{"id":332,"date":"2013-01-10T03:33:49","date_gmt":"2013-01-10T03:33:49","guid":{"rendered":"c042f4db68f23406c6cecf84a7ebb0fe"},"modified":"2013-01-10T03:33:49","modified_gmt":"2013-01-10T03:33:49","slug":"","status":"publish","type":"post","link":"https:\/\/www.xiaobo.li\/notes\/archives\/332","title":{"rendered":"varnish \u53c2\u6570\u8bf4\u660e"},"content":{"rendered":"

vcl_init<\/span><\/strong><\/span> <\/p>\n

Called when VCL is loaded, before any requests pass through it. Typically used to initialize VMODs.<\/p>\n

\u5f53VCL\u52a0\u8f7d\u65f6\u8c03\u7528\uff0c\u4e4b\u540e\u52a0\u8f7d\u5ba2\u6237\u8bf7\u6c42\u3002\u4e00\u822c\u7528\u4e8e\u521d\u59cb\u5316VMOD\u6a21\u5757\u3002<\/p>\n

return() values:<\/p>\n

\u8fd4\u56de\u503c\u6709\uff1a<\/p>\n

ok <\/strong>Normal return, VCL continues loading.<\/p>\n

OK \u6b63\u5e38\u8fd4\u56de\u503c\uff0c\u8fd4\u56deOK\u540eVCL\u52a0\u8f7d\u3002<\/p>\n

vcl_recv<\/span><\/strong><\/p>\n

Called at the beginning of a request, after the complete request has been received and parsed. <\/p>\n

Its purpose is to decide whether or not to serve the request, how to do it, and, if applicable, <\/p>\n

which backend to use.<\/p>\n

\u5728\u8bf7\u6c42\u5b8c\u5168\u63a5\u6536\u5e76\u89e3\u6790\u5b8c\u4e4b\u540e\uff0c\u4ece\u8bf7\u6c42\u7684\u5f00\u59cb\u5904\u8c03\u7528\uff0c\u4ed6\u7684\u76ee\u7684\u662f\u51b3\u5b9a\u662f\u5426\u5904\u7406\u8bf7\u6c42\uff0c\u600e\u4e48\u5904\u7406\u8bf7\u6c42\uff0c\u6216\u8005\u5982\u679c\u540e\u7aef\u6709\u591a\u4e2a\u670d\u52a1\u5668\u7684\u8bdd\uff0c\u51b3\u5b9a\u53bb\u8c03\u7528\u54ea\u4e2a\u3002<\/p>\n

The vcl_recv subroutine may terminate with calling return() on one of the following keywords:<\/p>\n

vcl_recv\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/p>\n

error code [reason]<\/strong>Return the specified error code to the client and abandon the request.<\/p>\n

error code [reason]  \u7ed9\u5ba2\u6237\u7aef\u8fd4\u56de\u6307\u5b9a\u7684\u9519\u8bef\u4ee3\u7801\u5e76\u4e22\u5f03\u8bf7\u6c42\u3002<\/p>\n

pass<\/strong>  Switch to pass mode. Control will eventually pass to vcl_pass.<\/p>\n

pass  \u4f20\u9001\u5230pass\u6a21\u5f0f\uff0c\u63a7\u5236\u6743\u5c06\u6700\u7ec8\u4ea4\u7ed9vcl_pass.<\/p>\n

pipe <\/strong>  Switch to pipe mode. Control will eventually pass to vcl_pipe.<\/p>\n

pipe  \u4f20\u9001\u5230pipe\u6a21\u5f0f\uff0c\u63a7\u5236\u6743\u5c06\u6700\u7ec8\u4ea4\u7ed9vcl_pipe.<\/span>\n<\/p>\n

lookup <\/strong>  Look up the requested object in the cache. Control will eventually pass to vcl_hit or vcl_miss, <\/p>\n

depending on whether the object is in the cache.<\/p>\n

lookup  \u4ece\u7f13\u5b58\u4e2d\u67e5\u627e\u5bf9\u8c61\uff0c\u63a7\u5236\u6743\u5c06\u6700\u7ec8\u4ea4\u7ed9vcl_hit\u6216\u8005vcl_miss\uff0c\u8fd9\u53d6\u51b3\u4e8e\u662f\u5426\u4ece\u7f13\u5b58\u4e2d\u547d\u4e2d\u5bf9\u8c61\u3002<\/p>\n

vcl_pipe<\/span><\/strong><\/p>\n

Called upon entering pipe mode. In this mode, the request is passed on to the backend, and any further <\/p>\n

data from either client or backend is passed on unaltered until either end closes the connection.<\/p>\n

\u5f53\u8fdb\u5165pipe\u6a21\u5f0f\u65f6\u8c03\u7528\uff0c\u5728\u8fd9\u4e2a\u6a21\u5f0f\u4e0b\uff0c\u8bf7\u6c42\u88ab\u9001\u5230\u540e\u7aef\u670d\u52a1\u5668\uff0c\u4e4b\u540e\u7684\u7684\u6240\u6709\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u7aef\u7684\u8bf7\u6c42\u5c06\u4e00\u76f4\u4ee5\u540c\u6837\u7684\u65b9\u5f0f\u4f20\u8f93\uff0c\u76f4\u5230\u8fde\u63a5\u5173\u95ed\u3002<\/p>\n

