{"id":497,"date":"2017-11-29T16:32:56","date_gmt":"2017-11-29T08:32:56","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=497"},"modified":"2017-11-29T16:32:56","modified_gmt":"2017-11-29T08:32:56","slug":"%e4%b8%80%e4%b8%aa%e6%9c%88%e7%9a%84%e8%89%b0%e8%be%9b%e7%a8%b3%e5%ae%9a%e6%9c%8d%e5%8a%a1%e8%bf%87%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=497","title":{"rendered":"\u4e00\u4e2a\u6708\u7684\u8270\u8f9b\u7a33\u5b9a\u670d\u52a1\u8fc7\u7a0b"},"content":{"rendered":"

\u4e1a\u52a1\u5927\u4e86\u6210\u672c\u95ee\u9898\u66f4\u52a0\u7684\u51f8\u663e\uff0c\u6700\u91cd\u8981\u7684\u4e4b\u4e00\u5c31\u662f\u5e26\u5bbd\uff0c\u4e3a\u4e86\u66f4\u597d\u7684\u4f18\u5316\u8d44\u6e90\uff0c\u6211\u4eec\u51b3\u5b9a\u5c06\u76ee\u524d BGP \u5168\u7ebf\u7684\u6d41\u91cf\u5207\u6362\u4e00\u90e8\u5206\u5230\u53cc\u7ebf\u4e0a\u53bb\u3002\u8bf4\u767d\u4e86\u5f88\u7b80\u5355\uff0c\u7f51\u7edc\u65b9\u9762\u4e0d\u9700\u8981\u52a8\u4ec0\u4e48\u5927\u624b\u811a\uff0c\u5168\u7f51 10G \u7684\u94fe\u8def\u534a\u5e74\u4e4b\u524d\u5c31\u5168\u90e8\u5347\u7ea7\u5b8c\u6bd5\uff0c\u5269\u4e0b\u7684\u5c31\u662f\u52a0\u524d\u7aef\uff0c10G \u670d\u52a1\u5668\uff0cLVS(nat), Keepalived\uff0cNginx\u3002\u63a5\u4e0b\u6765\u5c31\u662f\u5c0f\u6d41\u91cf\u7684\u4e0a\u7ebf\u6d4b\u8bd5\uff0c\u4ece 10M \u5230 50M \u5230 100M \u518d\u5230 300M \u524d\u540e\u5927\u6982\u6709\u4e00\u5468\u7684\u89c2\u5bdf\u65f6\u95f4\uff0c\u6574\u4f53\u8fd8\u662f\u5f88\u7a33\u5b9a\u7684\uff0c\u5f53\u7136\u4e5f\u9047\u5230\u4e86\u4e00\u4e9b\u5c0f\u95ee\u9898\uff0c\u6bd4\u5982 10G \u7f51\u5361\u4e0d\u89c4\u5219\u7684\u51fa\u73b0\u4e86\u4e00\u4e9b rx_crc_errors\/rx_missed_errors\uff0c\u901a\u8fc7\u4f18\u5316\u4e00\u4e9b\u786c\u4ef6\u8bbe\u5907\u57fa\u672c\u5f97\u5230\u4e86\u89e3\u51b3\uff0c\u867d\u7136\u540e\u671f\u8fd8\u4f1a\u65f6\u4e0d\u65f6\u7684\u5192\u51fa\u4e00\u4e9b\uff0c\u4f46\u662f\u4ece\u5404\u4e2a\u670d\u52a1\u4ee5\u53ca\u4e1a\u52a1\u7684\u76d1\u63a7\u65b9\u9762\u6ca1\u6709\u770b\u5230\u6f5c\u5728\u7684\u5f71\u54cd\uff0c\u6682\u65f6\u7565\u8fc7\u3002<\/p>\n

\u6b63\u6240\u8c13\u7a33\u5b9a\u538b\u5012\u4e00\u5207\uff0c\u4ece\u5f00\u59cb\u5c0f\u6d41\u91cf\u5207\u6362\u5230\u6b63\u5f0f\u5168\u91cf\u4e0a\u7ebf\u7684\u8fd9\u4e00\u4e2a\u6708\uff0c\u4e3a\u4e86\u7a33\u5b9a\uff0c\u5145\u6ee1\u4e86\u574e\u5777\uff0c\u4e0b\u9762\u662f\u8fd9\u4e00\u6bb5\u65f6\u95f4\u9047\u5230\u7684\u4e00\u4e9b\u6bd4\u8f83\u6709\u6311\u6218\u7684\u4e8b\u4ef6\uff0c \u300c\u5f88\u4e0d\u5e78\u7684\u662f\u300d\uff0c\u5168\u90e8\u662f\u4eba\u4e3a\u539f\u56e0\u3002<\/p>\n

4xx \u9519\u8bef\u98d9\u5347
\n\u4e00\u5468\u4e4b\u540e\u7684\u67d0\u4e2a\u65e9\u4e0a\u6536\u5230\u62a5\u8b66\uff0c4xx, 5xx \u7684\u9519\u8bef\u4e0a\u5347\u4e86\u5927\u6982\u4e00\u500d\u7684\u6837\u5b50:
\n\"\"
\n\u53ef\u4ee5\u786e\u8ba4\u7684\u662f\u8fd9\u6bb5\u65f6\u95f4\u6ca1\u6709\u4efb\u4f55\u7684\u53d8\u66f4\uff0c\u4ece\u5230\u540e\u7aef\u7684\u8bf7\u6c42\u6765\u770b\uff0c\u8fd9\u6bb5\u65f6\u95f4\u7684\u5f02\u5e38\u5e76\u6ca1\u6709\u5bf9\u5176\u6709\u5f88\u5927\u7684\u5f71\u54cd\uff0c\u4f46\u662f\u672c\u7740\u8d1f\u8d23\u4efb\u7684\u6001\u5ea6\u8fd8\u662f\u628a\u5f53\u65f6\u7684 log \u5f52\u6863\u62ff\u51fa\u6765\u5206\u6790\u4e86\u4e0b\u8be6\u60c5:
\n\"\"
\n\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u6bb5\u65f6\u95f4\u7684 return code \u4e3b\u8981\u662f\u7531 499 \u4ee5\u53ca 500 \u9519\u8bef\u5f15\u8d77\uff0c\u5e76\u4e14 499 \u7684\u9519\u8bef\u5360\u4e86\u5927\u90e8\u5206\u7684\uff0c\u90a3\u5c31\u4ece 499 \u7684\u5206\u6790\u5f00\u59cb\u3002G \u4e86\u4e00\u756a<\/a>\uff0c\u53d1\u73b0\u8fd9\u4e2a code \u5e76\u975e\u662f\u4e00\u4e2a\u6807\u51c6\u7684 RFC\uff0c\u552f\u4e00\u53ef\u4ee5\u786e\u8ba4\u7684\u5c31\u662f\u662f\u5ba2\u6237\u7aef\u4e3b\u52a8\u7684\u5173\u95ed\u4e86\u94fe\u63a5\uff0c\u81f3\u4e8e\u662f\u4ec0\u4e48\u539f\u56e0\u8ba9\u5ba2\u6237\u7aef\u4e3b\u52a8\u5173\u95ed\u7684\uff0c\u539f\u56e0\u5c31\u592a\u591a\u4e86\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u90e8\u5206\u7684\u7a33\u5b9a\u7684\u00a0408 \u9519\u8bef<\/a>\uff0c\u8fd9\u4e2a\u6bd4\u8f83\u597d\u7406\u89e3\uff0c\u5bf9\u4e8e\u7531\u4e8e Nginx \u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u8bf7\u6c42\u4f1a\u9020\u6210\u8d85\u65f6\u800c\u8fd4\u56de 408\u3002
\n\u770b\u4e86\u4e0a\u9762\u7684\u89e3\u91ca\uff0c\u57fa\u672c\u5f97\u4e0d\u5230\u5f88\u660e\u786e\u7684\u7b54\u6848\u3002\u63a5\u4e0b\u6765\uff0c\u81f3\u5c11\u8fd8\u53ef\u4ee5\u4ece debug log \u4ee5\u53ca error log \u5165\u624b\uff0c\u770b\u770b\u80fd\u5426\u5f97\u5230\u4e00\u4e9b\u4fe1\u606f\u3002
\n\u9996\u5148\u770b\u770b error log\uff0c\u5173\u4e8e Nginx \u7684 access, error log \u4e0d\u5c11\u4eba\u90fd\u6709\u8bef\u89e3\uff0c\u8fd9\u91cc\u7edf\u4e00\u8bf4\u660e\u4e00\u4e0b\uff1a
\n1. access log \u7684\u975e 2xx \u9519\u8bef\u53ea\u6709\u90e8\u5206\u7684\u4f1a\u6253\u5230 err log \u91cc\u9762\uff0c\u4ec5\u4ec5\u662f\u90e8\u5206\uff0c\u800c access log \u662f\u6240\u6709\u7684 return code \u7684\u96c6\u5408
\n2. error log \u5e76\u975e\u662f\u4e00\u4e9b\u975e 2xx code \u7684\u96c6\u5408\uff0c\u91cc\u9762\u5f88\u591a\u90fd\u662f\u5f00\u53d1\u5b9a\u5236\u7684\u4e00\u4e9b\u4e1c\u897f\uff0c\u4ee3\u7801\u90fd\u662f\u5199\u6b7b\u7684
\n3. \u6240\u4ee5\uff0c\u4efb\u4f55\u7684\u8fd4\u56de\u7801(2xx, 4xx, 5xx)\u7684\u95ee\u9898\u90fd\u53ef\u4ee5\u4ece access log \u91cc\u9762\u627e\u5230\u95ee\u9898
\n\u770b err log\uff0c\u5927\u90e8\u5206\u90fd\u662f\u4e0b\u9762\u4e24\u79cd\u60c5\u5f62:
\n1. “no live upstreams while connecting to upstream”
\n2. “upstream timed out(110: Connection timed out) while reading response reader from upstream”
\n\u603b\u7ed3\u8d77\u6765\u5c31\u662f\u8fde\u4e0d\u4e0a upstream \u4e86\uff0c\u4e3a\u4ec0\u4e48\u4f1a time out \u5e76\u4e0d\u77e5\u9053\u3002\u518d\u770b\u770b debug log\uff0c\u8fd9\u4e2a\u9700\u8981\u5728\u7f16\u8bd1\u7684\u65f6\u5019\u52a0\u8fdb \u2013with-debug\uff0c\u91cc\u9762\u80fd\u5f97\u5230\u7684\u4fe1\u606f\u540c\u6837\u6bd4\u8f83\u5c11:
\n\u2026
\n2026\/08\/02 15:29:14 [debug] 58443#0: *26274947 http upstream recv(): -1 (11: Resource temporarily unavailable)
\n\u2026
\n2026\/08\/02 15:29:14 [debug] 58443#0: *26274956 recv() not ready (11: Resource temporarily unavailable)
\n\u2026
\n\u8c03\u67e5\u5230\u4e86\u8fd9\u91cc\uff0c\u57fa\u672c\u4ece\u5df2\u6709\u7684\u4fe1\u606f\u6ca1\u5f97\u5230\u4ec0\u4e48\u7279\u522b\u7684\u7ed3\u8bba\uff0c\u8003\u8651\u5230\u5bf9\u540e\u7aef\u672c\u8eab\u5e76\u6ca1\u6709\u5f71\u54cd\uff0c\u8fd9\u4e8b\u5c31\u8fd9\u4e48\u88ab\u653e\u8fc7\u53bb\u4e86\u3002\u4f46\u662f\uff0c\u518d\u600e\u4e48\u9003\u907f\u4e5f\u9003\u907f\u4e0d\u4e86\u58a8\u83f2\u5b9a\u5f8b\u3002<\/p>\n

