------------------------------------- 经典日志设置级别--得到关键情报

server {
    listen 80;
    server_name  paas.service.consul;

    client_max_body_size    512m;
    access_log  /data/bkdata/bkce/logs/nginx/paas_inner_access.log;

    # ============================ paas ============================
    # PAAS_SERVICE HOST/PORT

   
 location ~ ^/login/(.*) {
        proxy_pass http://OPEN_PAAS_LOGIN/$1$is_args$args;
        proxy_pass_header Server;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Scheme $scheme;
        proxy_set_header Host $http_host;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Host $http_host;
        proxy_redirect off;
        proxy_read_timeout 600;
    }

#user  root;
worker_processes  auto;

error_log  /usr/local/var/log/nginx/error.log;
#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}

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

    client_max_body_size 2G;
    server_names_hash_bucket_size 256;

    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"' '$upstream_addr $upstream_response_time $request_time '; 
    access_log logs/access.log main;
    underscores_in_headers on;
    include /usr/local/etc/nginx/conf.d/*.conf;
}

 2.长连接需要配置

 proxy_http_version 1.1;

proxy_set_header Connection "";  #如果没加，后端服务器会收到 Connection: close 的 Header，而不能复用连接； 清空connection的请求头，避免客户端传递短链接的请求头信息。

https://www.jianshu.com/p/fd16b3d10752

1.调试rewrite规则

调试rewrite规则时，如果规则写错只会看见一个404页面，可以在配置文件中开启nginx rewrite日志，进行调试。

server {
        error_log    /var/logs/nginx/example.com.error.log;
        rewrite_log on;
}

rewrite_log on; 开启后，它将发送所有的 rewrite 相关的日志信息到 error_log 文件中，使用 [notice] 级别。随后就可以在error_log 查看rewrite信息了。

2.使用location记录指定URL的日志

server {
        error_log    /var/logs/nginx/example.com.error.log;
        location /static/ { 
        error_log /var/logs/nginx/static-error.log debug; 
    }         
}

配置以上配置后，/static/ 相关的日志会被单独记录在static-error.log文件中。

nginx日志共三个参数
access_log: 定义日志的路径及格式。
log_format: 定义日志的模板。
open_log_file_cache: 定义日志文件缓存。

proxy_set_header X-Forwarded-For ：如果后端Web服务器上的程序需要获取用户IP，从该Header头获取。proxy_set_header X-Forwarded-For $remote_addr;

用一个例子来演示会更加清晰