The vcl_pipe subroutine may terminate with calling return() with one of the following keywords:<\/p>\n

vcl_pipe\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7<\/span>return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/span>\n<\/p>\n

error code [reason] <\/strong> Return the specified error code to the client and abandon the request.<\/p>\n

pipe<\/strong> Proceed with pipe mode.<\/p>\n

vcl_pass<\/span><\/strong><\/p>\n

Called upon entering pass mode. In this mode, the request is passed on to the backend, and the<\/p>\n

 backend's response is passed on to the client, but is not entered into the cache. Subsequent requests sub\u2010 mitted over the same client connection are handled normally.<\/p>\n

\u8fdb\u5165pass\u6a21\u5f0f\u65f6\u8c03\u7528\uff0c\u5728\u8fd9\u4e2a\u6a21\u5f0f\u4e0b\uff0c\u8bf7\u6c42\u88ab\u76f4\u63a5\u9001\u5230\u540e\u7aef\uff0c\u540e\u7aef\u8fd4\u56de\u7684\u6570\u636e\u88ab\u76f4\u63a5\u8fd4\u56de\u5230\u5ba2\u6237\u7aef\uff0c\u5e76\u4e14\u4e0d\u52a0\u5165\u7f13\u5b58\u4e2d\uff0c\u4e4b\u540e\u7684\u8bf7\u6c42\u5c06\u4ee5\u540c\u6837\u7684\u65b9\u5f0f\u52a0\u4ee5\u5904\u7406\u3002<\/p>\n

The vcl_pass subroutine may terminate with calling return() with one of the following keywords:<\/p>\n

vcl_piass\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7<\/span>return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/span>\n<\/p>\n

error code [reason] <\/strong> Return the specified error code to the client and abandon the request.<\/p>\n

pass  <\/strong>Proceed with pass mode.<\/p>\n

restart<\/strong>Restart the transaction. Increases the restart counter. If the number of restarts is higher than <\/p>\n

max_restarts<\/em> varnish emits a guru meditation error.<\/p>\n

restart \u91cd\u65b0\u5f00\u59cb\u4e8b\u52a1\u3002\u589e\u52a0\u91cd\u542f\u8ba1\u6570\u5668\uff0c\u5982\u679c\u8ba1\u6570\u5668\u7684\u503c\u5927\u4e8emax_restarts\u6307\u5b9a\u7684\u503c\uff0cvarnish\u53d1\u51fa\u4e00\u4e2a\u4e25\u91cd\u9519\u8bef\u3002<\/p>\n

vcl_hash<\/span><\/strong><\/p>\n

You may call hash_data() on the data you would like to add to the hash.<\/p>\n

\u4f60\u53ef\u4ee5\u5728\u4f60\u60f3\u52a0\u5165hash\u7684\u6570\u636e\u4e2d\u53bb\u8c03\u7528hash_data().<\/p>\n

The vcl_hash subroutine may terminate with calling return() with one of the following keywords:<\/p>\n

vcl_hash\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7<\/span>return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/span>\n<\/p>\n

hash<\/strong> Proceed.<\/p>\n

hash \u5f00\u59cbhash\u6570\u636e\u3002<\/p>\n

vcl_hit<\/span><\/strong><\/p>\n

Called after a cache lookup if the requested document was found in the cache.<\/p>\n

\u5982\u679c\u6570\u636e\u4ece\u7f13\u5b58\u4e2d\u627e\u5230\u5219\u8c03\u7528vcl_hit.<\/p>\n

The vcl_hit subroutine may terminate with calling return() with one of the following keywords:<\/p>\n

vcl_hit\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7<\/span>return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/span>\n<\/p>\n

deliver  <\/strong>Deliver the cached object to the client. Control will eventually pass to vcl_deliver.<\/p>\n

deliver \u628a\u7f13\u5b58\u547d\u4e2d\u7684\u6570\u636e\u4f20\u9001\u7ed9\u5ba2\u6237\u7aef \uff0c\u63a7\u5236\u6743\u5c06\u6700\u7ec8\u4ea4\u7ed9vcl_deliver.<\/p>\n

error code [reason]   <\/strong>Return the specified error code to the client and abandon the request.<\/p>\n

pass   <\/strong>Switch to pass mode. Control will eventually pass to vcl_pass.<\/p>\n

restart<\/strong>  Restart the transaction. Increases the restart counter. If the number of restarts is higher than <\/p>\n

max_restarts<\/em> varnish emits a guru meditation error.<\/p>\n

vcl_miss<\/span><\/strong><\/p>\n

Called after a cache lookup if the requested document was not found in the cache. Its purpose is to <\/p>\n

decide whether or not to attempt to retrieve the document from the backend, and which backend to use.<\/p>\n

\u5982\u679c\u6570\u636e\u6ca1\u6709\u4ece\u7f13\u5b58\u4e2d\u627e\u5230\u5219\u8c03\u7528vcl_miss.\u5b83\u7684\u76ee\u7684\u662f\u51b3\u5b9a\u662f\u5426\u5c1d\u8bd5\u4ece\u540e\u7aef\u670d\u52a1\u5668\u68c0\u7d22\u6570\u636e\uff0c\u5982\u679c\u6709\u591a\u4e2a\u540e\u7aef\u670d\u52a1\u5668\u7684\u8bdd\uff0c\u51b3\u5b9a\u8c03\u7528\u54ea\u4e2a\u540e\u7aef\u670d\u52a1\u5668\u3002<\/p>\n

