{"id":223967,"date":"2022-12-17T14:06:10","date_gmt":"2022-12-17T06:06:10","guid":{"rendered":"https:\/\/www.idc.net\/help\/223967\/"},"modified":"2022-12-17T14:06:10","modified_gmt":"2022-12-17T06:06:10","slug":"%e5%9c%a8kubernetes%e4%b8%ad%e9%83%a8%e7%bd%b2%e9%ab%98%e5%8f%af%e7%94%a8%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e7%9a%84%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/223967\/","title":{"rendered":"\u5728Kubernetes\u4e2d\u90e8\u7f72\u9ad8\u53ef\u7528\u5e94\u7528\u7a0b\u5e8f\u7684\u5b9e\u8df5"},"content":{"rendered":"<h1>\u5728Kubernetes\u4e2d\u90e8\u7f72\u9ad8\u53ef\u7528\u5e94\u7528\u7a0b\u5e8f\u7684\u5b9e\u8df5<\/h1>\n<p><span>\u4f5c\u8005\uff1a\u795d\u7965 <\/span> 2021-11-02 17:27:40<br \/>\n<i><\/i><br \/>\n<span>\u4e91\u8ba1\u7b97<\/span> Kubernetes 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Pod\u3002\u5982\u679c\u60a8\u7684\u5e94\u7528\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u4e14\u5728\u8fd0\u884c\u5220\u9664\u7684\u8282\u70b9\u4e0a\uff0c\u6b64\u65f6\uff0c\u60a8\u53ef\u80fd\u4f1a\u53d1\u73b0\u60a8\u7684\u5e94\u7528\u4f1a\u53d8\u7684\u4e0d\u53ef\u7528\uff0c\u5c3d\u7ba1\u8fd9\u65f6\u95f4\u901a\u5e38\u662f\u6bd4\u8f83\u77ed\u7684\uff0c\u56e0\u4e3a\u5bf9\u5e94\u7684Pod\u4f1a\u5728\u65b0\u7684\u8282\u70b9\u4e0a\u91cd\u65b0\u88ab\u521b\u5efa\u3002<\/p>\n<p>\u4e00\u822c\u6765\u8bf4\uff0c\u5982\u679c\u4f60\u53ea\u6709\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f\u526f\u672c\uff0c\u5b83\u7684\u4efb\u4f55\u5f02\u5e38\u505c\u670d\u90fd\u4f1a\u5bfc\u81f4\u505c\u673a\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u60a8\u5fc5\u987b\u4e3a\u6b63\u5728\u8fd0\u884c\u7684\u5e94\u7528\u7a0b\u5e8f\u4fdd\u6301\u81f3\u5c11\u4e24\u4e2a\u526f\u672c\uff0c\u4ece\u800c\u9632\u6b62\u5355\u70b9\u6545\u969c\u3002<\/p>\n<p>\u526f\u672c\u8d8a\u591a\uff0c\u5728\u67d0\u4e9b\u526f\u672c\u53d1\u751f\u6545\u969c\u7684\u60c5\u51b5\u4e0b\uff0c\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u7684\u8ba1\u7b97\u80fd\u529b\u4e0b\u964d\u7684\u5e45\u5ea6\u4e5f\u5c31\u8d8a\u5c0f\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u60a8\u6709\u4e24\u4e2a\u526f\u672c\uff0c\u5176\u4e2d\u4e00\u4e2a\u7531\u4e8e\u8282\u70b9\u4e0a\u7684\u7f51\u7edc\u95ee\u9898\u800c\u5931\u8d25\u3002\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u5904\u7406\u7684\u8d1f\u8f7d\u5c06\u51cf\u534a(\u53ea\u6709\u4e24\u4e2a\u526f\u672c\u4e2d\u7684\u4e00\u4e2a\u53ef\u7528)\u3002\u5f53\u7136\uff0c\u65b0\u7684\u526f\u672c\u4f1a\u88ab\u8c03\u5ea6\u5230\u65b0\u7684\u8282\u70b9\u4e0a\uff0c\u5e94\u7528\u7684\u8d1f\u8f7d\u80fd\u529b\u4f1a\u5b8c\u5168\u6062\u590d\u3002\u4f46\u5728\u90a3\u4e4b\u524d\uff0c\u589e\u52a0\u8d1f\u8f7d\u53ef\u80fd\u4f1a\u5bfc\u81f4\u670d\u52a1\u4e2d\u65ad\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u60a8\u5fc5\u987b\u4fdd\u7559\u4e00\u4e9b\u526f\u672c\u3002<\/p>\n<p>\u4e0a\u8ff0\u5efa\u8bae\u4e0e\u672a\u4f7f\u7528 HorizontalPodAutoscaler \u7684\u60c5\u51b5\u76f8\u5173\u3002\u5bf9\u4e8e\u6709\u591a\u4e2a\u526f\u672c\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u6700\u597d\u7684\u66ff\u4ee3\u65b9\u6cd5\u662f\u914d\u7f6e HorizontalPodAutoscaler \u5e76\u8ba9\u5b83\u7ba1\u7406\u526f\u672c\u7684\u6570\u91cf\u3002\u672c\u6587\u7684\u6700\u540e\u4f1a\u8be6\u7ec6\u63cf\u8ff0HorizontalPodAutoscaler\u3002<\/p>\n<h2>\u4e8c\u3001\u66f4\u65b0\u7b56\u7565<\/h2>\n<p>Deployment \u7684\u9ed8\u8ba4\u66f4\u65b0\u7b56\u7565\u9700\u8981\u51cf\u5c11\u65e7+\u65b0\u7684 ReplicaSet Pod \u7684\u6570\u91cf\uff0c\u5176Ready\u72b6\u6001\u4e3a\u66f4\u65b0\u524d\u6570\u91cf\u7684 75%\u3002\u56e0\u6b64\uff0c\u5728\u66f4\u65b0\u8fc7\u7a0b\u4e2d\uff0c\u5e94\u7528\u7a0b\u5e8f\u7684\u8ba1\u7b97\u80fd\u529b\u53ef\u80fd\u4f1a\u4e0b\u964d\u5230\u6b63\u5e38\u6c34\u5e73\u7684 75%\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u90e8\u5206\u6545\u969c(\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u4e0b\u964d)\u3002<\/p>\n<p>\u8be5strategy.RollingUpdate.maxUnavailable\u53c2\u6570\u5141\u8bb8\u60a8\u914d\u7f6e\u66f4\u65b0\u671f\u95f4\u53ef\u80fd\u53d8\u5f97\u4e0d\u53ef\u7528\u7684Pod\u7684\u6700\u5927\u767e\u5206\u6bd4\u3002\u56e0\u6b64\uff0c\u8981\u4e48\u786e\u4fdd\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u5728 25% \u7684Pod\u4e0d\u53ef\u7528\u7684\u60c5\u51b5\u4e0b\u4e5f\u80fd\u987a\u5229\u8fd0\u884c\uff0c\u8981\u4e48\u964d\u4f4e\u8be5maxUnavailable\u53c2\u6570\u3002\u8bf7\u6ce8\u610f\uff0c\u8be5maxUnavailable\u53c2\u6570\u5df2\u56db\u820d\u4e94\u5165\u3002<\/p>\n<p>\u9ed8\u8ba4\u66f4\u65b0\u7b56\u7565 ( RollingUpdate)\u6709\u4e00\u4e2a\u5c0f\u6280\u5de7\uff1a\u5e94\u7528\u7a0b\u5e8f\u5728\u6eda\u52a8\u66f4\u65b0\u8fc7\u7a0b\u4e2d\uff0c\u591a\u526f\u672c\u7b56\u7565\u4f9d\u7136\u6709\u6548\uff0c\u65b0\u65e7\u7248\u672c\u4f1a\u540c\u65f6\u5b58\u5728\uff0c\u4e00\u76f4\u5230\u6240\u6709\u7684\u5e94\u7528\u90fd\u66f4\u65b0\u5b8c\u6bd5\u3002\u4f46\u662f\uff0c\u5982\u679c\u7531\u4e8e\u67d0\u79cd\u539f\u56e0\u65e0\u6cd5\u5e76\u884c\u8fd0\u884c\u4e0d\u540c\u7684\u526f\u672c\u548c\u4e0d\u540c\u7248\u672c\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u90a3\u4e48\u60a8\u53ef\u4ee5\u4f7f\u7528strategy.type: Recreate\u53c2\u6570\u3002\u5728Recreate\u7b56\u7565\u4e0b\uff0c\u6240\u6709\u73b0\u6709Pod\u5728\u521b\u5efa\u65b0Pod\u4e4b\u524d\u90fd\u4f1a\u88ab\u6740\u6b7b\u3002\u8fd9\u4f1a\u5bfc\u81f4\u77ed\u6682\u7684\u505c\u673a\u65f6\u95f4\u3002<\/p>\n<p>\u5176\u4ed6\u90e8\u7f72\u7b56\u7565(\u84dd\u7eff\u3001\u91d1\u4e1d\u96c0\u7b49)\u901a\u5e38\u53ef\u4ee5\u4e3a RollingUpdate \u7b56\u7565\u63d0\u4f9b\u66f4\u597d\u7684\u66ff\u4ee3\u65b9\u6848\u3002\u4f46\u662f\uff0c\u6211\u4eec\u6ca1\u6709\u5728\u672c\u6587\u4e2d\u8003\u8651\u5b83\u4eec\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u5b9e\u73b0\u53d6\u51b3\u4e8e\u7528\u4e8e\u90e8\u7f72\u5e94\u7528\u7a0b\u5e8f\u7684\u8f6f\u4ef6\u3002<\/p>\n<h2>\u4e09\u3001\u8de8\u8282\u70b9\u7684\u7edf\u4e00\u526f\u672c\u5206\u5e03<\/h2>\n<p>Kubernetes \u7684\u8bbe\u8ba1\u7406\u5ff5\u4e3a\u5047\u8bbe\u8282\u70b9\u4e0d\u53ef\u9760\uff0c\u8282\u70b9\u8d8a\u591a\uff0c\u53d1\u751f\u8f6f\u786c\u4ef6\u6545\u969c\u5bfc\u81f4\u8282\u70b9\u4e0d\u53ef\u7528\u7684\u51e0\u7387\u5c31\u8d8a\u9ad8\u3002\u6240\u4ee5\u6211\u4eec\u901a\u5e38\u9700\u8981\u7ed9\u5e94\u7528\u90e8\u7f72\u591a\u4e2a\u526f\u672c\uff0c\u5e76\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8c03\u6574 replicas \u7684\u503c\u3002\u8be5\u503c\u5982\u679c\u4e3a1 \uff0c\u5c31\u5fc5\u7136\u5b58\u5728\u5355\u70b9\u6545\u969c\u3002\u8be5\u503c\u5982\u679c\u5927\u4e8e1\u4f46\u6240\u6709\u526f\u672c\u90fd\u8c03\u5ea6\u5230\u540c\u4e00\u4e2a\u8282\u70b9\uff0c\u4ecd\u5c06\u65e0\u6cd5\u907f\u514d\u5355\u70b9\u6545\u969c\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u5355\u70b9\u6545\u969c\uff0c\u6211\u4eec\u9700\u8981\u6709\u5408\u7406\u7684\u526f\u672c\u6570\u91cf\uff0c\u8fd8\u9700\u8981\u8ba9\u4e0d\u540c\u526f\u672c\u8c03\u5ea6\u5230\u4e0d\u540c\u7684\u8282\u70b9\u3002\u4e3a\u6b64\uff0c\u60a8\u53ef\u4ee5\u6307\u793a\u8c03\u5ea6\u7a0b\u5e8f\u907f\u514d\u5728\u540c\u4e00\u8282\u70b9\u4e0a\u542f\u52a8\u540c\u4e00 Deployment \u7684\u591a\u4e2a Pod\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>affinity:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;PodAntiAffinity:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;preferredDuringSchedulingIgnoredDuringExecution:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;PodAffinityTerm:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;labelSelector:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;matchLabels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;app:&nbsp;testapp&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;topologyKey:&nbsp;kubernetes.io\/hostname&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u6700\u597d\u4f7f\u7528preferredDuringSchedulingaffinity\u800c\u4e0d\u662frequiredDuringScheduling\u3002\u5982\u679c\u65b0Pod\u6240\u9700\u7684\u8282\u70b9\u6570\u5927\u4e8e\u53ef\u7528\u8282\u70b9\u6570\uff0c\u540e\u8005\u53ef\u80fd\u4f1a\u5bfc\u81f4\u65e0\u6cd5\u542f\u52a8\u65b0 Pod\u3002\u5c3d\u7ba1\u5982\u6b64\uff0crequiredDuringScheduling\u5f53\u63d0\u524d\u77e5\u9053\u8282\u70b9\u548c\u5e94\u7528\u7a0b\u5e8f\u526f\u672c\u7684\u6570\u91cf\u5e76\u4e14\u60a8\u9700\u8981\u786e\u4fdd\u4e24\u4e2aPod\u4e0d\u4f1a\u5728\u540c\u4e00\u4e2a\u8282\u70b9\u4e0a\u7ed3\u675f\u65f6\uff0c\u4eb2\u548c\u6027\u4e5f\u5c31\u4f1a\u6d3e\u4e0a\u7528\u573a\u3002<\/p>\n<h2>\u56db\u3001\u4f18\u5148\u7ea7<\/h2>\n<p>priorityClassName\u4ee3\u8868\u60a8\u7684Pod\u4f18\u5148\u7ea7\u3002\u8c03\u5ea6\u5668\u4f7f\u7528\u5b83\u6765\u51b3\u5b9a\u9996\u5148\u8c03\u5ea6\u54ea\u4e9b Pod\uff0c\u5982\u679c\u8282\u70b9\u4e0a\u6ca1\u6709\u5269\u4f59Pod\u7a7a\u95f4\uff0c\u5e94\u8be5\u9996\u5148\u9a71\u9010\u54ea\u4e9b Pod\u3002<\/p>\n<p>\u60a8\u5c06\u9700\u8981\u6dfb\u52a0\u591a\u4e2aPriorityClass(https:\/\/kubernetes.io\/docs\/concepts\/configuration\/Pod-priority-preemption\/#priorityclass)\u7c7b\u578b\u8d44\u6e90\u5e76\u4f7f\u7528priorityClassName\u3002\u4ee5\u4e0b\u662f\u5982\u4f55PriorityClasses\u53d8\u5316\u7684\u793a\u4f8b\uff1a<\/p>\n<ul>\n<li>Cluster. Priority &gt; 10000\uff1a\u96c6\u7fa4\u5173\u952e\u7ec4\u4ef6\uff0c\u4f8b\u5982 kube-apiserver\u3002<\/li>\n<li>Daemonsets. Priority: 10000\uff1a\u901a\u5e38\u4e0d\u5efa\u8bae\u5c06 DaemonSet Pods \u4ece\u96c6\u7fa4\u8282\u70b9\u4e2d\u9a71\u9010\uff0c\u5e76\u66ff\u6362\u4e3a\u666e\u901a\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<li>Production-high. Priority: 