{"id":1921,"date":"2020-07-22T17:31:57","date_gmt":"2020-07-22T09:31:57","guid":{"rendered":"http:\/\/blog.ywdevops.cn\/?p=1921"},"modified":"2022-12-12T11:18:10","modified_gmt":"2022-12-12T03:18:10","slug":"kubernetes","status":"publish","type":"post","link":"https:\/\/blog.ywdevops.cn\/index.php\/2020\/07\/22\/kubernetes\/","title":{"rendered":"Kubernetes\u662f\u4ec0\u4e48"},"content":{"rendered":"\n

\u9996\u5148\uff0c\u5b83\u662f\u4e00\u4e2a\u5168\u65b0\u7684\u57fa\u4e8e\u5bb9\u5668\u6280\u672f\u7684\u5206\u5e03\u5f0f\u67b6\u6784\u9886\u5148\u65b9\u6848\u3002\u8fd9\u4e2a\u65b9\u6848\u867d\u7136\u8fd8\u5f88\u65b0\uff0c \u4f46\u5b83\u662f\u8c37\u6b4c\u5341\u51e0\u5e74\u4ee5\u6765\u5927\u89c4\u6a21\u5e94\u7528\u5bb9\u5668\u6280\u672f\u7684\u7ecf\u9a8c\u79ef\u7d2f\u548c\u5347\u534e\u7684\u91cd\u8981\u6210\u679c\u3002\u786e\u5207\u5730\u8bf4\uff0cKubernetes\u662f\u8c37\u6b4c\u4e25\u683c\u4fdd\u5bc6\u5341\u51e0\u5e74\u7684\u79d8\u5bc6\u6b66\u5668\u2014 Borg\u7684\u4e00\u4e2a\u5f00\u6e90\u7248\u672c\u3002<\/p>\n\n\n\n

Kubernetes\u662f\u4e00\u4e2a\u5f00\u653e\u7684\u5f00\u53d1\u5e73\u53f0\u3002\u4e0eJ2EE\u4e0d\u540c\uff0c\u5b83\u4e0d\u5c40\u9650\u4e8e\u4efb\u4f55\u4e00\u79cd\u8bed\u8a00\uff0c \u6ca1\u6709\u9650\u5b9a\u4efb\u4f55\u7f16\u7a0b\u63a5\u53e3\uff0c\u6240\u4ee5\u4e0d\u8bba\u662f\u7528Java\u3001Go\u3001C++\u8fd8\u662f\u7528Python\u7f16\u5199\u7684\u670d\u52a1\uff0c\u90fd\u53ef\u4ee5\u88ab\u6620\u5c04\u4e3aKubernetes\u7684Service\uff08\u670d\u52a1\uff09\uff0c\u5e76\u901a\u8fc7\u6807\u51c6\u7684TCP\u901a\u4fe1\u534f\u8bae\u8fdb\u884c\u4ea4\u4e92\u3002\u6b64\u5916\uff0cKubernetes\u5e73\u53f0\u5bf9\u73b0\u6709\u7684\u7f16\u7a0b\u8bed\u8a00\u3001\u7f16\u7a0b\u6846\u67b6\u3001\u4e2d\u95f4\u4ef6\u6ca1\u6709\u4efb\u4f55\u4fb5\u5165\u6027\uff0c\u56e0\u6b64\u73b0\u6709\u7684\u7cfb\u7edf\u4e5f\u5f88\u5bb9\u6613\u6539\u9020\u5347\u7ea7\u5e76\u8fc1\u79fb\u5230Kubernetes\u5e73\u53f0\u4e0a\u3002<\/p>\n\n\n\n

