为高流量负载配置 Nginx + PHP-FPM

我的 nginx 不断崩溃并在浏览器中报告“错误网关”错误。Nginx 和 PHP-FPM 没有预先配置来处理大流量负载。我必须systemctl restart php7.0-fpm每小时安排一个 cron 工作，以确保我的网站在它们离开时不会停留太久。让我们开始吧。

我从中得到的一些错误/var/log/php7.0-fpm.log：

[20-Sep-2017 12:08:21] NOTICE: [pool web3] child 3495 started
[20-Sep-2017 12:08:21] NOTICE: [pool web3] child 2642 exited with code 0 after 499.814492 seconds from start

[20-Sep-2017 12:32:28] WARNING: [pool web3] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 7 idle, and 57 total children

nginx 日志中没有任何内容对我产生影响。如果我让它运行太久而不重新启动它（PHP-FPM），我会收到网关错误。我已经尝试按照教程 3 次调整设置，但仍然不行。现在，我可能已经完成了各种设置，但无论哪种方式，它都无法正常工作。

/etc/nginx/nginx.conf：

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

worker_rlimit_nofile 100000;

events {
        worker_connections 4096;
        use epoll;
        multi_accept on;
}


http {
        sendfile on;
        reset_timedout_connection on;
        client_body_timeout 10;
        send_timeout 2;
        keepalive_timeout 30;
        keepalive_requests 100000;
        tcp_nopush on;
        tcp_nodelay on;
        types_hash_max_size 2048;
        fastcgi_read_timeout 300000;
        client_max_body_size 9000m;
        include /etc/nginx/mime.types;
        default_type application/octet-stream;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
        ssl_prefer_server_ciphers on;
        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;
        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;

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
        open_file_cache max=200000 inactive=20s;
        open_file_cache_valid 30s;
        open_file_cache_min_uses 2;
        open_file_cache_errors on;

        access_log off;
}

/etc/php/7.0/fpm/php-fpm.conf：

    [www]

    pm = dynamic
    pm.max_spare_servers = 200
    pm.min_spare_servers = 100
    pm.start_servers = 100
    pm.max_children = 300

    [global]
    pid = /run/php/php7.0-fpm.pid
    error_log = /var/log/php7.0-fpm.log
    include=/etc/php/7.0/fpm/pool.d/*.conf

/etc/php/7.0/fpm/pool.d/www.conf：

[www]

user = www-data
group = www-data
listen = /run/php/php7.0-fpm.sock
listen.owner = www-data
listen.group = www-data
pm = dynamic
pm.max_children = 300
pm.start_servers = 100
pm.min_spare_servers = 100
pm.max_spare_servers = 200
pm.max_requests = 500

我的网站之一（/etc/php/7.0/fpm/pool.d/web3.conf）：

[web3]

listen = /var/lib/php7.0-fpm/web3.sock
listen.owner = web3
listen.group = www-data
listen.mode = 0660

user = web3
group = client1

pm = dynamic
pm.max_children = 141
pm.start_servers = 20
pm.min_spare_servers = 20
pm.max_spare_servers = 35
pm.max_requests = 500

chdir = /

env[HOSTNAME] = $HOSTNAME
env[TMP] = /var/www/clients/client1/web3/tmp
env[TMPDIR] = /var/www/clients/client1/web3/tmp
env[TEMP] = /var/www/clients/client1/web3/tmp
env[PATH] = /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

来自 htop 的资源/proc 使用情况：