9000\uff1a\u6709\u72b6\u6001\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<li>Production-medium. Priority: 8000\uff1a\u65e0\u72b6\u6001\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<li>Production-low. Priority: 7000\uff1a\u4e0d\u592a\u91cd\u8981\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<li>Default. Priority: 0\uff1a\u975e\u751f\u4ea7\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<\/ul>\n<p>\u8bbe\u7f6e\u4f18\u5148\u7ea7\u5c06\u5e2e\u52a9\u60a8\u907f\u514d\u5173\u952e\u7ec4\u4ef6\u7684\u7a81\u7136\u88ab\u9a71\u9010\u3002\u6b64\u5916\uff0c\u5982\u679c\u7f3a\u4e4f\u8282\u70b9\u8d44\u6e90\uff0c\u5173\u952e\u5e94\u7528\u7a0b\u5e8f\u5c06\u9a71\u9010\u4e0d\u592a\u91cd\u8981\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<h2>\u4e94\u3001\u505c\u6b62\u5bb9\u5668\u4e2d\u7684\u8fdb\u7a0b<\/h2>\n<p>STOPSIGNAL\u4e2d\u6307\u5b9a\u7684\u4fe1\u53f7(\u901a\u5e38\u4e3aTERM\u4fe1\u53f7)\u88ab\u53d1\u9001\u5230\u8fdb\u7a0b\u4ee5\u505c\u6b62\u5b83\u3002\u4f46\u662f\uff0c\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u65e0\u6cd5\u6b63\u786e\u5904\u7406\u5b83\u5e76\u4e14\u65e0\u6cd5\u6b63\u5e38\u505c\u670d\u3002\u5bf9\u4e8e\u5728 Kubernetes \u4e2d\u8fd0\u884c\u7684\u5e94\u7528\u7a0b\u5e8f\u4e5f\u662f\u5982\u6b64\u3002<\/p>\n<p>\u4f8b\u5982\u4e0b\u9762\u63cf\u8ff0\uff0c\u4e3a\u4e86\u6b63\u786e\u5173\u95ed nginx\uff0c\u4f60\u9700\u8981\u4e00\u4e2apreStop\u8fd9\u6837\u7684\u94a9\u5b50\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>lifecycle:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>preStop:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;<span>exec<\/span><span>:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;command:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;\/bin\/sh&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;-ec&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;|&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sleep&nbsp;3&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;nginx&nbsp;-s&nbsp;quit&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u4e0a\u8ff0\u7684\u7b80\u8981\u8bf4\u660e\uff1a<\/p>\n<ol>\n<li>sleep 3 \u53ef\u9632\u6b62\u56e0\u5220\u9664\u7aef\u70b9\u800c\u5bfc\u81f4\u7684\u7ade\u4e89\u72b6\u51b5\u3002<\/li>\n<li>nginx -s quit\u6b63\u786e\u5173\u95ednginx\u3002\u955c\u50cf\u4e2d\u4e0d\u9700\u8981\u914d\u7f6e\u6b64\u884c\uff0c\u56e0\u4e3a STOPSIGNAL: SIGQUIT\u53c2\u6570\u9ed8\u8ba4\u8bbe\u7f6e\u5728\u955c\u50cf\u4e2d\u3002<\/li>\n<\/ol>\n<p>STOPSIGNAL\u7684\u5904\u7406\u65b9\u5f0f\u4f9d\u8d56\u4e8e\u5e94\u7528\u7a0b\u5e8f\u672c\u8eab\u3002\u5b9e\u9645\u4e0a\uff0c\u5bf9\u4e8e\u5927\u591a\u6570\u5e94\u7528\u7a0b\u5e8f\uff0c\u60a8\u5fc5\u987b\u901a\u8fc7\u8c37\u6b4c\u641c\u7d22\u6216\u8005\u5176\u5b83\u9014\u5f84\u6765\u83b7\u53d6\u5904\u7406STOPSIGNAL\u7684\u65b9\u5f0f\u3002\u5982\u679c\u4fe1\u53f7\u5904\u7406\u4e0d\u5f53\uff0cpreStop\u94a9\u5b50\u53ef\u4ee5\u5e2e\u52a9\u60a8\u89e3\u51b3\u95ee\u9898\u3002\u53e6\u4e00\u79cd\u9009\u62e9\u662f\u7528\u5e94\u7528\u7a0b\u5e8f\u80fd\u591f\u6b63\u786e\u5904\u7406\u7684\u4fe1\u53f7(\u5e76\u5141\u8bb8\u5b83\u6b63\u5e38\u5173\u95ed)\u4ece\u800c\u6765\u66ff\u6362STOPSIGNAL\u3002<\/p>\n<p>terminationGracePeriodSeconds\u662f\u5173\u95ed\u5e94\u7528\u7a0b\u5e8f\u7684\u53e6\u4e00\u4e2a\u91cd\u8981\u53c2\u6570\u3002\u5b83\u6307\u5b9a\u5e94\u7528\u7a0b\u5e8f\u6b63\u5e38\u5173\u95ed\u7684\u65f6\u95f4\u6bb5\u3002\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u672a\u5728\u6b64\u65f6\u95f4\u8303\u56f4\u5185\u7ec8\u6b62(\u9ed8\u8ba4\u4e3a 30 \u79d2)\uff0c\u5b83\u5c06\u6536\u5230\u4e00\u4e2aKILL\u4fe1\u53f7\u3002\u56e0\u6b64\uff0c\u5982\u679c\u60a8\u8ba4\u4e3a\u8fd0\u884cpreStop\u94a9\u5b50\u548c\/\u6216\u5173\u95ed\u5e94\u7528\u7a0b\u5e8fSTOPSIGNAL\u53ef\u80fd\u9700\u8981\u8d85\u8fc7 30 \u79d2\uff0c\u60a8\u5c06\u9700\u8981\u589e\u52a0 terminateGracePeriodSeconds \u53c2\u6570\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6765\u81ea Web \u670d\u52a1\u5ba2\u6237\u7aef\u7684\u67d0\u4e9b\u8bf7\u6c42\u9700\u8981\u5f88\u957f\u65f6\u95f4\u624d\u80fd\u5b8c\u6210(\u6bd4\u5982\u6d89\u53ca\u4e0b\u8f7d\u5927\u6587\u4ef6\u7684\u8bf7\u6c42)\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u589e\u52a0\u5b83\u3002<\/p>\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0cpreStop hook \u6709\u4e00\u4e2a\u9501\u5b9a\u673a\u5236\uff0c\u5373\u53ea\u6709\u5728preStop hook \u8fd0\u884c\u5b8c\u6bd5\u540e\u624d\u80fd\u53d1\u9001STOPSIGNAL\u4fe1\u53f7\u3002\u540c\u65f6\uff0c\u5728preStop\u94a9\u5b50\u6267\u884c\u671f\u95f4\uff0cterminationGracePeriodSeconds\u5012\u8ba1\u65f6\u7ee7\u7eed\u8fdb\u884c\u3002\u6240\u6709\u7531\u94a9\u5b50\u5f15\u8d77\u7684\u8fdb\u7a0b\u4ee5\u53ca\u5bb9\u5668\u4e2d\u8fd0\u884c\u7684\u8fdb\u7a0b\u90fd\u5c06\u5728TerminationSeconds\u7ed3\u675f\u540e\u88ab\u7ec8\u6b62\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u5177\u6709\u7279\u5b9a\u8bbe\u7f6e\uff0c\u7528\u4e8e\u8bbe\u7f6e\u5e94\u7528\u7a0b\u5e8f\u5fc5\u987b\u7ec8\u6b62\u7684\u622a\u6b62\u65e5\u671f(\u4f8b\u5982\uff0c\u5728Sidekiq \u4e2d\u7684--timeout \u9009\u9879)\u3002\u56e0\u6b64\uff0c\u60a8\u5fc5\u987b\u786e\u4fdd\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u6709\u6b64\u914d\u7f6e\uff0c\u5219\u5b83\u7684\u503c\u7565\u5e94\u8be5\u4f4e\u4e8eterminationGracePeriodSeconds\u3002<\/p>\n<h2>\u516d\u3001\u9884\u7559\u8d44\u6e90<\/h2>\n<p>\u8c03\u5ea6\u5668\u4f7f\u7528 Pod\u7684resources.requests\u6765\u51b3\u5b9a\u5c06Pod\u8c03\u5ea6\u5728\u54ea\u4e2a\u8282\u70b9\u4e0a\u3002\u4f8b\u5982\uff0c\u65e0\u6cd5\u5728\u6ca1\u6709\u8db3\u591f\u7a7a\u95f2(\u5373\u975e\u8bf7\u6c42)\u8d44\u6e90\u6765\u6ee1\u8db3Pod\u8d44\u6e90\u8bf7\u6c42\u7684\u8282\u70b9\u4e0a\u8c03\u5ea6Pod\u3002\u53e6\u4e00\u65b9\u9762\uff0cresources.limits\u5141\u8bb8\u60a8\u9650\u5236\u4e25\u91cd\u8d85\u8fc7\u5176\u5404\u81ea\u8bf7\u6c42\u7684Pod\u7684\u8d44\u6e90\u6d88\u8017\u3002<\/p>\n<p>\u4e00\u4e2a\u5f88\u597d\u7684\u65b9\u5f0f\u662f\u8bbe\u7f6elimits\u7b49\u4e8e requests\u3002\u5c06limits\u8bbe\u7f6e\u4e3a\u8fdc\u9ad8\u4e8erequests\u53ef\u80fd\u4f1a\u5bfc\u81f4\u67d0\u4e9b\u8282\u70b9\u7684Pod\u65e0\u6cd5\u83b7\u53d6\u8bf7\u6c42\u7684\u8d44\u6e90\u7684\u60c5\u51b5\u3002\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8282\u70b9(\u751a\u81f3\u8282\u70b9\u672c\u8eab)\u4e0a\u7684\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u51fa\u73b0\u6545\u969c\u3002Kubernetes \u6839\u636e\u5176\u8d44\u6e90\u65b9\u6848\u4e3a\u6bcf\u4e2aPod\u5206\u914d\u4e00\u4e2a QoS \u7c7b\u3002\u7136\u540e\uff0cK8s \u4f7f\u7528 QoS \u7c7b\u6765\u51b3\u5b9a\u5e94\u8be5\u4ece\u8282\u70b9\u4e2d\u9a71\u9010\u54ea\u4e9b Pod\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u60a8\u5fc5\u987b\u540c\u65f6\u4e3a CPU \u548c\u5185\u5b58\u8bbe\u7f6erequests \u548c limits\u3002\u5982\u679cLinux \u5185\u6838\u7248\u672c\u65e9\u4e8e 5.4(https:\/\/engineering.indeedblog.com\/blog\/2019\/12\/cpu-throttling-regression-fix\/)\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u60a8\u552f\u4e00\u53ef\u4ee5\u7701\u7565\u7684\u662f CPU \u9650\u5236(\u5728 EL7\/CentOS7 \u7684\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u8981\u652f\u6301limits\uff0c\u5219\u5185\u6838\u7248\u672c\u5fc5\u987b\u5927\u4e8e 3.10.0-1062.8.1.el7)\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u7684\u5185\u5b58\u6d88\u8017\u5f80\u5f80\u4ee5\u65e0\u9650\u7684\u65b9\u5f0f\u589e\u957f\u3002\u4e00\u4e2a\u5f88\u597d\u7684\u4f8b\u5b50\u662f\u7528\u4e8e\u7f13\u5b58\u7684 Redis \u6216\u57fa\u672c\u4e0a\u201c\u72ec\u7acb\u201d\u8fd0\u884c\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u4e3a\u4e86\u9650\u5236\u5b83\u4eec\u5bf9\u8282\u70b9\u4e0a\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u7684\u5f71\u54cd\uff0c\u60a8\u53ef\u4ee5(\u5e76\u4e14\u5e94\u8be5)\u4e3a\u8981\u6d88\u8017\u7684\u5185\u5b58\u91cf\u8bbe\u7f6e\u9650\u5236\u3002<\/p>\n<p>\u552f\u4e00\u7684\u95ee\u9898\u662f\uff0c\u5f53\u5e94\u7528\u7a0b\u5e8f\u8fbe\u5230\u6b64\u9650\u5236\u65f6\u5e94\u7528\u7a0b\u5e8f\u5c06\u4f1a\u88abKILL\u3002\u5e94\u7528\u7a0b\u5e8f\u65e0\u6cd5\u9884\u6d4b\/\u5904\u7406\u6b64\u4fe1\u53f7\uff0c\u8fd9\u53ef\u80fd\u4f1a\u963b\u6b62\u5b83\u4eec\u6b63\u5e38\u5173\u95ed\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u9664\u4e86 Kubernetes \u9650\u5236\u4e4b\u5916\uff0c\u6211\u4eec\u5f3a\u70c8\u5efa\u8bae\u4f7f\u7528\u4e13\u95e8\u9488\u5bf9\u4e8e\u5e94\u7528\u7a0b\u5e8f\u672c\u8eab\u7684\u673a\u5236\u6765\u9650\u5236\u5185\u5b58\u6d88\u8017\uff0c\u4f7f\u5176\u4e0d\u4f1a\u8d85\u8fc7(\u6216\u63a5\u8fd1)\u5728 Pod\u7684limits.memory\u53c2\u6570\u4e2d\u8bbe\u7f6e\u7684\u6570\u503c\u3002<\/p>\n<p>\u8fd9\u662f\u4e00\u4e2aRedis\u914d\u7f6e\u6848\u4f8b\uff0c\u53ef\u4ee5\u5e2e\u52a9\u60a8\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>maxmemory&nbsp;500mb&nbsp;&nbsp;&nbsp;#&nbsp;if&nbsp;the&nbsp;amount&nbsp;<\/span><span>of<\/span><span>&nbsp;data&nbsp;exceeds&nbsp;500&nbsp;MB...&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>maxmemory-policy&nbsp;allkeys-lru&nbsp;&nbsp;&nbsp;#&nbsp;...Redis&nbsp;would&nbsp;<span>delete<\/span><span>&nbsp;rarely&nbsp;used&nbsp;keys&nbsp;<\/span><\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u81f3\u4e8e Sidekiq\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 Sidekiq worker killer(https:\/\/github.com\/klaxit\/sidekiq-worker-killer):<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>require&nbsp;<\/span><span>'sidekiq\/worker_killer'<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>Sidekiq.configure_server&nbsp;do&nbsp;|config|&nbsp;<\/span><\/li>\n   \n  \n  <li><span>config.server_middleware&nbsp;do&nbsp;|chain|&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;#&nbsp;Terminate&nbsp;Sidekiq&nbsp;correctly&nbsp;<span>when<\/span><span>&nbsp;it&nbsp;consumes&nbsp;500&nbsp;MB&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;chain.