The vcl_miss subroutine may terminate with calling return() with one of the following keywords:<\/p>\n

vcl_miss\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7<\/span>return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/span>\n<\/p>\n

error code [reason]  <\/strong>Return the specified error code to the client and abandon the request.<\/p>\n

pass <\/strong>  Switch to pass mode. Control will eventually pass to vcl_pass.<\/p>\n

fetch<\/strong>  Retrieve the requested object from the backend. Control will eventually pass to vcl_fetch.<\/p>\n

fetch \u4ece\u540e\u7aef\u670d\u52a1\u5668\u68c0\u7d22\u6570\u636e\uff0c\u63a7\u5236\u6743\u5c06\u6700\u7ec8\u4ea4\u7ed9vcl_fetch.<\/p>\n

vcl_fetch<\/span><\/strong><\/p>\n

Called after a document has been successfully retrieved from the backend.<\/p>\n

\u5f53\u6570\u636e\u6210\u529f\u7684\u4ece\u540e\u7aef\u670d\u52a1\u5668\u68c0\u7d22\u5230\u4e4b\u540e\u8c03\u7528\u3002<\/p>\n

The vcl_fetch subroutine may terminate with calling return() with one of the following keywords:<\/p>\n

vcl_fetch\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7<\/span>return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/span>\n<\/p>\n

deliver<\/strong>  Possibly insert the object into the cache, then deliver it to the client. Control will eventually <\/p>\n

pass to vcl_deliver.<\/p>\n

deliver \u5c3d\u53ef\u80fd\u7684\u628a\u6570\u636e\u52a0\u5165\u7f13\u5b58\uff0c\u7136\u540e\u4f20\u8f93\u7ed9\u5ba2\u6237\u7aef \uff0c\u63a7\u5236\u6743\u5c06\u6700\u7ec8\u4ea4\u7ed9vcl_deliver.<\/p>\n

error code [reason]    <\/strong>Return the specified error code to the client and abandon the request.<\/p>\n

hit_for_pass <\/strong> Pass in fetch. This will create a hit_for_pass object. Note that the TTL for the hit_for_pass <\/p>\n

object will be set to what the current value of beresp.ttl. Control will be handled to vcl_deliver on the <\/p>\n

current request, but subsequent requests will go directly to vcl_pass based on the hit_for_pass object.<\/p>\n

hit_for_pass \u8fdb\u5165fetch.\u5b83\u5c06\u521b\u5efa\u4e00\u4e2ahit_for_pass\u5bf9\u8c61\uff0chit_for_pass\u5bf9\u8c61\u7684TTL\u503c\u5c06\u4f1a\u88ab\u8bbe\u7f6e\u6210beresp.ttl\u7684\u5f53\u524d\u503c\u3002\u8be5\u8bf7\u6c42\u7684\u63a7\u5236\u6743\u5c06\u4ea4\u7ed9vcl_deliver\u6765\u5904\u7406\uff0c\u4e4b\u540e\u8bf7\u6c42\u5c06\u76f4\u63a5\u4ea4\u7ed9vcl_pass\uff0c\u53d6\u51b3\u4e8ehit_for_pass\u5bf9\u8c61\u3002<\/p>\n

restart <\/strong> Restart the transaction. Increases the restart counter. If the number of restarts is higher <\/p>\n

than max_restarts<\/em> varnish emits a guru meditation error.<\/p>\n

vcl_deliver<\/span><\/strong><\/p>\n

Called before a cached object is delivered to the client.<\/p>\n

\u5728\u6570\u636e\u4f20\u8f93\u5230\u5ba2\u6237\u7aef\u4e4b\u524d\u88ab\u8c03\u7528\u3002<\/p>\n

The vcl_deliver subroutine may terminate with one of the following keywords:<\/p>\n

vcl_deliver\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7<\/span>return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/span>\n<\/p>\n

deliver <\/strong> Deliver the object to the client.<\/p>\n

deliver \u628a\u5bf9\u8c61\u4f20\u8f93\u5230\u5ba2\u6237\u7aef\u3002<\/p>\n

error code [reason]   <\/strong>Return the specified error code to the client and abandon the request.<\/p>\n

restart   <\/strong>Restart the transaction. Increases the restart counter. If the number of restarts is higher <\/p>\n

than max_restarts<\/em> varnish emits a guru meditation error.<\/p>\n

vcl_error<\/span><\/strong><\/p>\n

Called when we hit an error, either explicitly or implicitly due to backend or internal errors.<\/p>\n

The vcl_error subroutine may terminate by calling return with one of the following keywords:<\/p>\n

vcl_error\u5b50\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4ee5\u4e0b\u5173\u952e\u5b57\u901a\u8fc7<\/span>return()\u6765\u7ec8\u6b62\u5904\u7406\uff1a<\/span>\n<\/p>\n

deliver<\/strong>  Deliver the error object to the client.<\/p>\n

restart <\/strong>  Restart the transaction. Increases the restart counter. If the number of restarts is higher than <\/p>\n

max_restarts<\/em> varnish emits a guru meditation error.<\/p>\n

vcl_fini<\/span><\/strong><\/p>\n

Called when VCL is discarded only after all requests have exited the VCL. Typically used to clean up VMODs.<\/p>\n

return() values:<\/p>\n

ok<\/strong> Normal return, VCL will be discarded.<\/span><\/p>\n

------------------------------------------<\/span><\/p>\n

\u542f\u52a8\u811a\u672c
\n #!\/bin\/bash
\n### BEGIN INIT INFO
\n# Author: JeremyWei
\n# Date: 2011.8.27
\n# Description: Varnish management
\n### END INIT INFO<\/p>\n

