{"id":10006358,"date":"2022-08-31T11:10:47","date_gmt":"2022-08-31T03:10:47","guid":{"rendered":"https:\/\/ityet.com\/?p=10006358"},"modified":"2022-08-31T11:10:47","modified_gmt":"2022-08-31T03:10:47","slug":"%e7%86%94%e6%96%ad%e5%8e%9f%e7%90%86%e5%88%86%e6%9e%90%e4%b8%8e%e6%ba%90%e7%a0%81%e8%a7%a3%e8%af%bb","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006358","title":{"rendered":"\u7194\u65ad\u539f\u7406\u5206\u6790\u4e0e\u6e90\u7801\u89e3\u8bfb"},"content":{"rendered":"<p>\u7194\u65ad\u673a\u5236\uff08Circuit Breaker\uff09\u6307\u7684\u662f\u5728\u80a1\u7968\u5e02\u573a\u7684\u4ea4\u6613\u65f6\u95f4\u4e2d\uff0c\u5f53\u4ef7\u683c\u7684\u6ce2\u52a8\u5e45\u5ea6\u8fbe\u5230\u67d0\u4e00\u4e2a\u9650\u5b9a\u7684\u76ee\u6807\uff08\u7194\u65ad\u70b9\uff09\u65f6\uff0c\u5bf9\u5176\u6682\u505c\u4ea4\u6613\u4e00\u6bb5\u65f6\u95f4\u7684\u673a\u5236\u3002\u6b64\u673a\u5236\u5982\u540c\u4fdd\u9669\u4e1d\u5728\u7535\u6d41\u8fc7\u5927\u65f6\u5019\u7194\u65ad\uff0c\u6545\u800c\u5f97\u540d\u3002\u7194\u65ad\u673a\u5236\u63a8\u51fa\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u9632\u8303\u7cfb\u7edf\u6027\u98ce\u9669\uff0c\u7ed9\u5e02\u573a\u66f4\u591a\u7684\u51b7\u9759\u65f6\u95f4\uff0c\u907f\u514d\u6050\u614c\u60c5\u7eea\u8513\u5ef6\u5bfc\u81f4\u6574\u4e2a\u5e02\u573a\u6ce2\u52a8\uff0c\u4ece\u800c\u9632\u6b62\u5927\u89c4\u6a21\u80a1\u4ef7\u4e0b\u8dcc\u73b0\u8c61\u7684\u53d1\u751f\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042406611\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u540c\u6837\u7684\uff0c\u5728\u9ad8\u5e76\u53d1\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u8bbe\u8ba1\u4e2d\uff0c\u4e5f\u5e94\u8be5\u6709\u7194\u65ad\u7684\u673a\u5236\u3002\u7194\u65ad\u4e00\u822c\u662f\u5728\u5ba2\u6237\u7aef\uff08\u8c03\u7528\u7aef\uff09\u8fdb\u884c\u914d\u7f6e\uff0c\u5f53\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u7aef\u53d1\u8d77\u8bf7\u6c42\u7684\u65f6\u5019\uff0c\u670d\u52a1\u7aef\u7684\u9519\u8bef\u4e0d\u65ad\u5730\u589e\u591a\uff0c\u8fd9\u65f6\u5019\u5c31\u53ef\u80fd\u4f1a\u89e6\u53d1\u7194\u65ad\uff0c\u89e6\u53d1\u7194\u65ad\u540e\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u4e0d\u518d\u53d1\u5f80\u670d\u52a1\u7aef\uff0c\u800c\u662f\u5728\u5ba2\u6237\u7aef\u76f4\u63a5\u62d2\u7edd\u8bf7\u6c42\uff0c\u4ece\u800c\u53ef\u4ee5\u4fdd\u62a4\u670d\u52a1\u7aef\u4e0d\u4f1a\u8fc7\u8f7d\u3002\u8fd9\u91cc\u8bf4\u7684\u670d\u52a1\u7aef\u53ef\u80fd\u662frpc\u670d\u52a1\uff0chttp\u670d\u52a1\uff0c\u4e5f\u53ef\u80fd\u662fmysql\uff0credis\u7b49\u3002\u6ce8\u610f\u7194\u65ad\u662f\u4e00\u79cd\u6709\u635f\u7684\u673a\u5236\uff0c\u5f53\u7194\u65ad\u540e\u53ef\u80fd\u9700\u8981\u4e00\u4e9b\u964d\u7ea7\u7684\u7b56\u7565\u8fdb\u884c\u914d\u5408\u3002<\/p>\n<h3>\u7194\u65ad\u539f\u7406<\/h3>\n<p>\u73b0\u4ee3\u5fae\u670d\u52a1\u67b6\u6784\u57fa\u672c\u90fd\u662f\u5206\u5e03\u5f0f\u7684\uff0c\u6574\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u662f\u7531\u975e\u5e38\u591a\u7684\u5fae\u670d\u52a1\u7ec4\u6210\u3002\u4e0d\u540c\u670d\u52a1\u4e4b\u95f4\u76f8\u4e92\u8c03\u7528\uff0c\u7ec4\u6210\u590d\u6742\u7684\u8c03\u7528\u94fe\u8def\u3002\u5728\u590d\u6742\u7684\u8c03\u7528\u94fe\u8def\u4e2d\u7684\u67d0\u4e00\u4e2a\u670d\u52a1\u5982\u679c\u4e0d\u7a33\u5b9a\uff0c\u5c31\u53ef\u80fd\u4f1a\u5c42\u5c42\u7ea7\u8054\uff0c\u6700\u7ec8\u53ef\u80fd\u5bfc\u81f4\u6574\u4e2a\u94fe\u8def\u5168\u90e8\u6302\u6389\u3002\u56e0\u6b64\u6211\u4eec\u9700\u8981\u5bf9\u4e0d\u7a33\u5b9a\u7684\u670d\u52a1\u4f9d\u8d56\u8fdb\u884c\u7194\u65ad\u964d\u7ea7\uff0c\u6682\u65f6\u5207\u65ad\u4e0d\u7a33\u5b9a\u7684\u670d\u52a1\u8c03\u7528\uff0c\u907f\u514d\u5c40\u90e8\u4e0d\u7a33\u5b9a\u56e0\u7d20\u5bfc\u81f4\u6574\