<span>add<\/span><span>&nbsp;Sidekiq::WorkerKiller,&nbsp;max_rss:&nbsp;500&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span><span>end<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span><span>end<\/span><span>&nbsp;<\/span><\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u5f88\u660e\u663e\uff0c\u5728\u6240\u6709\u8fd9\u4e9b\u60c5\u51b5\u4e0b\uff0climits.memory\u9700\u8981\u9ad8\u4e8e\u89e6\u53d1\u4e0a\u8ff0\u673a\u5236\u7684\u9608\u503c\u3002<\/p>\n<h2>\u4e03\u3001\u63a2\u9488<\/h2>\n<p>\u5728 Kubernetes \u4e2d\uff0c\u63a2\u9488(\u5065\u5eb7\u68c0\u67e5)\u7528\u4e8e\u786e\u5b9a\u662f\u5426\u53ef\u4ee5\u5c06\u6d41\u91cf\u5207\u6362\u5230\u5e94\u7528\u7a0b\u5e8f(readiness probes)\u4ee5\u53ca\u5e94\u7528\u7a0b\u5e8f\u662f\u5426\u9700\u8981\u91cd\u65b0\u542f\u52a8(liveness probes)\u3002\u5b83\u4eec\u5728\u66f4\u65b0\u90e8\u7f72\u548c\u542f\u52a8\u65b0Pod\u65b9\u9762\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u60f3\u4e3a\u6240\u6709\u63a2\u5934\u7c7b\u578b\u63d0\u4f9b\u4e00\u4e2a\u5efa\u8bae\uff1a\u4e3atimeoutSeconds\u53c2\u6570\u8bbe\u7f6e\u4e00\u4e2a\u8f83\u9ad8\u7684\u503c \u3002\u4e00\u79d2\u7684\u9ed8\u8ba4\u503c\u592a\u4f4e\u4e86\uff0c\u5b83\u5c06\u5bf9 readiness Probe \u548c liveness probes \u4ea7\u751f\u4e25\u91cd\u5f71\u54cd\u3002<\/p>\n<p>\u5982\u679ctimeoutSeconds\u592a\u4f4e\uff0c\u5e94\u7528\u7a0b\u5e8f\u54cd\u5e94\u65f6\u95f4\u7684\u589e\u52a0(\u7531\u4e8e\u670d\u52a1\u8d1f\u8f7d\u5747\u8861\uff0c\u6240\u6709Pod\u901a\u5e38\u540c\u65f6\u53d1\u751f)\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8fd9\u4e9bPod\u4ece\u8d1f\u8f7d\u5747\u8861\u4e2d\u5220\u9664(\u5728\u5c31\u7eea\u63a2\u6d4b\u5931\u8d25\u7684\u60c5\u51b5\u4e0b)\uff0c\u6216\u8005\uff0c\u66f4\u7cdf\u7cd5\u7684\u662f\uff0c\u5728\u7ea7\u8054\u5bb9\u5668\u91cd\u65b0\u542f\u52a8\u65f6(\u5728\u6d3b\u52a8\u63a2\u6d4b\u5931\u8d25\u7684\u60c5\u51b5\u4e0b)\u3002<\/p>\n<h3>7.1. \u6d3b\u6027\u63a2\u9488(liveness probes)<\/h3>\n<p>\u5728\u5b9e\u8df5\u4e2d\uff0c\u6d3b\u6027\u63a2\u9488\u7684\u4f7f\u7528\u5e76\u4e0d\u50cf\u60a8\u60f3\u8c61\u7684\u90a3\u6837\u5e7f\u6cdb\u3002\u5b83\u7684\u76ee\u7684\u662f\u5728\u5e94\u7528\u7a0b\u5e8f\u88ab\u51bb\u7ed3\u65f6\u91cd\u65b0\u542f\u52a8\u5bb9\u5668\u3002\u7136\u800c\uff0c\u5728\u73b0\u5b9e\u751f\u6d3b\u4e2d\uff0c\u5e94\u7528\u7a0b\u5e8f\u51fa\u73b0\u6b7b\u9501\u662f\u4e00\u4e2a\u610f\u5916\u60c5\u51b5\uff0c\u800c\u4e0d\u662f\u5e38\u89c4\u7684\u73b0\u8c61\u3002\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u51fa\u4e8e\u67d0\u79cd\u539f\u56e0\u5bfc\u81f4\u8fd9\u79cd\u5f02\u5e38\u7684\u73b0\u8c61(\u4f8b\u5982\uff0c\u5b83\u5728\u6570\u636e\u5e93\u65ad\u5f00\u540e\u65e0\u6cd5\u6062\u590d\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5)\uff0c\u60a8\u5fc5\u987b\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4fee\u590d\u5b83\uff0c\u800c\u4e0d\u662f\u201c\u589e\u52a0\u201d\u57fa\u4e8e liveness probes \u7684\u89e3\u51b3\u65b9\u6cd5\u3002<\/p>\n<p>\u867d\u7136\u60a8\u53ef\u4ee5\u4f7f\u7528 liveness probes \u6765\u68c0\u67e5\u8fd9\u4e9b\u72b6\u6001\uff0c\u4f46\u6211\u4eec\u5efa\u8bae\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4e0d\u4f7f\u7528 liveness Probe\u6216\u4ec5\u6267\u884c\u4e00\u4e9b\u57fa\u672c\u7684\u5b58\u6d3b\u7684\u63a2\u6d4b\uff0c\u4f8b\u5982\u63a2\u6d4b TCP \u8fde\u63a5(\u8bb0\u4f4f\u8bbe\u7f6e\u5927\u4e00\u70b9\u7684\u8d85\u65f6\u503c)\u3002\u8fd9\u6837\uff0c\u5e94\u7528\u7a0b\u5e8f\u5c06\u91cd\u65b0\u542f\u52a8\u4ee5\u54cd\u5e94\u660e\u663e\u7684\u6b7b\u9501\uff0c\u800c\u4e0d\u4f1a\u8fdb\u5165\u4e0d\u505c\u7684\u91cd\u65b0\u542f\u52a8\u7684\u6b7b\u5faa\u73af(\u5373\u91cd\u65b0\u542f\u52a8\u5b83\u4e5f\u65e0\u6d4e\u4e8e\u4e8b)\u3002<\/p>\n<p>\u4e0d\u5408\u7406\u7684 liveness probes \u914d\u7f6e\u5f15\u8d77\u7684\u98ce\u9669\u662f\u975e\u5e38\u4e25\u91cd\u7684\u3002\u5728\u6700\u5e38\u89c1\u7684\u60c5\u51b5\u4e0b\uff0c liveness probes \u5931\u8d25\u662f\u7531\u4e8e\u5e94\u7528\u7a0b\u5e8f\u8d1f\u8f7d\u589e\u52a0(\u5b83\u6839\u672c\u65e0\u6cd5\u5728 timeout \u53c2\u6570\u6307\u5b9a\u7684\u65f6\u95f4\u5185\u5b8c\u6210)\u6216\u7531\u4e8e\u5f53\u524d\u6b63\u5728\u68c0\u67e5(\u76f4\u63a5\u6216\u95f4\u63a5)\u7684\u5916\u90e8\u4f9d\u8d56\u9879\u7684\u72b6\u6001\u3002<\/p>\n<p>\u5728\u540e\u4e00\u79cd\u60c5\u51b5\u4e0b\uff0c\u6240\u6709\u5bb9\u5668\u90fd\u5c06\u91cd\u65b0\u542f\u52a8\u3002<\/p>\n<p>\u5728\u6700\u597d\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e0d\u4f1a\u5bfc\u81f4\u4efb\u4f55\u7ed3\u679c\uff0c\u4f46\u5728\u6700\u574f\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u5c06\u4f7f\u5e94\u7528\u7a0b\u5e8f\u5b8c\u5168\u4e0d\u53ef\u7528\uff0c\u4e5f\u53ef\u80fd\u662f\u957f\u671f\u4e0d\u53ef\u7528\u3002\u5982\u679c\u5927\u591a\u6570Pod\u7684\u5bb9\u5668\u5728\u77ed\u65f6\u95f4\u5185\u91cd\u65b0\u542f\u52a8\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u957f\u671f\u5b8c\u5168\u4e0d\u53ef\u7528(\u5982\u679c\u5b83\u6709\u5927\u91cf\u526f\u672c)\u3002\u4e00\u4e9b\u5bb9\u5668\u53ef\u80fd\u6bd4\u5176\u4ed6\u5bb9\u5668\u66f4\u5feb\u5730\u53d8\u4e3a READY\uff0c\u5e76\u4e14\u6574\u4e2a\u8d1f\u8f7d\u5c06\u5206\u5e03\u5728\u8fd9\u4e2a\u6709\u9650\u6570\u91cf\u7684\u8fd0\u884c\u5bb9\u5668\u4e0a\u3002\u8fd9\u6700\u7ec8\u4f1a\u5bfc\u81f4 liveness probes \u8d85\u65f6\uff0c\u4e5f\u5c06\u89e6\u53d1\u66f4\u591a\u7684\u91cd\u542f\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u5bf9\u5df2\u5efa\u7acb\u7684\u8fde\u63a5\u6570\u6709\u9650\u5236\u5e76\u4e14\u5df2\u8fbe\u5230\u8be5\u9650\u5236\uff0c\u8bf7\u786e\u4fddliveness probes\u4e0d\u4f1a\u505c\u6b62\u54cd\u5e94\u3002\u901a\u5e38\uff0c\u60a8\u5fc5\u987b\u4e3aliveness probes\u6307\u5b9a\u4e00\u4e2a\u5355\u72ec\u7684\u5e94\u7528\u7a0b\u5e8f\u7ebf\u7a0b\/\u8fdb\u7a0b\u6765\u907f\u514d\u6b64\u7c7b\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u670911\u4e2a\u7ebf\u7a0b(\u6bcf\u4e2a\u5ba2\u6237\u7aef\u4e00\u4e2a\u7ebf\u7a0b)\uff0c\u5219\u53ef\u4ee5\u5c06\u5ba2\u6237\u7aef\u6570\u91cf\u9650\u5236\u4e3a10\u4e2a\uff0c\u4ee5\u786e\u4fddliveness probes\u6709\u4e00\u4e2a\u7a7a\u95f2\u7ebf\u7a0b\u53ef\u7528\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u5f53\u7136\uff0c\u4e0d\u8981\u5411 liveness Probe \u6dfb\u52a0\u4efb\u4f55\u5916\u90e8\u4f9d\u8d56\u9879\u68c0\u67e5\u3002<\/p>\n<h3>7.2. \u5c31\u7eea\u63a2\u9488(Readiness probe)<\/h3>\n<p>\u4e8b\u5b9e\u8bc1\u660e\uff0creadinessProbe \u7684\u8bbe\u8ba1\u5e76\u4e0d\u662f\u5f88\u6210\u529f\u3002readinessProbe \u7ed3\u5408\u4e86\u4e24\u4e2a\u4e0d\u540c\u7684\u529f\u80fd\uff1a<\/p>\n<ul>\n<li>\u5b83\u4f1a\u5728\u5bb9\u5668\u542f\u52a8\u671f\u95f4\u627e\u51fa\u5e94\u7528\u7a0b\u5e8f\u662f\u5426\u53ef\u7528;<\/li>\n<li>\u5b83\u68c0\u67e5\u5bb9\u5668\u6210\u529f\u542f\u52a8\u540e\u5e94\u7528\u7a0b\u5e8f\u662f\u5426\u4ecd\u7136\u53ef\u7528\u3002<\/li>\n<\/ul>\n<p>\u5728\u5b9e\u8df5\u4e2d\uff0c\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u90fd\u9700\u8981\u7b2c\u4e00\u4e2a\u529f\u80fd\uff0c\u800c\u7b2c\u4e8c\u4e2a\u529f\u80fd\u7684\u4f7f\u7528\u9891\u7387\u4ec5\u4e0e liveness Probe \u4e00\u6837\u3002\u914d\u7f6e\u4e0d\u5f53\u7684 readiness Probe \u53ef\u80fd\u4f1a\u5bfc\u81f4\u7c7b\u4f3c\u4e8e liveness Probe \u7684\u95ee\u9898\u3002\u5728\u6700\u574f\u7684\u60c5\u51b5\u4e0b\uff0c\u5b83\u4eec\u6700\u7ec8\u8fd8\u53ef\u80fd\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u957f\u671f\u4e0d\u53ef\u7528\u3002<\/p>\n<p>\u5f53 readiness Probe \u5931\u8d25\u65f6\uff0cPod \u505c\u6b62\u63a5\u6536\u6d41\u91cf\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u8fd9\u79cd\u884c\u4e3a\u6ca1\u4ec0\u4e48\u7528\uff0c\u56e0\u4e3a\u6d41\u91cf\u901a\u5e38\u6216\u591a\u6216\u5c11\u5730\u5728 Pod \u4e4b\u95f4\u5747\u5300\u5206\u5e03\u3002\u56e0\u6b64\uff0c\u4e00\u822c\u6765\u8bf4\uff0creadiness Probe \u8981\u4e48\u5728\u4efb\u4f55\u5730\u65b9\u90fd\u6709\u6548\uff0c\u8981\u4e48\u4e0d\u80fd\u540c\u65f6\u5728\u5927\u91cf Pod \u4e0a\u5de5\u4f5c\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6b64\u7c7b\u884c\u4e3a\u53ef\u80fd\u6709\u7528\u3002\u4f46\u662f\uff0c\u6839\u636e\u6211\u7684\u7ecf\u9a8c\uff0c\u8fd9\u4e5f\u4e3b\u8981\u662f\u5728\u67d0\u4e9b\u7279\u6b8a\u60c5\u51b5\u4e0b\u624d\u6709\u7528\u3002<\/p>\n<p>\u5c3d\u7ba1\u5982\u6b64\uff0creadiness Probe \u8fd8\u5177\u6709\u53e6\u4e00\u4e2a\u5173\u952e\u529f\u80fd\uff1a\u5b83\u6709\u52a9\u4e8e\u786e\u5b9a\u65b0\u521b\u5efa\u7684\u5bb9\u5668\u4f55\u65f6\u53ef\u4ee5\u5904\u7406\u6d41\u91cf\uff0c\u4ee5\u514d\u5c06\u8d1f\u8f7d\u8f6c\u53d1\u5230\u5c1a\u672a\u51c6\u5907\u597d\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u8fd9\u4e2a readiness Probe \u529f\u80fd\u5728\u4efb\u4f55\u65f6\u5019\u90fd\u662f\u5fc5\u8981\u7684\u3002<\/p>\n<p>\u6362\u53e5\u8bdd\u8bf4\uff0creadiness Probe\u7684\u4e00\u4e2a\u529f\u80fd\u9700\u6c42\u91cf\u5f88\u5927\uff0c\u800c\u53e6\u4e00\u4e2a\u529f\u80fd\u6839\u672c\u4e0d\u9700\u8981\u3002startup Probe\u7684\u5f15\u5165\u89e3\u51b3\u4e86\u8fd9\u4e00\u96be\u9898\u3002\u5b83\u6700\u65e9\u51fa\u73b0\u5728Kubernetes 