How to configure VPS with Nginx?

Hello, and congratulations to Drupal 8 !

I use nginx + php5-fpm. My sites work on Drupal 7.

There are some errors that did not appear in usual shared hostingm but appear in my VPS, that I configure first time.

Drupal says: "HTTP request status Fails"

This is why I catch an error is with module Boost: all cache files recreates every time I visit page like anonymous. I look `ls -l` and files renew and renew when I refresh page by anonym.

Do not know what to do and what to show. Just my few configs.

# cat /etc/nginx/nginx.conf

user  www-data www-data;
worker_processes  1;
worker_priority	-20;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/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"';

    client_max_body_size 12m;
    access_log  off; #/var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    server_names_hash_max_size	1024;
    server_names_hash_bucket_size	128;

    #gzip  on;

    fastcgi_temp_path	/var/cache/nginx/temp/fastcgi;
    proxy_temp_path	/var/cache/nginx/temp/proxy;

    charset	utf-8;
    index	index.php index.html index.htm;

    #include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

    # cat /etc/nginx/sites-available/xn--d1aejaxb1a.xn--p1ai
    
    server {
    
        listen                  80;
    
        server_name             www.xn--d1aejaxb1a.xn--p1ai xn--d1aejaxb1a.xn--p1ai;
    
     
    
        set 	            $main_host		'xn--d1aejaxb1a.xn--p1ai';
    
     
    if ($host != $main_host) {
    
            rewrite             ^(.*)$              http://$main_host$1     permanent;
    break;
    }
    
     
    
        access_log              /var/log/nginx/xn--d1aejaxb1a.xn--p1ai.access.log;
    error_log       	    /var/log/nginx/xn--d1aejaxb1a.xn--p1ai.error.log;
    
     
    
        root                    /var/www/$main_host/www;
    
        index                   index.php index.html index.htm;
    
     
    
        location / {
    
            try_files           $uri    $uri/    /index.php?$args;
    }	
    
     
    
        location ~ \.php$ {
    include             /etc/nginx/conf.d/fastcgi_params.conf;
    
     
    
            fastcgi_param       SCRIPT_FILENAME  	/var/www/$main_host/www$fastcgi_script_name;
    
            fastcgi_param       DOCUMENT_ROOT       /var/www/$main_host/www;
    
     
    
            fastcgi_param       PHP_ADMIN_VALUE     upload_tmp_dir=/var/www/$main_host/tmp/upload;
    
            fastcgi_param       PHP_ADMIN_VALUE     session.save_path=/var/www/$main_host/tmp/sessions;
    }
    
     
    
        location ~ /\. {
    
    	deny                all;
    
    	access_log          off;
    
    	log_not_found       off;
    }
    }