清漆503服务不可用

Question

我的清漆版本是3.0.

当我卷曲URL时,我的服务器运行良好,但是当使用varnish cache时,它503 service unavailable会偶尔返回.

日志信息喜欢的是:

0 Debug        - "VCL_error(200, OK)"
24 VCL_call     c recv error
24 VCL_call     c error deliver
24 SessionClose c error
0 Debug        - "VCL_error(200, OK)"
27 VCL_call     c recv error
27 VCL_call     c error deliver
27 SessionClose c error
0 Debug        - "VCL_error(200, OK)"
16 VCL_call     c recv error
16 VCL_call     c error deliver
16 SessionClose c error
14 Debug        - "Write error, retval = 2998272, len = 8465870, errno = Success"
0 Debug        - "VCL_error(200, OK)"
14 VCL_call     c recv error
14 VCL_call     c error deliver
14 SessionClose c error
0 Debug        - "VCL_error(200, OK)"
21 VCL_call     c recv error
21 VCL_call     c error deliver
21 SessionClose c error

PS:我在浏览器上卷曲或输入网址时的服务器响应200.

Answer 1

清漆503可通过以下步骤修复:

1. 增加connect_timeout,.first_byte_timeout并.between_bytes_timeout在你的后端设置:

   backend default {
     .host = "www.example.com";
     .connect_timeout = 5s;
     .first_byte_timeout = 10s;
     .between_bytes_timeout = 10s;
   }
   

2. 启动清漆时将参数增加到8192.

   varnishd [options] http_resp_hdr_len=8192
   

3. 结帐你network或backend server.

   如果步骤1和步骤2无法帮助您,请检查您network connection和banckend server's availability.