503后端获取失败，varnish 4.1和WordPress 4.4

我在

varnish 4

和

WordPress 4.4

中有一个503多主机错误

虚拟服务器，到服务器1和服务器2。（我只复制一个，因为两者的VS相同，x等于服务器号）

default.vcl

vcl 4.0;

backend server_1{
  .host = "127.0.0.1";
  .port = "81";
  .probe = {
    .url = "/";
    .interval = 5s;
    .timeout = 2s;
    .window = 5;
    .threshold = 3;
  }
}

backend server_2{
  .host = "127.0.0.1";
  .port = "81";
  .probe = {
  # the same of server_1
  }
}

acl purge {
  "localhost";
  "127.0.0.1";
}

sub vcl_recv {
  if (req.http.host ~ "server_1.localhost") {
    set req.backend_hint = server_1;
  }
  elseif (req.http.host ~ "server_2.localhost") {
    set req.backend_hint = server_2;
  }

  if (req.method == "PURGE") {
    if (!client.ip ~ purge) {
      return(synth(405,"Not allowed."));
    }
      return (purge);
  }

  if (req.url ~ "\.(gif|jpg|jpeg|swf|ttf|css|js|flv|mp3|mp4|pdf|ico|png)(\?.*|)$") {
    unset req.http.cookie;
    set req.url = regsub(req.url, "\?.*$", "");
  }

  if (req.url ~ "\?(utm_(campaign|medium|source|term)|adParams|client|cx|eid|fbid|feed|ref(id|src)?|v(er|iew))=") {
    set req.url = regsub(req.url, "\?.*$", "");
  }

  if (req.url ~ "wp-(login|admin)" || req.url ~ "preview=true" || req.url ~ "xmlrpc.php") {
    return (pass);
  }

  if (req.http.cookie) {
    if (req.http.cookie ~ "(wordpress_|wp-settings-)") {
      return(pass);
     } else {
     unset req.http.cookie;
     }
  }
return(hash);
}

sub vcl_backend_response {
  if ( (!(bereq.url ~ "(wp-(login|admin)|login)")) || (bereq.method == "GET") ) {
    unset beresp.http.set-cookie;
    set beresp.ttl = 1h;
  }
  if (bereq.url ~ "\.(gif|jpg|jpeg|swf|ttf|css|js|flv|mp3|mp4|pdf|ico|png)(\?.*|)$") {
    set beresp.ttl = 365d;
  }
} 

sub vcl_deliver {
   if (obj.hits > 0) {
     set resp.http.X-Cache = "HIT";
   } else {
     set resp.http.X-Cache = "MISS";
   }
   set resp.http.X-Hits = obj.hits;
}

---

当我尝试输入任何服务器时，我得到的503后端获取失败，但当我通过单独的服务器输入时（

http://server_1.localhost

和

http://server_2.localhost

）返回

200

code.

通过GET/检查后端是否健康。后端的IP是127.0.0.1 尝试登录您的服务器并通过控制台web浏览器执行“get/”，如eLink（如果您没有，请使用apt get install eLink或yum install eLink）： 埃林克斯 当我在我的服务器上完成这项工作时，我发现127.0.0.1没有默认的web页面，Varnish出现错误404并将后端标记为坏。 希望这能有所帮助

vcl 4.0;

backend server_1{
  .host = "127.0.0.1";
  .port = "81";
  .probe = {
    .url = "/";
    .interval = 5s;
    .timeout = 2s;
    .window = 5;
    .threshold = 3;
  }
}

backend server_2{
  .host = "127.0.0.1";
  .port = "81";
  .probe = {
  # the same of server_1
  }
}

acl purge {
  "localhost";
  "127.0.0.1";
}

sub vcl_recv {
  if (req.http.host ~ "server_1.localhost") {
    set req.backend_hint = server_1;
  }
  elseif (req.http.host ~ "server_2.localhost") {
    set req.backend_hint = server_2;
  }

  if (req.method == "PURGE") {
    if (!client.ip ~ purge) {
      return(synth(405,"Not allowed."));
    }
      return (purge);
  }

  if (req.url ~ "\.(gif|jpg|jpeg|swf|ttf|css|js|flv|mp3|mp4|pdf|ico|png)(\?.*|)$") {
    unset req.http.cookie;
    set req.url = regsub(req.url, "\?.*$", "");
  }

  if (req.url ~ "\?(utm_(campaign|medium|source|term)|adParams|client|cx|eid|fbid|feed|ref(id|src)?|v(er|iew))=") {
    set req.url = regsub(req.url, "\?.*$", "");
  }

  if (req.url ~ "wp-(login|admin)" || req.url ~ "preview=true" || req.url ~ "xmlrpc.php") {
    return (pass);
  }

  if (req.http.cookie) {
    if (req.http.cookie ~ "(wordpress_|wp-settings-)") {
      return(pass);
     } else {
     unset req.http.cookie;
     }
  }
return(hash);
}

sub vcl_backend_response {
  if ( (!(bereq.url ~ "(wp-(login|admin)|login)")) || (bereq.method == "GET") ) {
    unset beresp.http.set-cookie;
    set beresp.ttl = 1h;
  }
  if (bereq.url ~ "\.(gif|jpg|jpeg|swf|ttf|css|js|flv|mp3|mp4|pdf|ico|png)(\?.*|)$") {
    set beresp.ttl = 365d;
  }
} 

sub vcl_deliver {
   if (obj.hits > 0) {
     set resp.http.X-Cache = "HIT";
   } else {
     set resp.http.X-Cache = "MISS";
   }
   set resp.http.X-Hits = obj.hits;
}