logrotate(gzip) \u7684\u95ee\u9898
\n\u51e0\u5929\u4e4b\u540e\u7684\u67d0\u4e2a\u665a\u4e0a\uff0c\u7a81\u7136\u6536\u5230\u62a5\u8b66\uff0cipvs master \u4e0a\u7684 rs \u88ab\u79fb\u9664\uff0c\u7d27\u63a5\u7740 ipvs slave \u4e0a\u7684 rs \u4e5f\u88ab\u79fb\u9664\uff0c\u63a5\u4e0b\u6765\u5c31\u662f\u75af\u72c2\u7684\u77ed\u4fe1\u8f70\u70b8\u4e86\uff0c\u4e00\u4f1a\u513f add\uff0c\u4e00\u4f1a\u513f remove\u3002\u5f53\u65f6\u6211\u4e0d\u5728\u73b0\u573a\uff0c\u8ba9\u6211\u4eec\u540c\u4e8b\u5148\u4e34\u65f6\u624b\u52a8\u628a vip \u4ece\u76ee\u524d\u7684 master \u5207\u6362\u5230\u4e86 slave\uff0c\u4f46\u662f\u4e0d\u89c1\u597d\u8f6c\uff0c\u5f53\u673a\u7acb\u65ad\uff0c\u76f4\u63a5\u5168\u90e8\u5207\u6362\u5230\u5168\u7ebf\uff0c\u5ba2\u6237\u7aef\u7531\u4e8e\u4f1a cache \u4ee5\u53ca\u91cd\u53d1\u673a\u5236\uff0c\u6240\u4ee5\u8fd9 20min \u7684 outage(\u53d1\u5230\u540e\u7aef\u7684\u8bf7\u6c42\u5927\u6982\u8dcc\u4e86 2\/3) \u5bf9\u5b9e\u9645\u7684\u5f71\u54cd\u5e76\u4e0d\u662f\u5f88\u5927\u3002\u56de\u53bb\u4e4b\u540e\u5f00\u59cb\u91cd\u70b9\u5206\u6790\u8fd9\u6b21\u4e8b\u6545\u3002
\n\u9996\u5148\u662f\u628a dr, rs \u5305\u62ec traffic, req, lvs conn, Nginx return code\/status, \u5404\u79cd rt\/delay \u5728\u5185\u7684\u6838\u5fc3\u76d1\u63a7\u4e00\u6b65\u4e00\u6b65\u5206\u6790\u56de\u6eaf\uff0c\u7406\u6e05\u4e86\u4ece\u95ee\u9898\u5f00\u59cb\u4e00\u76f4\u5230\u6062\u590d\u8fd9\u4e2d\u95f4\u53d1\u751f\u7684\u6bcf\u4e00\u6b65\u8fc7\u7a0b\uff0c\u53d1\u73b0\u7684\u6700\u5927\u7684\u6536\u83b7\u662f\u51fa\u95ee\u9898\u7684\u8fd9\u6bb5\u65f6\u95f4\uff0clvs \u5230 rs \u7684\u5ef6\u65f6\u5927\u5927\u589e\u52a0:
\n\"\"
\n\u5176\u6b21\uff0ckeepalived \u6253\u5230 messages \u91cc\u9762\u7684 log \u4e5f\u770b\u5230\u4e86\u4e0d\u5c11\u7684\u4e1c\u897f\uff0c\u6bd4\u5982\u8fd9\u6bb5\u65f6\u95f4\uff0c\u4f1a\u9891\u7e41\u7684 add, remove rs:
\nSep\u00a0 6 20:20:10 lvs-1 Keepalived_healthcheckers[107592]: TCP connection to [192.168.90.6]:80 success.
\nSep\u00a0 6 20:20:10 lvs-1 Keepalived_healthcheckers[107592]: Adding service [192.168.90.6]:80 to VS [111.111.111.4]:80
\nSep\u00a0 6 20:20:14 lvs-1 Keepalived_healthcheckers[107592]: TCP connection to [192.168.90.5]:80 failed !!!
\nSep\u00a0 6 20:20:14 lvs-1 Keepalived_healthcheckers[107592]: Removing service [192.168.90.5]:80 from VS [111.111.111.4]:80
\nSep\u00a0 6 20:20:20 lvs-1 Keepalived_healthcheckers[107592]: TCP connection to [192.168.90.5]:80 success.
\nSep\u00a0 6 20:20:20 lvs-1 Keepalived_healthcheckers[107592]: Adding service [192.168.90.5]:80 to VS [111.111.111.4]:80<\/p>\n

\u628a log \u7684\u65f6\u95f4\u6269\u5c55\u5230\u4e09\u5929\u524d\uff0c\u518d\u4ed4\u7ec6\u7684\u89c2\u5bdf\u89c2\u5bdf\uff0c\u53ef\u4ee5\u53d1\u73b0\uff0c\u6bcf\u4e00\u6b21 add, remove \u7684\u64cd\u4f5c\u90fd\u662f\u51fa\u73b0\u5728\u6574\u70b9\u7684\u65f6\u5019:
\nSep\u00a0 6 12:00:15 lvs-1 Keepalived_healthcheckers[107592]: TCP connection to [192.168.90.5]:80 failed !!!
\nSep\u00a0 6 12:00:15 lvs-1 Keepalived_healthcheckers[107592]: Removing service [192.168.90.5]:80 from VS [111.111.111.4]:80
\n\u2026
\nSep\u00a0 6 15:00:11 lvs-1 Keepalived_healthcheckers[107592]: TCP connection to [192.168.90.5]:80 failed !!!
\nSep\u00a0 6 15:00:11 lvs-1 Keepalived_healthcheckers[107592]: Removing service [192.168.90.5]:80 from VS [111.111.111.4]:80
\n\u2026<\/p>\n

