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Nginx学习日志 2

Nginx 配置语法

  • 配置文件由指令与指令块组成
  • 每条指令以 ; 结尾,指令与参数以空格符号分隔
  • 指令块以{} 大括号将多条指令组合在一起
  • include 语句允许组合多个配置文件以提升可维护性
  • 使用#符号添加注释,提高可读性
  • 使用$符变量
  • 部分指令的参数支持正则表达式
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# nginx.conf
#user nobody;
worker_processes 1;

#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;

#pid logs/nginx.pid;


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"';

#access_log logs/access.log main;

sendfile on;
#tcp_nopush on;

#keepalive_timeout 0;
keepalive_timeout 65;

#gzip on;

server {
listen 80;
server_name localhost;

#charset koi8-r;

#access_log logs/host.access.log main;

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

#error_page 404 /404.html;

# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}

# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}

# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}

# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}

# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;

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


# HTTPS server
#
#server {
# listen 443 ssl;
# server_name localhost;

# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;

# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m;

# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;

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

http配置指令块主要包含下面4个部分

  • http
  • server
  • location
  • upstream

Nginx命令行

  • 格式 nginx -s reload
  • 帮助 -? -h
  • 使用指定的配置文件 -c
  • 指定配置文件指定 -g
  • 指定运行目录 -p
  • 发送信号 -s(立刻停止 stop 优雅退出 quit 重载配置文件 reload 重新开始记录日志文件reopen)
  • 测试配置文件是否有语法错误 -t -T
  • 打印Nginx的版本信息、编译信息等 -v -V

Nginx 热部署

备份

cp nginx nginx.old
用新编译好的nginx 替换

部署切换

-ef | grep nginx
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#进程会平滑切换
kill -USR2 pid

#优雅退出
kill -WNCH pid

日志切割

移动日志 mv xxx.log xxx.bak 重新开始记录日志文件,更好的方式是通过脚本进行
./nginx -s reopen

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