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u96ea\u5d29\u3002<\/p>\n<p>\u8bf4\u767d\u4e86\uff0c\u6211\u89c9\u5f97\u7194\u65ad\u5c31\u50cf\u662f\u90a3\u4e9b\u5bb9\u6613\u5f02\u5e38\u670d\u52a1\u7684\u4e00\u79cd\u4ee3\u7406\uff0c\u8fd9\u4e2a\u4ee3\u7406\u80fd\u591f\u8bb0\u5f55\u6700\u8fd1\u8c03\u7528\u53d1\u751f\u9519\u8bef\u7684\u6b21\u6570\uff0c\u7136\u540e\u51b3\u5b9a\u662f\u7ee7\u7eed\u64cd\u4f5c\uff0c\u8fd8\u662f\u7acb\u5373\u8fd4\u56de\u9519\u8bef\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042406612\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u7194\u65ad\u5668\u5185\u90e8\u7ef4\u62a4\u4e86\u4e00\u4e2a\u7194\u65ad\u5668\u72b6\u6001\u673a\uff0c\u72b6\u6001\u673a\u7684\u8f6c\u6362\u5173\u7cfb\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042406613\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u7194\u65ad\u5668\u6709\u4e09\u79cd\u72b6\u6001\uff1a<\/p>\n<ul>\n<li><strong>Closed\u72b6\u6001<\/strong>\uff1a\u4e5f\u662f\u521d\u59cb\u72b6\u6001\uff0c\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u8c03\u7528\u5931\u8d25\u7684\u8ba1\u6570\u5668\uff0c\u5982\u679c\u8c03\u7528\u5931\u8d25\uff0c\u5219\u4f7f\u5931\u8d25\u6b21\u6570\u52a01\u3002\u5982\u679c\u6700\u8fd1\u5931\u8d25\u6b21\u6570\u8d85\u8fc7\u4e86\u5728\u7ed9\u5b9a\u65f6\u95f4\u5185\u5141\u8bb8\u5931\u8d25\u7684\u9608\u503c\uff0c\u5219\u5207\u6362\u5230Open\u72b6\u6001\uff0c\u6b64\u65f6\u5f00\u542f\u4e00\u4e2a\u8d85\u65f6\u65f6\u949f\uff0c\u5f53\u5230\u8fbe\u8d85\u65f6\u65f6\u949f\u65f6\u95f4\u540e\uff0c\u5219\u5207\u6362\u5230Half Open\u72b6\u6001\uff0c\u8be5\u8d85\u65f6\u65f6\u95f4\u7684\u8bbe\u5b9a\u662f\u7ed9\u4e86\u7cfb\u7edf\u4e00\u6b21\u673a\u4f1a\u6765\u4fee\u6b63\u5bfc\u81f4\u8c03\u7528\u5931\u8d25\u7684\u9519\u8bef\uff0c\u4ee5\u56de\u5230\u6b63\u5e38\u7684\u5de5\u4f5c\u72b6\u6001\u3002\u5728Closed\u72b6\u6001\u4e0b\uff0c\u9519\u8bef\u8ba1\u6570\u662f\u57fa\u4e8e\u65f6\u95f4\u7684\u3002\u5728\u7279\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u5185\u4f1a\u81ea\u52a8\u91cd\u7f6e\uff0c\u8fd9\u80fd\u591f\u9632\u6b62\u7531\u4e8e\u67d0\u6b21\u7684\u5076\u7136\u9519\u8bef\u5bfc\u81f4\u7194\u65ad\u5668\u8fdb\u5165Open\u72b6\u6001\uff0c\u4e5f\u53ef\u4ee5\u57fa\u4e8e\u8fde\u7eed\u5931\u8d25\u7684\u6b21\u6570\u3002<\/li>\n<li><strong>Open\u72b6\u6001<\/strong>\uff1a\u5728\u8be5\u72b6\u6001\u4e0b\uff0c\u5ba2\u6237\u7aef\u8bf7\u6c42\u4f1a\u7acb\u5373\u8fd4\u56de\u9519\u8bef\u54cd\u5e94\uff0c\u800c\u4e0d\u8c03\u7528\u670d\u52a1\u7aef\u3002<\/li>\n<li><strong>Half-Open\u72b6\u6001<\/strong>\uff1a\u5141\u8bb8\u5ba2\u6237\u7aef\u4e00\u5b9a\u6570\u91cf\u7684\u53bb\u8c03\u7528\u670d\u52a1\u7aef\uff0c\u5982\u679c\u8fd9\u4e9b\u8bf7\u6c42\u5bf9\u670d\u52a1\u7684\u8c03\u7528\u6210\u529f\uff0c\u90a3\u4e48\u53ef\u4ee5\u8ba4\u4e3a\u4e4b\u524d\u5bfc\u81f4\u8c03\u7528\u5931\u8d25\u7684\u9519\u8bef\u5df2\u7ecf\u4fee\u6b63\uff0c\u6b64\u65f6\u7194\u65ad\u5668\u5207\u6362\u5230Closed\u72b6\u6001\uff0c\u540c\u65f6\u5c06\u9519\u8bef\u8ba1\u6570\u5668\u91cd\u7f6e\u3002\u5982\u679c\u8fd9\u4e00\u5b9a\u6570\u91cf\u7684\u8bf7\u6c42\u6709\u8c03\u7528\u5931\u8d25\u7684\u60c5\u51b5\uff0c\u5219\u8ba4\u4e3a\u5bfc\u81f4\u4e4b\u524d\u8c03\u7528\u5931\u8d25\u7684\u7684\u95ee\u9898\u4ecd\u7136\u5b58\u5728\uff0c\u7194\u65ad\u5668\u5207\u56de\u5230\u65ad\u5f00\u72b6\u6001\uff0c\u7136\u540e\u91cd\u7f6e\u8ba1\u65f6\u5668\u6765\u7ed9\u7cfb\u7edf\u4e00\u5b9a\u7684\u65f6\u95f4\u6765\u4fee\u6b63\u9519\u8bef\u3002Half-Open\u72b6\u6001\u80fd\u591f\u6709\u6548\u9632\u6b62\u6b63\u5728\u6062\u590d\u4e2d\u7684\u670d\u52a1\u88ab\u7a81\u7136\u800c\u6765\u7684\u5927\u91cf\u8bf7\u6c42\u518d\u6b21\u6253\u6302\u3002<\/li>\n<\/ul>\n<p>\u4e0b\u56fe\u662fNetflix\u7684