Kubernetes\u662f\u4e00\u4e2a\u5b8c\u5907\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u652f\u6491\u5e73\u53f0\u3002Kubernetes\u5177\u6709\u5b8c\u5907\u7684\u96c6\u7fa4\u7ba1\u7406\u80fd\u529b\uff0c\u5305\u62ec\u591a\u5c42\u6b21\u7684\u5b89\u5168\u9632\u62a4\u548c\u51c6\u5165\u673a\u5236\u3001\u591a\u79df\u6237\u5e94\u7528\u652f\u6491\u80fd\u529b\u3001\u900f\u660e\u7684\u670d\u52a1\u6ce8\u518c\u548c\u670d\u52a1\u53d1\u73b0\u673a\u5236\u3001\u5185\u5efa\u7684\u667a\u80fd\u8d1f\u8f7d\u5747\u8861\u5668\u3001\u5f3a\u5927\u7684\u6545\u969c\u53d1\u73b0\u548c\u81ea\u6211\u4fee\u590d\u80fd\u529b\u3001\u670d\u52a1\u6eda\u52a8\u5347\u7ea7\u548c\u5728\u7ebf\u6269\u5bb9\u80fd\u529b\u3001\u53ef\u6269\u5c55\u7684\u8d44\u6e90\u81ea\u52a8\u8c03\u5ea6\u673a\u5236\uff0c\u4ee5\u53ca\u591a\u7c92\u5ea6\u7684\u8d44\u6e90\u914d\u989d\u7ba1\u7406\u80fd\u529b\u3002\u540c\u65f6\uff0cKubernetes\u63d0\u4f9b\u4e86\u5b8c\u5584\u7684\u7ba1\u7406\u5de5\u5177\uff0c\u8fd9\u4e9b\u5de5\u5177\u6db5\u76d6\u4e86\u5305\u62ec\u5f00\u53d1\u3001\u90e8\u7f72\u6d4b\u8bd5\u3001\u8fd0\u7ef4\u76d1\u63a7\u5728\u5185\u7684 \u5404\u4e2a\u73af\u8282\u3002\u56e0\u6b64\uff0cKubernetes\u662f\u4e00\u4e2a\u5168\u65b0\u7684\u57fa\u4e8e\u5bb9\u5668\u6280\u672f\u7684\u5206\u5e03\u5f0f\u67b6\u6784\u89e3\u51b3\u65b9\u6848\uff0c\u5e76\u4e14\u662f \u4e00\u4e2a\u4e00\u7ad9\u5f0f\u7684\u5b8c\u5907\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u5f00\u53d1\u548c\u652f\u6491\u5e73\u53f0\u3002<\/p>\n\n\n\n

\u5728Kubernetes\u4e2d\uff0cService\u662f\u5206\u5e03\u5f0f\u96c6\u7fa4\u67b6\u6784\u7684\u6838\u5fc3\uff0c\u4e00\u4e2aService\u5bf9\u8c61\u62e5\u6709\u5982\u4e0b\u5173\u952e\u7279\u5f81:<\/p>\n\n\n\n

  1. \u62e5\u6709\u552f\u4e00\u6307\u5b9a\u7684\u540d\u79f0\uff08\u6bd4\u5982mysql-server\uff09\u3002<\/li>
  2. \u62e5\u6709\u4e00\u4e2a\u865a\u62dfIP\uff08Cluster IP\u3001Service IP\u6216VIP\uff09\u548c\u7aef\u53e3\u53f7\u3002<\/li>
  3. \u80fd\u591f\u63d0\u4f9b\u67d0\u79cd\u8fdc\u7a0b\u670d\u52a1\u80fd\u529b\u3002<\/li>
  4. \u88ab\u6620\u5c04\u5230\u63d0\u4f9b\u8fd9\u79cd\u670d\u52a1\u80fd\u529b\u7684\u4e00\u7ec4\u5bb9\u5668\u5e94\u7528\u4e0a\u3002<\/li><\/ol>\n\n\n\n

    Service\u7684\u670d\u52a1\u8fdb\u7a0b\u76ee\u524d\u90fd\u57fa\u4e8eSocket\u901a\u4fe1\u65b9\u5f0f\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\uff0c\u6bd4\u5982Redis\u3001Memcache \u3001MySQL\u3001Web Server\uff0c\u6216\u8005\u662f\u5b9e\u73b0\u4e86\u67d0\u4e2a\u5177\u4f53\u4e1a\u52a1\u7684\u7279\u5b9aTCP Server\u8fdb\u7a0b\u3002<\/p>\n\n\n\n

