Nginx Config for A/B testing (50%/50%)

nginx_config_for_AB_testing.conf

##
##  Nginx Config for A/B testing (50%/50%)
##

split_clients "abtest${remote_addr}${http_user_agent}${date_gmt}" $variant {
    50%                 "abtest.your_domain.com/a_test.html";
      *                 "abtest.your_domain.com/b_test.html";
}

server {
    listen              80;
    server_name         abtest.your_domain.com;
    root                /var/www/your_abtests_folder;

    location / {
        rewrite ^\/$ "${scheme}://${variant}" redirect;
    }

    # access_log          off;
}