\u5f00\u6e90\u9879\u76eeHystrix\u4e2d\u7684\u7194\u65ad\u5668\u7684\u5b9e\u73b0\u903b\u8f91\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042406614\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u4ece\u8fd9\u4e2a\u6d41\u7a0b\u56fe\u4e2d\uff0c\u53ef\u4ee5\u770b\u5230\uff1a<\/p>\n<ol>\n<li>\u6709\u8bf7\u6c42\u6765\u4e86\uff0c\u9996\u5148allowRequest()\u51fd\u6570\u5224\u65ad\u662f\u5426\u5728\u7194\u65ad\u4e2d\uff0c\u5982\u679c\u4e0d\u662f\u5219\u653e\u884c\uff0c\u5982\u679c\u662f\u7684\u8bdd\uff0c\u8fd8\u8981\u770b\u6709\u6ca1\u6709\u8fbe\u5230\u4e00\u4e2a\u7194\u65ad\u65f6\u95f4\u7247\uff0c\u5982\u679c\u7194\u65ad\u65f6\u95f4\u7247\u5230\u4e86\uff0c\u4e5f\u653e\u884c\uff0c\u5426\u5219\u76f4\u63a5\u8fd4\u56de\u9519\u8bef\u3002<\/li>\n<li>\u6bcf\u6b21\u8c03\u7528\u90fd\u6709\u4e24\u4e2a\u51fd\u6570makeSuccess(duration)\u548cmakeFailure(duration)\u6765\u7edf\u8ba1\u4e00\u4e0b\u5728\u4e00\u5b9a\u7684duration\u5185\u6709\u591a\u5c11\u662f\u6210\u529f\u8fd8\u662f\u5931\u8d25\u7684\u3002<\/li>\n<li>\u5224\u65ad\u662f\u5426\u7194\u65ad\u7684\u6761\u4ef6isOpen()\uff0c\u662f\u8ba1\u7b97failure\/(success+failure)\u5f53\u524d\u7684\u9519\u8bef\u7387\uff0c\u5982\u679c\u9ad8\u4e8e\u4e00\u4e2a\u9608\u503c\uff0c\u90a3\u4e48\u7194\u65ad\u5668\u6253\u5f00\uff0c\u5426\u5219\u5173\u95ed\u3002<\/li>\n<li>Hystrix\u4f1a\u5728\u5185\u5b58\u4e2d\u7ef4\u62a4\u4e00\u4e2a\u6570\u636e\uff0c\u5176\u4e2d\u8bb0\u5f55\u7740\u6bcf\u4e00\u4e2a\u5468\u671f\u7684\u8bf7\u6c42\u7ed3\u679c\u7684\u7edf\u8ba1\uff0c\u8d85\u8fc7\u65f6\u957f\u957f\u5ea6\u7684\u5143\u7d20\u4f1a\u88ab\u5220\u9664\u6389\u3002<\/li>\n<\/ol>\n<h3>\u7194\u65ad\u5668\u5b9e\u73b0<\/h3>\n<p>\u4e86\u89e3\u4e86\u7194\u65ad\u7684\u539f\u7406\u540e\uff0c\u6211\u4eec\u6765\u81ea\u5df1\u5b9e\u73b0\u4e00\u5957\u7194\u65ad\u5668\u3002<\/p>\n<p>\u719f\u6089go-zero\u7684\u670b\u53cb\u90fd\u77e5\u9053\uff0c\u5728go-zero\u4e2d\u7194\u65ad\u6ca1\u6709\u91c7\u7528\u4e0a\u9762\u4ecb\u7ecd\u7684\u65b9\u5f0f\uff0c\u800c\u662f\u53c2\u8003\u4e86<a href=\"https:\/\/link.segmentfault.com\/?enc=UJQQmmiyeiGq85O2jFBtrw%3D%3D.BloxwFjHyxzieVLhOYenBILqd%2Fruy%2BMriekaCh8SU8eKr9XI3S1IGaTByfEhfwnMWKa6VlkP1ohrYtohEj%2BImn7SEBgYHMzKQPQ85eM%2Fsc8%3D\" rel=\"nofollow\">\u300aGoogle Sre\u300b<\/a> \u91c7\u7528\u4e86\u4e00\u79cd\u81ea\u9002\u5e94\u7684\u7194\u65ad\u673a\u5236\uff0c\u8fd9\u79cd\u81ea\u9002\u5e94\u7684\u65b9\u5f0f\u6709\u4ec0\u4e48\u597d\u5904\u5462\uff1f\u4e0b\u6587\u4f1a\u57fa\u4e8e\u8fd9\u4e24\u79cd\u673a\u5236\u505a\u4e00\u4e2a\u5bf9\u6bd4\u3002<\/p>\n<p>\u4e0b\u9762\u6211\u4eec\u57fa\u4e8e\u4e0a\u9762\u4ecb\u7ecd\u7684\u7194\u65ad\u539f\u7406\uff0c\u5b9e\u73b0\u4e00\u5957\u81ea\u5df1\u7684\u7194\u65ad\u5668\u3002<\/p>\n<p><strong>\u4ee3\u7801\u8def\u5f84\uff1ago-zero\/core\/breaker\/hystrixbreaker.go<\/strong><\/p>\n<p>\u7194\u65ad\u5668\u9ed8\u8ba4\u7684\u72b6\u6001\u4e3aClosed\uff0c\u5f53\u7194\u65ad\u5668\u6253\u5f00\u540e\u9ed8\u8ba4\u7684\u51b7\u5374\u65f6\u95f4\u662f5\u79d2\u949f\uff0c\u5f53\u7194\u65ad\u5668\u5904\u4e8eHalfOpen\u72b6\u6001\u65f6\u9ed8\u8ba4\u7684\u63a2\u6d4b\u65f6\u95f4\u4e3a200\u6beb\u79d2\uff0c\u9ed8\u8ba4\u4f7f\u7528rateTripFunc\u65b9\u6cd5\u6765\u5224\u65ad\u662f\u5426\u89e6\u53d1\u7194\u65ad\uff0c\u89c4\u5219\u662f\u91c7\u6837\u5927\u4e8e\u7b49\u4e8e200\u4e14\u9519\u8bef\u7387\u5927\u4e8e50%\uff0c\u4f7f\u7528\u6ed1\u52a8\u7a97\u53e3\u6765\u8bb0\u5f55\u8bf7\u6c42\u603b\u6570\u548c\u9519\u8bef\u6570\u3002<\/p>\n<pre><code class=\"go\">func newHystrixBreaker() *hystrixBreaker {\n  bucketDuration := time.Duration(int64(window) \/ int64(buckets))\n  stat := collection.NewRollingWindow(buckets, bucketDuration)\n  return &amp;hystrixBreaker{\n    state:          