prefix=\/usr\/local\/varnish
\nvarnish_bin=${prefix}\/sbin\/varnishd
\nstorage=2000M
\nvarnish_opts=\"-f ${prefix}\/etc\/varnish\/default.vcl -T 127.0.0.1:2000 -a 0.0.0.0:80 -s file,\/tmp,${storage}\"<\/p>\n

case \"$1\" in
\n    start)
\n        echo -n \"Starting varnish......\"<\/p>\n

        $varnish_bin $varnish_opts<\/p>\n

        if [ \"$?\" != 0 ] ; then
\n            echo \" failed\"
\n            exit 1
\n        else
\n            echo \" done\"
\n        fi
\n        ;;<\/p>\n

    stop)
\n        echo -n \"Shutting down Varnish......\"<\/p>\n

        pkill varnishd<\/p>\n

        if [ \"$?\" != 0 ] ; then
\n            echo \" failed\"
\n            exit 1
\n        else
\n            echo \" done\"
\n        fi
\n        ;;<\/p>\n

    restart)
\n        $0 stop
\n        $0 start
\n        ;;<\/p>\n

    *)
\n        echo \"Usage: $0 {start|stop|restart}\"
\n        exit 1
\n        ;;
\nesac<\/p>\n

Subroutine\u5217\u8868
\n \u2022vcl_recv
\n \u5728\u8bf7\u6c42\u5f00\u59cb\u65f6\u5019\u88ab\u8c03\u7528\uff0c\u5728\u8bf7\u6c42\u5df2\u7ecf\u88ab\u63a5\u6536\u5230\u5e76\u4e14\u89e3\u6790\u540e\u8c03\u7528\u3002\u76ee\u7684\u5c31\u662f\u51b3\u5b9a\u662f\u5426\u5904\u7406\u8fd9\u4e2a\u8bf7\u6c42\uff0c\u600e\u4e48\u5904\u7406\uff0c\u4f7f\u7528\u54ea\u4e2a\u540e\u7aef\u3002vcl_recv\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n error code [reason]\uff1a\u8fd4\u56de\u9519\u8bef\u7801\u7ed9\u5ba2\u6237\u7aef\uff0c\u4e22\u5f03\u8bf7\u6c42\u3002
\n pass\uff1a\u8f6c\u6362\u5230pass\u6a21\u5f0f\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_pass\u3002
\n pipe\uff1a\u8f6c\u6362\u5230pipe\u6a21\u5f0f\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_pipe\u3002
\n lookup\uff1a\u5728\u7f13\u5b58\u4e2d\u5bfb\u627e\u8bf7\u6c42\u5bf9\u8c61\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_hit\u6216\u8005vcl_miss\uff0c\u51b3\u5b9a\u4e8e\u5bf9\u8c61\u662f\u5426\u5728\u7f13\u5b58\u4e2d\u3002
\n \u2022vcl_pipe
\n \u5f53\u8fdb\u5165pipe\u6a21\u5f0f\u7684\u65f6\u5019\u88ab\u8c03\u7528\u3002\u5728\u8fd9\u4e2a\u6a21\u5f0f\u4e2d\uff0c\u8bf7\u6c42\u4f1a\u88ab\u8f6c\u79fb\u5230\u540e\u7aef\uff0c\u540e\u7eed\u7684\u6570\u636e\u4e0d\u7ba1\u662f\u4ece\u5ba2\u6237\u7aef\u8fd8\u662f\u540e\u7aef\u6765\u7684\u90fd\u4f1a\u4ee5\u4e0d\u53d8\u7684\u65b9\u5f0f\u4f20\u9001\uff0c\u76f4\u5230\u8fde\u63a5\u5173\u95ed\u4e3a\u6b62\u3002vcl_pipe\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n error code [reason]\uff1a\u8fd4\u56de\u9519\u8bef\u7801\u7ed9\u5ba2\u6237\u7aef\uff0c\u4e22\u5f03\u8bf7\u6c42\u3002
\n pipe\uff1a\u4ee5pipe\u6a21\u5f0f\u6267\u884c\u3002
\n \u2022vcl_pass
\n \u5f53\u8fdb\u5165pass\u6a21\u5f0f\u7684\u65f6\u5019\u4f1a\u88ab\u8c03\u7528\u3002\u5728\u8fd9\u4e2a\u6a21\u5f0f\u4e2d\uff0c\u8bf7\u6c42\u4f1a\u88ab\u4f20\u9001\u5230\u540e\u7aef\uff0c\u7136\u540e\u540e\u7aef\u7684\u54cd\u5e94\u4f1a\u88ab\u4f20\u9001\u56de\u5ba2\u6237\u7aef\uff0c\u4f46\u662f\u54cd\u5e94\u4e0d\u4f1a\u8fdb\u5165\u7f13\u5b58\u4e2d\u3002\u63a5\u4e0b\u6765\u901a\u8fc7\u76f8\u540c\u5ba2\u6237\u7aef\u8fde\u63a5\u53d1\u8d77\u7684\u8bf7\u6c42\u4f1a\u4ee5\u666e\u901a\u7684\u65b9\u5f0f\u6765\u5904\u7406\u3002vcl_pass\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n error code [reason]\uff1a\u8fd4\u56de\u9519\u8bef\u7801\u7ed9\u5ba2\u6237\u7aef\uff0c\u4e22\u5f03\u8bf7\u6c42\u3002
\n pass\uff1a\u4ee5pass\u6a21\u5f0f\u6267\u884c\u3002
\n restart\uff1a\u91cd\u65b0\u542f\u52a8\u8fd9\u4e2a\u4e8b\u52a1\u3002\u589e\u52a0\u4e86\u91cd\u542f\u8ba1\u6570\u3002\u5982\u679c\u91cd\u542f\u7684\u6b21\u6570\u9ad8\u4e8emax_restarts\uff0cvarnish\u4f1a\u5f15\u8d77\u4e00\u4e2a\u9519\u8bef\u3002
\n \u2022vcl_hash
\n \u4f60\u5982\u679c\u628a\u60f3\u628a\u6570\u636e\u52a0\u5165\u5230hash\u4e2d\uff0c\u90a3\u4e48\u8c03\u7528hash_data()\u3002vcl_hash\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n hash\uff1a\u6267\u884chash\u903b\u8f91\u3002
\n \u2022vcl_hit