1.16\u4e2d\uff0c\u5728v1.18\u4e2d\u6210\u4e3abeta\u7248\uff0c\u5728v1.20\u4e2d\u4fdd\u6301\u7a33\u5b9a\u3002\u56e0\u6b64\uff0c\u6700\u597d\u4f7f\u7528readiness Probe\u68c0\u67e5\u5e94\u7528\u7a0b\u5e8f\u5728Kubernetes 1.18\u4ee5\u4e0b\u7248\u672c\u4e2d\u662f\u5426\u5df2\u5c31\u7eea\uff0c\u800c\u5728Kubernetes 1.18\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\u662f\u5426\u5df2\u5c31\u7eea\u5219\u63a8\u8350\u4f7f\u7528startup Probe\u3002\u540c\u6837\uff0c\u5982\u679c\u5728\u5e94\u7528\u7a0b\u5e8f\u542f\u52a8\u540e\u9700\u8981\u505c\u6b62\u5355\u4e2aPod\u7684\u6d41\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528Kubernetes 1.18+\u4e2d\u7684readiness Probe\u3002<\/p>\n<h3>7.3. \u542f\u52a8\u63a2\u9488<\/h3>\n<p>startup Probe \u68c0\u67e5\u5bb9\u5668\u4e2d\u7684\u5e94\u7528\u7a0b\u5e8f\u662f\u5426\u51c6\u5907\u5c31\u7eea\u3002\u7136\u540e\u5b83\u5c06\u5f53\u524d Pod \u6807\u8bb0\u4e3a\u51c6\u5907\u597d\u63a5\u6536\u6d41\u91cf\u6216\u7ee7\u7eed\u66f4\u65b0\/\u91cd\u65b0\u542f\u52a8\u90e8\u7f72\u3002\u4e0e readiness Probe \u4e0d\u540c\uff0cstartup Probe \u5728\u5bb9\u5668\u542f\u52a8\u540e\u505c\u6b62\u5de5\u4f5c\u3002<\/p>\n<p>\u6211\u4eec\u4e0d\u5efa\u8bae\u4f7f\u7528 startup Probe \u6765\u68c0\u67e5\u5916\u90e8\u4f9d\u8d56\uff1a\u5b83\u7684\u5931\u8d25\u4f1a\u89e6\u53d1\u5bb9\u5668\u91cd\u542f\uff0c\u8fd9\u6700\u7ec8\u53ef\u80fd\u5bfc\u81f4 Pod \u5904\u4e8eCrashLoopBackOff\u72b6\u6001\u3002\u5728\u8fd9\u79cd\u72b6\u6001\u4e0b\uff0c\u5c1d\u8bd5\u91cd\u65b0\u542f\u52a8\u5931\u8d25\u7684\u5bb9\u5668\u4e4b\u95f4\u7684\u5ef6\u8fdf\u53ef\u80fd\u9ad8\u8fbe\u4e94\u5206\u949f\u3002\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u505c\u673a\u65f6\u95f4\uff0c\u56e0\u4e3a\u5c3d\u7ba1\u5e94\u7528\u7a0b\u5e8f\u5df2\u51c6\u5907\u597d\u91cd\u65b0\u542f\u52a8\uff0c\u4f46\u5bb9\u5668\u4f1a\u7ee7\u7eed\u7b49\u5f85\uff0c\u76f4\u5230\u56e0CrashLoopBackOff\u800c\u5c1d\u8bd5\u91cd\u65b0\u542f\u52a8\u7684\u65f6\u95f4\u6bb5\u7ed3\u675f\u3002<\/p>\n<p>\u5982\u679c\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u63a5\u6536\u6d41\u91cf\u5e76\u4e14\u60a8\u7684 Kubernetes \u7248\u672c\u4e3a 1.18 \u6216\u66f4\u9ad8\u7248\u672c\uff0c\u5219\u60a8\u5e94\u8be5\u4f7f\u7528 startup Probe\u3002<\/p>\n<p>\u53e6\u8bf7\u6ce8\u610f\uff0c\u589e\u52a0failureThreshold\u914d\u7f6e\u800c\u4e0d\u662f\u8bbe\u7f6einitialDelaySeconds\u662f\u914d\u7f6e\u63a2\u9488\u7684\u9996\u9009\u65b9\u6cd5\u3002\u8fd9\u5c06\u4f7f\u5bb9\u5668\u5c3d\u5feb\u53ef\u7528\u3002<\/p>\n<h2>\u516b\u3001\u68c0\u67e5\u5916\u90e8\u4f9d\u8d56<\/h2>\n<p>\u5982\u60a8\u6240\u77e5\uff0creadiness Probe \u901a\u5e38\u7528\u4e8e\u68c0\u67e5\u5916\u90e8\u4f9d\u8d56\u9879(\u4f8b\u5982\u6570\u636e\u5e93)\u3002\u867d\u7136\u8fd9\u79cd\u65b9\u6cd5\u7406\u5e94\u5b58\u5728\uff0c\u4f46\u5efa\u8bae\u60a8\u5c06\u68c0\u67e5\u5916\u90e8\u4f9d\u8d56\u9879\u7684\u65b9\u6cd5\u4e0e\u68c0\u67e5 Pod \u4e2d\u7684\u5e94\u7528\u7a0b\u5e8f\u662f\u5426\u6ee1\u8d1f\u8377\u8fd0\u884c(\u5e76\u5207\u65ad\u5411\u5176\u53d1\u9001\u6d41\u91cf)\u7684\u65b9\u6cd5\u5206\u5f00\u4e5f\u662f\u4e2a\u597d\u4e3b\u610f)\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528initContainers\u5728\u8fd0\u884c\u4e3b\u5bb9\u5668\u7684 startupProbe\/readinessProbe \u4e4b\u524d\u68c0\u67e5\u5916\u90e8\u4f9d\u8d56\u9879\u3002\u5f88\u660e\u663e\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u5c06\u4e0d\u518d\u9700\u8981\u4f7f\u7528 readiness Probe \u68c0\u67e5\u5916\u90e8\u4f9d\u8d56\u9879\u3002initContainers\u4e0d\u9700\u8981\u66f4\u6539\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801\u3002\u60a8\u4e0d\u9700\u8981\u5d4c\u5165\u989d\u5916\u7684\u5de5\u5177\u6765\u4f7f\u7528\u5b83\u4eec\u6765\u68c0\u67e5\u5e94\u7528\u7a0b\u5e8f\u5bb9\u5668\u4e2d\u7684\u5916\u90e8\u4f9d\u8d56\u9879\u3002\u901a\u5e38\uff0c\u5b83\u4eec\u76f8\u5f53\u5bb9\u6613\u5b9e\u73b0\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>initContainers:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;-&nbsp;<span>name<\/span><span>:&nbsp;wait-postgres&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;image:&nbsp;postgres:12.1-alpine&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;command:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;sh&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;-ec&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;|&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;until&nbsp;(pg_isready&nbsp;-h&nbsp;example.org&nbsp;-p&nbsp;5432&nbsp;-U&nbsp;postgres);&nbsp;do&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sleep&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;done&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;resources:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;requests:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;50m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;50Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;limits:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;50m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;50Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;-&nbsp;<span>name<\/span><span>:&nbsp;wait-redis&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;image:&nbsp;redis:6.0.10-alpine3.13&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;command:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;sh&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;-ec&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;|&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;until&nbsp;(redis-cli&nbsp;-u&nbsp;redis:\/\/redis:6379\/0&nbsp;ping);&nbsp;do&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sleep&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;done&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;resources:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;requests:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;50m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;50Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;limits:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;50m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;50Mi&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<h2>\u4e5d\u3001\u5b8c\u6574\u793a\u4f8b<\/h2>\n<p>\u4e0b\u9762\u662f\u65e0\u72b6\u6001\u5e94\u7528\u7a0b\u5e8f\u7684\u751f\u4ea7\u7ea7\u90e8\u7f72\u7684\u5b8c\u6574\u793a\u4f8b\uff0c\u5176\u4e2d\u5305\u542b\u4e0a\u9762\u63d0\u4f9b\u7684\u6240\u6709\u5efa\u8bae\u3002\u53ef\u4ee5\u4f5c\u4e3a\u5927\u5bb6\u751f\u6210\u7684\u53c2\u8003\u3002<\/p>\n<p>\u60a8\u5c06\u9700\u8981 Kubernetes 1.18 \u6216\u66f4\u9ad8\u7248\u672c\u4ee5\u53ca\u5185\u6838\u7248\u672c\u4e3a 5.4 \u6216\u66f4\u9ad8\u7248\u672c\u7684\u57fa\u4e8e Ubuntu\/Debian \u7684Kubernetes\u8282\u70b9\u3002<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;apps\/v1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;Deployment&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;testapp&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>replicas:&nbsp;10&nbsp;<\/span><\/li>\n   \n  \n  <li><span>selector:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;matchLabels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;app:&nbsp;testapp&nbsp;<\/span><\/li>\n   \n  \n  <li><span>template:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;labels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;app:&nbsp;testapp&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;affinity:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PodAntiAffinity:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;preferredDuringSchedulingIgnoredDuringExecution:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;PodAffinityTerm:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;labelSelector:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;matchLabels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;app:&nbsp;testapp&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;topologyKey:&nbsp;kubernetes.io\/hostname&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;priorityClassName:&nbsp;production-medium&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;terminationGracePeriodSeconds:&nbsp;40&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;initContainers:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;<span>name<\/span><span>:&nbsp;wait-postgres&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;image:&nbsp;postgres:12.1-alpine&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;command:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;sh&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;-ec&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;|&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;until&nbsp;(pg_isready&nbsp;-h&nbsp;example.org&nbsp;-p&nbsp;5432&nbsp;-U&nbsp;postgres);&nbsp;do&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sleep&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;done&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resources:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;requests:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;50m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;50Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;limits:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;50m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;50Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;containers:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