Closed,\n    coolingTimeout: defaultCoolingTimeout,\n    detectTimeout:  defaultDetectTimeout,\n    tripFunc:       rateTripFunc(defaultErrRate, defaultMinSample),\n    stat:           stat,\n    now:            time.Now,\n  }\n}<\/code><\/pre>\n<pre><code class=\"go\">func rateTripFunc(rate float64, minSamples int64) TripFunc {\n  return func(rollingWindow *collection.RollingWindow) bool {\n    var total, errs int64\n    rollingWindow.Reduce(func(b *collection.Bucket) {\n      total += b.Count\n      errs += int64(b.Sum)\n    })\n    errRate := float64(errs) \/ float64(total)\n    return total &gt;= minSamples &amp;&amp; errRate &gt; rate\n  }\n}<\/code><\/pre>\n<p>\u6bcf\u6b21\u8bf7\u6c42\u90fd\u4f1a\u8c03\u7528doReq\u65b9\u6cd5\uff0c\u5728\u8be5\u65b9\u6cd5\u4e2d\uff0c\u9996\u5148\u901a\u8fc7accept()\u65b9\u6cd5\u5224\u65ad\u662f\u5426\u62d2\u7edd\u672c\u6b21\u8bf7\u6c42\uff0c\u62d2\u7edd\u5219\u76f4\u63a5\u8fd4\u56de\u7194\u65ad\u9519\u8bef\u3002\u5426\u5219\u6267\u884creq()\u771f\u6b63\u7684\u53d1\u8d77\u670d\u52a1\u7aef\u8c03\u7528\uff0c\u6210\u529f\u548c\u5931\u8d25\u5206\u522b\u8c03\u7528b.markSuccess()\u548cb.markFailure()<\/p>\n<pre><code class=\"go\">func (b *hystrixBreaker) doReq(req func() error, fallback func(error) error, acceptable Acceptable) error {\n  if err := b.accept(); err != nil {\n    if fallback != nil {\n      return fallback(err)\n    }\n    return err\n  }\n\n  defer func() {\n    if e := recover(); e != nil {\n      b.markFailure()\n      panic(e)\n    }\n  }()\n\n  err := req()\n  if acceptable(err) {\n    b.markSuccess()\n  } else {\n    b.markFailure()\n  }\n\n  return err\n}<\/code><\/pre>\n<p>\u5728accept()\u65b9\u6cd5\u4e2d\uff0c\u9996\u5148\u83b7\u53d6\u5f53\u524d\u7194\u65ad\u5668\u72b6\u6001\uff0c\u5f53\u7194\u65ad\u5668\u5904\u4e8eClosed\u72b6\u6001\u76f4\u63a5\u8fd4\u56de\uff0c\u8868\u793a\u6b63\u5e38\u5904\u7406\u672c\u6b21\u8bf7\u6c42\u3002<\/p>\n<p>\u5f53\u524d\u72b6\u6001\u4e3aOpen\u7684\u65f6\u5019\uff0c\u5224\u65ad\u51b7\u5374\u65f6\u95f4\u662f\u5426\u8fc7\u671f\uff0c\u5982\u679c\u6ca1\u6709\u8fc7\u671f\u7684\u8bdd\u5219\u76f4\u63a5\u8fd4\u56de\u7194\u65ad\u9519\u8bef\u62d2\u7edd\u672c\u6b21\u8bf7\u6c42\uff0c\u5982\u679c\u8fc7\u671f\u7684\u8bdd\u5219\u628a\u7194\u65ad\u5668\u72b6\u6001\u66f4\u6539\u4e3aHalfOpen\uff0c\u51b7\u5374\u65f6\u95f4\u7684\u4e3b\u8981\u76ee\u7684\u662f\u7ed9\u670d\u52a1\u7aef\u4e00\u4e9b\u65f6\u95f4\u8fdb\u884c\u6545\u969c\u6062\u590d\uff0c\u907f\u514d\u6301\u7eed\u8bf7\u6c42\u628a\u670d\u52a1\u7aef\u6253\u6302\u3002<\/p>\n<p>\u5f53\u524d\u72b6\u6001\u4e3aHalfOpen\u7684\u65f6\u5019\uff0c\u9996\u5148\u5224\u65ad\u63a2\u6d4b\u65f6\u95f4\u95f4\u9694\uff0c\u907f\u514d\u63a2\u6d4b\u8fc7\u4e8e\u9891\u7e41\uff0c\u9ed8\u8ba4\u4f7f\u7528200\u6beb\u79d2\u4f5c\u4e3a\u63a2\u6d4b\u95f4\u9694\u3002<\/p>\n<pre><code class=\"go\">func (b *hystrixBreaker) accept() error {\n  b.mux.Lock()\n  switch b.getState() {\n  case Open:\n    now := b.now()\n    if b.openTime.Add(b.coolingTimeout).After(now) {\n      b.mux.Unlock()\n      return ErrServiceUnavailable\n    }\n    if b.getState() == Open {\n      atomic.StoreInt32((*int32)(&amp;b.state), int32(HalfOpen))\n      atomic.StoreInt32(&amp;b.halfopenSuccess, 0)\n      b.lastRetryTime = now\n      b.mux.Unlock()\n    } else {\n      b.mux.Unlock()\n      return ErrServiceUnavailable\n    }\n  case HalfOpen:\n    now := b.now()\n    if b.lastRetryTime.Add(b.detectTimeout).After(now) {\n      b.mux.Unlock()\n      return ErrServiceUnavailable\n    }\n    b.lastRetryTime = now\n    b.mux.Unlock()\n  case Closed:\n    b.mux.Unlock()\n  }\n\n  return