\n \u5982\u679c\u8bf7\u6c42\u7684\u5bf9\u8c61\u5728\u7f13\u5b58\u4e2d\u88ab\u627e\u5230\u4e86\uff0c\u90a3\u4e48\u5728\u7f13\u5b58\u67e5\u627e\u7ed3\u675f\u540e\u88ab\u8c03\u7528\u3002vcl_hit\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n deliver\uff1adeliver\u7f13\u5b58\u5bf9\u8c61\u5230\u5ba2\u6237\u7aef\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_deliver\u3002
\n error code [reason]\uff1a\u8fd4\u56de\u9519\u8bef\u7801\u7ed9\u5ba2\u6237\u7aef\uff0c\u4e22\u5f03\u8bf7\u6c42\u3002
\n pass\uff1a\u5207\u6362\u5230pass\u6a21\u5f0f\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_pass\u3002
\n restart\uff1a\u91cd\u65b0\u542f\u52a8\u8fd9\u4e2a\u4e8b\u52a1\u3002\u589e\u52a0\u4e86\u91cd\u542f\u8ba1\u6570\u3002\u5982\u679c\u91cd\u542f\u7684\u6b21\u6570\u9ad8\u4e8emax_restarts\uff0cvarnish\u4f1a\u5f15\u8d77\u4e00\u4e2a\u9519\u8bef\u3002
\n \u2022vcl_miss
\n \u5982\u679c\u8bf7\u6c42\u7684\u5bf9\u8c61\u5728\u7f13\u5b58\u4e2d\u6ca1\u6709\u88ab\u627e\u5230\uff0c\u90a3\u4e48\u5728\u7f13\u5b58\u67e5\u627e\u7ed3\u675f\u540e\u88ab\u8c03\u7528\u3002\u76ee\u7684\u662f\u4e3a\u4e86\u51b3\u5b9a\u662f\u5426\u53bb\u540e\u7aef\u83b7\u53d6\u8fd9\u4e2a\u8bf7\u6c42\u5bf9\u8c61\uff0c\u5e76\u4e14\u8981\u9009\u62e9\u54ea\u4e2a\u540e\u7aef\u3002vcl_miss\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n error code [reason]\uff1a\u8fd4\u56de\u9519\u8bef\u7801\u7ed9\u5ba2\u6237\u7aef\uff0c\u4e22\u5f03\u8bf7\u6c42\u3002
\n pass\uff1a\u5207\u6362\u5230pass\u6a21\u5f0f\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_pass\u3002
\n fetch\uff1a\u53bb\u540e\u7aef\u83b7\u53d6\u8bf7\u6c42\u5bf9\u8c61\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_fetch\u3002
\n \u2022vcl_fetch
\n \u5f53\u4e00\u4e2a\u5bf9\u8c61\u88ab\u6210\u529f\u4ece\u540e\u7aef\u83b7\u53d6\u7684\u65f6\u5019\u6b64\u65b9\u6cd5\u4f1a\u88ab\u8c03\u7528\u3002vcl_fetch\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n deliver\uff1a\u53ef\u80fd\u628a\u5bf9\u8c61\u653e\u5165\u7f13\u5b58\u4e2d\uff0c\u7136\u540e\u518ddeliver\u5230\u5ba2\u6237\u7aef\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_deliver\u3002
\n error code [reason]\uff1a\u8fd4\u56de\u9519\u8bef\u7801\u7ed9\u5ba2\u6237\u7aef\uff0c\u4e22\u5f03\u8bf7\u6c42\u3002
\n esi\uff1a\u4ee5ESI\u5f62\u5f0f\u6765\u5904\u7406\u521a\u521a\u88ab\u83b7\u53d6\u5230\u7684\u5bf9\u8c61\u3002
\n pass\uff1a\u5207\u6362\u5230pass\u6a21\u5f0f\u3002\u63a7\u5236\u6743\u6700\u540e\u4f1a\u8f6c\u79fb\u5230vcl_pass\u3002
\n restart\uff1a\u91cd\u65b0\u542f\u52a8\u8fd9\u4e2a\u4e8b\u52a1\u3002\u589e\u52a0\u4e86\u91cd\u542f\u8ba1\u6570\u3002\u5982\u679c\u91cd\u542f\u7684\u6b21\u6570\u9ad8\u4e8emax_restarts\uff0cvarnish\u4f1a\u5f15\u8d77\u4e00\u4e2a\u9519\u8bef\u3002
\n \u2022vcl_deliver
\n \u5f53\u4e00\u4e2a\u7f13\u5b58\u7684\u5bf9\u8c61\u88abdeliver\u5230\u5ba2\u6237\u7aef\u7684\u65f6\u5019\uff0c\u6b64\u65b9\u6cd5\u4f1a\u88ab\u8c03\u7528\u3002vcl_deliver\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n deliver\uff1a\u53d1\u9001\u5bf9\u8c61\u5230\u5ba2\u6237\u7aef\u3002
\n error code [reason]\uff1a\u8fd4\u56de\u9519\u8bef\u7801\u7ed9\u5ba2\u6237\u7aef\uff0c\u4e22\u5f03\u8bf7\u6c42\u3002
\n restart\uff1a\u91cd\u65b0\u542f\u52a8\u8fd9\u4e2a\u4e8b\u52a1\uff0c\u589e\u52a0\u91cd\u542f\u8ba1\u6570\u3002\u5982\u679c\u91cd\u542f\u7684\u6b21\u6570\u9ad8\u4e8emax_restarts\uff0cvarnish\u4f1a\u5f15\u8d77\u4e00\u4e2a\u9519\u8bef\u3002
\n \u2022vcl_error
\n \u5f53\u9047\u89c1\u4e00\u4e2a\u9519\u8bef\u7684\u65f6\u5019\u4f1a\u88ab\u8c03\u7528\uff0c\u9519\u8bef\u53ef\u80fd\u662f\u8ddf\u540e\u7aef\u6709\u5173\u7cfb\u6216\u8005\u5185\u90e8\u9519\u8bef\u3002vcl_error\u4ee5return\u7ed3\u675f\uff0c\u53c2\u6570\u53ef\u4ee5\u4e3a\u5982\u4e0b\u5173\u952e\u5b57\uff1a
\n deliver\uff1a\u53d1\u9001\u5bf9\u8c61\u5230\u5ba2\u6237\u7aef\u3002
\n restart\uff1a\u91cd\u65b0\u542f\u52a8\u8fd9\u4e2a\u4e8b\u52a1\uff0c\u589e\u52a0\u91cd\u542f\u8ba1\u6570\u3002\u5982\u679c\u91cd\u542f\u7684\u6b21\u6570\u9ad8\u4e8emax_restarts\uff0cvarnish\u4f1a\u5f15\u8d77\u4e00\u4e2a\u9519\u8bef\u3002<\/p>\n