\u8054\u60f3\u5230\u6574\u70b9 ngx \u4f1a\u8fdb\u884c logrotate \u7684\u64cd\u4f5c\uff0c\u671f\u95f4\u4f1a\u4ea7\u751f\u5927\u91cf\u7684 io\uff0c\u5bfc\u81f4\u7cfb\u7edf\u8d1f\u8f7d\u53d8\u9ad8\uff0c\u518d\u52a0\u4e0a ngx \u672c\u8eab\u5904\u7406 req \u4f1a\u6709\u4e00\u5b9a\u7684\u8d1f\u8f7d\uff0c\u5bfc\u81f4 lvs \u76d1\u6d4b\u5230 rs \u65e0\u6cd5\u54cd\u5e94\u7684\u72b6\u6001\u3002
\n\u901a\u8fc7\u76d1\u63a7\u53ef\u4ee5\u53d1\u73b0\uff0c\u6bcf\u4e2a\u6574\u70b9\u7684 load \u90fd\u4f1a\u53d8\u5927:
\n\"\"
\n\u4ece\u4e0a\u56fe\u53ef\u4ee5\u53d1\u73b0\uff0c\u6574\u70b9\u7684\u8fd9\u4e00\u5c0f\u6bb5\u65f6\u95f4\uff0cload \u81f3\u5c11\u4f1a\u8d85\u8fc7 1\uff0c\u8ddf 24 \u6838\u7684\u673a\u5668\u6bd4\uff0c\u4f3c\u4e4e\u975e\u5e38\u7684\u5c0f\uff0c\u4f46\u662f\u9700\u8981\u8003\u8651\u7684\u4e00\u70b9\u662f\uff0c\u6211\u4eec\u7684\u91c7\u96c6 load \u7684\u76d1\u63a7\u662f 60s \u4e00\u6b21\uff0c\u76d1\u63a7\u5b9e\u73b0\u79d2\u7ea7\u7684\u6210\u672c\u592a\u5927\uff0c\u5b9e\u9645\u5728 60s \u5185\u7cfb\u7edf\u7684\u8d1f\u8f7d\u4f1a\u6bd4\u4e0a\u56fe\u7684\u5927\u5f97\u591a\u3002
\n\u4e3a\u4e86\u9a8c\u8bc1\u8fd9\u4e2a\u95ee\u9898\uff0c\u624b\u52a8\u7684\u6a21\u62df\u4e00\u6b21 logrotate(gzip) \u7684\u64cd\u4f5c\uff0c\u5e73\u5747\u4e00\u5c0f\u65f6\u7684 log \u91cf\u5728 5G \u5de6\u53f3\u3002\u4e0b\u9762\u7684\u662f\u624b\u52a8\u6267\u884c\u4e00\u6b21 logroate \u64cd\u4f5c\u5f97\u5230\u7684\u76d1\u63a7\u6570\u636e\uff0c\u53ef\u4ee5\u770b\u5230\u9ad8\u5cf0\u65f6\u6bb5\uff0c\u8fd9\u5757\u666e\u901a\u7684 SAS \u76d8\u7684 io util \u8fbe\u5230\u4e86 100%\uff0c\u78c1\u76d8\u5199\u541e\u5410\u8fbe\u5230\u4e86 245M\/s\uff0cload \u5cf0\u503c\u8d85\u8fc7 10:
\n04:06:00 CST\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DEV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tps\u00a0 rd_sec\/s\u00a0 wr_sec\/s\u00a0 avgrq-sz\u00a0 avgqu-sz\u00a0\u00a0\u00a0\u00a0 await\u00a0\u00a0\u00a0\u00a0 svctm\u00a0\u00a0\u00a0\u00a0 %util
\n04:06:01 CST\u00a0\u00a0\u00a0 dev8-0\u00a0\u00a0\u00a0 702.06\u00a0\u00a0\u00a0\u00a0 24.74 711958.76\u00a0\u00a0 1014.13\u00a0\u00a0\u00a0 145.91\u00a0\u00a0\u00a0 208.25\u00a0\u00a0\u00a0\u00a0\u00a0 1.47\u00a0\u00a0\u00a0 103.20
\n04:06:02 CST\u00a0\u00a0\u00a0 dev8-0\u00a0\u00a0\u00a0 701.01\u00a0\u00a0\u00a0\u00a0\u00a0 8.08 704840.40\u00a0\u00a0 1005.48\u00a0\u00a0\u00a0 146.79\u00a0\u00a0\u00a0 208.00\u00a0\u00a0\u00a0\u00a0\u00a0 1.44\u00a0\u00a0\u00a0 101.01
\n04:06:03 CST\u00a0\u00a0\u00a0 dev8-0\u00a0\u00a0\u00a0 677.55\u00a0\u00a0\u00a0\u00a0\u00a0 0.00 681755.10\u00a0\u00a0 1006.20\u00a0\u00a0\u00a0 144.27\u00a0\u00a0\u00a0 213.12\u00a0\u00a0\u00a0\u00a0\u00a0 1.51\u00a0\u00a0\u00a0 102.04
\n04:06:04 CST\u00a0\u00a0\u00a0 dev8-0\u00a0\u00a0\u00a0 672.45\u00a0\u00a0\u00a0\u00a0\u00a0 8.16 681608.16\u00a0\u00a0 1013.63\u00a0\u00a0\u00a0 141.47\u00a0\u00a0\u00a0 210.12\u00a0\u00a0\u00a0\u00a0\u00a0 1.52\u00a0\u00a0\u00a0 102.04
\n04:06:05 CST\u00a0\u00a0\u00a0 dev8-0\u00a0\u00a0 1364.65\u00a0\u00a0\u00a0\u00a0\u00a0 0.00 694884.85\u00a0\u00a0\u00a0 509.21\u00a0\u00a0\u00a0 122.71\u00a0\u00a0\u00a0\u00a0 91.27\u00a0\u00a0\u00a0\u00a0\u00a0 0.74\u00a0\u00a0\u00a0 100.91<\/p>\n

\u8fd9\u603b\u7b97\u662f\u627e\u5230 lvs \u9891\u53d1 add, remove \u7684\u539f\u56e0\u4e86\uff0c\u63a5\u4e0b\u6765\u6539\u8fdb\u5c31\u76f8\u5bf9\u6bd4\u8f83\u7b80\u5355\u4e86:
\n1. lvs \u5bf9 ngx \u4e0d\u8981\u592a\u654f\u611f\uff0c\u8fd9\u4e2a\u5728 timeout \u7684\u4e00\u4e9b\u8bbe\u7f6e\u4e0a\u9002\u5f53\u7684\u52a0\u5927\u53ef\u4ee5\u7f13\u89e3
\n2. ngx \u7684 log \u5904\u7406\u95ee\u9898\uff0c\u6700\u521d\u6709\u540c\u5b66\u63d0\u8bae\u53ea\u5f00\u4e00\u53f0 rs \u7684log\uff0c\u5176\u4ed6\u7684\u5168\u90e8\u5173\u95ed\uff0c\u8fd9\u4e2a\u770b\u4e0a\u53bb\u4f3c\u4e4e\u53ef\u884c\uff0c\u5f00\u4e00\u53f0\u57fa\u672c\u53ef\u4ee5\u4ee3\u8868\u5176\u4ed6 rs \u7684\u60c5\u51b5\uff0c\u4f46\u662f\u5b9e\u9645\u60c5\u51b5\u53ef\u80fd\u5e76\u975e\u6211\u4eec\u6240\u80fd\u60f3\u50cf\uff0c\u5982\u679c\u6ca1\u6709\u5f00\u542f access \u7684\u673a\u5668\u51fa\u73b0\u4e86\u95ee\u9898\u800c\u5f00\u542f\u7684\u6bcf\u6709\u4efb\u4f55\u95ee\u9898\uff0c\u540e\u7eed\u7684\u95ee\u9898\u6392\u67e5\u5c06\u4f1a\u6bd4\u8f83\u7684\u9ebb\u70e6\u3002\u6240\u4ee5\uff0c\u4e0d\u7ba1\u5982\u4f55\uff0c\u4fdd\u7559\u4e00\u5206\u5168\u91cf\u7684 log \u8fd8\u662f\u975e\u5e38\u6709\u5fc5\u8981\u7684\u3002\u5bf9\u6b64\uff0c\u6bd4\u8f83\u901a\u7528\u7684\u505a\u6cd5\u5c06 Nginx \u901a\u8fc7 syslog \u76f4\u63a5\u4f20\u5230\u7684\u8fdc\u7aef\u7684\u673a\u5668\u4e0a\uff0c\u672c\u5730\u4fdd\u7559\u4e00\u5206\u5168\u91cf\u7684\uff0c\u4f46\u662f\u4e0d\u5f00\u542f logrotate \u7684 gzip \u538b\u7f29\u3002
\n3. \u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u8003\u8651\u901a\u8fc7 access_log, error_log \u7684 ratio \u6765\u63a7\u5236\u4ea7\u751f log \u7684\u6bd4\u4f8b<\/p>\n

