Full parsing of Nginx forward proxy and reverse proxy and configuration files

server {
    listen 3128;                      # Listen to the port    resolver 8.8.8.8;                 # DNS resolution server    location / {
        proxy_pass http://$http_host;  # Forward all requests    }
}

server {
    listen 80;
    server_name ;
    location / {
        proxy_pass http://backend_server;  # Forward to the backend cluster        proxy_set_header Host $host;       # Pass the original domain name    }
}

# Global Block (Main Context)user nginx;
worker_processes auto;
# events block (Events Context)events {
    worker_connections 1024;
}
# http block (HTTP Context)http {
    # HTTP global configuration    include ;
    # server block (virtual host)    server {
        # server block configuration        listen 80;
        # location block (request path matching)        location / {
            root /var/www/html;
        }
    }
}
# stream block (TCP/UDP proxy, optional)stream {
    server {
        listen 3306;
        proxy_pass backend_mysql;
    }
}

user nginx;                     # Users and groups running Nginx (Safety Required)worker_processes auto;          # Number of worker processes (recommended to set as the number of CPU cores)error_log /var/log/nginx/ warn;  # Error log path and level (debug/info/Notice/warn/error)pid /var/run/;        # Store the main processPIDFile path

events {
    worker_connections 1024;   # Maximum number of concurrent connections for a single worker process (total concurrency = worker_processes × worker_connections)    use epoll;                 # Event model (Linux recommends epoll, freeBSD uses kqueue)    multi_accept on;           # Accept all new connections at once    accept_mutex off;          # It is recommended to turn off the mutex lock (reduce context switching) when high concurrency is high}

http {
    # Basic configuration    include /etc/nginx/;      # Contains MIME type definition file    default_type application/octet-stream;  # Default response type (used when unknown file type)    # Log configuration    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" "$http_user_agent"';
    access_log /var/log/nginx/ main;  # Access log path and format    error_log /var/log/nginx/ warn;
    # Performance optimization    sendfile on;                # Enable efficient file transfer mode    tcp_nopush on;              # Only valid when sendfile is enabled to reduce the number of network packets    keepalive_timeout 65;       # Long connection timeout (units of seconds)    client_max_body_size 100m;  # Maximum limit on client request body (dDoS prevention)    # Compress configuration    gzip on;
    gzip_types text/plain text/css application/json;
    # Security enhancement    server_tokens off;          # Hide Nginx version number}

server {
    listen 80;                  # Listen port (you can specify IP, such as listen 192.168.1.1:80)    server_name ;    # Match domain names (supports wildcards and regular expressions)    root /var/www/html;         # Website root directory    index ;           # Default homepage file    # SSL configuration (HTTPS)    listen 443 ssl;
    ssl_certificate /etc/ssl/certs/;
    ssl_certificate_key /etc/ssl/private/;
    # Access control    deny 192.168.1.100;         # Disable access to specific IPs    allow all;
    # Error page redirection    error_page 404 /;
    error_page 500 502 503 504 /;
}

upstream backend {
    # Load balancing policy (default polling)    least_conn;                # Minimum number of connections policy    # ip_hash; # Assign by client IP hash (session keeping)    # Backend server list    server 10.0.0.1:8080 weight=3;  # The higher the weight, the more allocation requests    server 10.0.0.2:8080;
    server 10.0.0.3:8080 backup;    # Backup server (enabled when the primary server is down)}
server {
    location / {
        proxy_pass http://backend;  # Clusters configured using upstream    }
}

stream {
    upstream backend_mysql {
        server 10.0.0.1:3306;
        server 10.0.0.2:3306;
    }
    server {
        listen 3306;          # Listen to TCP ports        proxy_pass backend_mysql;
        proxy_connect_timeout 5s;
    }
}

# Global Blockuser www-data;
worker_processes auto;
error_log /var/log/nginx/ warn;
# events blockevents {
    worker_connections 2048;
    use epoll;
}
# http blockhttp {
    include ;
    default_type application/octet-stream;
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" "$http_user_agent"';
    access_log /var/log/nginx/ main;
    sendfile on;
    keepalive_timeout 65;
    # Virtual Host 1: Static Resource Service    server {
        listen 80;
        server_name ;
        root /var/www/static;
        location / {
            expires 7d;
            add_header Cache-Control "public";
        }
    }
    # Virtual Host 2: Reverse Proxy Dynamic Application    server {
        listen 80;
        server_name ;
        location / {
            proxy_pass http://backend;
            proxy_set_header Host $host;
        }
    }
    # Load balancing configuration    upstream backend {
        server 10.0.0.1:8080;
        server 10.0.0.2:8080;
    }
}
# stream block (MySQL load balancing)stream {
    upstream mysql_cluster {
        server 10.0.0.1:3306;
        server 10.0.0.2:3306;
    }
    server {
        listen 3306;
        proxy_pass mysql_cluster;
    }
}