    \u867d\u7136\u4e00\u4e2aService\u901a\u5e38\u7531\u591a\u4e2a\u76f8\u5173\u7684\u670d\u52a1\u8fdb\u7a0b\u63d0\u4f9b\u670d\u52a1\uff0c\u6bcf\u4e2a\u670d\u52a1\u8fdb\u7a0b\u90fd\u6709\u4e00 \u4e2a\u72ec\u7acb\u7684Endpoint\uff08IP+Port\uff09\u8bbf\u95ee\u70b9\uff0c\u4f46Kubernetes\u80fd\u591f\u8ba9\u6211\u4eec\u901a\u8fc7Service\uff08\u865a\u62dfCluster IP +Service Port\uff09\u8fde\u63a5\u5230\u6307\u5b9a\u7684Service\u3002 \u6709\u4e86Kubernetes\u5185\u5efa\u7684\u900f\u660e\u8d1f\u8f7d\u5747\u8861\u548c\u6545\u969c\u6062\u590d\u673a\u5236\uff0c\u4e0d\u7ba1\u540e\u7aef\u6709\u591a\u5c11\u670d\u52a1\u8fdb\u7a0b\uff0c\u4e5f\u4e0d\u7ba1\u67d0\u4e2a\u670d\u52a1\u8fdb\u7a0b\u662f\u5426\u7531\u4e8e\u53d1\u751f\u6545\u969c\u800c\u88ab\u91cd\u65b0\u90e8\u7f72\u5230\u5176\u4ed6\u673a\u5668\uff0c \u90fd\u4e0d\u4f1a\u5f71\u54cd\u5bf9\u670d\u52a1\u7684\u6b63\u5e38\u8c03\u7528\u3002\u66f4\u91cd\u8981\u7684\u662f\uff0c\u8fd9\u4e2aService\u672c\u8eab\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u518d\u53d8\u5316\uff0c\u8fd9\u610f\u5473\u7740\u6211\u4eec\u518d\u4e5f\u4e0d\u7528\u4e3aKubernetes\u96c6\u7fa4\u4e2d\u670d\u52a1\u7684IP\u5730\u5740\u53d8\u6765\u53d8\u53bb\u7684\u95ee\u9898\u800c\u5934\u75bc\u4e86\u3002<\/p>\n\n\n\n

    \u5bb9\u5668\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u9694\u79bb\u529f\u80fd\uff0c\u6240\u4ee5\u6709\u5fc5\u8981\u628a\u4e3aService\u63d0\u4f9b\u670d\u52a1\u7684\u8fd9\u7ec4\u8fdb\u7a0b\u653e\u5165\u5bb9\u5668\u4e2d\u8fdb\u884c\u9694\u79bb\u3002\u4e3a\u6b64\uff0cKubernetes\u8bbe\u8ba1\u4e86Pod\u5bf9\u8c61\uff0c\u5c06\u6bcf\u4e2a\u670d\u52a1\u8fdb\u7a0b\u90fd\u5305\u88c5\u5230\u76f8\u5e94\u7684Pod\u4e2d\uff0c\u4f7f\u5176\u6210\u4e3a\u5728Pod\u4e2d\u8fd0\u884c\u7684\u4e00\u4e2a\u5bb9\u5668\uff08Container\uff09\u3002 \u4e3a\u4e86\u5efa\u7acbService\u548cPod\u95f4\u7684\u5173\u8054\u5173\u7cfb\uff0cKub ernetes\u9996\u5148\u7ed9\u6bcf\u4e2aPod\u90fd\u8d34\u4e0a\u4e00\u4e2a\u6807\u7b7e\uff08Label\uff09\uff0c\u7ed9\u8fd0\u884cMySQL\u7684Pod\u8d34\u4e0aname=mysql\u6807 \u7b7e\uff0c\u7ed9\u8fd0\u884cPHP\u7684Pod\u8d34\u4e0aname=php\u6807\u7b7e\uff0c\u7136\u540e\u7ed9\u76f8\u5e94\u7684Service\u5b9a\u4e49\u6807\u7b7e\u9009\u62e9\u5668\uff08Label Selector\uff09\uff0c\u6bd4\u5982MySQL Service\u7684\u6807\u7b7e\u9009\u62e9\u5668\u7684\u9009\u62e9\u6761\u4ef6\u4e3aname=mysql\uff0c\u610f\u4e3a\u8be5Service\u8981\u4f5c\u7528\u4e8e\u6240\u6709\u5305\u542bname=mysql Label\u7684Pod\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u5c31\u5de7\u5999\u89e3\u51b3\u4e86Service\u4e0ePod\u7684\u5173\u8054\u95ee\u9898\u3002<\/p>\n\n\n\n

