我在平衡其他两台机器的负载的机器上的 default.vcl varnish 文件上激活了当前配置（其他两台机器也激活了 varnish）。
我的目的是让这台服务器只进行负载平衡，其他机器进行处理并进行自己的缓存。
我的问题是，即使进行了配置测试（甚至不是压力测试或任何东西，只是每分钟几个请求）我仍然会收到大师冥想错误并且必须重新启动清漆。
这是负载平衡服务器的 default.vcl：
backend vader {
.host = "app1.server.com";
.probe = {
.url = "/";
.interval = 10s;
.timeout = 4s;
.window = 5;
.threshold = 3;
}
}
backend malgus {
.host = "app2.server.com";
.probe = {
.url = "/";
.interval = 10s;
.timeout = 4s;
.window = 5;
.threshold = 3;
}
}
director dooku round-robin {
{
.backend = vader;
}
{
.backend = malgus;
}
}
sub vcl_recv {
if (req.http.host ~ "^balancer.server.com$") {
set req.backend = dooku;
}
}
我是否做错了什么或者遗漏了什么？
编辑：
这是 varnishlog 的输出：
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1345839995 1.0
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1345839998 1.0
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1345840001 1.0
0 Backend_health - malgus Still sick 4--X--- 0 3 5 0.000000 3.846876
0 Backend_health - vader Still sick 4--X--- 0 3 5 0.000000 3.839194
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1345840004 1.0
14 SessionOpen c 10.150.7.151 38272 :80
14 ReqStart c 10.150.7.151 38272 458200540
14 RxRequest c GET
14 RxURL c /
14 RxProtocol c HTTP/1.1
14 RxHeader c Host: dooku-dev.excelsior.com
14 RxHeader c Connection: keep-alive
14 RxHeader c User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11
14 RxHeader c Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
14 RxHeader c Accept-Encoding: gzip,deflate,sdch
14 RxHeader c Accept-Language: en-US,en;q=0.8,es-419;q=0.6,es;q=0.4
14 RxHeader c Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
14 RxHeader c Cookie: SESSa87d6c6da0c61037a9169122dc5e4a19=HR_0Srhgc-uDArT3aJFzOBy31FtzneTXg38byr1eGMU; __atuvc=4%7C33
14 VCL_call c recv pass
14 VCL_call c hash
14 Hash c /
14 Hash c dooku-dev.excelsior.com
14 VCL_return c hash
14 VCL_call c pass pass
14 FetchError c no backend connection
14 VCL_call c error deliver
14 VCL_call c deliver deliver
14 TxProtocol c HTTP/1.1
14 TxStatus c 503
14 TxResponse c Service Unavailable
14 TxHeader c Server: Varnish
14 TxHeader c Content-Type: text/html; charset=utf-8
14 TxHeader c Retry-After: 5
14 TxHeader c Content-Length: 418
14 TxHeader c Accept-Ranges: bytes
14 TxHeader c Date: Fri, 24 Aug 2012 20:26:44 GMT
14 TxHeader c X-Varnish: 458200540
14 TxHeader c Age: 0
14 TxHeader c Via: 1.1 varnish
14 TxHeader c Connection: close
14 Length c 418
14 ReqEnd c 458200540 1345840004.916415691 1345840004.965190172 0.020933390 0.048741817 0.000032663
14 SessionClose c error
14 StatSess c 10.150.7.151 38272 0 1 1 0 1 0 256 418
14 SessionOpen c 10.150.7.151 38273 :80
14 ReqStart c 10.150.7.151 38273 458200541
14 RxRequest c GET
14 RxURL c /favicon.ico
14 RxProtocol c HTTP/1.1
14 RxHeader c Host: dooku-dev.excelsior.com
14 RxHeader c Connection: keep-alive
14 RxHeader c Accept: */*
14 RxHeader c User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11
14 RxHeader c Accept-Encoding: gzip,deflate,sdch
14 RxHeader c Accept-Language: en-US,en;q=0.8,es-419;q=0.6,es;q=0.4
14 RxHeader c Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
14 RxHeader c Cookie: SESSa87d6c6da0c61037a9169122dc5e4a19=HR_0Srhgc-uDArT3aJFzOBy31FtzneTXg38byr1eGMU; __atuvc=4%7C33
14 VCL_call c recv pass
14 VCL_call c hash
14 Hash c /favicon.ico
14 Hash c dooku-dev.excelsior.com
14 VCL_return c hash
14 VCL_call c pass pass
14 FetchError c no backend connection
14 VCL_call c error deliver
14 VCL_call c deliver deliver
14 TxProtocol c HTTP/1.1
14 TxStatus c 503
14 TxResponse c Service Unavailable
14 TxHeader c Server: Varnish
14 TxHeader c Content-Type: text/html; charset=utf-8
14 TxHeader c Retry-After: 5
14 TxHeader c Content-Length: 418
14 TxHeader c Accept-Ranges: bytes
14 TxHeader c Date: Fri, 24 Aug 2012 20:26:45 GMT
14 TxHeader c X-Varnish: 458200541
14 TxHeader c Age: 0
14 TxHeader c Via: 1.1 varnish
14 TxHeader c Connection: close
14 Length c 418
14 ReqEnd c 458200541 1345840005.226389885 1345840005.226457834 0.000026941 0.000043154 0.000024796
14 SessionClose c error
14 StatSess c 10.150.7.151 38273 0 1 1 0 1 0 256 418
答案1
您的服务器存在连接问题。我发现您在后端使用了 DNS 地址。Varnish 在启动时解析 DNS，运行时不会注意到任何变化。
自从 Varnish 启动以来，您是否更改过 FQDN 目标？
您的 DNS 是否针对动态地址？
您应该尝试使用静态 IP 而不是 DNS 名称。
答案2
事实证明，后端服务器处理请求需要花费大量时间。我将架构从 un varnish 负载均衡器更改为每台服务器各一个负载均衡器。