{"id":10006360,"date":"2022-08-31T12:33:46","date_gmt":"2022-08-31T04:33:46","guid":{"rendered":"https:\/\/ityet.com\/?p=10006360"},"modified":"2022-08-31T12:33:46","modified_gmt":"2022-08-31T04:33:46","slug":"%e9%95%bf%e7%af%87%e5%9b%be%e8%a7%a3etcd%e6%a0%b8%e5%bf%83%e5%ba%94%e7%94%a8%e5%9c%ba%e6%99%af%e5%8f%8a%e7%bc%96%e7%a0%81%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006360","title":{"rendered":"\u957f\u7bc7\u56fe\u89e3etcd\u6838\u5fc3\u5e94\u7528\u573a\u666f\u53ca\u7f16\u7801\u5b9e\u6218"},"content":{"rendered":"<p>\u5927\u5bb6\u597d\u554a\uff0c\u6211\u662f\u5b57\u6bcd\u54e5\uff0c\u4eca\u5929\u5199\u4e00\u7bc7\u5173\u4e8eetcd\u7684\u6587\u7ae0\uff0c\u5176\u5b9e\u7f51\u4e0a\u4e5f\u6709\u5f88\u591a\u5173\u4e8eetcd\u7684\u4ecb\u7ecd\uff0c<strong>\u6211\u5c31\u7b80\u660e\u627c\u8981\uff0c\u603b\u7ed3\u63d0\u70bc\uff0c\u671f\u671b\u5927\u5bb6\u901a\u8fc7\u8fd9\u4e00\u7bc7\u6587\u7ae0\u638c\u63e1etcd\u7684\u6838\u5fc3\u77e5\u8bc6\u4ee5\u53ca\u7f16\u7801\u6280\u80fd<\/strong>\uff01<\/p>\n<ul>\n<li>\u672c\u6587\u9996\u5148\u7528\u5927\u767d\u8bdd\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u4e00\u4e0betcd\u662f\u4ec0\u4e48\uff1f\u8fd9\u90e8\u5206\u5185\u5bb9\u7f51\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u4e86\u3002<\/li>\n<li>etcd\u6709\u54ea\u4e9b\u5e94\u7528\u573a\u666f\uff1f\u8fd9\u4e9b\u5e94\u7528\u573a\u666f\u7684\u6838\u5fc3\u539f\u7406\u662f\u4ec0\u4e48\uff1f<\/li>\n<li>\u6700\u540e\u4e0d\u80fd\u5149\u52a8\u5634\u4e0d\u52a8\u624b\u3002\u5148\u642d\u5efa\u4e00\u4e2aetcd\u5355\u673a\u7248\uff0c\u518d\u4f7f\u7528java\u7684\u5ba2\u6237\u7aef\u64cd\u4f5cetcd\u6570\u636e\u3002<\/li>\n<\/ul>\n<p>\u672c\u6587\u65e8\u5728\u5e2e\u52a9\u5927\u5bb6\u7406\u89e3etcd\uff0c\u4ece\u5b8f\u89c2\u89d2\u5ea6\u4fef\u77b0etcd\u5168\u5c40\uff0c\u638c\u63e1etcd\u7684\u57fa\u672c\u64cd\u4f5c\u6280\u80fd\u3002\u540e\u7eed\u6211\u8fd8\u4f1a\u5199\u4e00\u4e2a\u7cfb\u5217\u7684\u6587\u7ae0\uff0c\u5c06\u6bcf\u4e00\u79cd\u5e94\u7528\u573a\u666f\u4ee3\u7801\u5316\uff0c\u671f\u5f85\u5927\u5bb6\u5173\u6ce8\u6211\u548c\u6211\u7684\u516c\u4f17\u53f7\uff1a\u5b57\u6bcd\u54e5\u6742\u8c08\u3002\u540e\u7eed\u8ba1\u5212\u7ae0\u8282\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u300a\u642d\u5efa\u9ad8\u53ef\u7528etcd\u96c6\u7fa4\u300b<\/li>\n<li>\u300a\u57fa\u4e8eetcd\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff08java\u4ee3\u7801\u5b9e\u73b0\uff09\u300b<\/li>\n<li>\u300a\u57fa\u4e8eetcd\u5b9e\u73b0\u914d\u7f6e\u53d8\u66f4\u901a\u77e5\uff08java\u4ee3\u7801\u5b9e\u73b0\uff09\u300b<\/li>\n<li>\u300a\u57fa\u4e8eetcd\u5b9e\u73b0\u670d\u52a1\u6ce8\u518c\u4e0e\u53d1\u73b0\uff08java\u4ee3\u7801\u5b9e\u73b0\uff09\u300b<\/li>\n<li>\u300a\u57fa\u4e8eetcd\u5b9e\u73b0\u5206\u5e03\u5f0f\u7cfb\u7edf\u8282\u70b9leader\u9009\u4e3e\uff08java\u4ee3\u7801\u5b9e\u73b0\uff09\u300b<\/li>\n<\/ul>\n<h2>\u4e00\u3001\u767d\u8bddetcd\u4e0ezookeeper<\/h2>\n<p>\u7528\u8fc7linux\u7684\u670b\u53cb\u8bf7\u4e3e\u624b\uff0c\u597d\u7684\uff0c\u6211\u770b\u89c1\u4e86\uff01 \u5728 linux \u4e2d\u6240\u6709\u81ea\u52a8\u5b89\u88c5\u7684\u7cfb\u7edf\u8f6f\u4ef6\u914d\u7f6e\u6587\u4ef6\u90fd\u5b58\u50a8\u5728\u4e00\u4e2a\u540d\u4e3a<code>\/etc<\/code>\u7684\u76ee\u5f55\u4e2d\u3002\u201cd\u201d\u8868\u793a<strong>distributed<\/strong>\u5206\u5e03\u5f0f\uff0cetcd\u4e3a\u5206\u5e03\u5f0f\u6a21\u578b\uff0c\u6240\u4ee5etcd\u7684\u6838\u5fc3\u5e94\u7528\u573a\u666f\u662f\uff1a<strong>\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u914d\u7f6e\u4fe1\u606f\u5b58\u50a8<\/strong>\u3002<\/p>\n<p>\u7f51\u4e0a\u5f88\u591a\u6587\u7ae0\u4e0a\u6765\u7b2c\u4e00\u53e5\u8bdd\u7167\u642c\u82f1\u6587\u5b98\u7f51\uff1a<strong>etcd \u662f\u4e00\u4e2a\u9ad8\u5ea6\u4e00\u81f4\u7684\u5206\u5e03\u5f0f\u952e\u503c\u5b58\u50a8\u7cfb\u7edf<\/strong>\u3002\u5f88\u591a\u670b\u53cb\u770b\u5b8c\u5c31\u95ee\u4e86\uff0c\u8fd9\u73a9\u610f\u548credis\u6709\u5565\u533a\u522b\uff1f \u7b14\u8005\u8981\u8bf4\uff0c\u771f\u7684\u4e0d\u8981\u8fd9\u4e48\u6bd4\uff0cetcd\u4ece\u540d\u5b57\u4e0a\u5c31\u5df2\u7ecf\u544a\u8bc9\u4f60\u4e86\uff0c\u5b83\u662f\u5b58\u50a8\u914d\u7f6e\u4fe1\u606f(\u5143\u6570\u636e)\u7684\u3002\u548credis\u5728\u67b6\u6784\u5e94\u7528\u4e0a\u5c31\u4e0d\u5728\u4e00\u4e2a\u5c42\u9762\uff0c\u5b83\u5bf9\u6807\u7684\u4ea7\u54c1\u5e94\u8be5\u662fzookeeper\u3002\u867d\u7136zookeeper\u5728\u5f88\u591ajava\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5e94\u7528\u4e2d\u6bd4\u8f83\u5e7f\u6cdb\uff0c\u4f46\u662fetcd\u4f5c\u4e3a\u540e\u8d77\u4e4b\u79c0\uff0c\u4e58kubernetes\u7684\u4e1c\u98ce\uff0c\u5927\u6709\u8d85\u8d8azookeeper\u7684\u8d8b\u52bf\u3002<\/p>\n<ul>\n<li>zookeeper\u662f\u4f7f\u7528java\u5199\u7684\uff0c etcd\u662f\u4f7f\u7528go\u8bed\u8a00\u7f16\u5199\u7684\u3002zookeeper\u4f7f\u7528\u4e86TCP\u534f\u8bae\uff0c\u5176\u4ea4\u4e92\u62a5\u6587\u89c4\u5219\u662f\u5b8c\u5168\u81ea\u5b9a\u4e49\u7684\uff0c\u5982\u679c\u4e0d\u4f7f\u7528zookeeper\u63d0\u4f9b\u7684SDK\u5c31\u65e0\u6cd5\u64cd\u4f5c\u6570\u636e\u3002\u800cetcd\u4f7f\u7528\u7684\u662fgoogle\u7684gRPC\u534f\u8bae\uff0c\u666e\u9002\u6027\u66f4\u597d\u4e00\u4e9b\u3002<\/li>\n<li>zookeeper\u5bf9\u4e8e\u4e00\u6b21\u8bf7\u6c42\uff0c\u5f00\u542f\u4e00\u4e2asocket\u8fdb\u884c\u76d1\u542c\u3002\u800cetcd\u7684\u76d1\u542c\u7ba1\u9053channel\u53ef\u4ee5\u53cd\u590d\u88ab\u5229\u7528\uff0c\u4eceIO\u6027\u80fd\u5230\u7cfb\u7edf\u8d44\u6e90\u7684\u5229\u7528\u7684\u89d2\u5ea6\uff0cetcd\u65e0\u7591\u662f\u66f4\u4f18\u79c0\u7684\u3002<\/li>\n<li>zookeeper\u4f7f\u7528zab\u534f\u8bae\u4fdd\u8bc1\u96c6\u7fa4\u8282\u70b9\u914d\u7f6e\u4fe1\u606f\u7684\u4e00\u81f4\u6027\uff0cetcd\u4f7f\u7528raft\u534f\u8bae\u3002\u671f\u671b\u8be6\u7ec6\u4e86\u89e3raft\u534f\u8bae\u7684\uff0c\u70b9\u51fb<a href=\"https:\/\/link.segmentfault.com\/?enc=yTv9ELMCV9kMkwVSP2itUw%3D%3D.nbcgLICRirw%2BdgyFTKUv27AcyzGMJxXWSNrhDKPO63aPNV9ZMWZqt%2FAh2swawfWKVd91cm082f%2FtZyPp%2BYguRw%3D%3D\" rel=\"nofollow\">\u300araft\u534f\u8bae\u4e2d\u6587\u4ecb\u7ecd\u300b<\/a>\u3002<\/li>\n<\/ul>\n<p><strong>\u5927\u90e8\u5206\u529f\u80fd\u548czookeeper\u90fd\u662f\u4e00\u6837\u7684\uff0c\u76ee\u524d\u770bjava\u7a0b\u5e8f\u5458\u7528zookeeper\u7684\u66f4\u591a\uff0c\u5176\u4ed6\u7a0b\u5e8f\u5458\u7528etcd\u66f4\u591a\u3002\u90fd\u662f\u57fa\u4e8e\u4e60\u60ef\uff0c\u4f46\u7b14\u8005\u63a8\u8350etcd\u3002<\/strong><\/p>\n<h2>\u4e8c\u3001etcd\u76844\u4e2a\u6838\u5fc3\u673a\u5236<\/h2>\n<p>etcd\u4ee5key-value\u7684\u5f62\u5f0f\u8fdb\u884c\u6570\u636e\u7684\u5b58\u50a8. \u914d\u5408\u4e0b\u9762\u7684\u8fd9\u56db\u79cd\u673a\u5236,\u4f7f\u5f97etcd\u7684\u5e94\u7528\u573a\u666f\u66f4\u52a0\u7684\u5e7f\u6cdb.<\/p>\n<ul>\n<li><strong>Prefix \u673a\u5236<\/strong>\uff1a\u5373\u524d\u7f00\u673a\u5236\uff0c\u4e5f\u79f0<strong>\u76ee\u5f55\u673a\u5236<\/strong>\uff0c\u5ba2\u6237\u7aef\u5411etcd\u653e\u51652\u4e2a\u952e\u503c\u5bf9\u914d\u7f6e, \u5047\u5982\u4e00\u4e2akey\u662f\u201c\/test\/key1&#8243; , \u53e6\u4e00\u4e2akey\u662f&#8221;\/test\/key2&#8243;. \u5219\u901a\u8fc7\u524d\u7f00&#8221;\/test&#8221;\u67e5\u8be2etcd\uff0c\u8fd4\u56de\u4e00\u4e2a\u5217\u8868\u5305\u542bkey\u4e3a\u201c\/test\/key1&#8243; \u548c&#8221;\/test\/key2&#8243;\u7684\u952e\u503c\u5bf9\u6570\u636e\uff1b<\/li>\n<li><strong>Watch \u673a\u5236<\/strong>\uff1a\u5373\u76d1\u542c\u673a\u5236\uff0cwatch\u673a\u5236\u9488\u5bf9\u67d0\u4e2akey\u8fdb\u884c\u76d1\u542c,\u4e5f\u652f\u6301\u9488\u5bf9\u524d\u7f00\u8fdb\u884c\u8303\u56f4\u76d1\u542c. \u5f53\u88ab\u76d1\u542c\u7684key \u6216\u524d\u7f00\u8303\u56f4\u53d1\u751f\u53d8\u5316\u7684\u65f6\u5019\uff0c\u5ba2\u6237\u7aef\u4f1a\u6536\u5230\u53d8\u66f4\u901a\u77e5\uff1b<\/li>\n<li><strong>Lease \u673a\u5236<\/strong>\uff1a\u5373\u79df\u7ea6\u673a\u5236\uff08TTL\uff0cTime To Live\uff09\uff0c\u652f\u6301\u4e3akey-value\u589e\u52a0\u4e00\u4e2a\u5b58\u6d3b\u65f6\u95f4,\u8d85\u8fc7\u8fd9\u4e2a\u65f6\u95f4key-value\u5c06\u8fc7\u671f\u88ab\u5220\u9664. \u652f\u6301\u89e3\u7ea6(\u5220\u9664key-value),\u7eed\u7ea6(\u589e\u52a0TTL\u65f6\u95f4)\u7b49\u64cd\u4f5c.