#http://alice.testpm.com ==> http://www.testpm.com/alice
#http://jack.testpm.com ==> http://www.testpm.com/jack

location / {
	if ( $host ~ www.testpm.com ){
		break;
	}
	if ( $host ~ ^(.*)\.testpm.com$){
		set $user $1;
		rewrite .* http://www.testpm.com/$user permanent;
	}
}

location /alice {
	root /usr/share/nginx/html;
	index a.html;
}