Nginx open file \u7684\u95ee\u9898
\n\u8fd9\u4e2a\u95ee\u9898\u5230\u6b64\u7ed3\u675f\uff0c\u8fd9\u6837\u5b89\u7a33\u7684\u8fc7\u4e86\u56db\u5929\uff0c\u67d0\u5929\u665a\u4e0a messages \u91cc\u9762\u53d1\u73b0 keepalived \u9891\u7e41\u7684 add, remove rs \u4e86\uff0c\u8fd9\u6b21\u65f6\u95f4\u4e0d\u662f\u6574\u70b9\u4e86\uff0c\u867d\u7136\u53ea\u51fa\u73b0\u4e86\u4e00\u4e24\u6b21\uff0c\u4f46\u662f\u53ef\u4ee5\u66b4\u9732\u51fa\u6574\u4e2a\u96c6\u7fa4\u8fd8\u662f\u5904\u4e8e\u4e00\u4e2a\u4e0d\u7a33\u5b9a\u7684\u72b6\u6001\uff0c\u6700\u521d\u6211\u4eec\u8ba4\u4e3a\u662f TCP_CHECK \u7684\u68c0\u6d4b\u673a\u5236\u6709\u95ee\u9898\uff0c\u592a\u8fc7\u654f\u611f\uff0c\u4e8e\u662f\u6362\u6210\u4e86 HTTP_GET \u7684\u65b9\u5f0f\uff0c\u4f46\u662f\u7b2c\u4e8c\u5929\u4ecd\u7136\u65f6\u4e0d\u65f6\u7684\u62a5\u9519\uff0c\u5e76\u4e14\u4ece\u65f6\u95f4\u4e0a\u6765\u770b\u5b8c\u5168\u6ca1\u6709\u89c4\u5f8b:
\nSep 10 17:15:19 lvs-2-2399 Keepalived_healthcheckers[34943]: MD5 digest error to [192.168.90.6]:80 url[\/], MD5SUM [f9943d27e3420479271984e01dfe85dd].
\nSep 10 17:15:19 lvs-2-2399 Keepalived_healthcheckers[34943]: Removing service [192.168.90.6]:80 from VS [124.251.33.4]:80
\nSep 10 17:15:22 lvs-2-2399 Keepalived_healthcheckers[34943]: MD5 digest success to [192.168.90.6]:80 url(1).
\nSep 10 17:15:28 lvs-2-2399 Keepalived_healthcheckers[34943]: Remote Web server [192.168.90.6]:80 succeed on service.
\n\u6839\u636e keepalived_healthcheckers \u68c0\u6d4b\u7684\u903b\u8f91\u6765\u770b\uff0c\u80af\u5b9a\u662f\u53d1\u73b0 http:\/\/192.168.90.6\/ \u8fd4\u56de\u7684\u4e0d\u662f\u65e2\u5b9a\u7684 md5sum \u503c\uff0c\u624d\u89e6\u53d1\u4e86 remove \u64cd\u4f5c\uff0c\u5f88\u53ef\u80fd rs \u8fd4\u56de\u7684\u4e0d\u662f 200 \u7684\u9519\u8bef\u624d\u5bfc\u81f4\u7684\u3002
\n\u6293\u5305\uff0c\u4e3a\u6b64\u8e72\u5b88\u4e86\u5f88\u957f\u7684\u65f6\u95f4\u6293\u4f4f\u4e86\u91cd\u73b0\u7684\u673a\u4f1a:
\n\"\"
\n\u679c\u771f\uff0c\u786e\u5b9e\u662f rs \u8fd4\u56de\u4e86 500 \u7684\u9519\u8bef\u624d\u5bfc\u81f4\u88ab remove \u7684\u3002\u4e4b\u524d\u867d\u7136 5xx, 4xx \u4f1a\u589e\u5927\uff0c\u4f46\u662f\u51e0\u4e4e\u5e76\u4e0d\u5f71\u54cd 200 \u7684\u6570\u91cf\uff0c\u8fd9\u6b21\u5374\u4e0d\u662f\u8fd9\u6837\u7684\u60c5\u51b5\uff0c500 \u7684\u589e\u591a\uff0c200 \u7684\u5374\u5f02\u5e38\u4e0b\u8dcc\u3002\u5168\u91cf\u5206\u6790 err log\uff0c\u60ca\u4eba\u7684\u53d1\u73b0\uff0c\u8fd9\u6bb5\u65f6\u95f4\u5185\u7684\u9519\u8bef\u6761\u76ee\u662f\u5e73\u65f6\u7684 100 \u500d\uff0c\u5e76\u4e14\uff0c\u51fa\u73b0\u5947\u602a\u7684\u51fa\u73b0\u4e86\u4e0b\u9762\u7684\u9519\u8bef:
\n2014\/09\/06 20:09:55 [alert] 3164#0: *4082964565 socket() failed (24: Too many open files) while connecting to upstream, client: 122.93.211.105, server: foo.example.com, request: “POST \/fk HTTP\/1.1”, upstream: “http:\/\/192.168.90.53:8888\/fk”, host: “foo.example.com”<\/p>\n

\u4e00\u67e5 \/proc \u4e0b\u9762\u7684 limits\uff0cNgx \u7684\u7adf\u7136\u53d8\u6210\u4e86 1024:
\n\"\"
\n\u770b\u5230\u00a01024<\/a>\u00a0\u7684\u90a3\u4e00\u5239\u90a3\u7a81\u7136\u60f3\u8d77\u4e86\u6211\u4eec\u4e4b\u524d\u67d0\u4e2a\u4ea7\u54c1\u7ebf\u540c\u6837\u7684\u51fa\u73b0\u8fc7\u4e00\u6b21\u8fd9\u4e2a\u6587\u6863\uff0c\u5f53\u65f6\u5c1d\u8bd5\u4e86\u5404\u79cd\u529e\u6cd5\u5305\u62ec\u76f4\u63a5\u4fee\u6539 limits \u6587\u4ef6\u4e5f\u65e0\u6cd5\u63d0\u9ad8 open file\uff0c\u540e\u6765\u76f4\u63a5 reboot \u673a\u5668\u4e86(\u6709\u81ea\u52a8\u7684 failover \u7b56\u7565)\uff0c\u6062\u590d\uff0c\u8fd9\u4e8b\u540e\u6765\u5c31\u88ab\u6162\u6162\u6de1\u5fd8\u4e86\uff0c\u4f46\u662f\u771f\u76f8\u4f9d\u7136\u4e0d\u6e05\u695a\u3002\u7ed3\u679c\uff0c\u8fd9\u6b21\u58a8\u83f2\u53c8\u627e\u4e0a\u95e8\u6765\u4e86\u3002\u540e\u6765\u6211\u4eec\u53d1\u73b0\u8fd8\u662f\u6709\u4e9b\u7528\u6237(1<\/a>,\u00a02<\/a>)\u00a0 \u51fa\u73b0\u4e86\u8ddf\u6211\u4eec\u7c7b\u4f3c\u7684\u60c5\u51b5\uff0c\u4f46\u662f\u4f9d\u7136\u4e0d\u6e05\u695a\u539f\u56e0\u3002
\n\u4e3a\u4e86\u786e\u8ba4\u5c31\u662f open file \u9020\u6210\u4e86\uff0c\u5bf9\u6bd4\u4e00\u4e0b 5xx(too many open file) \u8ddf\u975e 200 \u9519\u8bef\u7684\u6bd4\u4f8b:
\n\"\"
\n\u5b8c\u5168\u7b26\u5408\u3002
\n\u771f\u6b63\u7684\u539f\u56e0\u6211\u4e5f\u6ca1\u6cd5\u8bf4\u6e05\u695a\uff0c\u57fa\u672c\u53ef\u4ee5\u80af\u5b9a\u7684\u662f\u5728 Nginx \u8fd0\u884c\u8fc7\u7a0b\u4e2d open file \u88ab\u6539\u6210\u4e86 1024\u3002\u4e0d\u8fc7\u73b0\u5728\u5e94\u8be5\u53ef\u4ee5\u5b8c\u5168\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u4e86\uff0c\u9664\u4e86\u901a\u8fc7 worker_rlimit_nofile \u6307\u5b9a\u4e4b\u5916\uff0c\u6211\u4eec\u628a\u8fd9\u4e9b\u8fdb\u7a0b\u7684 limits \u6587\u4ef6\u5168\u90e8\u76d1\u63a7\u8d77\u6765\uff0c\u5305\u62ec fd \u7684\u6570\u91cf\uff0c\u8fd9\u6837\u5373\u4f7f\u518d\u6b21\u300c\u8be1\u5f02\u300d\u7684\u53d8\u6210\u4e86 1024\uff0c\u6211\u4eec\u4e5f\u80fd\u53ca\u65f6\u7684\u53d1\u73b0\u91c7\u53d6\u63aa\u65bd\u3002<\/p>\n