<\/li>\n<li><strong>Revision \u673a\u5236<\/strong>\uff1a\u6bcf\u4e2akey\u5e26\u6709\u4e00\u4e2a \u5168\u5c40\u552f\u4e00\u7684Revision \u53f7\uff0c\u6bcf\u4e00\u6b21\u4e8b\u52a1\u52a01\uff0c\u5b83\u662f\u5168\u5c40\u552f\u4e00\u7684\uff0c\u6240\u4ee5\u901a\u8fc7Revision\u53ef\u4ee5\u5224\u5b9a\u6570\u636e\u5199\u64cd\u4f5c\u7684\u987a\u5e8f,\u5bf9\u4e8e\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u548c\u961f\u5217\u975e\u5e38\u6709\u5e2e\u52a9.<\/li>\n<\/ul>\n<h2>\u4e09\u3001Leader\u9009\u4e3e\u4e0e\u5ba2\u6237\u7aef\u4ea4\u4e92<\/h2>\n<p>\u4f7f\u7528etcd\u7684\u65f6\u5019\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u9ad8\u53ef\u7528\uff0c\u901a\u5e38\u91c7\u7528\u96c6\u7fa4\u7684\u90e8\u7f72\u65b9\u5f0f\u3002\u90e8\u7f72\u5947\u6570\u4e2a\u8282\u70b9\uff0c\u901a\u5e38\u5efa\u8bae\u662f3\u4e2a\u62165\u4e2a\uff0c\u56e0\u4e3aetcd\u96c6\u7fa4\u4e4b\u95f4\u9700\u8981<strong>\u901a\u8fc7\u7f51\u7edc\u4ea4\u4e92\u4fdd\u8bc1\u914d\u7f6e\u4fe1\u606f\u7684\u4e00\u81f4\u6027<\/strong>\u3002\u5206\u5e03\u5f0f\u591a\u8282\u70b9\u4fdd\u8bc1\u4e86\u9ad8\u53ef\u7528\uff0c\u4f46\u662f\u8282\u70b9\u592a\u591a\u4e86\u4e5f\u4e0d\u597d\uff0c\u8d8a\u591a\u7684\u8282\u70b9\u7f51\u7edc\u6d88\u8017\u8d8a\u5927\u3002\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u662f\u5947\u6570\u4e2a\uff1f\u8fd9\u5c31\u6d89\u53ca\u5230Leader\u9009\u4e3e\u7684\u95ee\u9898\uff0c\u5947\u6570\u4e2a\u65b9\u4fbf\u6295\u7968\u51fa\u7ed3\u679c\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc16tC\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>etcd\u4f7f\u7528raft\u7b97\u6cd5\u4fdd\u8bc1\u96c6\u7fa4\u5185\u5404\u4e2a\u8282\u70b9\u4e4b\u95f4\u6570\u636e\u4e00\u81f4\u6027\u3002raft\u7b97\u6cd5\u5c06\u96c6\u7fa4\u5185\u7684\u8282\u70b9\u5206\u4e3aLeader, Follower, Candidate(\u5019\u9009\u4eba)\u8fd9\u4e09\u4e2a\u89d2\u8272\u3002<\/p>\n<ul>\n<li>\u96c6\u7fa4\u521d\u59cb\u5316\u7684\u65f6\u5019\uff0c\u6bcf\u4e2a\u8282\u70b9\u90fd\u662fFollower\u89d2\u8272\u3002\u901a\u8fc7raft\u7b97\u6cd5\u9009\u4e3e\u6295\u7968\uff0c\u9009\u51fa\u4e00\u4e2a\u8282\u70b9\u4f5c\u4e3aLeader\u3002<\/li>\n<li>Leader\u4f5c\u4e3a\u4e3b\u8282\u70b9\uff0c\u4e0e\u5176\u4ed6\u8282\u70b9\u7ef4\u6301\u5fc3\u8df3\uff0c\u5e76\u540c\u6b65\u6570\u636e\u81f3\u5176\u4ed6\u8282\u70b9\u3002<\/li>\n<li>\u5f53Follower\u4e00\u6bb5\u65f6\u95f4\u5185\u6ca1\u6709\u6536\u5230leader\u7684\u5fc3\u8df3\uff0c\u5c31\u4f1a\u5c06\u81ea\u5df1\u89d2\u8272\u6539\u4e3aCandidate\u5019\u9009\u8005\uff0c\u5e76\u53d1\u8d77\u4e00\u6b21\u65b0\u7684\u9009\u4e3e\uff0c\u9009\u4e3e\u65b0\u7684Leader\u3002<\/li>\n<\/ul>\n<p>\u5ba2\u6237\u7aef\u5728\u64cd\u4f5cetcd\u96c6\u7fa4\u6570\u636e\u7684\u65f6\u5019\uff1a<\/p>\n<ul>\n<li>\u8bfb\u64cd\u4f5c\uff1a\u5ba2\u6237\u7aef\u53ef\u4ee5\u8bbf\u95ee\u4efb\u610f\u8282\u70b9\u8fdb\u884c\u6570\u636e\u7684\u8bfb\u64cd\u4f5c<\/li>\n<li>\u5199\u64cd\u4f5c\uff1a\u5ba2\u6237\u7aef\u8bbf\u95ee\u4efb\u610f\u8282\u70b9\u8fdb\u884c\u5199\u64cd\u4f5c\uff0c\u5982\u679c\u8be5\u8282\u70b9\u662fFollower\uff0c\u5219\u5c06\u8bf7\u6c42\u8f6c\u53d1\u7ed9Leader\u3002\u7531Leader\u8d1f\u8d23\u6570\u636e\u7684\u5199\u64cd\u4f5c(\u589e\u5220\u6539)\uff0c\u5c06\u6570\u636e\u6301\u4e45\u5316\uff0c\u5e76\u5411Follower\u53d1\u9001\u540c\u6b65\u6570\u636e\u7684\u6d88\u606f\u3002<\/li>\n<\/ul>\n<h2>\u56db\u3001etcd\u7684\u5e94\u7528\u573a\u666f<\/h2>\n<h3>4.1. kubernetes\u5927\u8111<\/h3>\n<p>\u76ee\u524d\uff0cetcd\u7684\u6700\u5178\u578b\u7684\u5e94\u7528\u573a\u666f\u5c31\u662f\u4f5c\u4e3aKubernetes \u96c6\u7fa4\u7684\u5927\u8111\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc16tD\" alt=\"\" title=\"\" loading=\"lazy\"><br \/>\u5982\u679c\u628akubernetes\u6bd4\u4f5c\u4e00\u4e2a\u5927\u996d\u5e97\uff0c\u90a3\u4e48etcd\u5c31\u662f\u8fd9\u4e2a\u996d\u5e97\u7684\u8fdb\u9500\u5b58+\u5ba2\u6237\u5173\u7cfb\u7ba1\u7406\u7cfb\u7edf\u3002<\/p>\n<ul>\n<li>kubernetes\u4f5c\u4e3a\u5bb9\u5668\u7f16\u6392\u670d\u52a1\uff0c\u5c06\u9762\u5411\u5ba2\u6237\u63d0\u4f9b\u7684\u5404\u79cd\u670d\u52a1\u8fdb\u884c\u5408\u7406\u7684\u8d44\u6e90\u5206\u914d\uff0c\u670d\u52a1\u7f16\u6392\u3002<\/li>\n<li>\u4e0d\u53ef\u907f\u514d\u5730\uff0c\u6709\u4e00\u4e9bkubernetes\u96c6\u7fa4\u7684\u914d\u7f6e\u548c\u72b6\u6001\u6570\u636e\uff0c\u4f8b\u5982 pod \u7684\u6570\u91cf\u3001\u5b83\u4eec\u7684\u72b6\u6001\u3001\u547d\u540d\u7a7a\u95f4\u7b49\u3002\u9700\u8981\u6709\u4e00\u4e2a\u7edf\u4e00\u7684\u8bb0\u5f55\u3001\u7ba1\u7406\u7684\u5730\u65b9\uff0c\u5b83\u5c31\u662fetcd\u3002<\/li>\n<\/ul>\n<p>\u6700\u91cd\u8981\u7684\u662f\uff1a<strong>etcd\u5177\u5907watch\u76d1\u542c\u7684\u529f\u80fd\uff0c\u4e00\u65e6\u67d0\u4e2a\u914d\u7f6e\u6216\u8005\u67d0\u4e2a\u72b6\u6001\u53d1\u751f\u53d8\u66f4\uff0c\u96c6\u7fa4\u5185\u6240\u6709\u7684\u670d\u52a1\u5168\u90fd\u53ef\u4ee5\u901a\u8fc7watch\u76d1\u542c\u673a\u5236\u5b9e\u65f6\u83b7\u53d6\u5230\u6d88\u606f\uff0c\u8fdb\u800c\u505a\u51fa\u8fdb\u4e00\u6b65\u7684\u54cd\u5e94\u3002<\/strong>  \u51e0\u4e4eetcd\u7684\u6240\u6709\u5e94\u7528\u573a\u666f\uff0c\u90fd\u662f\u57fa\u4e8ewatch\u76d1\u542c\u673a\u5236\u4ea7\u751f\u7684\uff0c\u5305\u62ec\u6211\u4eec\u540e\u9762\u4e3a\u5927\u5bb6\u4ecb\u7ecd\u7684\u670d\u52a1\u6ce8\u518c\u53d1\u73b0\u548c\u8ba2\u9605\u901a\u77e5\u3002<\/p>\n<h3>4.2. \u670d\u52a1\u6ce8\u518c\u4e0e\u53d1\u73b0<\/h3>\n<p>\u5176\u5b9ekubernetes\u4e5f\u5229\u7528etcd\u5b9e\u73b0\u670d\u52a1\u6ce8\u518c\u53d1\u73b0\u673a\u5236\uff0c\u4f46\u662f\u4e0a\u9762\u7684\u90a3\u5f20\u56fe\u4e0d\u592a\u597d\u8bf4\u660e\uff0c\u6211\u65b0\u753b\u4e86\u4e24\u5f20\u56fe\u8bf4\u660eetcd\u5728\u5b9e\u73b0\u670d\u52a1\u6ce8\u518c\u53d1\u73b0\u673a\u5236\u4e2d\u7684\u4f5c\u7528\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc16tE\" alt=\"\" title=\"\" loading=\"lazy\"><br \/>\u6240\u8c13\u7684\u670d\u52a1\u6ce8\u518c\u5b9e\u73b0\u539f\u7406\u5c31\u662f\uff1a\u670d\u52a1\u5728\u542f\u52a8\u7684\u65f6\u5019\uff0c\u5411etcd\u5199\u5165\u4e00\u6761\u914d\u7f6e\u6570\u636e\uff0c\u8be5\u6761\u914d\u7f6e\u6570\u636e\u8bf4\u660e\u81ea\u5df1\u7684\u670d\u52a1\u540d\u79f0\uff0c\u670d\u52a1ip\u5730\u5740\uff0c\u670d\u52a1\u7aef\u53e3\u7b49\u4fe1\u606f\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc16tF\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u6240\u8c13\u7684\u670d\u52a1\u53d1\u73b0\u5b9e\u73b0\u539f\u7406\u4e3e\u4f8b\uff1a\u670d\u52a1C\u7684\u67d0\u4e2a\u5b9e\u4f8b\u5e0c\u671b\u8bbf\u95ee\u670d\u52a1A\uff0c\u670d\u52a1C\u5411etcd\u8be2\u95ee\u670d\u52a1A\u7684\u8bbf\u95ee\u5730\u5740\uff0cetcd\u54cd\u5e94\u7ed3\u679c\uff1a\u670d\u52a1A\u6709\u4e09\u4e2a\u5b9e\u4f8b\uff0c\u5730\u5740\u5217\u8868\u5982\uff1a<code>xxx.xxx.xxx.xxx:\u7aef\u53e3<\/code>\u3001<code>yyy.yyy.yyy.yyy:\u7aef\u53e3<\/code>\uff0c<code>zzz.zzz.zzz.zzz:\u7aef\u53e3<\/code>\u3002\u670d\u52a1C\u4e0d\u9700\u8981\u8bbf\u95ee\u4e09\u4e2a\u5b9e\u4f8b\uff0c\u8bbf\u95ee\u5176\u4e2d\u4e00\u4e2a\u5c31\u53ef\u4ee5\u5f97\u5230\u7ed3\u679c\uff0c\u6240\u4ee5\u5b83\u6309\u7167\u81ea\u5df1\u7684\u8d1f\u8f7d\u5747\u8861\u7b97\u6cd5\u9009\u4e86\u4e00\u4e2a\uff0c\u8fd9\u4e2a\u5c31\u53