\u91cd\u8981\u53d8\u91cf<\/p>\n

subroutine\u4e0d\u5e26\u53c2\u6570\uff0c\u4e00\u822c\u901a\u8fc7\u5168\u5c40\u53d8\u91cf\u6765\u5b9e\u73b0\u4fe1\u606f\u7684\u4f20\u9012\u3002<\/p>\n

\u5982\u4e0b\u53d8\u91cf\u5728backend\u4e2d\u6709\u6548\uff1a
\n \u2022.host\uff1abackend\u7684\u4e3b\u673a\u540d\u6216\u8005IP\u3002
\n \u2022.port\uff1abackend\u7684\u7aef\u53e3\u3002<\/p>\n

\u5982\u4e0b\u53d8\u91cf\u5728\u5904\u7406\u4e00\u4e2a\u8bf7\u6c42\uff08\u4f8b\u5982vcl_recv\uff09\u7684\u65f6\u5019\u53ef\u7528\uff1a
\n \u2022client.ip\uff1a\u5ba2\u6237\u7aefIP\u5730\u5740\u3002
\n \u2022server.hostname\uff1a\u670d\u52a1\u5668\u7684\u4e3b\u673a\u540d\u3002
\n \u2022server.identity\uff1a\u670d\u52a1\u5668\u6807\u793a\uff0c\u5f53\u542f\u52a8varnish\u7684\u65f6\u5019\u7528\u201d-i\u201d\u53c2\u6570\u6765\u6307\u5b9a\u3002\u5982\u679cvarnish\u542f\u52a8\u65f6\u5019\u6ca1\u6709\u6307\u5b9a\u201d-i\u201d\u53c2\u6570\uff0c\u90a3\u4e48server.identity\u4f1a\u88ab\u8bbe\u7f6e\u4e3a\u7528\u201d-n\u201d\u53c2\u6570\u6240\u6307\u5b9a\u7684\u5b9e\u4f8b\u540d\u79f0\u3002
\n \u2022server.ip\uff1a\u670d\u52a1\u5668IP\u5730\u5740\u3002
\n \u2022server.port\uff1a\u670d\u52a1\u5668\u7aef\u53e3\u3002
\n \u2022req.request\uff1a\u8bf7\u6c42\u7c7b\u578b\uff08\u4f8b\u5982\u201cGET\u201d\uff0c\u201cHEAD\u201d\uff09\u3002
\n \u2022req.url\uff1a\u8bf7\u6c42\u7684URL\u3002
\n \u2022req.proto\uff1aHTTP\u534f\u8bae\u7248\u672c\u3002
\n \u2022req.backend\uff1a\u5904\u7406\u8bf7\u6c42\u7684\u540e\u7aef\u670d\u52a1\u5668\u3002
\n \u2022req.backend.healthy\uff1a\u540e\u7aef\u662f\u5426\u5065\u5eb7\u3002health check\u9700\u8981\u5728backend\u7684probe\u4e2d\u8fdb\u884c\u8bbe\u7f6e\u3002
\n \u2022req.http.header\uff1a\u76f8\u5173\u7684HTTP\u5934\u3002
\n \u2022req.hash_always_miss\uff1a\u5f3a\u8feb\u5bf9\u4e8e\u672c\u6b21\u8bf7\u6c42\u7684\u7f13\u5b58\u67e5\u627e\u7ed3\u679c\u4e3amiss\u3002\u5982\u679c\u8bbe\u7f6e\u4e3a\u201dtrue\u201d\uff0c\u90a3\u4e48varnish\u5c06\u4f1a\u5ffd\u7565\u4efb\u4f55\u5b58\u5728\u7684\u7f13\u5b58\u5bf9\u8c61\uff0c\u4e00\u76f4\u4ece\u540e\u7aef\u91cd\u65b0\u83b7\u53d6\u8d44\u6e90\u3002
\n \u2022req.hash_ignore_busy\uff1a\u5728\u7f13\u5b58\u67e5\u627e\u65f6\u5019\u5ffd\u7565\u4efb\u4f55\u5fd9\u7684\u5bf9\u8c61\u3002\u5982\u679c\u6709\u4e24\u4e2a\u670d\u52a1\u5668\uff0c\u5f7c\u6b64\u4e92\u76f8\u67e5\u627e\u7f13\u5b58\u5185\u5bb9\uff0c\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u53d8\u91cf\u6765\u907f\u514d\u6f5c\u5728\u7684\u6b7b\u9501\u3002<\/p>\n