    \u5148\u7b80\u5355\u4ecb\u7ecdPod<\/strong>\u7684\u6982\u5ff5\u3002\u9996\u5148\uff0cPod\u8fd0\u884c\u5728\u4e00\u4e2a\u88ab\u79f0\u4e3a\u8282\u70b9\uff08Node\uff09\u7684\u73af\u5883\u4e2d\uff0c \u8fd9\u4e2a\u8282\u70b9\u65e2\u53ef\u4ee5\u662f\u7269\u7406\u673a\uff0c\u4e5f\u53ef\u4ee5\u662f\u79c1\u6709\u4e91\u6216\u8005\u516c\u6709\u4e91\u4e2d\u7684\u4e00\u4e2a\u865a\u62df\u673a\uff0c\u901a\u5e38\u5728\u4e00\u4e2a\u8282\u70b9 \u4e0a\u8fd0\u884c\u51e0\u767e\u4e2aPod\uff1b\u5176\u6b21\uff0c\u5728\u6bcf\u4e2aPod\u4e2d\u90fd\u8fd0\u884c\u7740\u4e00\u4e2a\u7279\u6b8a\u7684\u88ab\u79f0\u4e3aPause\u7684\u5bb9\u5668\uff0c\u5176\u4ed6\u5bb9\u5668\u5219\u4e3a\u4e1a\u52a1\u5bb9\u5668\uff0c\u8fd9\u4e9b\u4e1a\u52a1\u5bb9\u5668\u5171\u4eabPause\u5bb9\u5668\u7684\u7f51\u7edc\u6808\u548cVolume\u6302\u8f7d\u5377\uff0c\u56e0\u6b64\u5b83\u4eec\u4e4b\u95f4\u7684\u901a\u4fe1\u548c\u6570\u636e\u4ea4\u6362\u66f4\u4e3a\u9ad8\u6548\uff0c\u5728\u8bbe\u8ba1\u65f6\u6211\u4eec\u53ef\u4ee5\u5145\u5206\u5229\u7528\u8fd9\u4e00\u7279\u6027\u5c06\u4e00\u7ec4\u5bc6\u5207\u76f8\u5173\u7684\u670d\u52a1\u8fdb\u7a0b\u653e\u5165\u540c\u4e00\u4e2aPod\u4e2d, \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5e76\u4e0d\u662f\u6bcf\u4e2aPod\u548c\u5b83\u91cc\u9762\u8fd0\u884c\u7684\u5bb9\u5668\u90fd\u80fd\u88ab\u6620\u5c04\u5230\u4e00\u4e2aService\u4e0a\uff0c\u53ea\u6709\u63d0\u4f9b\u670d\u52a1(\u65e0\u8bba\u662f\u5bf9\u5185\u8fd8\u662f\u5bf9\u5916)\u7684\u90a3\u7ec4Pod\u624d\u4f1a\u88ab\u6620\u5c04\u4e3a \u4e00\u4e2a\u670d\u52a1\u3002<\/p>

    \u5728\u96c6\u7fa4\u7ba1\u7406\u65b9\u9762\uff0cKubernetes\u5c06\u96c6\u7fa4\u4e2d\u7684\u673a\u5668\u5212\u5206\u4e3a\u4e00\u4e2aMaster\u548c\u4e00\u4e9bNode\u3002\u5728Master\u4e0a\u8fd0\u884c\u7740\u96c6\u7fa4\u7ba1\u7406\u76f8\u5173\u7684\u4e00\u7ec4\u8fdb\u7a0bkube-apiserver\u3001kube-controllermanager\u548ckubescheduler\uff0c\u8fd9\u4e9b\u8fdb\u7a0b\u5b9e\u73b0\u4e86\u6574\u4e2a\u96c6\u7fa4\u7684\u8d44\u6e90\u7ba1\u7406\u3001Pod\u8c03\u5ea6\u3001\u5f39\u6027\u4f38\u7f29\u3001\u5b89\u5168\u63a7\u5236\u3001\u7cfb\u7edf\u76d1\u63a7\u548c\u7ea0\u9519\u7b49\u7ba1\u7406\u529f\u80fd\uff0c\u5e76\u4e14\u90fd\u662f\u81ea\u52a8\u5b8c\u6210\u7684\u3002Node\u4f5c\u4e3a\u96c6\u7fa4\u4e2d\u7684\u5de5\u4f5c\u8282\u70b9\uff0c\u8fd0\u884c\u771f\u6b63\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u5728Node\u4e0aKubernetes\u7ba1\u7406\u7684\u6700\u5c0f\u8fd0\u884c\u5355\u5143\u662fPod\u3002\u5728Node\u4e0a\u8fd0\u884c\u7740Kubernetes\u7684kubelet\u3001kubeproxy\u670d\u52a1\u8fdb\u7a0b\uff0c\u8fd9\u4e9b\u670d\u52a1\u8fdb\u7a0b\u8d1f\u8d23Pod\u7684\u521b\u5efa\u3001\u542f\u52a8\u3001\u76d1\u63a7\u3001\u91cd\u542f\u3001\u9500\u6bc1\uff0c\u4ee5\u53ca\u5b9e\u73b0\u8f6f\u4ef6\u6a21\u5f0f\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u3002<\/p>

