nginx_conf/conf.d/fdfs_tracker.conf

upstream fdfs_group1
{ 
server 127.0.0.1:9999; 
}
server{
location /group1/M00
{ 
proxy_pass http://fdfs_group1; 
}
location /group1/M01
{
proxy_pass http://fdfs_group1;
}
location /group1/M02
{
proxy_pass http://fdfs_group1;
}

}