能帮忙看一下这段 upstream 代码哪边有问题吗？

做了几个 ddns 服务准备放一起使用，我记得上次使用的时候还没有问题啊~~这次就不行了,感谢

upstream test { ip_hash; server 127.0.0.1:8001; server 127.0.0.1:8002; server 127.0.0.1:8003; } server { listen 80; server_name xxxxxxx.320.io index index.html; location /{ proxy_pass http://test; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_cache_bypass $http_upgrade; } } server { listen 8001; index index.html; location /{ proxy_pass http://jsjcjsjc.xxxxx.io/; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_cache_bypass $http_upgrade; } } server { listen 8002; index index.html; location /{ proxy_pass http://jsjcjsjc.xxxxxx.cn/; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_cache_bypass $http_upgrade; } } server { listen 8003; index index.html; location /{ proxy_pass http://nas.xxxxxx.net/; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_cache_bypass $http_upgrade; } }