kernel panic \u7684\u4e00\u4e9b\u95ee\u9898<\/p>\n

\u673a\u5668\u7a33\u5b9a\u7684\u8fd0\u884c\u4e86\u51e0\u5929\u4e4b\u540e\uff0c\u67d0\u5929\u65e9\u4e0a master \u7a81\u7136 kernel panic \u4e86\u3002
\n\u80fd\u5f97\u5230\u7684\u4fe1\u606f\u975e\u5e38\u5c11\uff0c\u63a5\u4e0b\u6765\u7ee7\u7eed\u6316\u575f\u4f3c\u7684\u5206\u6790 messages log\u30025min \u6253\u51fa\u7684\u51e0\u767e\u6761 log \u4e00\u6761\u4e00\u6761\u7684\u5bf9\u7740 timestamp \u5206\u6790\uff0c\u4ece log \u770b\uff0cslave \u662f\u6210\u529f\u5207\u6362\u4e86\uff0c\u5728 master \u8d77\u6765\u4e4b\u540e\uff0c\u6d41\u91cf\u53c8\u9010\u6e10\u7684\u6062\u590d\u5230\u4e86 master \u4e0a\uff0c\u4f46\u662f\u81f3\u6b64\u4e4b\u540e\uff0crs \u4e0a\u7684\u6d41\u91cf\u7531\u4e8e master \u51fa\u73b0\u4e86\u95ee\u9898\u3002\u5f00\u59cb master \u770b\u4e0a\u53bb\u50cf\u662f work \u7684\uff0cinacctive conn \u5f00\u59cb\u6062\u590d\uff0c\u4f46\u662f active conn \u4e00\u76f4\u5230 5min \u4e4b\u540e\u624d\u5f00\u59cb\u6062\u590d\uff0c\u8fd9\u671f\u95f4\u53d1\u751f\u4e86\u4ec0\u4e48\uff0clvs \u7684 log \u5e76\u6ca1\u6709\u5f88\u8be6\u7ec6\u7684\u8bf4\u660e\uff0c\u770b\u4e0a\u53bb\u50cf\u662f\u4e24\u53f0 lvs \u90fd\u6ca1\u6709\u5de5\u4f5c\uff0cslave \u53d8\u6210\u4e86 backup \u81ea\u7136\u4e0d\u518d\u5de5\u4f5c\uff0c\u6302\u6389\u7684\u90a3\u53f0 master \u867d\u7136\u8d77\u6765\u4e4b\u540e\u8fdb\u5165\u4e86 master \u5e76\u4e14\u4e5f enable \u4e86\u4e24\u53f0 rs\uff0c\u4f46\u662f\u6b63\u5e38\u7684\u6d41\u91cf\u5374\u6ca1\u6709\u8fc7\u6765\u3002
\n\u51fa\u73b0\u4e0a\u9762\u8fd9\u79cd\u60c5\u51b5\u7684\u53ef\u80fd\u539f\u56e0\u662f\u4ec0\u4e48\uff1fkeepalived \u7684\u914d\u7f6e\u51fa\u73b0\u95ee\u9898\u4e86\uff0c\u679c\u771f\uff0c\u6ca1\u6709\u6307\u660e priority\u3002\u8fd9\u4e2a\u95ee\u9898\u590d\u73b0\u8fd8\u7b97\u6bd4\u8f83\u5bb9\u6613\uff0c\u76f4\u63a5\u628a master \u7684\u641e kernel panic \u5c31\u53ef\u4ee5\u51fa\u73b0\u8ddf\u751f\u4ea7\u73af\u5883\u4e00\u6837\u7684\u73b0\u8c61\uff0c\u4e25\u683c\u6307\u5b9a priority \u4e4b\u540e\u5219\u4e0d\u4f1a\u51fa\u73b0\u8fd9\u4e48\u957f\u65f6\u95f4\u5185\u65e0\u4eba\u63a5\u6536\u8bf7\u6c42\u7684\u60c5\u51b5\u3002
\n\u62ff\u6765\u4e3b\u4e49\u662f\u975e\u5e38\u53ef\u6015\u7684\uff0c\u5f53\u65f6\u6211\u6ca1\u6709 review \u4e0b keepalived \u7684\u914d\u7f6e\u5c31\u76f4\u63a5\u5f00\u8dd1\u4e86\uff0c\u6838\u5fc3\u670d\u52a1\u8fd8\u662f\u8981\u4eb2\u81ea\u9a8c\u8bc1\u3002
\n\u9664\u4e86\u4e0a\u9762\u8fd9\u4e2a\u6559\u8bad\u4e4b\u5916\uff0c\u65e2\u7136\u662f HA\uff0c\u4e00\u5b9a\u8981\u81ea\u5df1\u505a\u4e00\u4e9b\u7834\u574f\u6027\u5b9e\u9a8c\uff0c\u9a8c\u8bc1\u5404\u79cd\u53ef\u80fd\u7684\u60c5\u51b5\u3002\u771f\u6b63\u4e0a\u7ebf\u4e4b\u524d\u4e0d\u9a8c\u8bc1\uff0c\u53ca\u65f6\u53d1\u73b0\u95ee\u9898\uff0c\u771f\u7684\u5168\u91cf\u4e0a\u4e86\uff0c\u5230\u65f6\u5019\u51fa\u73b0\u95ee\u9898\u7684\u5f71\u54cd\u66f4\u5927\u3002\u6211\u4eec\u867d\u7136\u5728\u5c0f\u6d41\u91cf\u5207\u6362\u65f6\uff0c\u4e5f\u505a\u4e86\u4e00\u4e9b\u7834\u574f\u6027\u5b9e\u9a8c\u9a8c\u8bc1 HA\uff0c\u4f46\u662f\u5e76\u6ca1\u6709\u7f1c\u5bc6\u7684\u628a\u6240\u6709\u60c5\u51b5\u90fd\u5217\u7a77\u4e3e\u51fa\u6765\u3002<\/p>\n

