nginx请求进入同一服务器

Question

我正在使用nginx进行负载平衡。我尝试过round_robin和least_conn.我有三台服务器在端口3001、3002和3003上本地运行。但是所有请求始终只发送到3001服务器。这是我的配置：

worker_processes 1;
events {
worker_connections  1024;
}

http {
include       mime.types;
default_type  application/octet-stream;
sendfile        on;
keepalive_timeout  65;
upstream my_http_servers {
least_conn;
server 127.0.0.1:3001;
server 127.0.0.1:3002;
server 127.0.0.1:3003;
}
server {
listen       3000;
server_name  localhost;
location / {
proxy_pass         http://my_http_servers;
}
error_page   500 502 503 504  /50x.html;
location = /50x.html {
root   html;
}
}
}

我不确定为什么连接总是只连接到一台服务器。

Answer 1

当将其添加到/etc/hosts时：

127.0.0.1       localhost
127.0.0.2       localhost1
127.0.0.3       localhost2
127.0.0.4       localhost3

此配置适用于：

worker_processes 1;
events {
worker_connections  1024;
}

http {
include       mime.types;
default_type  application/octet-stream;
sendfile        on;
keepalive_timeout  65;
upstream my_http_servers {
least_conn;
server localhost1:3001;
server localhost2:3002;
server localhost3:3003;
}
server {
listen       3000;
server_name  localhost;
location / {
proxy_pass         http://my_http_servers;
}
error_page   500 502 503 504  /50x.html;
location = /50x.html {
root   html;
}
}
server {
listen       3001;
server_name  localhost1;
root html/3001;
location / {
}
error_page   500 502 503 504  /50x.html;
location = /50x.html {
root   html;
}
}
server {
listen       3002;
server_name  localhost2;
root html/3002;
location / {
}
error_page   500 502 503 504  /50x.html;
location = /50x.html {
root   html;
}
}
server {
listen       3003;
server_name  localhost3;
root html/3003;
location / {
}
error_page   500 502 503 504  /50x.html;
location = /50x.html {
root   html;
}
}
}

我添加了 3 个不同root的服务器名称，只是为了能够看到哪个服务器确实进行了回复。

opensuse1:/var/log/nginx # curl -s -q  "http://localhost:3000/"  |grep 300
192.168.168.251 3003
opensuse1:/var/log/nginx # curl -s -q  "http://localhost:3000/"  |grep 300
192.168.168.251 3001
opensuse1:/var/log/nginx # curl -s -q  "http://localhost:3000/"  |grep 300
192.168.168.251 3002
opensuse1:/var/log/nginx # curl -s -q  "http://localhost:3000/"  |grep 300
192.168.168.251 3003
opensuse1:/var/log/nginx # curl -s -q  "http://localhost:3000/"  |grep 300
192.168.168.251 3001
opensuse1:/var/log/nginx # curl -s -q  "http://localhost:3000/"  |grep 300
192.168.168.251 3002
opensuse1:/var/log/nginx # curl -s -q  "http://localhost:3000/"  |grep 300
192.168.168.251 3003
opensuse1:/var/log/nginx # curl -s -q  "http://localhost:3000/"  |grep 300
192.168.168.251 3001
opensuse1:/var/log/nginx #