;<span>name<\/span><span>:&nbsp;backend&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;image:&nbsp;my-app-image:1.11.1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;command:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;run&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;app&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;<span>--trigger-graceful-shutdown-if-memory-usage-is-higher-than<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;450Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;<span>--timeout-seconds-for-graceful-shutdown<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;35s&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startupProbe:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;httpGet:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;path:&nbsp;\/simple-startup-<span>check<\/span><span>-<\/span><span>no<\/span><span>-external-dependencies&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;port:&nbsp;80&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;timeoutSeconds:&nbsp;7&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;failureThreshold:&nbsp;12&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;lifecycle:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;preStop:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span>exec<\/span><span>:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[<span>\"sh\"<\/span><span>,&nbsp;<\/span><span>\"-ec\"<\/span><span>,&nbsp;<\/span><span>\"#command&nbsp;to&nbsp;shutdown&nbsp;gracefully&nbsp;if&nbsp;needed\"<\/span><span>]&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resources:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;requests:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;200m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;500Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;limits:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;200m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;500Mi&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<h2>\u5341\u3001PodDisruptionBudget<\/h2>\n<p>PodDisruptionBudget(PDB\uff1ahttps:\/\/kubernetes.io\/docs\/concepts\/workloads\/Pods\/disruptions\/#Pod-disruption-budgets)\u673a\u5236\u662f\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u8fd0\u884c\u7684\u5e94\u7528\u7a0b\u5e8f\u7684\u5fc5\u5907\u5de5\u5177\u3002\u5b83\u4e3a\u60a8\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6307\u5b9a\u540c\u65f6\u4e0d\u53ef\u7528\u7684\u5e94\u7528\u7a0b\u5e8fPod\u6570\u91cf\u7684\u6700\u5927\u9650\u5236\u3002\u5728\u4e0a\u6587\u4e2d\uff0c\u6211\u4eec\u8ba8\u8bba\u4e86\u4e00\u4e9b\u6709\u52a9\u4e8e\u907f\u514d\u6f5c\u5728\u98ce\u9669\u60c5\u51b5\u7684\u65b9\u6cd5\uff1a\u8fd0\u884c\u591a\u4e2a\u5e94\u7528\u7a0b\u5e8f\u526f\u672c\uff0c\u6307\u5b9aPodAntiAffinity(\u4ee5\u9632\u6b62\u591a\u4e2aPod\u88ab\u5206\u914d\u5230\u540c\u4e00\u8282\u70b9)\uff0c\u7b49\u7b49\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u60a8\u53ef\u80fd\u4f1a\u9047\u5230\u591a\u4e2a K8s \u8282\u70b9\u540c\u65f6\u4e0d\u53ef\u7528\u7684\u60c5\u51b5\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u60a8\u51b3\u5b9a\u5c06\u5b9e\u4f8b\u8282\u70b9\u5207\u6362\u5347\u7ea7\u5230\u66f4\u9ad8\u914d\u7f6e\u7684\u7684\u5b9e\u4f8b\u8282\u70b9\u3002\u9664\u6b64\u4e4b\u5916\u53ef\u80fd\u8fd8\u6709\u5176\u4ed6\u539f\u56e0\uff0c\u672c\u6587\u4e0d\u505a\u66f4\u8be6\u7ec6\u7684\u63cf\u8ff0\u3002\u6700\u7ec8\u7684\u95ee\u9898\u90fd\u662f\u591a\u4e2a\u8282\u70b9\u540c\u65f6\u88ab\u5220\u9664\u3002\u4f60\u53ef\u80fd\u4f1a\u8ba4\u4e3a\uff0cKubernetes\u91cc\u7684\u4e00\u5207\u90fd\u662f\u6619\u82b1\u4e00\u73b0\u7684!\u54ea\u6015\u8282\u70b9\u5f02\u5e38\u6216\u88ab\u5220\u9664\uff0c\u8282\u70b9\u4e0a\u9762\u7684Pod \u5c06\u4f1a\u88ab\u81ea\u52a8\u91cd\u5efa\u5230\u5176\u4ed6\u8282\u70b9\u4e0a\uff0c\u56e0\u6b64\uff0c\u8fd9\u53c8\u4f1a\u6709\u4ec0\u4e48\u5173\u7cfb\u5462?\u597d\u5427\uff0c\u8ba9\u6211\u4eec\u6765\u7ee7\u7eed\u5f80\u4e0b\u770b\u770b\u3002<\/p>\n<p>\u5047\u8bbe\u5e94\u7528\u7a0b\u5e8f\u6709\u4e09\u4e2a\u526f\u672c\u3002\u8d1f\u8f7d\u5728\u5b83\u4eec\u4e4b\u95f4\u5747\u5300\u5206\u5e03\uff0c\u800c Pod \u5219\u5206\u5e03\u5728\u8282\u70b9\u4e4b\u95f4\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5373\u4f7f\u5176\u4e2d\u4e00\u4e2a\u526f\u672c\u51fa\u73b0\u6545\u969c\uff0c\u5e94\u7528\u7a0b\u5e8f\u4e5f\u5c06\u7ee7\u7eed\u8fd0\u884c\u3002\u7136\u800c\uff0c\u4e24\u4e2a\u526f\u672c\u7684\u6545\u969c\u5219\u4f1a\u5bfc\u81f4\u670d\u52a1\u6574\u4f53\u964d\u7ea7\uff1a\u4e00\u4e2a\u5355\u72ec\u7684 Pod \u6839\u672c\u65e0\u6cd5\u5355\u72ec\u5904\u7406\u6574\u4e2a\u8d1f\u8f7d\u3002\u5ba2\u6237\u7aef\u5c06\u5f00\u59cb\u6536\u5230 5XX \u9519\u8bef\u3002(\u5f53\u7136\uff0c\u60a8\u53ef\u4ee5\u5728 nginx \u5bb9\u5668\u4e2d\u8bbe\u7f6e\u901f\u7387\u9650\u5236;\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9519\u8bef\u5c06\u662f429 Too Many Requests\u3002\u4e0d\u8fc7\uff0c\u670d\u52a1\u4ecd\u7136\u4f1a\u964d\u7ea7)\u3002<\/p>\n<p>\u8fd9\u5c31\u662f PodDisruptionBudget \u53ef\u4ee5\u63d0\u4f9b\u5e2e\u52a9\u7684\u5730\u65b9\u3002\u6211\u4eec\u6765\u770b\u770b\u5b83\u7684\u914d\u7f6e\u6e05\u5355\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;policy\/v1beta1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;PodDisruptionBudget&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;app-pdb&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>maxUnavailable:&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>selector:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;matchLabels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;app:&nbsp;app&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u4e0a\u8ff0\u7684\u914d\u7f6e\u6e05\u5355\u975e\u5e38\u7b80\u5355\uff1b\u4f60\u53ef\u80fd\u719f\u6089\u5b83\u7684\u5927\u90e8\u5206\u914d\u7f6e\uff0cmaxUnavailable\u662f\u5176\u4e2d\u6700\u6709\u8da3\u7684\u3002\u6b64\u5b57\u6bb5\u63cf\u8ff0\u53ef\u540c\u65f6\u4e0d\u53ef\u7528\u7684\u6700\u5927 Pod \u6570\u3002\u8fd9\u53ef\u4ee5\u662f\u6570\u5b57\u4e5f\u53ef\u4ee5\u662f\u767e\u5206\u6bd4\u3002<\/p>\n<p>\u5047\u8bbe\u4e3a\u5e94\u7528\u7a0b\u5e8f\u914d\u7f6e\u4e86 PDB\u3002\u5982\u679c\u51fa\u4e8e\u67d0\u79cd\u539f\u56e0\uff0c\u4e24\u4e2a\u6216\u591a\u4e2a\u8282\u70b9\u5f00\u59cb\u9a71\u9010\u5e94\u7528\u7a0b\u5e8f Pod\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48?\u4e0a\u8ff0 PDB \u4e00\u6b21\u53ea\u5141\u8bb8\u9a71\u9010\u4e00\u4e2a Pod\u3002\u56e0\u6b64\uff0c\u7b2c\u4e8c\u4e2a\u8282\u70b9\u4f1a\u7b49\u5230\u526f\u672c\u6570\u91cf\u6062\u590d\u5230\u9a71\u9010\u524d\u7684\u6c34\u5e73\uff0c\u7136\u540e\u624d\u4f1a\u9a71\u9010\u7b2c\u4e8c\u4e2a\u526f\u672c\u3002<\/p>\n<p>\u4f5c\u4e3a\u66ff\u4ee3\u65b9\u6848\uff0c\u60a8\u8fd8\u53ef\u4ee5\u8bbe\u7f6eminAvailable\u53c2\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;policy\/v1beta1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;PodDisruptionBudget&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;app-pdb&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>minAvailable:&nbsp;80%&nbsp;<\/span><\/li>\n   \n  \n  <li><span>selector:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;matchLabels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;app:&nbsp;app&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u6b64\u53c2\u6570\u53ef\u786e\u4fdd\u96c6\u7fa4\u4e2d\u81f3\u5c11\u6709 80% \u7684\u526f\u672c\u59cb\u7ec8\u53ef\u7528\u3002\u56e0\u6b64\uff0c\u5982\u6709\u5fc5\u8981\uff0c\u53ea\u80fd\u9a71\u9010 20% \u7684\u526f\u672c\u3002minAvailable\u53ef\u4ee5\u662f\u7edd\u5bf9\u6570\u6216\u767e\u5206\u6bd4\u3002<\/p>\n<p>\u4f46\u6709\u4e00\u4e2a\u95ee\u9898\uff1a\u96c6\u7fa4\u4e2d\u5fc5\u987b\u6709\u8db3\u591f\u7684\u8282\u70b9\u6ee1\u8db3PodAntiAffinity\u6761\u4ef6\u3002\u5426\u5219\uff0c\u60a8\u53ef\u80fd\u4f1a\u9047\u5230\u526f\u672c\u88ab\u9010\u51fa\u7684\u60c5\u51b5\uff0c\u4f46\u7531\u4e8e\u7f3a\u5c11\u5408\u9002\u7684\u8282\u70b9\uff0c\u8c03\u5ea6\u7a0b\u5e8f\u65e0\u6cd5\u91cd\u65b0\u90e8\u7f72\u5b83\u3002\u56e0\u6b64\uff0c\u6392\u7a7a\u4e00\u4e2a\u8282\u70b9\u5c06\u9700\u8981\u5f88\u957f\u65f6\u95f4\u624d\u80fd\u5b8c\u6210\uff0c\u5e76\u4e14\u4f1a\u4e3a\u60a8\u63d0\u4f9b\u4e24\u4e2a\u5e94\u7528\u7a0b\u5e8f\u526f\u672c\u800c\u4e0d\u662f\u4e09\u4e2a\u3002\u5f53\u7136\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u7528\u547d\u4ee4kubectl describe\u6765\u67e5\u770b\u4e00\u4e2a\u4e00\u81f4\u5728\u7b49\u5f85\u4e2d\u7684Pod\uff0c\u770b\u770b\u53d1\u751f\u4e86\u4ec0\u4e48\u4e8b\u60c5\uff0c\u5e76\u89e3\u51b3\u95ee\u9898\u3002\u4f46\u662f\uff0c\u6700\u597d\u8fd8\u662f\u5c3d\u91cf\u53bb\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\u53d1\u751f\u3002<\/p>\n<p>\u603b\u800c\u8a00\u4e4b\uff0c\u8bf7\u59cb\u7ec8\u4e3a\u7cfb\u7edf\u7684\u5173\u952e\u7ec4\u4ef6\u914d\u7f6e PDB\u3002<\/p>\n<h2>\u5341\u4e00\u3001HorizontalPodAutoscaler<\/h2>\n<p>\u8ba9\u6211\u4eec\u8003\u8651\u53e6\u4e00\u79cd\u60c5\u51b5\uff1a\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u7684\u610f\u5916\u8d1f\u8f7d\u660e\u663e\u9ad8\u4e8e\u5e73\u65f6\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\u60c5\u51b5?