\u4e0a\u9762\u4ec5\u4ec5\u89e3\u51b3\u4e86 keepalived \u7684\u4e00\u4e2a\u95ee\u9898\uff0ckernel panic \u4f3c\u4e4e\u6ca1\u6709\u5f15\u8d77\u6211\u4eec\u7684\u6ce8\u610f\uff0c\u4e4b\u540e\u51e0\u5929\u63a5\u8fde\u7684\u51fa\u73b0 kernel panic\uff0c\u6211\u4eec\u624d\u610f\u8bc6\u5230\uff0c\u8fd9\u662f\u4e2a\u975e\u5e38\u4e25\u91cd\u7684\u95ee\u9898\uff0c\u867d\u7136\u6bcf\u6b21 kernel panic \u90fd\u5b8c\u5168\u7684\u5207\u6362\u6210\u529f\u4e86\u3002\u60f3\u5230\u73b0\u5728 lvs \u4f7f\u7528\u7684 kernel \u8ddf\u5b98\u65b9\u552f\u4e00\u4e0d\u4e00\u6837\u7684\u5730\u65b9\u5c31\u662f\u6211\u81ea\u5df1\u91cd\u65b0\u7f16\u8bd1\u4e86 kernel\uff0c\u8c03\u5927\u4e86 IP_VS_TAB_BITS\u3002\u65e2\u7136\u8fd9\u4e48\u4e00\u4e2a\u5c0f\u7684\u6539\u52a8\u90fd\u4f1a\u5f15\u53d1 kernel panic\uff0c\u90a3\u7d22\u6027\u8fd8\u662f\u5148\u5207\u56de\u5b98\u65b9\u7684\u7248\u672c\uff0c\u6bd5\u7adf\u6211\u4eec\u73b0\u5728\u7ebf\u4e0a 90% \u7684\u673a\u5668\u90fd\u5df2\u7ecf\u6210\u529f\u7684\u8dd1\u4e86\u5f88\u957f\u65f6\u95f4\u4e86\u3002\u6ca1\u60f3\u5230\u7684\u662f\uff0c\u5373\u4f7f\u4f7f\u7528\u4e86\u5b98\u65b9\u7684\u7248\u672c\uff0c\u4f9d\u7136\u4e0d\u505c\u7684 panic\uff0c\u540e\u6765\u53d1\u73b0\u662f\u5176\u5b9e\u662f\u4e2a\u00a0bug<\/a>\uff0c\u5728\u7ed9 ipvs \u7684\u8fde\u63a5\u505a hash&unhashing \u7684\u65f6\u5019\u7f3a\u5c11\u5bf9\u88ab\u4fee\u6539\u8fde\u63a5\u7684\u9501\uff0c\u5bfc\u81f4\u5185\u5b58\u5954\u6e83\u3002\u7406\u8bba\u4e0a\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9\u76ee\u524d\u7684 src \u6253 patch\uff0c\u4f46\u662f\u5b9e\u9645\u7684\u6548\u679c\u4e0d\u5f97\u800c\u77e5\uff0c\u52a0\u4e0a\u6ca1\u6709\u4e4b\u524d\u7684\u6210\u529f\u6848\u4f8b\u4ee5\u53ca\u56e2\u961f\u7f3a\u5c11\u7cbe\u901a\u5185\u6838\u7684\u4eba\uff0c\u4e0d\u5f97\u653e\u5f03\u8fd9\u4e2a\u60f3\u6cd5\u3002\u540e\u6765\u60f3\u5230\u4e86\u6211\u4eec\u5144\u5f1f\u56e2\u961f\uff0c\u5728\u591a\u65b9\u6c42\u52a9\u4e4b\u540e\uff0c\u7ec8\u4e8e\u7528\u4e0a\u4e86\u9ad8\u5927\u4e0a\u7684\u96c6\u56e2\u5185\u6838\uff0c\u81f3\u6b64\u5185\u6838\u8fd0\u884c\u7684\u5f88\u7a33\u5b9a\u3002<\/p>\n

4xx \u95ee\u9898\u7684\u6700\u7ec8\u8c03\u67e5
\n\u8fd8\u8bb0\u5f97\u6700\u4e0a\u9762\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684 4xx \u98d9\u5347\u95ee\u9898\u5427\uff0c\u4ece\u67d0\u65e5\u8d77\uff0c4xx \u7684\u9519\u8bef\u53c8\u660e\u663e\u7684\u589e\u5927\uff0c\u901a\u8fc7\u5bf9\u5386\u53f2\u6570\u636e\u7684\u5206\u6790\u53d1\u73b0\u589e\u591a\u7684 4xx \u9519\u8bef\u4e3b\u8981\u96c6\u4e2d\u5728 499\uff0c\u968f\u7740\u9ad8\u5cf0\u7684\u6765\u4e34(\u767d\u5929\u5de5\u4f5c\u65f6\u95f4\u81f3\u51cc\u6668)\uff0c499 \u7684\u9519\u8bef\u4e5f\u663e\u8457\u6027\u7684\u589e\u52a0:
\n\"\"
\n\u518d\u6b21\u56de\u987e\u4e0b 499, 408 \u7684\u95ee\u9898\u3002
\n499 \u5b9e\u9645\u4e0a\u662f\u5ba2\u6237\u7aef\u5148\u5173\u8fde\u63a5\u7684\uff0c\u539f\u56e0\u5f88\u591a(\u65e0\u6cd5\u786e\u5b9a\uff0c\u5ba2\u6237\u7aef\u5f15\u8d77)\uff0c\u6bd4\u5982\uff1a
\n1. \u5237\u9875\u9762\u7684\u65f6\u5019\u8fde\u6309\u4e86 2 \u6b21 F5\uff0c\u5c31\u4f1a\u5bfc\u81f4\u4e4b\u524d\u9875\u9762\u4e0a\u7684\u8bf7\u6c42\u6ca1\u6709\u6536\u5230\u5b8c\u7684\u5c31 499
\n2. \u7f51\u7edc\u592a\u6162
\n3. ngx \u521a\u8f6c\u53d1\u8bf7\u6c42\u5f80\u540e\u7aef\uff0c\u540e\u7aef\u8fd8\u6ca1\u6765\u5f97\u53ca\u5e94\u7b54\uff0c\u524d\u7aef\u5c31\u4e3b\u52a8\u5173\u8fde\u63a5\u4e86<\/p>\n

408 \u95ee\u9898\u7684\u89e3\u91ca\uff1a
\n1. 408 \u662f\u5ba2\u6237\u7aef\u8fde\u5b8c\u6574\u7684\u8bf7\u6c42\u4e5f\u6ca1\u6709\u4f20\u5b8c\uff0c\u4ece access log \u91cc\u9762\u6ca1\u6bcf\u53d1\u73b0 ua\uff0c\u6b63\u5e38\u7684\u4e0a\u4f20\u5e94\u8be5\u662f\u6709 ua \u7684\uff0c\u6240\u4ee5\u8fd9\u4e2a\u95ee\u9898\u5f88\u53ef\u80fd\u662f\u7531\u4e8e\u7f51\u7edc\u95ee\u9898\u9020\u6210\u7684
\n2. 408 \u7684\u590d\u73b0\u4e5f\u6bd4\u8f83\u7b80\u5355\uff0c\u53d1\u9001 POST \/app_log HTTP\/1.1 \u7ed9 ngx\uff0c\u4e0d\u53d1\u6570\u636e\uff0c\u8fc7 60s \u5c31\u4f1a\u8fd4\u56de 408 \u7684\u9519\u8bef<\/p>\n

\u9664\u4e86 4xx \u9519\u8bef\u7684\u98d9\u5347\u4e4b\u5916\uff0cupstream java \u7684 fd \u4e5f\u4f1a\u968f\u4e4b\u98d9\u5347\uff0c\u4ece\u4e0a\u9762\u7684\u4e00\u4e9b\u6570\u636e\u81f3\u5c11\u53ef\u4ee5\u5f97\u5230\u4e0b\u9762\u7684\u4e00\u4e9b\u7ed3\u8bba\uff1a
\n1. \u672c\u8eab\u79fb\u52a8\u7f51\u7edc\u7684\u8d28\u91cf\u76f8\u6bd4\u4f1a\u6bd4\u8f83\u5dee\uff0c\u518d\u52a0\u4e0a\u521a\u5207\u6362\u5b8c\u53cc\u7ebf\uff0c\u6709\u4e00\u5b9a 4xx \u7684\u589e\u52a0\u8fd8\u662f\u53ef\u4ee5\u7406\u89e3\u7684
\n2. \u6b63\u5e38\u7684\u5e94\u7528\uff0c\u6bd4\u8f83\u7a33\u5b9a\u7684 4xx \u5e94\u8be5\u662f\u6bd4\u8f83\u6b63\u5e38\u7684
\n3. \u4f46\u662f\uff0c\u6211\u4eec\u7684\u60c5\u51b5\u662f\u8fde\u7eed\u6570\u5929\u7684 4xx \u9891\u7e41\u4e0d\u7a33\u5b9a\uff0c\u6240\u4ee5\uff0c\u53ef\u4ee5\u786e\u5b9a\u6709\u95ee\u9898<\/p>\n

\u60f3\u5230\u8fd9\u6bb5\u671f\u95f4\u552f\u4e00\u7684\u64cd\u4f5c\u5c31\u662f\u5207\u6362\u4e86\u6d41\u91cf\uff0c\u4e8e\u662f\uff0c\u76f4\u63a5\u56de\u6eda\uff0c\u5168\u90e8\u5207\u6362\u5230\u5168\u7ebf BGP\uff0c\u89c2\u5bdf\u4e86\u4e00\u5929\u6ca1\u6709\u4efb\u4f55\u6548\u679c\u3002\u5728\u8ddf\u5f00\u53d1\u786e\u8ba4\u4e00\u4e9b\u7ec6\u8282\u7684\u65f6\u5019\u53d1\u73b0\uff0c\u539f\u6765\u5728 4xx \u98d9\u5347\u7684\u524d\u4e00\u5929\uff0c\u66f4\u65b0\u8fc7\u4e00\u6b21\u4ee3\u7801\uff0c\u65e2\u7136\u5207\u56de\u5168\u7ebf\u6ca1\u6548\u679c\uff0c\u90a3\u7ee7\u7eed\u56de\u6eda\u4ee3\u7801\u5427\uff0c\u7ed3\u679c\u5927\u8dcc\u773c\u955c\u7684\u662f\u95ee\u9898\u4f9d\u7136\u5b58\u5728\u3002<\/p>\n