eb\u505a\uff1a\u5ba2\u6237\u7aef\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n<h3>4.3. \u5065\u5eb7\u68c0\u67e5\u4e0e\u72b6\u6001\u53d8\u66f4\u901a\u77e5<\/h3>\n<p>\u8854\u63a5\u4e0a\u6587\uff1a<strong>\u670d\u52a1C\u4e0b\u4e00\u6b21\u8bbf\u95ee\u670d\u52a1A\u7684\u65f6\u5019\uff0c\u8fd8\u9700\u8981\u8bbf\u95eeetcd\u4e48\uff1f\u7b54\u6848\u662f\u4e0d\u9700\u8981<\/strong>\uff0c\u5b83\u8bbf\u95ee\u8fc7\u4e00\u6b21\u4e4b\u540e\uff0c\u5c31\u4f1a\u81ea\u5df1\u7ef4\u62a4\u4e00\u4e2a\u670d\u52a1A\u8bbf\u95ee\u5730\u5740\u7684\u5217\u8868\uff0c<strong>\u9664\u975e\u8fd9\u4e2a\u5217\u8868\u53d1\u751f\u53d8\u5316\uff0c\u5426\u5219\u662f\u4e0d\u4f1a\u518d\u6b21\u53bb\u8be2\u95eeetcd\u7684\u3002<\/strong><br \/>\u90a3\u4e48\u4e00\u4e2a\u670d\u52a1\u600e\u4e48\u77e5\u9053\u53e6\u4e00\u4e2a\u670d\u52a1\u7684\u5217\u8868\u53d1\u751f\u53d8\u5316\u5462\uff1f\u6bd4\u5982\uff1a\u670d\u52a1A\u7684\u5b9e\u4f8b\u6ce8\u518c\u72b6\u6001\u53d1\u751f\u53d8\u5316\u3002\u53ef\u80fd\u662f\u7531\u4e8e\u67d0\u79cd\u539f\u56e0\u6302\u6389\u4e86\uff0c\u53ef\u80fd\u662fOOM\u6216\u8005\u662f\u7f51\u7edc\u95ee\u9898\u7b49\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc16tG\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<ul>\n<li>\u670d\u52a1\u5728\u6ce8\u518c\u5230etcd\u4e4b\u540e\uff0c\u4f1a\u4fdd\u5b58\u4e00\u4e2a\u5173\u4e8e\u8be5\u670d\u52a1\u7684\u6ce8\u518c\u914d\u7f6e\u4fe1\u606f\uff0c\u8be5\u6ce8\u518c\u914d\u7f6e\u4fe1\u606f\u7531\u4e00\u4e2aTTL\uff0cetcd\u540c\u65f6\u4f1a\u4e0e\u8be5\u670d\u52a1\u7ef4\u6301\u5fc3\u8df3\u3002\u4e00\u65e6\u8d85\u8fc7TTL\u65f6\u95f4\uff0c\u65e0\u6cd5\u5f97\u5230\u670d\u52a1\u7684\u5fc3\u8df3\u54cd\u5e94\uff0cetcd\u5c31\u8ba4\u4e3a\u8be5\u8282\u70b9\u7684\u5065\u5eb7\u72b6\u6001\u51fa\u73b0\u4e86\u95ee\u9898\uff0c\u5c31\u4f1a\u5c06\u8be5\u8282\u70b9\u4e0b\u7ebf\uff08\u6ce8\u518c\u914d\u7f6e\u4fe1\u606f\u5220\u9664\uff09\u3002<\/li>\n<li>\u670d\u52a1\u5728\u6ce8\u518c\u5230etcd\u4e4b\u540e\uff0c\u4f1a\u4fdd\u6301\u5bf9etcd\u72b6\u6001\u6570\u636e\u53d8\u66f4\u7684\u76d1\u542c\uff0c\u4e00\u65e6\u83b7\u53d6\u76d1\u542c\u7ed3\u679c\uff1a\u670d\u52a1A\u7684\u5b9e\u4f8b\u72b6\u6001\u53d1\u751f\u53d8\u66f4\uff0c\u8be5\u670d\u52a1\u5c31\u4f1a\u4eceetcd\u91cd\u65b0\u62c9\u53d6\u670d\u52a1A\u7684\u6ce8\u518c\u5217\u8868\u3002<\/li>\n<\/ul>\n<h3>4.4.\u5206\u5e03\u5f0f\u9501<\/h3>\n<p>\u8de8\u8fdb\u7a0b\u8de8\u7cfb\u7edf\u7684\u591a\u7ebf\u7a0b\u64cd\u4f5c\u516c\u5171\u8d44\u6e90\uff0c\u53d1\u751f\u591a\u7ebf\u7a0b\u7ade\u4e89\uff0c\u4e3a\u4e86\u907f\u514d\u7ebf\u7a0b\u4e0d\u5b89\u5168\uff0c\u9700\u8981\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u3002\u5982\u679c\u591a\u7ebf\u7a0b\u5728\u5355\u4e2a\u8fdb\u7a0b\u5185\u53d1\u751f\u8d44\u6e90\u7ade\u4e89\uff0c\u5c31\u662f\u7528Lock\u5c31\u53ef\u4ee5\u4e86\uff0c\u4e0d\u9700\u8981\u5206\u5e03\u5f0f\u9501\u3002\u6bd4\u5982\uff1a\u4f60\u5728mysql\u5e93\u91cc\u9762\u6709\u4e00\u4e2a\u7528\u6237\u4f59\u989d\u6570\u636e\uff0c\u591a\u4e2a\u8fdb\u7a0b\u5185\u7684\u7ebf\u7a0b\u540c\u65f6\u66f4\u6539\u8fd9\u4e2a\u503c\uff0c\u53ef\u80fd\u53d1\u751f\u5e76\u53d1\u7684\u6570\u636e\u8986\u76d6\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u591a\u4e2a\u8fdb\u7a0b\u6392\u6392\u961f\uff0cA\u5148\u6765\uff0cA\u91ca\u653e\u4e86\u9501B\u518d\u6765\uff0cB\u91ca\u653e\u4e86\u9501C\u518d\u6765\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc16tH\" alt=\"\" title=\"\" loading=\"lazy\"><br \/>\u4e3e\u4f8b\uff1a\u4e0a\u56fe\u76843\u4e2aclient\u4ee3\u8868\u4e09\u4e2a\u670d\u52a1\uff0c\u90fd\u8981\u64cd\u4f5c\u67d0\u4e2a\u8d44\u6e90\u6570\u636e\u3002<\/p>\n<ul>\n<li>\u5728\u5c1d\u8bd5\u8c03\u7528\u52a0\u9501API\u7684\u65f6\u5019\uff0cclient1\u83b7\u53d6\u5230\u7684revision=1,\u5b83\u4f18\u5148\u83b7\u5f97\u52a0\u9501\u7684\u8d44\u683c\u3002\u52a0\u9501\u5c31\u662f\u52a0\u4e00\u4e2a\u5e26\u6709revision\u7684\u914d\u7f6e\u8bb0\u5f55\u3002\u5176\u4ed6\u7684\u6240\u6709\u7684\u670d\u52a1\uff0c\u90fd\u901a\u8fc7watch\u673a\u5236\u76d1\u542c\u9501\u7684\u91ca\u653e\u3002<\/li>\n<li>client\u5728\u5c1d\u8bd5\u8c03\u7528\u52a0\u9501API\u7684\u65f6\u5019\uff0c\u88ab\u5206\u914d\u4e86revision\u3002\u5e76\u4e14\u6309\u7167revision\u8fdb\u884c\u4e86\u6392\u5e8f\uff0c\u76d1\u542c\u8ddd\u79bb\u81ea\u5df1revision\u5dee\u503c\u6700\u5c0f\uff0c\u800c\u4e14\u5c0f\u4e8e\u81ea\u5df1\u7684Revision\uff0c\u4e0d\u4f1a\u4ea7\u751f\u60ca\u7fa4\u6548\u5e94\u3002<\/li>\n<\/ul>\n<h3>4.5.\u5b9e\u73b0\u6d88\u606f\u961f\u5217(\u7eaf\u626f\u6de1)<\/h3>\n<p>\u6211\u89c9\u5f97\u4f7f\u7528etcd\u5b9e\u73b0\u6d88\u606f\u961f\u5217\uff0c\u662f\u4e00\u79cd\u7eaf\u626f\u6de1\u7684\u505a\u6cd5\u3002\u5982\u679c\u5927\u5bb6\u6709\u4ec0\u4e48\u5f02\u8bae\uff0c\u6b22\u8fce\u7559\u8a00\uff01<\/p>\n<p>\u4e0d\u662f\u8bf4\u505a\u4e0d\u4e86\uff0c\u786e\u5b9e\u5199\u4e2ademo\u662f\u53ef\u4ee5\u7684\u3002\u5f80etcd\u91cc\u9762\u653e\u6570\u636e\uff0c\u518d\u901a\u8fc7watch\u673a\u5236\u8fdb\u884c\u76d1\u542c\uff0c\u8fd9\u4e0d\u5c31\u662f\u4e00\u4e2a\u5178\u578b\u7684\u6d88\u606f\u961f\u5217\u4e48\uff1f\u626f\u6de1\uff01\u5982\u679c\u6211\u53ea\u4e3a\u4e86\u5b9e\u73b0\u6d88\u606f\u6570\u636e\u7684\u53d1\u5e03\u8ba2\u9605\uff0c\u5176\u5b9e\u6709\u5f88\u591a\u529e\u6cd5\uff0c\u6211\u8fd8\u7528\u642d\u4e00\u4e2aetcd\u96c6\u7fa4\uff1fSpring\u7684Event\u673a\u5236\uff0cjava\u7684\u54cd\u5e94\u5f0f\u7f16\u7a0b\uff0c\u54ea\u6015\u81ea\u5df1\u641e\u4e00\u4e2aBlockQueue\u5462\uff0c\u662f\u4e0d\u662f\u90fd\u80fd\u5b9e\u73b0\u6d88\u606f\u7684\u53d1\u5e03\u8ba2\u9605\u3002<\/p>\n<p>\u6211\u4eec\u4e4b\u6240\u4ee5\u4f7f\u7528kafka\u3001RocketMQ\u8fd9\u6837\u7684\u6d88\u606f\u961f\u5217\uff0c\u80af\u5b9a\u662f\u56e0\u4e3a\u6211\u4eec\u7684\u5f02\u6b65\u6570\u636e\u8fbe\u5230\u4e00\u5b9a\u7684\u89c4\u6a21\u4e86\u3002\u8fbe\u5230\u89c4\u6a21\u7684\u5f02\u6b65\u6d88\u606f\u6570\u636e\u4f20\u9012\u6839\u672c\u5c31\u4e0d\u662fetcd\u7684\u5e94\u7528\u573a\u666f\uff0c\u6b63\u5982\u672c\u6587\u5f00\u5934\u6240\u8ff0\uff1a\u522b\u5fd8\u4e86\u5b83\u53eb\u505aetc\u963f\u5c31d\uff0c<strong>\u5b83\u5c31\u662f\u4e00\u4e2a\u4e3a\u5206\u5e03\u5f0f\u7cfb\u7edf\u5b58\u50a8\u914d\u7f6e\u4fe1\u606f\u7684\uff0c\u4e0d\u662f\u6d88\u606f\u4e2d\u95f4\u4ef6\u3002<\/strong><\/p>\n<h2>\u4e94\u3001etcd\u5b89\u88c5<\/h2>\n<p>\u672c\u6587\u4e3a\u5927\u5bb6\u5b89\u88c5\u4e00\u4e2a\u53ef\u4ee5\u7528\u4e8e\u5b9e\u9a8c\u73af\u5883\u7684etcd\u5355\u673a\u7248,\u6211\u4eec\u53ef\u4ee5\u7528\u5b83\u8fdb\u884c\u5b9e\u9a8c,\u540e\u7eed\u6211\u8fd8\u4f1a\u5199\u6587\u7ae0\u4ecb\u7ecdetcd\u96c6\u7fa4\u7684\u5b89\u88c5\u65b9\u5f0f.<br \/>\u4e0b\u8f7detcd\u7684\u5b89\u88c5\u5305,\u8bbf\u95ee<a href=\"https:\/\/link.segmentfault.com\/?enc=xNGZzz7M%2Fs0qIkPVUFqySg%3D%3D.oiw5HEXzHBMNDOdGoc0tOcrMF9bNGS1wXbtoljWM5jXZUQRop%2FA1Ji2juzXj8R%2FM\" rel=\"nofollow\">github-etcd<\/a>,\u6211\u4f7f\u7528\u7684\u662flinux\u64cd\u4f5c\u7cfb\u7edf64\u4f4d,\u6240\u4ee5\u4e0b\u8f7d\u7684\u5b89\u88c5\u5305\u662f:etcd-v3.5.4-linux-amd64.tar.gz .\u5982\u679c\u7f51\u7edc\u6761\u4ef6\u4e0d\u5141\u8bb8,\u53ef\u4ee5\u641c\u7d22&#8221;etcd\u56fd\u5185\u4e0b\u8f7d\u52a0\u901f&#8221;,\u9009\u62e9\u5408\u9002\u7684\u4e0b\u8f7d\u5b89\u88c5\u5305\u8fdb\u884c\u5b89\u88c5\u5373\u53ef.<\/p>\n<p>\u9996\u5148\u5c06\u5b89\u88c5\u5305\u89e3\u538b,\u89e3\u538b\u4e4b\u540ecd\u8fdb\u5165\u5b89\u88c5\u76ee\u5f55,\u5c06etcd\u548cetcdctl\u4e24\u4e2a\u547d\u4ee4copy\u5230<code>\/usr\/local\/bin\/<\/code>\u76ee\u5f55\u4e0b\u9762.