nil\n}<\/code><\/pre>\n<p>\u5982\u679c\u672c\u6b21\u8bf7\u6c42\u6b63\u5e38\u8fd4\u56de\uff0c\u5219\u8c03\u7528markSuccess()\u65b9\u6cd5\uff0c\u5982\u679c\u5f53\u524d\u7194\u65ad\u5668\u5904\u4e8eHalfOpen\u72b6\u6001\uff0c\u5219\u5224\u65ad\u5f53\u524d\u63a2\u6d4b\u6210\u529f\u6570\u91cf\u662f\u5426\u5927\u4e8e\u9ed8\u8ba4\u7684\u63a2\u6d4b\u6210\u529f\u6570\u91cf\uff0c\u5982\u679c\u5927\u4e8e\u5219\u628a\u7194\u65ad\u5668\u7684\u72b6\u6001\u66f4\u65b0\u4e3aClosed\u3002<\/p>\n<pre><code class=\"go\">func (b *hystrixBreaker) markSuccess() {\n  b.mux.Lock()\n  switch b.getState() {\n  case Open:\n    b.mux.Unlock()\n  case HalfOpen:\n    atomic.AddInt32(&amp;b.halfopenSuccess, 1)\n    if atomic.LoadInt32(&amp;b.halfopenSuccess) &gt; defaultHalfOpenSuccesss {\n      atomic.StoreInt32((*int32)(&amp;b.state), int32(Closed))\n      b.stat.Reduce(func(b *collection.Bucket) {\n        b.Count = 0\n        b.Sum = 0\n      })\n    }\n    b.mux.Unlock()\n  case Closed:\n    b.stat.Add(1)\n    b.mux.Unlock()\n  }\n}<\/code><\/pre>\n<p>\u5728markFailure()\u65b9\u6cd5\u4e2d\uff0c\u5982\u679c\u5f53\u524d\u72b6\u6001\u662fClosed\u901a\u8fc7\u6267\u884ctripFunc\u6765\u5224\u65ad\u662f\u5426\u6ee1\u8db3\u7194\u65ad\u6761\u4ef6\uff0c\u5982\u679c\u6ee1\u8db3\u5219\u628a\u7194\u65ad\u5668\u72b6\u6001\u66f4\u6539\u4e3aOpen\u72b6\u6001\u3002<\/p>\n<pre><code class=\"go\">func (b *hystrixBreaker) markFailure() {\n  b.mux.Lock()\n  b.stat.Add(0)\n  switch b.getState() {\n  case Open:\n    b.mux.Unlock()\n  case HalfOpen:\n    b.openTime = b.now()\n    atomic.StoreInt32((*int32)(&amp;b.state), int32(Open))\n    b.mux.Unlock()\n  case Closed:\n    if b.tripFunc != nil &amp;&amp; b.tripFunc(b.stat) {\n      b.openTime = b.now()\n      atomic.StoreInt32((*int32)(&amp;b.state), int32(Open))\n    }\n    b.mux.Unlock()\n  }\n}<\/code><\/pre>\n<p>\u7194\u65ad\u5668\u7684\u5b9e\u73b0\u903b\u8f91\u603b\u4f53\u6bd4\u8f83\u7b80\u5355\uff0c\u9605\u8bfb\u4ee3\u7801\u57fa\u672c\u90fd\u80fd\u7406\u89e3\uff0c\u8fd9\u90e8\u5206\u4ee3\u7801\u5b9e\u73b0\u7684\u6bd4\u8f83\u4ed3\u4fc3\uff0c\u53ef\u80fd\u4f1a\u6709bug\uff0c\u5982\u679c\u5927\u5bb6\u53d1\u73b0bug\u53ef\u4ee5\u968f\u65f6\u8054\u7cfb\u6211\u8fdb\u884c\u4fee\u6b63\u3002<\/p>\n<h4>hystrixBreaker\u548cgooglebreaker\u5bf9\u6bd4<\/h4>\n<p>\u63a5\u4e0b\u6765\u5bf9\u6bd4\u4e00\u4e0b\u4e24\u79cd\u7194\u65ad\u5668\u7684\u7194\u65ad\u6548\u679c\u3002<\/p>\n<p>\u8fd9\u90e8\u5206\u793a\u4f8b\u4ee3\u7801\u5728\uff1ago-zero\/example\u4e0b<\/p>\n<p>\u5206\u522b\u5b9a\u4e49\u4e86user-api\u548cuser-rpc\u670d\u52a1\uff0cuser-api\u4f5c\u4e3a\u5ba2\u6237\u7aef\u5bf9user-rpc\u8fdb\u884c\u8bf7\u6c42\uff0cuser-rpc\u4f5c\u4e3a\u670d\u52a1\u7aef\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002<\/p>\n<p>\u5728user-rpc\u7684\u793a\u4f8b\u65b9\u6cd5\u4e2d\uff0c\u670920%\u7684\u51e0\u7387\u8fd4\u56de\u9519\u8bef\u3002<\/p>\n<pre><code class=\"go\">func (l *UserInfoLogic) UserInfo(in *user.UserInfoRequest) (*user.UserInfoResponse, error) {\n  ts := time.Now().UnixMilli()\n  if in.UserId == int64(1) {\n    if ts%5 == 1 {\n      return nil, status.Error(codes.Internal, &quot;internal error&quot;)\n    }\n    return &amp;user.UserInfoResponse{\n      UserId: 1,\n      Name:   &quot;jack&quot;,\n    }, nil\n\n  }\n  return &amp;user.UserInfoResponse{}, nil\n}<\/code><\/pre>\n<p>\u5728user-api\u7684\u793a\u4f8b\u65b9\u6cd5\u4e2d\uff0c\u5bf9user-rpc\u53d1\u8d77\u8bf7\u6c42\uff0c\u7136\u540e\u4f7f\u7528prometheus\u6307\u6807\u8bb0\u5f55\u6b63\u5e38\u8bf7\u6c42\u7684\u6570\u91cf\u3002<\/p>\n<pre><code class=\"go\">var metricSuccessReqTotal = metric.NewCounterVec(&amp;metric.CounterVecOpts{\n  Namespace: &quot;circuit_breaker&quot;,\n  Subsystem: &quot;requests&quot;,\n  Name:      &quot;req_total&quot;,\n  Help:      &quot;test for circuit breaker&quot;,\n  Labels:    []string{&quot;method&quot;},\n})\n\nfunc (l *UserInfoLogic) UserInfo() (resp *types.UserInfoResponse, err error) {\n  for {\n    _, err := l.svcCtx.UserRPC.UserInfo(l.ctx, &amp;user.UserInfoRequest{UserId: int64(1)})\n    if err != nil &amp;&amp; err == breaker.ErrServiceUnavailable {\n      fmt.Println(err)\n      continue\n    }\n    metricSuccessReqTotal.Inc(&quot;UserInfo&quot;)\n  }\n\n  return &amp;types.UserInfoResponse{}, nil\n}<\/code><\/pre>\n<p>\u542f\u52a8\u4e24\u4e2a\u670d\u52a1\uff0c\u7136\u540e\u89c2\u5bdf\u5728\u4e24\u79cd\u7194\u65ad\u7b56\u7565\u4e0b\u6b63\u5e38\u8bf7\u6c42\u7684\u6570\u91cf\u3002<\/p>\n<p>googleBreaker\u7194\u65ad\u5668\u7684\u6b63\u5e38\u8bf7\u6c42\u7387\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042406615\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>hystrixBreaker\u7194\u65ad\u5668\u7684\u6b63\u5e38\u8bf7\u6c42\u7387\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042406616\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u4ece\u4e0a\u9762\u7684\u5b9e\u9a8c\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0cgo-zero\u5185\u7f6e\u7684googleBreaker\u7684\u6b63\u5e38\u8bf7\u6c42\u6570\u662f\u9ad8\u4e8ehystrixBreaker\u7684\u3002\u8fd9\u662f\u56e0\u4e3ahystrixBreaker\u7ef4\u62a4\u4e86\u4e09\u79cd\u72b6\u6001\uff0c\u5f53\u8fdb\u5165Open\u72b6\u6001\u540e\u4e3a\u4e86\u907f\u514d\u7ee7\u7eed\u5bf9\u670d\u52a1\u7aef\u53d1\u8d77\u8bf7\u6c42\u9020\u6210\u538b\u529b\uff0c\u4f1a\u4f7f\u7528\u4e00\u4e2a\u51b7\u5374\u65f6\u949f\uff0c\u800c\u5728\u8fd9\u6bb5\u65f6\u95f4\u91cc\u662f\u4e0d\u4f1a\u653e\u8fc7\u4efb\u4f55\u8bf7\u6c42\u7684\uff0c\u540c\u65f6\uff0c\u4eceHalfOpen\u72b6\u6001\u53d8\u4e3aClosed\u72b6\u6001\u540e\uff0c\u77ac\u95f4\u53c8\u4f1a\u6709\u5927\u91cf\u7684\u8bf7\u6c42\u53d1\u5f80\u670d\u52a1\u7aef\uff0c\u8fd9\u65f6\u670d\u52a1\u7aef\u5f88\u53ef\u80fd\u8fd8\u6ca1\u6062\u590d\uff0c\u4ece\u800c\u5bfc\u81f4\u7194\u65ad\u5668\u53c8\u53d8\u4e3aOpen\u72b6\u6001\u3002\u800cgoogleBreaker\u91c7\u7528\u7684\u662f\u4e00\u79cd\u81ea\u9002\u5e94\u7684\u7194\u65ad\u7b56\u7565\uff0c\u4e5f\u4e0d\u9700\u8981\u591a\u79cd\u72b6\u6001\uff0c\u4e5f\u4e0d\u4f1a\u50cfhystrixBreaker\u90a3\u6837\u4e00\u5200\u5207\uff0c\u800c\u662f\u4f1a\u5c3d\u53ef\u80fd\u591a\u7684\u5904\u7406\u8bf7\u6c42\uff0c\u8fd9\u4e0d\u4e5f\u662f\u6211\u4eec\u671f\u671b\u7684\u561b\uff0c\u6bd5\u7adf\u7194\u65ad\u5bf9\u5ba2\u6237\u6765\u8bf4\u662f\u6709\u635f\u7684\u3002\u4e0b\u9762\u6211\u4eec\u6765\u4e00\u8d77\u5b66\u4e60\u4e0bgo-zero\u5185\u7f6e\u7684\u7194\u65ad\u5668googleBreaker\u3002<\/p>\n<h3>\u6e90\u7801\u89e3\u8bfb<\/h3>\n<p>googleBreaker\u7684\u4ee3\u7801\u8def\u5f84\u5728\uff1ago-zero\/core\/breaker\/googlebreaker.go<\/p>\n<p>\u5728doReq()\u65b9\u6cd5\u4e2d\u901a\u8fc7accept()\u65b9\u6cd5\u5224\u65ad\u662f\u5426\u89e6\u53d1\u7194\u65ad\uff0c\u5982\u679c\u89e6\u53d1\u7194\u65ad\u5219\u8fd4\u56deerror\uff0c\u8fd9\u91cc\u5982\u679c\u5b9a\u4e49\u4e86\u56de\u8c03\u51fd\u6570\u7684\u8bdd\u53ef\u4ee5\u6267\u884c\u56de\u8c03\uff0c\u6bd4\u5982\u505a\u4e00\u4e9b\u964d\u7ea7\u6570\u636e\u7684\u5904\u7406\u7b49\u3002\u5982\u679c\u8bf7\u6c42\u6b63\u5e38\u5219\u901a\u8fc7markSuccess()\u7ed9\u603b\u8bf7\u6c42\u6570\u548c\u6b63\u5e38\u8bf7\u6c42\u6570\u90fd\u52a01\uff0c\u5982\u679c\u8bf7\u6c42\u5931\u8d25\u901a\u8fc7markFailure\u5219\u53ea\u7ed9\u603b\u8bf7\u6c42\u6570\u52a01\u3002<\/p>\n<pre><code class=\"go\">func (b *googleBreaker) doReq(req func() error, fallback func(err error) error, acceptable Acceptable) error {\n  if err := b.accept(); err != nil {\n    if fallback != nil {\n      return fallback(err)\n    }\n\n    return err\n  }\n\n  defer func() {\n    if e := recover(); e != nil {\n      b.markFailure()\n      panic(e)\n    }\n  }()\n\n  err := req()\n  if acceptable(err) {\n    b.markSuccess()\n  } else {\n    b.markFailure()\n  }\n\n  return err\n}<\/code><\/pre>\n<p>\u5728accept()\u65b9\u6cd5\u4e2d\u901a\u8fc7\u8ba1\u7b97\u5224\u65ad\u662f\u5426\u89e6\u53d1\u7194\u65ad\u3002<\/p>\n<p>\u5728\u8be5\u7b97\u6cd5\u4e2d\uff0c\u9700\u8981\u8bb0\u5f55\u4e24\u4e2a\u8bf7\u6c42\u6570\uff0c\u5206\u522b\u662f\uff1a<\/p>\n<ul>\n<li>\u8bf7\u6c42\u603b\u91cf\uff08requests\uff09: \u8c03\u7528\u65b9\u53d1\u8d77\u8bf7\u6c42\u7684\u6570\u91cf\u603b\u548c<\/li>\n<li>\u6b63\u5e38\u5904\u7406\u7684\u8bf7\u6c42\u6570\u91cf\uff08accepts\uff09: \u670d\u52a1\u7aef\u6b63\u5e38\u5904\u7406\u7684\u8bf7\u6c42\u6570\u91cf<\/li>\n<\/ul>\n<p>\u5728\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e24\u4e2a\u503c\u662f\u76f8\u7b49\u7684\uff0c\u968f\u7740\u88ab\u8c03\u7528\u65b9\u670d\u52a1\u51fa\u73b0\u5f02\u5e38\u5f00\u59cb\u62d2\u7edd\u8bf7\u6c42\uff0c\u8bf7\u6c42\u63a5\u53d7\u6570\u91cf(accepts)\u7684\u503c\u5f00\u59cb\u9010\u6e10\u5c0f\u4e8e\u8bf7\u6c42\u6570\u91cf(requests)\uff0c\u8fd9\u4e2a\u65f6\u5019\u8c03\u7528\u65b9\u53ef\u4ee5\u7ee7\u7eed\u53d1\u9001\u8bf7\u6c42\uff0c\u76f4\u5230requests = K * accepts\uff0c\u4e00\u65e6\u8d85\u8fc7\u8fd9\u4e2a\u9650\u5236\uff0c\u7194\u65ad\u5668\u5c31\u4f1a\u6253\u5f00\uff0c\u65b0\u7684\u8bf7\u6c42\u4f1a\u5728\u672c\u5730\u4ee5\u4e00\u5b9a\u7684\u6982\u7387\u88ab\u629b\u5f03\u76f4\u63a5\u8fd4\u56de\u9519\u8bef\uff0c\u6982\u7387\u7684\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"go\">max(0, (requests - K * accepts) \/ (requests + 1))<\/code><\/pre>\n<p>\u901a\u8fc7\u4fee\u6539\u7b97\u6cd5\u4e2d\u7684K(\u500d\u503c)\uff0c\u53ef\u4ee5\u8c03\u8282\u7194\u65ad\u5668\u7684\u654f\u611f\u5ea6\uff0c\u5f53\u964d\u4f4e\u8be5\u500d\u503c\u4f1a\u4f7f\u81ea\u9002\u5e94\u7194\u65ad\u7b97\u6cd5\u66f4\u654f\u611f\uff0c\u5f53\u589e\u52a0\u8be5\u500d\u503c\u4f1a\u4f7f\u5f97\u81ea\u9002\u5e94\u7194\u65ad\u7b97\u6cd5\u964d\u4f4e\u654f\u611f\u5ea6\uff0c\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5047\u8bbe\u5c06\u8c03\u7528\u65b9\u7684\u8bf7\u6c42\u4e0a\u9650\u4ece requests = 2 <em>acceptst \u8c03\u6574\u4e3a requests = 1.1<\/em> accepts \u90a3\u4e48\u5c31\u610f\u5473\u7740\u8c03\u7528\u65b9\u6bcf\u5341\u4e2a\u8bf7\u6c42\u4e4b\u4e2d\u5c31\u6709\u4e00\u4e2a\u8bf7\u6c42\u4f1a\u89e6\u53d1\u7194\u65ad\u3002<\/p>\n<pre><code class=\"go\">func (b *googleBreaker) accept() error {\n  accepts, total := b.history()\n  weightedAccepts := b.k * float64(accepts)\n  \/\/ https:\/\/landing.google.com\/sre\/sre-book\/chapters\/handling-overload\/#eq2101\n  dropRatio := math.Max(0, (float64(total-protection)-weightedAccepts)\/float64(total+1))\n  if dropRatio &lt;= 0 {\n    return nil\n  }\n\n  if b.proba.TrueOnProba(dropRatio) {\n    return ErrServiceUnavailable\n  }\n\n  return nil\n}<\/code><\/pre>\n<p>history\u4ece\u6ed1\u52a8\u7a97\u53e3\u4e2d\u7edf\u8ba1\u5f53\u524d\u7684\u603b\u8bf7\u6c42\u6570\u548c\u6b63\u5e38\u5904\u7406\u7684\u8bf7\u6c42\u6570\u3002<\/p>\n<pre><code class=\"go\">func (b *googleBreaker) history() (accepts, total int64) {\n  b.stat.Reduce(func(b *collection.Bucket) {\n    accepts += int64(b.Sum)\n    total += b.Count\n  })\n\n  return\n}<\/code><\/pre>\n<h3>\u7ed3\u675f\u8bed<\/h3>\n<p>\u672c\u7bc7\u6587\u7ae0\u4ecb\u7ecd\u4e86\u670d\u52a1\u6cbb\u7406\u4e2d\u7684\u4e00\u79cd\u5ba2\u6237\u7aef\u8282\u6d41\u673a\u5236 &#8211; \u7194\u65ad\u3002\u5728hystrix\u7194\u65ad\u7b56\u7565\u4e2d\u9700\u8981\u5b9e\u73b0\u4e09\u4e2a\u72b6\u6001\uff0c\u5206\u522b\u662fOpen\u3001HalfOpen\u548cClosed\u3002\u4e0d\u540c\u72b6\u6001\u7684\u5207\u6362\u65f6\u673a\u5728\u4e0a\u6587\u4e2d\u4e5f\u6709\u8be6\u7ec6\u63cf\u8ff0\uff0c\u5927\u5bb6\u53ef\u4ee5\u53cd\u590d\u9605\u8bfb\u7406\u89e3\uff0c\u6700\u597d\u662f\u80fd\u81ea\u5df1\u52a8\u624b\u5b9e\u73b0\u4e00\u4e0b\u3002\u5bf9\u4e8ego-zero\u5185\u7f6e\u7684\u7194\u65ad\u5668\u662f\u6ca1\u6709\u72b6\u6001\u7684\uff0c\u5982\u679c\u975e\u8981\u8bf4\u5b83\u7684\u72b6\u6001\u7684\u8bdd\uff0c\u90a3\u4e48\u4e5f\u53ea\u6709\u6253\u5f00\u548c\u5173\u95ed\u4e24\u79cd\u60c5\u51b5\uff0c\u5b83\u662f\u6839\u636e\u5f53\u524d\u8bf7\u6c42\u7684\u6210\u529f\u7387\u81ea\u9002\u5e94\u7684\u4e22\u5f03\u8bf7\u6c42\uff0c\u662f\u4e00\u79cd\u66f4\u5f39\u6027\u7684\u7194\u65ad\u7b56\u7565\uff0c\u4e22\u5f03\u8bf7\u6c42\u6982\u7387\u968f\u7740\u6b63\u5e38\u5904\u7406\u7684\u8bf7\u6c42\u6570\u4e0d\u65ad\u53d8\u5316\uff0c\u6b63\u5e38\u5904\u7406\u7684\u8bf7\u6c42\u8d8a\u591a\u4e22\u5f03\u8bf7\u6c42\u7684\u6982\u7387\u5c31\u8d8a\u4f4e\uff0c\u53cd\u4e4b\u4e22\u5f03\u8bf7\u6c42\u7684\u6982\u7387\u5c31\u8d8a\u9ad8\u3002<\/p>\n<p>\u867d\u7136\u7194\u65ad\u7684\u539f\u7406\u90fd\u4e00\u6837\uff0c\u4f46\u5b9e\u73b0\u673a\u5236\u4e0d\u540c\u5bfc\u81f4\u7684\u6548\u679c\u53ef\u80fd\u4e5f\u4e0d\u540c\uff0c\u5728\u5b9e\u9645\u751f\u4ea7\u4e2d\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u9009\u62e9\u7b26\u5408\u4e1a\u52a1\u573a\u666f\u7684\u7194\u65ad\u7b56\u7565\u3002<\/p>\n<p>\u5e0c\u671b\u672c\u7bc7\u6587\u7ae0\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p>\u672c\u7bc7\u6587\u7ae0\u4ee3\u7801\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=xvOL7%2BfzyAPP0VkqZNiwbQ%3D%3D.in3Opd4b%2Bqw4xHGrJbxIYnYmvcbCW%2F6SYEQvkTunfzo2uJceOc2b0Ek4IG5GUS2RGeT9AuTkkDqmL2ob41P4aA%3D%3D\" rel=\"nofollow\">https:\/\/github.com\/zhoushugua&#8230;<\/a><\/p>\n<h3>\u53c2\u8003<\/h3>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=5HxG0cq%2F1UxZKGKpBcky0Q%3D%3D.G6gRrfLqGRigo7Jx76pjZiYrPHlspkLYsiz1HiwdIjvZAyZdohCzBTcwKvz5NwG3ooSUbNpaBto2TEBDJ3qqsA%3D%3D\" rel=\"nofollow\">https:\/\/martinfowler.com\/blik&#8230;<\/a><\/p>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=u2G3xz5Ef7c%2FDvfmkugH%2Fg%3D%3D.RE28JXLIwREBYSjEv4UpyjzsvPJJIN9i0v%2BBPtdva%2FWyica7UkI%2Fx0Qw%2BHidNYzZqpSo0Ma3Ob%2BrbsWZPy12Sw%3D%3D\" rel=\"nofollow\">https:\/\/github.com\/Netflix\/Hy&#8230;<\/a><\/p>\n<h2>\u9879\u76ee\u5730\u5740<\/h2>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=S8N6YIQEBDdPhWk61%2Fbldg%3D%3D.DTGyHOE0O0qcNUz6u2ai%2B04MRrbKHrGkHAlqBdLPsbPcTIowOWcwzaFiTGbGiio%2F\" rel=\"nofollow\">https:\/\/github.com\/zeromicro\/go-zero<\/a><\/p>\n<p>\u6b22\u8fce\u4f7f\u7528 <code>go-zero<\/code> \u5e76 <strong>star<\/strong> \u652f\u6301\u6211\u4eec\uff01<\/p>\n<h2>\u5fae\u4fe1\u4ea4\u6d41\u7fa4<\/h2>\n<p>\u5173\u6ce8\u300e<strong>\u5fae\u670d\u52a1\u5b9e\u8df5<\/strong>\u300f\u516c\u4f17\u53f7\u5e76\u70b9\u51fb <strong>\u4ea4\u6d41\u7fa4<\/strong> \u83b7\u53d6\u793e\u533a\u7fa4\u4e8c\u7ef4\u7801\u3002<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042406609\">https:\/\/segmentfault.com\/a\/1190000042406609<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7194\u65ad\u673a\u5236\uff08Circuit Breaker\uff09\u6307\u7684\u662f\u5728\u80a1\u7968\u5e02\u573a\u7684\u4ea4\u6613\u65f6\u95f4\u4e2d\uff0c\u5f53\u4ef7\u683c\u7684\u6ce2\u52a8\u5e45\u5ea6\u8fbe\u5230\u67d0\u4e00\u4e2a\u9650\u5b9a\u7684\u76ee\u6807\uff08 [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006358","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006358","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006358"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006358\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}