负载均衡策略

1. 轮询(默认)

upstream pool {
  server 192.168.2.130:8000;
  server 192.168.2.131:8000;
}

2. 权重

upstream pool {
  server 192.168.2.130:8000 weight=2;
  server 192.168.2.131:8000;
}

3. IP绑定

upstream pool {
  ip_hash;
  server 192.168.2.130:8000;
  server 192.168.2.131:8000;
}

4. 最少连接优先

upstream pool {
  least_conn;
  server 192.168.2.130:8000;
  server 192.168.2.131:8000;
}

5. 响应最快优先（第三方）

upstream pool {
  fair;
  server 192.168.2.130:8000;
  server 192.168.2.131:8000;
}

6. url绑定（第三方）

upstream pool {
  hash $request_uri;
  server 192.168.2.130:8000;
  server 192.168.2.131:8000;
}