配置nginx通过不同path反代至不同后端tomcat（即访问www.a.com/a/反代至tomcat1，访问www.a.com/b/反代至tomcat2）

tomcat1 http://10.0.0.152
tomcat2 http://10.0.0.162

修改nginx.conf
server {
listen 80;
server_name www.tan.com;

location ~/a/ {
proxy_pass http://10.0.0.152:8080;
}
location ~/b/{
proxy_pass http://10.0.0.162:8080;
}
}