\u7ed3\u5408 upstream \u53d1\u73b0\uff0c\u6709\u5927\u91cf\u7684 CLOSE_WAIT\u00a0 \u72b6\u6001\uff0c\u5e76\u4e14 recv-Q \u5747\u4e3a\u975e 0\uff1a
\n# cat status
\nestablished
\nsyn-sent
\nsyn-recv
\nfin-wait-1
\nfin-wait-2
\ntime-wait
\nclosed
\nclose-wait
\nlast-ack
\nclosing
\n# for i in $(cat status);\u00a0 do echo -n\u00a0 “$i: ” && ss -o state $i src INTERNAL_IP | wc -l; done
\n# ss src INTERNAL_IP:PORT\u00a0 | head<\/p>\n

\"\"
\n\u4e0a\u9762\u7684\u975e 0 \u5b57\u6bb5\u8868\u660e\uff0cupstream \u6ca1\u80fd\u6210\u529f\u7684\u63a5\u53d7\u53d1\u8fc7\u6765\u7684\u8bf7\u6c42\u5c06\u5176\u653e\u5230\u7f51\u5361\u7684 buffer \u91cc\u9762\uff0c\u5bfc\u81f4\u5176 queue \u4e00\u76f4\u4fdd\u6301\u5728\u975e 0 \u72b6\u6001\u3002
\n\u95ee\u9898\u5206\u6790\u5230\u8fd9\u91cc\uff0c\u57fa\u672c\u53ef\u4ee5\u786e\u5b9a\u662f\u7528\u6237\u6001\u7684\u5e94\u7528\u6ca1\u6cd5\u6b63\u786e\u7684\u63a5\u6536\u8bf7\u6c42\u624d\u5bfc\u81f4\u6b64\u7c7b\u7ed3\u679c\uff0c\u518d\u7ed3\u5408\u4e0a\u9762 return code \u7684\u5206\u6790\u4ee5\u53ca upstream \u7684\u5206\u6790\uff1a
\n1. \u5207\u6362\u5b8c\u53cc\u7ebf\u4e4b\u540e\uff0c\u7531\u4e8e\u672c\u8eab\u7f51\u7edc\u8d28\u91cf\u4f1a\u6709\u4e00\u5b9a\u7684\u4e0b\u964d\uff0c\u6240\u6709 4xx \u7684\u4f1a\u589e\u591a\uff0c\u8fd9\u4e2a\u662f\u53ef\u4ee5\u5bb9\u5fcd\u7684
\n2. upstream \u4ee3\u7801\u5c42\u9762\u5e94\u8be5\u8fd8\u5b58\u5728\u4e00\u4e9b\u95ee\u9898\uff0c\u7ed3\u5408 fd \u7684\u76d1\u63a7\uff0c\u7f51\u4e0a\u9ad8\u5cf0 fd \u53ef\u80fd\u4f1a\u98d9\u5347\u5230 100+K\uff0c\u662f\u4e0d\u662f\u6709\u53ef\u80fd fd \u6ca1\u6709\u53ca\u65f6\u7684\u56de\u6536\uff1f(fd \u6cc4\u6f0f\u6709\u6ca1\u6709\u8fd9\u79cd\u53ef\u80fd)
\n3. \u51fa\u95ee\u9898\u524d\u4e00\u5929\u66f4\u65b0\u8fc7\u4e00\u6b21\u4ee3\u7801\uff0c\u5728\u5176\u4ed6\u6ca1\u6709\u53d8\u5316\u7684\u60c5\u51b5\u4e0b\uff0c\u4ece\u524d\u7aef\u5230\u540e\u7aef\u7684\u76d1\u63a7\u90fd\u6709\u4e0d\u540c\u7a0b\u5ea6\u7684\u5f02\u5e38\uff0c\u662f\u4e0d\u662f\u4e0a\u7ebf\u7684\u6709\u95ee\u9898<\/p>\n

\u4e0a\u9762\u63d0\u5230\u7684 fd \u98d9\u5347\u95ee\u9898\uff0c\u65e2\u7136\u98d9\u5347\uff0c\u90a3\u5c31\u5728\u51fa\u95ee\u9898\u7684\u65f6\u5019\u4e0a\u53bb\u770b\u770b\u662f\u54ea\u4e9b fd \u98d9\u5347\uff0c\u9996\u5148\u9700\u8981\u786e\u8ba4\u662f\u786e\u5b9e\u662f java \u7684\u8fdb\u7a0b\u5bfc\u81f4:
\nfor x in `ps -eF| awk ‘{ print $2 }’`;do echo `ls \/proc\/$x\/fd 2> \/dev\/null | wc -l` $x `cat \/proc\/$x\/cmdline 2> \/dev\/null`;done | sort -n -r | head -n 20<\/p>\n

\u5728\u67d0\u5929\u51fa\u95ee\u9898\u7684\u4e2d\u5348 12 \u70b9\uff0c\u6211\u767b\u5f55\u5230\u51fa\u95ee\u9898\u7684\u673a\u5668\u4e0a\u7edf\u8ba1\u4e86 fd \u7684\u60c5\u51b5:
\n\u51fa\u95ee\u9898\u7684\u65f6\u95f4\u6bb5 fd \u5728 ~40k\uff0c\u5206\u89e3\u4e0b\u6765\u5305\u542b
\n* tcp estab\uff1a ~1.7k\uff0c\u8ddf\u6b63\u5e38\u7684\u6bd4\u6ca1\u53d8\u5316
\n* tcp close-wait: ~9k\uff0c\u8fd9\u4e24\u8005\u5927\u6982 10k
\n* \u5269\u4f59\u7684 30k \u901a\u8fc7 lsof \u89c2\u5bdf\u5168\u90e8\u662f can’t identify protocol \u7684\u72b6\u6001<\/p>\n

\u800c\u6b63\u5e38\u60c5\u51b5\u662f\uff1a
\n* tcp estab: ~1.5k
\n* tcp close-wait: ~2k
\n* \u5269\u4f59\u7684\u4e00\u4e9b\u662f can’t xxx<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\u51fa\u95ee\u9898\u9636\u6bb5\uff0cclose-wait & can’t identiy protocol \u98d9\u5347\u4e86\u539f\u6765\u7684\u6570\u500d:
\n1. close-wait \u7684\u5f88\u597d\u7406\u89e3\uff0c\u8ddf\u4e4b\u524d\u7684\u89c2\u70b9\u4e00\u6837\uff0ctcp \u4e00\u76f4\u5728\u7b49\u5f85 user space \u8c03\u7528 close()\uff0c\u5426\u5219\u4f1a\u4e00\u76f4\u5904\u4e8e close-wait \u72b6\u6001
\n2. can’t xxx \u7684\u6682\u65f6\u6ca1\u6cd5\u89e3\u91ca\uff0c\u7b49\u5230\u4e0b\u4e00\u6b21\u51fa\u95ee\u9898\u7684\u65f6\u5019\u518d\u89c2\u5bdf<\/p>\n

\u6709\u8fd9\u4e48\u591a\u7684 close wait\uff0c\u5f88\u5bb9\u6613\u8ba9\u4eba\u8054\u60f3\u5230\u662f fd \u6cc4\u6f0f\uff0c\u60f3\u5173\u95ed\u7684\u4e00\u65b9\u53d1\u9001 tcp fin\uff0c\u670d\u52a1\u7aef\u6536\u5230\u4e4b\u540e\uff0c\u5982\u679c\u7a0b\u5e8f\u903b\u8f91\u6709\u95ee\u9898\uff0c\u5fd8\u8bb0\u8c03\u7528 close(socketfd)\uff0c\u5219\u4f1a\u9020\u6210 fd \u6cc4\u6f0f\uff0c\u8868\u8c61\u5c31\u662f\u6709\u5927\u91cf\u7684 close wait \u72b6\u6001\u3002\u4e0d\u8fc7\u4ece\u76d1\u63a7\u6765\u770b\uff0c\u8fd9\u90e8\u5206\u7684\u98d9\u5347\u7684 fd \u5f88\u5feb\u5c31\u4f1a\u76f4\u7ebf\u4e0b\u964d\u5230\u6b63\u5e38\u503c(\u540e\u6765\u5206\u6790 jvm \u7684\u65f6\u5019\u53d1\u73b0\u5176\u5b9e\u662f mgc, fgc \u5bfc\u81f4\u7684 fd \u56de\u6536):<\/p>\n

