yii2_nginx.conf

server {
    listen 80;

    error_log    /var/log/nginx/yiisite.log;

    server_name yiisite.loc;
    charset utf-8;

    root /var/www/yiisite/web;

    location / {
        index index.php;
        try_files $uri $uri/ /index.php?$args;
    }

    location = /robots.txt {
         allow all;
         log_not_found off;
         access_log off;
    }

    location = /sitemap.xml {
         allow all;
         log_not_found off;
         access_log off;
    }

    location ~ \.php$ {
        include        fastcgi_params;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        fastcgi_intercept_errors on;
        fastcgi_pass unix:/var/run/php5-fpm.sock;
    }

    location ~ /\. {
        deny all;
    }

    location ~*  \.(jp?g|png|gif|ico|css|js)$ {
        expires max;
    }
}