    \u5728Kubernetes\u96c6\u7fa4\u4e2d\uff0c\u53ea\u9700\u4e3a\u9700\u8981\u6269\u5bb9\u7684Service\u5173\u8054\u7684Pod\u521b\u5efa\u4e00\u4e2aRC\uff08ReplicationController\uff09\uff0c\u670d\u52a1\u6269\u5bb9\u4ee5\u81f3\u670d\u52a1\u5347\u7ea7\u7b49\u4ee4\u4eba\u5934\u75bc\u7684\u95ee\u9898\u90fd\u8fce\u5203\u800c\u89e3\u3002\u5728\u4e00\u4e2aRC\u5b9a\u4e49\u6587\u4ef6\u4e2d\u5305\u62ec\u4ee5\u4e0b3\u4e2a\u5173\u952e\u4fe1\u606f\u3002 <\/span><\/p>

    1. \u76ee\u6807Pod\u7684\u5b9a\u4e49\u3002<\/li>
    2. \u76ee\u6807Pod\u9700\u8981\u8fd0\u884c\u7684\u526f\u672c\u6570\u91cf\uff08Replicas\uff09\u3002<\/li>
    3. \u8981\u76d1\u63a7\u7684\u76ee\u6807Pod\u7684\u6807\u7b7e\u3002\u00a0<\/li><\/ol>

      \u5728\u521b\u5efa\u597dRC\uff08\u7cfb\u7edf\u5c06\u81ea\u52a8\u521b\u5efa\u597dPod\uff09\u540e\uff0cKubernetes\u4f1a\u901a\u8fc7\u5728RC\u4e2d\u5b9a\u4e49\u7684Label\u7b5b\u9009\u51fa\u5bf9\u5e94\u7684Pod\u5b9e\u4f8b\u5e76\u5b9e\u65f6\u76d1\u63a7\u5176\u72b6\u6001\u548c\u6570\u91cf\uff0c\u5982\u679c\u5b9e\u4f8b\u6570\u91cf\u5c11\u4e8e\u5b9a\u4e49\u7684\u526f\u672c\u6570\u91cf\uff0c\u5219\u4f1a\u6839\u636e\u5728RC\u4e2d\u5b9a\u4e49\u7684Pod\u6a21\u677f\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Pod\uff0c\u7136\u540e\u5c06\u6b64Pod\u8c03\u5ea6\u5230\u5408\u9002\u7684Node\u4e0a\u542f\u52a8\u8fd0\u884c\uff0c\u76f4\u5230Pod\u5b9e\u4f8b\u7684\u6570\u91cf\u8fbe\u5230\u9884\u5b9a\u76ee\u6807\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5b8c\u5168\u662f\u81ea\u52a8\u5316\u7684\uff0c\u65e0\u987b\u4eba\u5de5\u5e72\u9884\u3002\u6709\u4e86RC\uff0c\u670d\u52a1\u6269\u5bb9\u5c31\u53d8\u6210\u4e00\u4e2a\u7eaf\u7cb9\u7684\u7b80\u5355\u6570\u5b57\u6e38\u620f\u4e86\uff0c\u53ea\u9700\u4fee\u6539RC\u4e2d\u7684\u526f\u672c\u6570\u91cf\u5373\u53ef\u3002\u540e\u7eed\u7684\u670d\u52a1\u5347\u7ea7\u4e5f\u5c06\u901a\u8fc7\u4fee\u6539RC\u6765\u81ea\u52a8\u5b8c\u6210\u3002<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

      \u9996\u5148\uff0c\u5b83\u662f\u4e00\u4e2a\u5168\u65b0\u7684\u57fa\u4e8e\u5bb9\u5668\u6280\u672f\u7684\u5206\u5e03\u5f0f\u67b6\u6784\u9886\u5148\u65b9\u6848\u3002\u8fd9\u4e2a\u65b9\u6848\u867d\u7136\u8fd8\u5f88\u65b0\uff0c \u4f46\u5b83\u662f\u8c37\u6b4c\u5341\u51e0\u5e74\u4ee5\u6765\u5927\u89c4\u6a21\u5e94\u7528\u5bb9\u5668 […]<\/p>\n","protected":false},"author":3,"featured_media":1926,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[93,23],"tags":[],"class_list":["post-1921","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kubernetes","category-rong"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"_links":{"self":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1921","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1921"}],"version-history":[{"count":13,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1921\/revisions"}],"predecessor-version":[{"id":10924,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1921\/revisions\/10924"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media\/1926"}],"wp:attachment":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1921"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1921"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}