<\/p>\n<pre><code class=\"shell\">tar zxvf etcd-v3.5.4-linux-amd64.tar.gz;\ncd etcd-v3.5.4-linux-amd64;\ncp etcd etcdctl \/usr\/local\/bin\/;<\/code><\/pre>\n<p>\u901a\u8fc7<code>etcd --version<\/code>\u547d\u4ee4\u67e5\u770betcd\u7684\u7248\u672c,\u540c\u65f6\u53ef\u4ee5\u9a8c\u8bc1\u5b89\u88c5\u7ed3\u679c.\u5982\u679c\u4e0d\u60f3\u6572\u5168\u8def\u5f84,\u53ef\u4ee5\u628a<code>\/usr\/local\/bin<\/code>\u76ee\u5f55\u52a0\u5165\u7cfb\u7edf\u7684PATH\u73af\u5883\u53d8\u91cf.<\/p>\n<pre><code>\/usr\/local\/bin\/etcd --version<\/code><\/pre>\n<p>\u542f\u52a8etcd,\u8fd9\u91cc\u7684listen-client-urls\u548cadvertise-client-urls\u914d\u7f6e\u7684\u4f5c\u7528\u662f\u5141\u8bb8\u8fdc\u7a0b\u8fde\u63a5,<code>0.0.0.0<\/code>\u8868\u793a\u76d1\u542c\u5f53\u524d\u670d\u52a1\u5668\u7684\u6240\u6709ip, \u76d1\u542c\u7aef\u53e3\u662f2379.   \u5047\u5982\u4f60\u7684\u670d\u52a1\u5668\u6709\u591a\u5757\u7f51\u5361,\u591a\u4e2a\u56fa\u5b9aip,\u4f60\u60f3\u6307\u5b9aetcd\u670d\u52a1\u5728\u67d0\u4e00\u4e2aip\u4e0a\u63d0\u4f9b\u670d\u52a1,\u5c31\u53ef\u4ee5\u7528\u8fd9\u4e2aip\u66ff\u6362<code>0.0.0.0<\/code><\/p>\n<pre><code>\/usr\/local\/bin\/etcd  --listen-client-urls 'http:\/\/0.0.0.0:2379' --advertise-client-urls 'http:\/\/0.0.0.0:2379'<\/code><\/pre>\n<p>etcd\u542f\u52a8\u4e4b\u540e, \u53ef\u4ee5\u901a\u8fc7etcdctl\u547d\u4ee4\u5411etcd\u4e2d\u6dfb\u52a0\u914d\u7f6e,\u5982\u4e0b\u6240\u793a\u4f7f\u7528put\u547d\u4ee4\u6dfb\u52a0\u4e00\u4e2a<code>key=\/dir1<\/code>,<code>value=aaa<\/code>\u7684\u952e\u503c\u5bf9\u6570\u636e.\u53ef\u4ee5\u4f7f\u7528get\u547d\u4ee4\u83b7\u53d6\u8be5\u914d\u7f6e\u4fe1\u606f.<\/p>\n<pre><code># \/usr\/local\/bin\/etcdctl put \/dir1 aaa\nOK\n# \/usr\/local\/bin\/etcdctl get \/dir1\n\/dir1\naaa<\/code><\/pre>\n<h2>\u516d\u3001jetcd\u7684\u7f16\u7801\u5b9e\u73b0\u914d\u7f6e\u7ba1\u7406<\/h2>\n<p>\u4e0b\u9762\u4e3a\u5927\u5bb6\u4ecb\u7ecd\u901a\u8fc7java API\u7684\u65b9\u5f0f\u64cd\u4f5cetcd\u7684\u6570\u636e,\u9996\u5148\u901a\u8fc7maven\u7684\u5750\u6807\u5f15\u5165jetcd.\u6211\u4f7f\u7528\u7684\u7248\u672c\u76f8\u5bf9\u6bd4\u8f83\u65e7,\u6700\u65b0\u7684\u7248\u672c\u5df2\u7ecf\u662f0.7.8,\u4e0d\u8fc7\u6211\u5728\u4f7f\u7528\u7684\u65f6\u5019\u51fa\u73b0\u4e86\u4e0enetty\u7248\u672c\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5,\u62a5\u9519:\u627e\u4e0d\u5230netty\u76f8\u5173\u7684\u4e00\u4e9b\u7c7b.\u6240\u4ee5\u6211\u5c31\u56de\u9000\u52300.3.0\u7248\u672c,\u4f7f\u7528\u65b9\u5f0f\u4e0a\u90fd\u662f\u4e00\u6837\u7684.<\/p>\n<pre><code class=\"xml\">&lt;dependency&gt;\n    &lt;groupId&gt;io.etcd&lt;\/groupId&gt;\n    &lt;artifactId&gt;jetcd-core&lt;\/artifactId&gt;\n    &lt;version&gt;0.3.0&lt;\/version&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n<p>\u4e0b\u9762\u7684\u4ee3\u7801\u662f\u4f7f\u7528jetcd\u64cd\u4f5cetcd\u7684\u914d\u7f6e\u6570\u636e,\u5b9e\u73b0\u4e86\u6570\u636e\u7684\u5199\u64cd\u4f5c,\u8bfb\u64cd\u4f5c,\u5220\u9664\u64cd\u4f5c.\u8be6\u7ec6\u7528\u6cd5\u770b\u4ee3\u7801\u5427.\u4e0b\u9762\u7684\u4ee3\u7801\u662fJunit 5\u7684\u5355\u5143\u6d4b\u8bd5\u7528\u4f8b\u7684\u5199\u6cd5.<\/p>\n<pre><code class=\"java\">import io.etcd.jetcd.ByteSequence;\nimport io.etcd.jetcd.Client;\nimport io.etcd.jetcd.KV;\nimport io.etcd.jetcd.kv.GetResponse;\nimport io.etcd.jetcd.kv.PutResponse;\nimport org.junit.jupiter.api.*;\n\nimport java.nio.charset.StandardCharsets;\nimport java.util.concurrent.CompletableFuture;\nimport java.util.concurrent.ExecutionException;\n\nimport static junit.framework.TestCase.assertNotNull;\n\n\/\/\u8fd9\u4e2a\u6ce8\u89e3\u914d\u5408\u51fd\u6570\u7684Order\u6ce8\u89e3,\u51b3\u5b9a\u6d4b\u8bd5\u7528\u4f8b\u51fd\u6570\u7684\u6267\u884c\u987a\u5e8f\n@TestMethodOrder(MethodOrderer.OrderAnnotation.class)\npublic class EtcdTest {\n  private static Client etcdClient;\n\n  @BeforeAll\n  static void  init(){\n    etcdClient = Client.builder()\n             \/\/\u8fd9\u91cc\u7684etcd\u670d\u52a1\u5217\u8868\u53ef\u4ee5\u5199\u591a\u4e2a,\u7528\u9017\u53f7\u5206\u9694\n            .endpoints(&quot;http:\/\/192.168.161.3:2379&quot;.split(&quot;,&quot;))\n            .build();\n  }\n\n  @Test\n  @Order(1)\n  @DisplayName(&quot;etcd\u5199\u914d\u7f6e\u64cd\u4f5c&quot;)\n  void putKV() throws ExecutionException, InterruptedException {\n    KV kv = etcdClient.getKVClient();\n    ByteSequence key = ByteSequence.from(&quot;key-str&quot;, StandardCharsets.UTF_8);\n    ByteSequence value = ByteSequence.from(&quot;value-str&quot;, StandardCharsets.UTF_8);\n    \/\/put key-value\u914d\u7f6e\u4fe1\u606f\n    CompletableFuture&lt;PutResponse&gt; putRsp = kv.put(key,value);\n    assertNotNull(putRsp.get().getHeader());\n  }\n\n\n  @Test\n  @Order(2)\n  @DisplayName(&quot;etcd\u8bfb\u914d\u7f6e\u64cd\u4f5c&quot;)\n  void getKV() throws ExecutionException, InterruptedException {\n    KV kv = etcdClient.getKVClient();\n    ByteSequence key = ByteSequence.from(&quot;key-str&quot;, StandardCharsets.UTF_8);\n    \/\/\u901a\u8fc7key\u83b7\u53d6\u503c\n    CompletableFuture&lt;GetResponse&gt; getRsp = kv.get(key);\n    String getBackValue = getRsp.get().getKvs().get(0).getValue().toString(StandardCharsets.UTF_8);\n    System.out.println(&quot;\u4eceetcd\u901a\u8fc7key\u83b7\u53d6value\u503c\u4e3a\uff1a&quot; + getBackValue);\n  }\n\n\n  @Test\n  @Order(3)\n  @DisplayName(&quot;\u5220\u9664\u914d\u7f6e\u64cd\u4f5c&quot;)\n  void deleteKV() {\n    KV kv = etcdClient.getKVClient();\n    ByteSequence key = ByteSequence.from(&quot;key-str&quot;, StandardCharsets.UTF_8);\n    \/\/\u901a\u8fc7key\u5220\u9664\u6570\u636e\n    kv.delete(key);\n  }\n}\n<\/code><\/pre>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u53ea\u4ecb\u7ecd\u4e86etcd\u7684\u6700\u57fa\u672c\u7684key-value\u64cd\u4f5c,\u5176\u5b9eetcd\u5ba2\u6237\u7aef\u8fd8\u63d0\u4f9b\u4e86\u5f88\u591a\u7684API,\u8fd9\u4e9b\u90fd\u5c06\u5728\u6211\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\u5206\u5e03\u5f0f\u9501,\u670d\u52a1\u6ce8\u518c\u53d1\u73b0,\u914d\u7f6e\u53d8\u66f4\u76d1\u542c,\u5206\u5e03\u5f0f\u7cfb\u7edfLeader\u9009\u4e3e\u7684\u5185\u5bb9\u4e2d\u4e3a\u5927\u5bb6\u4ecb\u7ecd.<\/p>\n<pre><code class=\"java\">\/\/\u79df\u7ea6\nLease lease=etcdClient.getLeaseClient();\n\/\/\u76d1\u542c\nWatch watch =etcdClient.getWatchClient();\n\/\/\u9009\u4e3e\nElection election =etcdClient.getElectionClient();\n\/\/\u9501\nLock lock=etcdClient.getLockClient();<\/code><\/pre>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u516c\u544a\u53f7\uff1a\u5b57\u6bcd\u54e5\u6742\u8c08\uff0c\u56de\u590d003\u8d60\u9001\u4f5c\u8005\u4e13\u680f\u300adocker\u4fee\u70bc\u4e4b\u9053\u300b\u7684PDF\u7248\u672c\uff0c30\u4f59\u7bc7\u7cbe\u54c1docker\u6587\u7ae0\u3002\u5b57\u6bcd\u54e5\u535a\u5ba2\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=o4SbVymTNKGZ1CMNY88swQ%3D%3D.Vx07F01afpeKwjxqjn1chyF3fE4LiQIfqCFhhss%2FIig%3D\" rel=\"nofollow\">zimug.com<\/a><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042408220\">https:\/\/segmentfault.com\/a\/1190000042408220<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5927\u5bb6\u597d\u554a\uff0c\u6211\u662f\u5b57\u6bcd\u54e5\uff0c\u4eca\u5929\u5199\u4e00\u7bc7\u5173\u4e8eetcd\u7684\u6587\u7ae0\uff0c\u5176\u5b9e\u7f51\u4e0a\u4e5f\u6709\u5f88\u591a\u5173\u4e8eetcd\u7684\u4ecb\u7ecd\uff0c\u6211\u5c31\u7b80\u660e\u627c\u8981\uff0c\u603b\u7ed3\u63d0\u70bc [&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-10006360","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\/10006360","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=10006360"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006360\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}