\"\"<\/p>\n

\u95ee\u9898\u5206\u6790\u5230\u8fd9\u91cc\uff0c\u90a3\u5c31\u7ee7\u7eed\u6df1\u5165\u4e0b\u53bb\uff0c\u4ece JVM \u5c42\u9762\u770b\u770b\u6709\u6ca1\u6709\u95ee\u9898\u3002
\n\u9996\u5148\u770b\u770b java \u7684\u8fdb\u7a0b\uff0c\u4e0d\u7ba1\u662f\u6b63\u5e38\u72b6\u6001\u8fd8\u662f\u5f02\u5e38\u72b6\u6001\uff0c\u67d0\u51e0\u4e2a thread \u90fd\u6d88\u8017\u4e86\u5927\u91cf\u7684 cpu \u4ee5\u53ca fd\uff0c\u4e5f\u5c31\u662f\u8bf4\u76ee\u524d\u7684 thread \u662f\u975e\u5e38\u4e0d\u5747\u5300\u7684\uff0c\u67d0\u4e00\u4e2a thread \u80fd\u6d88\u8017 50% \u4ee5\u4e0a\u7684 fd\uff1a
\n\"\"<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u641e\u4e2a\u811a\u672c\u770b\u770b\u6700\u8017\u8d44\u6e90\u7684\u90a3\u4e2a thread dump \u662f\u4ec0\u4e48\u6837\u7684\uff0c\u6709\u4e86\u8fd9\u4e2a\u5c31\u53ef\u4ee5\u5f88\u5bb9\u6613\u7684\u770b\u5230\u67d0\u4e9b\u65b9\u6cd5\u7684\u5f02\u5e38\u4e86\u3002\u8fd9\u6211\u5728\u524d\u4e00\u7bc7<\/a>\u535a\u5ba2\u5df2\u7ecf\u603b\u7ed3\u8fc7\uff0c\u8fd9\u91cc\u5047\u8bbe\u6211\u4eec\u5df2\u7ecf\u5f97\u5230\u4e86 TID\uff0c\u5148\u8f6c\u6362\u6210 hex \u7136\u540e for \u5faa\u73af\u5c31\u80fd\u627e\u5230\u771f\u76f8\u4e86\u3002
\nfor i in {1..100}; do echo “\u2014$(date +’%H:%M:%S’)\u2014” >> tiddump.log; LAB=$(date ‘+%s’); HEX=`echo “obase=16; $TID” |bc`; jstack {PID} >> .\/jstack$LAB; grep -iA 20\u00a0 $HEX\u00a0 .\/jstack$LAB \u2013color >> tiddump.log; sleep5; done<\/p>\n

\u5230\u4e86\u8fd9\u4e00\u6b65\uff0c\u771f\u76f8\u5927\u767d\u4e86\uff0c\u4ece log \u91cc\u9762\u53d1\u73b0\u67d0\u4e9b\u65b9\u6cd5\u8c03\u7528\u5e38\u5e74\u7684 hang \u5728\u90a3\u513f\uff0c\u6e90\u4e8e\u7cfb\u7edf\u5728\u5904\u7406\u67d0\u4e2a\u5927 List\uff0c\u5ba2\u6237\u7aef\u7684 SDK \u5c42\u9762\u903b\u8f91\u5224\u65ad\u6709\u95ee\u9898\uff0c\u4e0d\u505a\u68c0\u67e5\u7684\u628a\u4e00\u4e9b\u5de8\u578b\u5b57\u6bb5\u7ecf\u8fc7\u538b\u7f29\u90fd\u53d1\u5230\u524d\u7aef\u8fd9\u8fb9\u6765\uff0c\u7ed3\u679c\u5230\u4e86\u540e\u7aef\u89e3\u538b\u7f29\u5904\u7406\u7684\u65f6\u5019\u53d1\u73b0\u5904\u7406\u4e0d\u4e86\u3002<\/p>\n

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\n\u6700\u521d\u6211\u4eec\u6000\u7591\u662f\u670d\u52a1\u5728\u5173\u95ed\u8fde\u63a5\u7684\u5904\u7406\u903b\u8f91\u4e0a\u6709\u95ee\u9898\uff0c\u540e\u6765\u53d1\u73b0\u6211\u4eec\u7684\u4ee3\u7801\u91cc\u9762\u5e76\u4e0d\u6d89\u53ca\u8fd9\u65b9\u9762\u7684\u903b\u8f91\u5904\u7406\uff0c\u8fde\u63a5\u7684\u5efa\u7acb\u5173\u95ed\u5168\u90e8\u7531 Finagle \u6846\u67b6\u81ea\u5df1\u5904\u7406\u4e86\uff0c\u6240\u4ee5\u4e00\u4e2a\u91cd\u8981\u7684\u7591\u70b9\u662f\u6211\u4eec\u4f7f\u7528\u7684\u8be5\u6846\u67b6\u7684\u7248\u672c\u662f\u5426\u5b58\u5728\u8fde\u63a5\u65b9\u9762\u7684 bug\uff0c\u67e5\u4e00\u4e0b\u4ed6\u7684\u4e0b\u4e00\u4e2a\u4ee5\u53ca\u4e0b\u51e0\u4e2a\u7248\u672c\u7684 release log \u5f88\u5feb\u5c31\u80fd\u786e\u8ba4\u3002<\/p>\n

\u4ee5\u4e0a\u5206\u6790\u7684\u8fd9\u4e9b\u6848\u4f8b\uff0c\u867d\u7136\u5f71\u54cd\u6ca1\u6709\u5927\u5230\u4f1a\u8ba9\u4e1a\u52a1\u906d\u53d7\u4e25\u91cd\u7684\u635f\u5931\uff0c\u4f46\u662f\u4e0d\u5938\u5f20\u7684\u8bf4\uff0c\u6bcf\u4e00\u4e2a\u90fd\u662f\u4e00\u4e2a\u91cd\u91cf\u7ea7\u7684\u5b9a\u65f6\u70b8\u5f39\uff0c\u4e0d\u53ca\u65f6\u6392\u9664\uff0c\u6307\u4e0d\u5b9a\u54ea\u5929\u5168\u7ebf\u5c31\u90fd\u6302\u4e86\u3002\u8fd9\u4e9b\u4e8b\u4ef6\uff0c\u53ef\u80fd\u7edd\u5927\u591a\u6570\u7684\u516c\u53f8\u90fd\u4e0d\u4f1a\u9047\u5230\uff0c\u4f46\u662f\u601d\u8003\u95ee\u9898\u7684\u601d\u8def\u65b9\u5411\u6bd4\u8fd9\u4e9b\u6848\u4f8b\u91cd\u8981\u7684\u591a\uff0c\u62ff\u8fd9\u6b21\u6765\u8bf4\uff0c\u5176\u5b9e\u601d\u8def\u5728\u4e00\u5f00\u59cb\u5c31\u8dd1\u504f\u4e86\uff0c\u5728\u786e\u8ba4\u524d\u7aef\u6ca1\u6709\u95ee\u9898\u7684\u60c5\u51b5\u4e0b\u8fd8\u5728\u82b1\u4e86\u5927\u91cf\u7684\u65f6\u95f4\u800c\u4e0d\u662f\u4e00\u5f00\u59cb\u5c31\u4ece upstream \u4e0b\u624b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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\u524d\u540e\u5927\u6982\u6709\u4e00\u5468\u7684\u89c2\u5bdf\u65f6\u95f4\uff0c\u6574\u4f53\u8fd8\u662f\u5f88\u7a33\u5b9a\u7684\uff0c\u5f53\u7136\u4e5f\u9047\u5230\u4e86\u4e00\u4e9b\u5c0f\u95ee\u9898\uff0c\u6bd4\u5982 10G \u7f51\u5361\u4e0d\u89c4\u5219\u7684\u51fa\u73b0\u4e86\u4e00\u4e9b rx_crc_errors\/rx_missed_errors\uff0c\u901a\u8fc7\u4f18\u5316\u4e00\u4e9b\u786c\u4ef6\u8bbe\u5907\u57fa\u672c\u5f97\u5230\u4e86\u89e3\u51b3\uff0c\u867d\u7136\u540e\u671f\u8fd8\u4f1a\u65f6\u4e0d\u65f6\u7684\u5192\u51fa\u4e00\u4e9b\uff0c\u4f46\u662f\u4ece\u5404\u4e2a\u670d\u52a1\u4ee5\u53ca\u4e1a\u52a1\u7684\u76d1\u63a7\u65b9\u9762\u6ca1\u6709\u770b\u5230\u6f5c\u5728\u7684\u5f71\u54cd\uff0c\u6682\u65f6\u7565\u8fc7\u3002 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[…]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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