nginx最小配置解析，以及与业务场景对应关系。
Nginx多进程模型
Nginx最小配置解析
/etc/nginx/nginx.conf
worker_processes
nginx可以使用多个worker进程，原因如下：
to use SMP
to decrease latency when workers blockend on disk I/O
to limit number of connections per process when select()/poll() is used
一个CPU内核对应一个worker_process
http=>mime.types
浏览器是如何知道一个文件是要被下载还是要被展示？
通过加载另一个配置文件实现
sendfile on
数据零拷贝，既减少了中间调度，又减少了复制的过程
nginx应用程序内存不去加载磁盘上的文件，直接让数据发送给网络接口缓存
keepalive_timeout
保持连接超时的时间
虚拟主机(vhost)
server{
listen
server_name localhost;
location / {
# 域名后边跟的子目录/路径 URI
}
error_page 500 502 503 504 ……
# 访问出错时重定向到对应页面
location = /50x.html{
root html;
}
}
域名解析与泛域名解析
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user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;
events {
worker_connections 768;
# multi_accept on;
}
http {
##
# Basic Settings
##
sendfile on;
tcp_nopush on;
types_hash_max_size 2048;
# server_tokens off;
# server_names_hash_bucket_size 64;
# server_name_in_redirect off;
include /etc/nginx/mime.types;
default_type application/octet-stream;
##
# SSL Settings
##
ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
ssl_prefer_server_ciphers on;
##
# Logging Settings
##
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
##
# Gzip Settings
##
gzip on;
# gzip_vary on;
# gzip_proxied any;
# gzip_comp_level 6;
# gzip_buffers 16 8k;
# gzip_http_version 1.1;
# gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
##
# Virtual Host Configs
##
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
}
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