\u5982\u4e0b\u53d8\u91cf\u5728\u51c6\u5907\u4e00\u4e2a\u540e\u7aef\u8bf7\u6c42(\u6bd4\u5982\u5728cache miss\u6216\u8005pass,pipe\u6a21\u5f0f)\u7684\u65f6\u5019\u53ef\u7528\uff1a
\n \u2022bereq.request\uff1a\u8bf7\u6c42\u7684\u7c7b\u578b\uff08\u6bd4\u5982\u201cGET\u201d\uff0c\u201cHEAD\u201d\uff09\u3002
\n \u2022bereq.url\uff1a\u8bf7\u6c42\u7684URL\u3002
\n \u2022bereq.proto\uff1a\u4e0e\u540e\u7aef\u670d\u52a1\u5668\u4ea4\u4e92\u7684HTTP\u534f\u8bae\u7248\u672c\u3002
\n \u2022bereq.http.header\uff1a\u76f8\u5173\u7684HTTP\u5934\u3002
\n \u2022bereq.connect_timeout\uff1a\u4e0e\u540e\u7aef\u8fde\u63a5\u7684\u8d85\u65f6\u65f6\u95f4\u3002
\n \u2022bereq.first_byte_timeout\uff1a\u4ece\u540e\u7aef\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5b57\u8282\u6240\u9700\u7b49\u5f85\u7684\u79d2\u6570\uff0c\u5728pipe\u6a21\u5f0f\u4e2d\u4e0d\u53ef\u7528\u3002
\n \u2022bereq.between_bytes_timeout\uff1a\u4ece\u540e\u7aef\u8fd4\u56de\u7684\u6bcf\u4e2a\u5b57\u8282\u4e4b\u95f4\u7684\u65f6\u95f4\u95f4\u9694\uff0c\u4ee5\u79d2\u8ba1\u3002\u5728pipe\u6a21\u5f0f\u4e2d\u4e0d\u53ef\u7528\u3002<\/p>\n

\u5982\u4e0b\u7684\u53d8\u91cf\u5728\u8bf7\u6c42\u5bf9\u8c61\u4ece\u540e\u7aef\u8fd4\u56de\u4e4b\u540e\uff0c\u5728\u5176\u88ab\u653e\u5165\u7f13\u5b58\u4e4b\u524d\u53ef\u7528\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u4e5f\u5c31\u662f\u5728vcl_fetch\u4e2d\u53ef\u7528\u3002
\n \u2022beresp.proto\uff1aHTTP\u534f\u8bae\u7248\u672c\u3002
\n \u2022beresp.status\uff1a\u540e\u7aef\u8fd4\u56de\u7684HTTP\u72b6\u6001\u7801\uff08\u4f8b\u5982200,302\u7b49\uff09\u3002
\n \u2022beresp.response\uff1a\u540e\u7aef\u8fd4\u56de\u7684\u72b6\u6001\u5185\u5bb9\uff08\u4f8b\u5982\u201cOK\u201d\uff0c\u201cFound\u201d\uff09\u3002
\n \u2022beresp.cacheable\uff1a\u5982\u679c\u8bf7\u6c42\u7684\u7ed3\u679c\u662f\u53ef\u4ee5\u88ab\u7f13\u5b58\u7684\uff0c\u90a3\u4e48\u6b64\u53d8\u91cf\u4e3a\u201dtrue\u201d\u3002\u5982\u679cHTTP\u72b6\u6001\u7801\u4e3a200, 203, 300, 301, 302, 404\uff0c410\u4e4b\u4e00\u5e76\u4e14pass\u6ca1\u6709\u5728vcl_recv\u4e2d\u88ab\u8c03\u7528\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7ed3\u679c\u5c31\u662f\u53ef\u4ee5\u88ab\u7f13\u5b58\u7684\u3002\u5982\u679cresponse\u7684TTL\u548cgrace time\u90fd\u4e3a0\uff0c\u90a3\u4e48beresp.cacheable\u5c06\u4f1a\u4e3a0\u3002beresp.cacheable\u662f\u53ef\u5199\u7684\u3002
\n \u2022beresp.ttl\uff1a\u7f13\u5b58\u5bf9\u8c61\u7684\u751f\u5b58\u65f6\u95f4\uff0c\u4ee5\u79d2\u4e3a\u5355\u4f4d\uff0c\u8fd9\u4e2a\u53d8\u91cf\u662f\u53ef\u5199\u7684\u3002<\/p>\n

