使用NodeJS在NGINX 502高负载下

Question

这是我的站点的nginx conf文件：

server {
    listen 80;
    listen [::]:80;

    server_name domain.com;

    proxy_http_version 1.1;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
    proxy_intercept_errors on;

    location / {
        proxy_pass http://127.0.0.1:10000;
    }
}

在高负载性能测试（1200 RPS）下使用nginx时，我得到了50％的错误率，并且以502返回。我在nodejs中的应用程序中没有错误日志，因为它直接被nginx拒绝了。

如果修改iptables以将端口80重定向到10000（应用程序端口），则会得到零错误； 和更好的性能

我想避免这种情况，因为将来我会使用let加密和nginx来提供https； 但是我需要保持原始性能。

我试着寻找答案，看到一些PHP的东西，但没有关于节点的东西。

有没有人遇到过这个问题，或者有一个想法如何微调nginx？ 现在已将nginx.conf设置为其默认安装。

nginx.conf

user www-data;
worker_processes auto;
pid /run/nginx.pid;

events {
    worker_connections 768;
    # multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    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; # 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_disable "msie6";

    # 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/*;
}


#mail {
#   # See sample authentication script at:
#   # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
# 
#   # auth_http localhost/auth.php;
#   # pop3_capabilities "TOP" "USER";
#   # imap_capabilities "IMAP4rev1" "UIDPLUS";
# 
#   server {
#       listen     localhost:110;
#       protocol   pop3;
#       proxy      on;
#   }
# 
#   server {
#       listen     localhost:143;
#       protocol   imap;
#       proxy      on;
#   }
#}

更新 ：

除了遵循本指南（ https://www.linode.com/docs/websites/nginx/configure-nginx-for-optimized-performance ）之外，我还必须：

编辑sysctl.conf并添加以下内容：

sysctl net.core.somaxconn=65536
sysctl net.ipv4.tcp_max_tw_buckets=1440000
sysctl net.ipv4.ip_local_port_range=1024 65000
sysctl net.ipv4.tcp_fin_timeout=15
sysctl net.ipv4.tcp_window_scaling=1    
sysctl net.ipv4.tcp_max_syn_backlog=3240000

编辑/etc/security/limits.conf并添加：

www-data    hard    nofile    65536
www-data    soft    nofile    65536

编辑lib / systemd / system / nginx.service配置并在KillMode下添加以下内容

LimitNOFILE=65536

为了提高性能，我将/ etc / nginx / proxy_params替换为：

proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_cache_bypass $http_upgrade;
proxy_intercept_errors on;

proxy_redirect off;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
proxy_temp_path /etc/nginx/proxy_temp;

Answer 1

供将来参考。 通过access_log off关闭访问日志以进行生产。

这几乎不会提高性能。