\u5728\u5bf9\u8c61\u5df2\u7ecf\u5b58\u5728\u4e8e\u7f13\u5b58\u4e2d\u5e76\u88ab\u67e5\u8be2\u5230\u7684\u65f6\u5019\uff0c\u4e00\u822c\u5728vcl_hit\u548cvcl_deliver\u4e2d\uff0c\u5982\u4e0b\u7684\u53d8\u91cf\uff08\u5927\u90e8\u5206\u662fread-only\uff09\u53ef\u7528\uff1a
\n \u2022obj.proto\uff1a\u4e0e\u540e\u7aef\u4ea4\u4e92\u7684HTTP\u7248\u672c\u534f\u8bae\u3002
\n \u2022obj.status\uff1a\u540e\u7aef\u8fd4\u56de\u7684HTTP\u72b6\u6001\u7801\u3002
\n \u2022obj.response\uff1a\u540e\u7aef\u8fd4\u56de\u7684HTTP\u72b6\u6001\u5185\u5bb9\u3002
\n \u2022obj.cacheable\uff1a\u5982\u679c\u5bf9\u8c61\u7684beresp.cacheable\u4e3a\u201dtrue\u201d\uff0c\u90a3\u4e48\u6b64\u53d8\u91cf\u7684\u503c\u4e3a\u201dtrue\u201d\u3002\u9664\u975e\u4f60\u5f3a\u5236delivery\uff0c\u5426\u5219obj.cacheable\u4e00\u76f4\u4e3a\u201dtrue\u201d\u3002
\n \u2022obj.ttl\uff1a\u7f13\u5b58\u5bf9\u8c61\u7684\u751f\u5b58\u65f6\u95f4\uff0c\u4ee5\u79d2\u4e3a\u5355\u4f4d\uff0c\u8fd9\u4e2a\u53d8\u91cf\u662f\u53ef\u5199\u7684\u3002
\n \u2022obj.lastuse\uff1a\u4ece\u73b0\u5728\u5230\u5bf9\u8c61\u6700\u8fd1\u4e00\u6b21\u8bbf\u95ee\u6240\u95f4\u9694\u7684\u65f6\u95f4\uff0c\u4ee5\u79d2\u4e3a\u5355\u4f4d\u3002
\n \u2022obj.hits\uff1a\u5bf9\u8c61\u88ab\u53d1\u9001\u5230\u5ba2\u6237\u7aef\u7684\u6b21\u6570\uff0c0\u8868\u793a\u7f13\u5b58\u67e5\u8be2miss\u4e86\u3002<\/p>\n

\u5982\u4e0b\u53d8\u91cf\u5728\u51b3\u5b9a\u5bf9\u8c61hash key\u7684\u65f6\u5019\u53ef\u7528\uff1a
\n \u2022req.hash\uff1ahash key\u88ab\u7528\u6765\u5173\u8054\u4e00\u4e2a\u7f13\u5b58\u4e2d\u7684\u5bf9\u8c61\u3002\u5728\u8bfb\u5199\u7f13\u5b58\u7684\u65f6\u5019\u90fd\u4f1a\u88ab\u7528\u5230\u3002<\/p>\n

\u5982\u4e0b\u53d8\u91cf\u5728\u51c6\u5907\u628a\u4e00\u4e2a\u54cd\u5e94\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u65f6\u5019\u53ef\u7528\uff1a
\n \u2022resp.proto\uff1a\u54cd\u5e94\u4f7f\u7528\u7684HTTP\u534f\u8bae\u7248\u672c\u3002
\n \u2022resp.status\uff1a\u5c06\u8981\u8fd4\u56de\u7684HTTP\u72b6\u6001\u7801\u3002
\n \u2022resp.response\uff1a\u5c06\u8981\u8fd4\u56de\u7684HTTP\u72b6\u6001\u5185\u5bb9\u3002
\n \u2022resp.http.header\uff1a\u76f8\u5173\u7684HTTP\u5934\u3002<\/span>
\n<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

vcl_init<\/span><\/strong><\/span> <\/p>\n

Called when VCL is loaded, before any requests pass through it. Typically used to initialize VMODs.<\/p>\n

\u5f53VCL\u52a0\u8f7d\u65f6\u8c03\u7528\uff0c\u4e4b\u540e\u52a0\u8f7d\u5ba2\u6237\u8bf7\u6c42\u3002\u4e00\u822c\u7528\u4e8e\u521d\u59cb\u5316VMOD\u6a21\u5757\u3002<\/p>\n

return() values:<\/p>\n

\u8fd4\u56de\u503c\u6709\uff1a<\/p>\n

ok <\/strong>Normal return, VCL continues lo...<\/p>\n

\u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[284],"tags":[38],"class_list":["post-332","post","type-post","status-publish","format-standard","hentry","category-webserver","tag-varnish"],"_links":{"self":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/comments?post=332"}],"version-history":[{"count":0,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/332\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/media?parent=332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/categories?post=332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/tags?post=332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}