\u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u624b\u52a8\u6269\u5c55\u96c6\u7fa4\uff0c\u4f46\u8fd9\u4e0d\u662f\u6211\u4eec\u63a8\u8350\u4f7f\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u8fd9\u5c31\u662fHorizontalPodAutoscaler(HPA\uff0chttps:\/\/kubernetes.io\/docs\/tasks\/run-application\/horizontal-Pod-autoscale\/)\u7684\u7528\u6b66\u4e4b\u5730\u3002\u501f\u52a9 HPA\uff0c\u60a8\u53ef\u4ee5\u9009\u62e9\u4e00\u4e2a\u6307\u6807\u5e76\u5c06\u5176\u7528\u4f5c\u89e6\u53d1\u5668\uff0c\u6839\u636e\u6307\u6807\u7684\u503c\u81ea\u52a8\u5411\u4e0a\/\u5411\u4e0b\u6269\u5c55\u96c6\u7fa4\u3002\u60f3\u8c61\u4e00\u4e0b\uff0c\u5728\u4e00\u4e2a\u5b89\u9759\u7684\u591c\u665a\uff0c\u60a8\u7684\u96c6\u7fa4\u7a81\u7136\u56e0\u6d41\u91cf\u5927\u5e45\u4e0a\u5347\u800c\u7206\u70b8\uff0c\u4f8b\u5982\uff0cReddit \u7528\u6237\u53d1\u73b0\u4e86\u60a8\u7684\u670d\u52a1\uff0cCPU \u8d1f\u8f7d(\u6216\u5176\u4ed6\u4e00\u4e9b Pod \u6307\u6807)\u589e\u52a0\uff0c\u8fbe\u5230\u9608\u503c\uff0c\u7136\u540e HPA \u5f00\u59cb\u53d1\u6325\u4f5c\u7528\u3002\u5b83\u6269\u5c55\u4e86\u96c6\u7fa4\uff0c\u4ece\u800c\u5728\u5927\u91cf Pod \u4e4b\u95f4\u5747\u5300\u5206\u914d\u8d1f\u8f7d\u3002<\/p>\n<p>\u4e5f\u6b63\u662f\u591a\u4e8f\u4e86\u8fd9\u4e00\u70b9\uff0c\u6240\u6709\u4f20\u5165\u7684\u8bf7\u6c42\u90fd\u88ab\u6210\u529f\u5904\u7406\u3002\u540c\u6837\u91cd\u8981\u7684\u662f\uff0c\u5728\u8d1f\u8f7d\u6062\u590d\u5230\u5e73\u5747\u6c34\u5e73\u540e\uff0cHPA \u4f1a\u7f29\u5c0f\u96c6\u7fa4\u4ee5\u964d\u4f4e\u57fa\u7840\u8bbe\u65bd\u6210\u672c\u3002\u8fd9\u542c\u8d77\u6765\u5f88\u4e0d\u9519\uff0c\u4e0d\u662f\u5417?<\/p>\n<p>\u8ba9\u6211\u4eec\u770b\u770b HPA \u662f\u5982\u4f55\u8ba1\u7b97\u8981\u6dfb\u52a0\u7684\u526f\u672c\u6570\u91cf\u7684\u3002\u8fd9\u662f\u5b98\u65b9\u6587\u6863\u4e2d\u63d0\u4f9b\u7684\u516c\u5f0f\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>desiredReplicas&nbsp;=&nbsp;ceil[currentReplicas&nbsp;*&nbsp;(&nbsp;currentMetricValue&nbsp;\/&nbsp;desiredMetricValue&nbsp;)]&nbsp;<\/span><\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u73b0\u5728\u5047\u8bbe\uff1a<\/p>\n<ul>\n<li>\u5f53\u524d\u526f\u672c\u6570\u4e3a3;<\/li>\n<li>\u5f53\u524d\u5ea6\u91cf\u503c\u4e3a 100;<\/li>\n<li>\u5ea6\u91cf\u9608\u503c\u4e3a 60\u3002<\/li>\n<\/ul>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7ed3\u679c\u5219\u4e3a3 * ( 100 \/ 60 )\uff0c\u5373\u201c\u5927\u7ea6\u201d5 \u4e2a\u526f\u672c(HPA \u4f1a\u5c06\u7ed3\u679c\u5411\u4e0a\u820d\u5165)\u3002\u56e0\u6b64\uff0c\u5e94\u7528\u7a0b\u5e8f\u5c06\u83b7\u5f97\u989d\u5916\u7684\u53e6\u5916\u4e24\u4e2a\u526f\u672c\u3002\u5f53\u7136\uff0cHPA\u64cd\u4f5c\u8fd8\u4f1a\u7ee7\u7eed\uff1a\u5982\u679c\u8d1f\u8f7d\u51cf\u5c11\uff0cHPA \u5c06\u7ee7\u7eed\u8ba1\u7b97\u6240\u9700\u7684\u526f\u672c\u6570(\u4f7f\u7528\u4e0a\u9762\u7684\u516c\u5f0f)\u6765\u7f29\u5c0f\u96c6\u7fa4\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u8fd8\u6709\u4e00\u4e2a\u662f\u6211\u4eec\u6700\u5173\u5fc3\u7684\u90e8\u5206\u3002\u4f60\u5e94\u8be5\u4f7f\u7528\u4ec0\u4e48\u6307\u6807?\u9996\u5148\u60f3\u5230\u7684\u662f\u4e3b\u8981\u6307\u6807\uff0c\u4f8b\u5982 CPU \u6216\u5185\u5b58\u5229\u7528\u7387\u3002\u5982\u679c\u60a8\u7684 CPU \u548c\u5185\u5b58\u6d88\u8017\u4e0e\u8d1f\u8f7d\u6210\u6b63\u6bd4\uff0c\u8fd9\u5c06\u8d77\u4f5c\u7528\u3002\u4f46\u662f\u5982\u679c Pod \u5904\u7406\u4e0d\u540c\u7684\u8bf7\u6c42\u5462?\u6709\u4e9b\u8bf7\u6c42\u9700\u8981\u8f83\u5927\u7684 CPU \u5468\u671f\uff0c\u6709\u4e9b\u53ef\u80fd\u4f1a\u6d88\u8017\u5927\u91cf\u5185\u5b58\uff0c\u8fd8\u6709\u4e00\u4e9b\u53ea\u9700\u8981\u6700\u5c11\u7684\u8d44\u6e90\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u8ba9\u6211\u4eec\u770b\u4e00\u770bRabbitMQ\u961f\u5217\u548c\u5904\u7406\u5b83\u7684\u5b9e\u4f8b\u3002\u5047\u8bbe\u961f\u5217\u4e2d\u6709\u5341\u6761\u6d88\u606f\u3002\u76d1\u63a7\u663e\u793a\u6d88\u606f\u6b63\u5728\u7a33\u5b9a\u4e14\u5b9a\u671f\u5730\u9000\u51fa\u961f\u5217(\u6309\u7167RabbitMQ\u7684\u672f\u8bed)\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u6211\u4eec\u89c9\u5f97\u961f\u5217\u4e2d\u5e73\u5747\u670910\u6761\u6d88\u606f\u662f\u53ef\u4ee5\u7684\u3002\u4f46\u662f\u8d1f\u8f7d\u7a81\u7136\u589e\u52a0\uff0c\u961f\u5217\u589e\u52a0\u5230100\u6761\u6d88\u606f\u3002\u7136\u800c\uff0cworker\u7684CPU\u548c\u5185\u5b58\u6d88\u8017\u4fdd\u6301\u4e0d\u53d8\uff1a\u4ed6\u4eec\u7a33\u5b9a\u5730\u5904\u7406\u961f\u5217\uff0c\u5728\u961f\u5217\u4e2d\u7559\u4e0b\u5927\u7ea680-90\u6761\u6d88\u606f\u3002<\/p>\n<p>\u4f46\u662f\u5982\u679c\u6211\u4eec\u4f7f\u7528\u4e00\u4e2a\u81ea\u5b9a\u4e49\u6307\u6807\u6765\u63cf\u8ff0\u961f\u5217\u4e2d\u7684\u6d88\u606f\u6570\u91cf\u5462?\u8ba9\u6211\u4eec\u6309\u5982\u4e0b\u65b9\u5f0f\u914d\u7f6e\u6211\u4eec\u7684\u81ea\u5b9a\u4e49\u6307\u6807\uff1a<\/p>\n<ul>\n<li>\u5f53\u524d\u526f\u672c\u6570\u4e3a3;<\/li>\n<li>\u5f53\u524d\u5ea6\u91cf\u503c\u4e3a 80;<\/li>\n<li>\u5ea6\u91cf\u9608\u503c\u4e3a 15\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c3 * ( 80 \/ 15 ) = 16\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cHPA \u53ef\u4ee5\u5c06 worker \u7684\u6570\u91cf\u589e\u52a0\u5230 16\uff0c\u5e76\u4e14\u5b83\u4eec\u4f1a\u5feb\u901f\u5904\u7406\u961f\u5217\u4e2d\u7684\u6240\u6709\u6d88\u606f(\u6b64\u65f6 HPA \u5c06\u518d\u6b21\u51cf\u5c11\u5b83\u4eec\u7684\u6570\u91cf)\u3002\u4f46\u662f\uff0c\u5fc5\u987b\u51c6\u5907\u597d\u6240\u6709\u5fc5\u9700\u7684\u57fa\u7840\u67b6\u6784\u4ee5\u5bb9\u7eb3\u6b64\u6570\u91cf\u7684 Pod\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u4eec\u5fc5\u987b\u9002\u5408\u73b0\u6709\u8282\u70b9\uff0c\u6216\u8005\u5728\u4f7f\u7528Cluster Autoscaler(https:\/\/github.com\/kubernetes\/autoscaler\/tree\/master\/cluster-autoscaler)\u7684\u60c5\u51b5\u4e0b\uff0c\u5fc5\u987b\u7531\u57fa\u7840\u8bbe\u65bd\u4f9b\u5e94\u5546(\u4e91\u63d0\u4f9b\u5546)\u63d0\u4f9b\u65b0\u8282\u70b9\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u6211\u4eec\u53c8\u56de\u5230\u89c4\u5212\u96c6\u7fa4\u8d44\u6e90\u4e86\u3002<\/p>\n<p>\u73b0\u5728\u8ba9\u6211\u4eec\u6765\u770b\u770b\u4e00\u4e9b\u6e05\u5355\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;autoscaling\/v1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;HorizontalPodAutoscaler&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;php-apache&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>scaleTargetRef:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;apiVersion:&nbsp;apps\/v1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;kind:&nbsp;Deployment&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;php-apache&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>minReplicas:&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>maxReplicas:&nbsp;10&nbsp;<\/span><\/li>\n   \n  \n  <li><span>targetCPUUtilizationPercentage:&nbsp;50&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u8fd9\u4e2a\u5f88\u7b80\u5355\u3002\u4e00\u65e6 CPU \u8d1f\u8f7d\u8fbe\u5230 50%\uff0cHPA \u5c31\u4f1a\u5f00\u59cb\u5c06\u526f\u672c\u6570\u91cf\u6269\u5c55\u5230\u6700\u591a 10 \u4e2a\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u6bd4\u8f83\u6709\u8da3\u7684\u6848\u4f8b\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;autoscaling\/v1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;HorizontalPodAutoscaler&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;worker&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>scaleTargetRef:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;apiVersion:&nbsp;apps\/v1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;kind:&nbsp;Deployment&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;worker&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>minReplicas:&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>maxReplicas:&nbsp;10&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metrics:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>-&nbsp;type:&nbsp;External&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;external:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;metric:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;queue_messages&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;target:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;type:&nbsp;AverageValue&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;averageValue:&nbsp;15&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0c\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cHPA \u4f7f\u7528\u81ea\u5b9a\u4e49\u6307\u6807(https:\/\/kubernetes.io\/docs\/tasks\/run-application\/horizontal-Pod-autoscale\/#support-for-custom-metrics)\u3002\u5b83\u5c06\u6839\u636e\u961f\u5217\u7684\u5927\u5c0f(queue_messages\u6307\u6807)\u505a\u51fa\u6269\u5c55\u51b3\u7b56\u3002\u9274\u4e8e\u961f\u5217\u4e2d\u7684\u5e73\u5747\u6d88\u606f\u6570\u4e3a 10\uff0c\u6211\u4eec\u5c06\u9608\u503c\u8bbe\u7f6e\u4e3a 15\u3002\u8fd9\u6837\u53ef\u4ee5\u66f4\u51c6\u786e\u5730\u7ba1\u7406\u526f\u672c\u6570\u3002\u5982\u60a8\u6240\u89c1\uff0c\u4e0e\u57fa\u4e8e CPU \u7684\u6307\u6807\u76f8\u6bd4\uff0c\u81ea\u5b9a\u4e49\u6307\u6807\u53ef\u5b9e\u73b0\u66f4\u51c6\u786e\u7684\u96c6\u7fa4\u81ea\u52a8\u7f29\u653e\u3002<\/p>\n<p><strong>\u9644\u52a0\u7684\u529f\u80fd\uff1a<\/strong><\/p>\n<p>HPA \u914d\u7f6e\u9009\u9879\u662f\u591a\u6837\u5316\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u7ec4\u5408\u4e0d\u540c\u7684\u6307\u6807\u3002\u5728\u4e0b\u9762\u7684\u6e05\u5355\u4e2d\uff0c\u540c\u65f6\u4f7f\u7528CPU \u5229\u7528\u7387\u548c\u961f\u5217\u5927\u5c0f\u6765\u89e6\u53d1\u6269\u5c55\u51b3\u7b56\u3002<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;autoscaling\/v1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;HorizontalPodAutoscaler&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;worker&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>scaleTargetRef:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;apiVersion:&nbsp;apps\/v1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;kind:&nbsp;Deployment&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;worker&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>minReplicas:&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>maxReplicas:&nbsp;10&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metrics:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>-&nbsp;type:&nbsp;Resource&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;resource:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;cpu&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;target:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;type:&nbsp;Utilization&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;averageUtilization:&nbsp;50&nbsp;<\/span><\/li>\n   \n  \n  <li><span>-&nbsp;type:&nbsp;External&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;external:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;metric:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;queue_messages&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;target:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;type:&nbsp;AverageValue&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;averageValue:&nbsp;15&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cHPA\u53c8\u8be5\u91c7\u7528\u4ec0\u4e48\u8ba1\u7b97\u7b97\u6cd5?\u597d\u5427\uff0c\u5b83\u4f7f\u7528\u8ba1\u7b97\u51fa\u7684\u6700\u9ad8\u526f\u672c\u6570\uff0c\u800c\u4e0d\u8003\u8651\u6240\u5229\u7528\u7684\u6307\u6807\u5982\u4f55\u3002\u4f8b\u5982\uff0c\u5982\u679c\u57fa\u4e8e CPU \u6307\u6807\u7684\u503c\u663e\u793a\u9700\u8981\u6dfb\u52a0 5 \u4e2a\u526f\u672c\uff0c\u800c\u57fa\u4e8e\u961f\u5217\u5927\u5c0f\u7684\u6307\u6807\u503c\u4ec5\u7ed9\u51fa 3 \u4e2a Pod\uff0c\u5219 HPA \u5c06\u4f7f\u7528\u8f83\u5927\u7684\u503c\u5e76\u6dfb\u52a0 5 \u4e2a Pod\u3002<\/p>\n<p>\u968f\u7740Kubernetes 1.18\u7684\u53d1\u5e03\uff0c\u4f60\u73b0\u5728\u6709\u80fd\u529b\u6765\u5b9a\u4e49scaleUp\u548cscaleDown\u65b9\u6848(https:\/\/kubernetes.io\/docs\/tasks\/run-application\/horizontal-Pod-autoscale\/#support-for-configurable-scaling-behavior)\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>behavior:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>scaleDown:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;stabilizationWindowSeconds:&nbsp;60&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;policies:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;-&nbsp;type:&nbsp;Percent&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;value:&nbsp;5&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;periodSeconds:&nbsp;20&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;-&nbsp;type:&nbsp;Pods&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;value:&nbsp;5&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;periodSeconds:&nbsp;60&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;selectPolicy:&nbsp;<span>Min<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>scaleUp:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;stabilizationWindowSeconds:&nbsp;0&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;policies:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;-&nbsp;type:&nbsp;Percent&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;value:&nbsp;100&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;periodSeconds:&nbsp;10&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u6b63\u5982\u60a8\u5728\u4e0a\u9762\u7684\u6e05\u5355\u4e2d\u770b\u5230\u7684\uff0c\u5b83\u6709\u4e24\u4e2a\u90e8\u5206\u3002\u7b2c\u4e00\u4e2a ( scaleDown) \u5b9a\u4e49\u7f29\u5c0f\u53c2\u6570\uff0c\u800c\u7b2c\u4e8c\u4e2a ( scaleUp) \u7528\u4e8e\u653e\u5927\u3002\u6bcf\u4e2a\u90e8\u5206\u90fd\u6709stabilizationWindowSeconds. \u8fd9\u6709\u52a9\u4e8e\u9632\u6b62\u5728\u526f\u672c\u6570\u91cf\u6301\u7eed\u6ce2\u52a8\u65f6\u51fa\u73b0\u6240\u8c13\u7684\u201c\u6296\u52a8\u201d(\u6216\u4e0d\u5fc5\u8981\u7684\u7f29\u653e)\u3002\u8fd9\u4e2a\u53c2\u6570\u672c\u8d28\u4e0a\u662f\u4f5c\u4e3a\u526f\u672c\u6570\u91cf\u6539\u53d8\u540e\u7684\u8d85\u65f6\u65f6\u95f4\u3002<\/p>\n<p>\u73b0\u5728\u8ba9\u6211\u4eec\u8c08\u8c08\u8fd9\u4e24\u8005\u7684\u7b56\u7565\u3002scaleDown\u7b56\u7565\u5141\u8bb8\u60a8\u6307\u5b9a\u5728type: Percent\u7279\u5b9a\u65f6\u95f4\u6bb5\u5185\u7f29\u51cf\u7684 Pod \u767e\u5206\u6bd4 \u3002\u5982\u679c\u8d1f\u8f7d\u5177\u6709\u5468\u671f\u6027\u73b0\u8c61\uff0c\u60a8\u5fc5\u987b\u505a\u7684\u662f\u964d\u4f4e\u767e\u5206\u6bd4\u5e76\u589e\u52a0\u6301\u7eed\u65f6\u95f4\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u968f\u7740\u8d1f\u8f7d\u7684\u51cf\u5c11\uff0cHPA \u4e0d\u4f1a\u7acb\u5373\u6740\u6b7b\u5927\u91cf Pod(\u6839\u636e\u5176\u516c\u5f0f)\uff0c\u800c\u662f\u4f1a\u9010\u6e10\u6740\u6b7b\u5bf9\u5e94\u7684Pod\u3002\u6b64\u5916\uff0c\u60a8\u53ef\u4ee5\u8bbe\u7f6etype: Pods\u5728\u6307\u5b9a\u65f6\u95f4\u6bb5\u5185\u5141\u8bb8 HPA \u6740\u6b7b\u7684\u6700\u5927 Pod \u6570\u91cf \u3002<\/p>\n<p>\u6ce8\u610fselectPolicy: Min\u53c2\u6570\u3002\u8fd9\u610f\u5473\u7740 HPA \u4f7f\u7528\u5f71\u54cd\u6700\u5c0f Pod \u6570\u91cf\u7684\u7b56\u7565\u3002\u56e0\u6b64\uff0c\u5982\u679c\u767e\u5206\u6bd4\u503c(\u4e0a\u4f8b\u4e2d\u7684 5%)\u5c0f\u4e8e\u6570\u5b57\u66ff\u4ee3\u503c(\u4e0a\u4f8b\u4e2d\u7684 5 \u4e2a Pod)\uff0cHPA \u5c06\u9009\u62e9\u767e\u5206\u6bd4\u503c\u3002\u76f8\u53cd\uff0cselectPolicy: Max\u7b56\u7565\u4f1a\u4ea7\u751f\u76f8\u53cd\u7684\u6548\u679c\u3002<\/p>\n<p>scaleUp\u90e8\u5206\u4e2d\u4f7f\u7528\u4e86\u7c7b\u4f3c\u7684\u53c2\u6570\u3002\u8bf7\u6ce8\u610f\uff0c\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u96c6\u7fa4\u5fc5\u987b(\u51e0\u4e4e)\u7acb\u5373\u6269\u5bb9\uff0c\u56e0\u4e3a\u5373\u4f7f\u662f\u8f7b\u5fae\u7684\u5ef6\u8fdf\u4e5f\u4f1a\u5f71\u54cd\u7528\u6237\u53ca\u5176\u4f53\u9a8c\u3002\u56e0\u6b64\uff0c\u5728\u672c\u8282\u4e2dStabilizationWindowsSeconds\u8bbe\u7f6e\u4e3a0\u3002\u5982\u679c\u8d1f\u8f7d\u5177\u6709\u5faa\u73af\u6a21\u5f0f\uff0cHPA\u53ef\u4ee5\u5728\u5fc5\u8981\u65f6\u5c06\u526f\u672c\u8ba1\u6570\u589e\u52a0\u5230maxReplicas(\u5982HPA\u6e05\u5355\u4e2d\u5b9a\u4e49\u7684)\u3002\u6211\u4eec\u7684\u7b56\u7565\u5141\u8bb8HPA\u6bcf10\u79d2(periodSeconds:10)\u5411\u5f53\u524d\u8fd0\u884c\u7684\u526f\u672c\u6dfb\u52a0\u591a\u8fbe100%\u7684\u526f\u672c\u3002<\/p>\n<p>\u6700\u540e\uff0c\u60a8\u53ef\u4ee5\u5c06selectPolicy\u53c2\u6570\u8bbe\u7f6eDisabled\u4e3a\u5173\u95ed\u7ed9\u5b9a\u65b9\u5411\u7684\u7f29\u653e\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>behavior:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>scaleDown:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;selectPolicy:&nbsp;Disabled&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5f53 HPA \u672a\u6309\u9884\u671f\u5de5\u4f5c\u65f6\uff0c\u624d\u4f1a\u4f7f\u7528\u7b56\u7565\u3002\u7b56\u7565\u5e26\u6765\u4e86\u7075\u6d3b\u6027\u7684\u540c\u65f6\uff0c\u4e5f\u4f7f\u914d\u7f6e\u6e05\u5355\u66f4\u96be\u638c\u63e1\u3002<\/p>\n<p>\u6700\u8fd1\uff0cHPA\u80fd\u591f\u8ddf\u8e2a\u4e00\u7ec4 Pod \u4e2d\u5355\u4e2a\u5bb9\u5668\u7684\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5(\u5728 Kubernetes 1.20 \u4e2d\u4f5c\u4e3a alpha \u529f\u80fd\u5f15\u5165)(https:\/\/kubernetes.io\/docs\/tasks\/run-application\/horizontal-Pod-autoscale\/#container-resource-metrics)\u3002<\/p>\n<h3>HPA\uff1a\u603b\u7ed3<\/h3>\n<p>\u8ba9\u6211\u4eec\u4ee5\u5b8c\u6574\u7684 HPA \u6e05\u5355\u793a\u4f8b\u7ed3\u675f\u672c\u6bb5\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;autoscaling\/v1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;HorizontalPodAutoscaler&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;worker&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>scaleTargetRef:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;apiVersion:&nbsp;apps\/v1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;kind:&nbsp;Deployment&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;worker&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>minReplicas:&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>maxReplicas:&nbsp;10&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metrics:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>-&nbsp;type:&nbsp;External&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;external:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;metric:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;queue_messages&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;target:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;type:&nbsp;AverageValue&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;averageValue:&nbsp;15&nbsp;<\/span><\/li>\n   \n  \n  <li><span>behavior:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;scaleDown:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;stabilizationWindowSeconds:&nbsp;60&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;policies:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;type:&nbsp;Percent&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;value:&nbsp;5&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;periodSeconds:&nbsp;20&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;type:&nbsp;Pods&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;value:&nbsp;5&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;periodSeconds:&nbsp;60&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;selectPolicy:&nbsp;<span>Min<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;scaleUp:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;stabilizationWindowSeconds:&nbsp;0&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;policies:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;type:&nbsp;Percent&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;value:&nbsp;100&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;periodSeconds:&nbsp;10&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0c\u6b64\u793a\u4f8b\u4ec5\u4f9b\u53c2\u8003\u3002\u60a8\u5c06\u9700\u8981\u5bf9\u5176\u8fdb\u884c\u8c03\u6574\u4ee5\u9002\u5e94\u60a8\u81ea\u5df1\u7684\u64cd\u4f5c\u7684\u5177\u4f53\u60c5\u51b5\u3002<\/p>\n<p>Horizontal Pod Autoscaler \u7b80\u4ecb\uff1aHPA \u975e\u5e38\u9002\u5408\u751f\u4ea7\u73af\u5883\u3002\u4f46\u662f\uff0c\u5728\u4e3a HPA \u9009\u62e9\u6307\u6807\u65f6\uff0c\u60a8\u5fc5\u987b\u8c28\u614e\u5e76\u5c3d\u91cf\u591a\u7684\u8003\u8651\u73b0\u72b6\u3002\u9519\u8bef\u7684\u5ea6\u91cf\u6807\u51c6\u6216\u9519\u8bef\u7684\u9608\u503c\u5c06\u5bfc\u81f4\u8d44\u6e90\u6d6a\u8d39(\u6765\u81ea\u4e0d\u5fc5\u8981\u7684\u526f\u672c)\u6216\u670d\u52a1\u964d\u7ea7(\u5982\u679c\u526f\u672c\u6570\u91cf\u4e0d\u591f)\u3002\u5bc6\u5207\u76d1\u89c6\u5e94\u7528\u7a0b\u5e8f\u7684\u884c\u4e3a\u5e76\u5bf9\u5176\u8fdb\u884c\u6d4b\u8bd5\uff0c\u76f4\u5230\u8fbe\u5230\u6b63\u786e\u7684\u5e73\u8861\u3002<\/p>\n<h2>\u5341\u4e8c\u3001VerticalPodAutoscaler<\/h2>\n<p>VPA(https:\/\/github.com\/kubernetes\/autoscaler\/tree\/master\/vertical-Pod-autoscaler)\u5206\u6790\u5bb9\u5668\u7684\u8d44\u6e90\u9700\u6c42\u5e76\u8bbe\u7f6e(\u5982\u679c\u542f\u7528\u4e86\u76f8\u5e94\u7684\u6a21\u5f0f)\u5b83\u4eec\u7684\u9650\u5236\u548c\u8bf7\u6c42\u3002<\/p>\n<p>\u5047\u8bbe\u60a8\u90e8\u7f72\u4e86\u4e00\u4e2a\u65b0\u7684\u5e94\u7528\u7a0b\u5e8f\u7248\u672c\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e9b\u65b0\u529f\u80fd\uff0c\u7ed3\u679c\u53d1\u73b0\uff0c\u6bd4\u5982\u8bf4\uff0c\u5bfc\u5165\u7684\u5e93\u662f\u4e00\u4e2a\u5de8\u5927\u7684\u8d44\u6e90\u6d88\u8017\u8005\uff0c\u6216\u8005\u4ee3\u7801\u6ca1\u6709\u5f97\u5230\u5f88\u597d\u7684\u4f18\u5316\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5e94\u7528\u7a0b\u5e8f\u8d44\u6e90\u9700\u6c42\u589e\u52a0\u4e86\u3002\u60a8\u5728\u6d4b\u8bd5\u671f\u95f4\u6ca1\u6709\u6ce8\u610f\u5230\u8fd9\u4e00\u70b9(\u56e0\u4e3a\u5f88\u96be\u50cf\u5728\u751f\u4ea7\u4e2d\u90a3\u6837\u52a0\u8f7d\u5e94\u7528\u7a0b\u5e8f)\u3002<\/p>\n<p>\u5f53\u7136\uff0c\u5728\u66f4\u65b0\u5f00\u59cb\u4e4b\u524d\uff0c\u76f8\u5173\u7684\u8bf7\u6c42\u548c\u9650\u5236\u5df2\u7ecf\u4e3a\u5e94\u7528\u7a0b\u5e8f\u8bbe\u7f6e\u597d\u4e86\u3002\u73b0\u5728\uff0c\u5e94\u7528\u7a0b\u5e8f\u8fbe\u5230\u5185\u5b58\u9650\u5236\uff0c\u5176Pod\u7531\u4e8eOOM\u800c\u88ab\u6740\u6b7b\u3002VPA\u53ef\u4ee5\u9632\u6b62\u8fd9\u79cd\u60c5\u51b5!\u4e4d\u4e00\u770b\uff0cVPA\u770b\u8d77\u6765\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u5de5\u5177\uff0c\u5e94\u8be5\u662f\u88ab\u5e7f\u6cdb\u7684\u4f7f\u7528\u7684\u3002\u4f46\u5728\u73b0\u5b9e\u751f\u6d3b\u4e2d\uff0c\u60c5\u51b5\u5e76\u975e\u662f\u5982\u6b64\uff0c\u4e0b\u9762\u4f1a\u7b80\u5355\u8bf4\u660e\u4e00\u4e0b\u3002<\/p>\n<p>\u4e3b\u8981\u95ee\u9898(\u5c1a\u672a\u89e3\u51b3)\u662fPod\u9700\u8981\u91cd\u65b0\u542f\u52a8\u624d\u80fd\u4f7f\u8d44\u6e90\u66f4\u6539\u751f\u6548\u3002\u5728\u672a\u6765\uff0cVPA\u5c06\u5728\u4e0d\u91cd\u542fPod\u7684\u60c5\u51b5\u4e0b\u5bf9\u5176\u8fdb\u884c\u4fee\u6539\uff0c\u4f46\u76ee\u524d\uff0c\u5b83\u6839\u672c\u65e0\u6cd5\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u4f46\u662f\u4e0d\u7528\u62c5\u5fc3\u3002\u5982\u679c\u60a8\u6709\u4e00\u4e2a\u201c\u7f16\u5199\u826f\u597d\u201d\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u4e14\u968f\u65f6\u51c6\u5907\u91cd\u65b0\u90e8\u7f72(\u4f8b\u5982\uff0c\u5b83\u6709\u5927\u91cf\u526f\u672c;\u5b83\u7684PodAntiAffinity\u3001PodDistributionBudget\u3001HorizontalPodAutoscaler\u90fd\u7ecf\u8fc7\u4ed4\u7ec6\u914d\u7f6e\uff0c\u7b49\u7b49)\uff0c\u90a3\u4e48\u8fd9\u5e76\u4e0d\u662f\u4ec0\u4e48\u5927\u95ee\u9898\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8(\u53ef\u80fd)\u751a\u81f3\u4e0d\u4f1a\u6ce8\u610f\u5230VPA\u6d3b\u52a8\u3002<\/p>\n<p>\u9057\u61be\u7684\u662f\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u5176\u4ed6\u4e0d\u592a\u4ee4\u4eba\u6109\u5feb\u7684\u60c5\u51b5\uff0c\u5982\uff1a\u5e94\u7528\u7a0b\u5e8f\u91cd\u65b0\u90e8\u7f72\u5f97\u4e0d\u592a\u597d\uff0c\u7531\u4e8e\u7f3a\u5c11\u8282\u70b9\uff0c\u526f\u672c\u7684\u6570\u91cf\u53d7\u5230\u9650\u5236\uff0c\u5e94\u7528\u7a0b\u5e8f\u4f5c\u4e3aStatefulSet\u8fd0\u884c\uff0c\u7b49\u7b49\u3002\u5728\u6700\u574f\u7684\u60c5\u51b5\u4e0b\uff0cPod\u7684\u8d44\u6e90\u6d88\u8017\u4f1a\u56e0\u8d1f\u8f7d\u589e\u52a0\u800c\u589e\u52a0\uff0cHPA\u5f00\u59cb\u6269\u5c55\u96c6\u7fa4\uff0c\u7136\u540e\u7a81\u7136\uff0cVPA\u5f00\u59cb\u4fee\u6539\u8d44\u6e90\u53c2\u6570\u5e76\u91cd\u65b0\u542f\u52a8Pod\u3002\u56e0\u6b64\uff0c\u9ad8\u8d1f\u8f7d\u5206\u5e03\u5728\u5176\u4f59\u7684Pod\u4e2d\u3002\u5176\u4e2d\u4e00\u4e9b\u53ef\u80fd\u4f1a\u5d29\u6e83\uff0c\u4f7f\u4e8b\u60c5\u53d8\u5f97\u66f4\u7cdf\uff0c\u5e76\u5bfc\u81f4\u5931\u8d25\u7684\u8fde\u9501\u53cd\u5e94\u3002<\/p>\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6df1\u5165\u4e86\u89e3\u5404\u79cd VPA \u64cd\u4f5c\u6a21\u5f0f\u5f88\u91cd\u8981\u3002\u8ba9\u6211\u4eec\u4ece\u6700\u7b80\u5355\u7684\u5f00\u59cb\u2014\u2014\u201cOff\u6a21\u5f0f\u201d\u3002<\/p>\n<h3>Off\u6a21\u5f0f\uff1a<\/h3>\n<p>\u8be5\u6a21\u5f0f\u6240\u505a\u7684\u53ea\u662f\u8ba1\u7b97Pod\u7684\u8d44\u6e90\u6d88\u8017\u5e76\u63d0\u51fa\u5efa\u8bae\u3002\u6211\u4eec\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u90fd\u4f7f\u7528\u8fd9\u79cd\u6a21\u5f0f(\u6211\u4eec\u5efa\u8bae\u4f7f\u7528\u8fd9\u79cd\u6a21\u5f0f)\u3002\u4f46\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u770b\u51e0\u4e2a\u4f8b\u5b50\u3002<\/p>\n<p>\u4e00\u4e9b\u57fa\u672c\u6e05\u5355\u5982\u4e0b\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;autoscaling.k8s.io\/v1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;VerticalPodAutoscaler&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;my-app-vpa&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>targetRef:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;apiVersion:&nbsp;<span>\"apps\/v1\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;kind:&nbsp;Deployment&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;my-app&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>updatePolicy:&nbsp;&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;updateMode:&nbsp;<span>\"Recreate\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;containerPolicies:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;containerName:&nbsp;<span>\"*\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;minAllowed:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;100m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;250Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;maxAllowed:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;500Mi&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;controlledResources:&nbsp;[<span>\"cpu\"<\/span><span>,&nbsp;<\/span><span>\"memory\"<\/span><span>]&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;controlledValues:&nbsp;RequestsAndLimits&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u6211\u4eec\u4e0d\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u6b64\u6e05\u5355\u7684\u53c2\u6570\uff1a\u6587\u7ae0(https:\/\/povilasv.me\/vertical-Pod-autoscaling-the-definitive-guide\/)\u8be6\u7ec6\u63cf\u8ff0\u4e86 VPA \u7684\u529f\u80fd\u548c\u7ec6\u8282\u3002\u7b80\u800c\u8a00\u4e4b\uff0c\u6211\u4eec\u6307\u5b9a VPA \u76ee\u6807 ( targetRef) \u5e76\u9009\u62e9\u66f4\u65b0\u7b56\u7565\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u6211\u4eec\u6307\u5b9a\u4e86 VPA \u53ef\u4ee5\u4f7f\u7528\u7684\u8d44\u6e90\u7684\u4e0a\u9650\u548c\u4e0b\u9650\u3002\u4e3b\u8981\u5173\u6ce8updateMode\u90e8\u5206\u3002\u5728\u201c\u91cd\u65b0\u521b\u5efa\u201d\u6216\u201c\u81ea\u52a8\u201d\u6a21\u5f0f\u4e0b\uff0cVPA \u5c06\u91cd\u65b0\u521b\u5efa Pod \uff0c\u56e0\u6b64\u9700\u8981\u8003\u8651\u7531\u6b64\u5e26\u6765\u7684\u77ed\u6682\u505c\u670d\u98ce\u9669(\u76f4\u5230\u4e0a\u8ff0\u7528\u4e8e Pod\u7684 \u8d44\u6e90\u53c2\u6570\u66f4\u65b0\u7684\u8865\u4e01\u53ef\u7528)\u3002\u7531\u4e8e\u6211\u4eec\u4e0d\u60f3\u8981\u5b83\uff0c\u6211\u4eec\u4f7f\u7528\u201coff\u201d\u6a21\u5f0f\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;autoscaling.k8s.io\/v1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;VerticalPodAutoscaler&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;my-app-vpa&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>targetRef:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;apiVersion:&nbsp;<span>\"apps\/v1\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;kind:&nbsp;Deployment&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;<span>name<\/span><span>:&nbsp;my-app&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>updatePolicy:&nbsp;&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;updateMode:&nbsp;<span>\"Off\"<\/span><span>&nbsp;&nbsp;&nbsp;#&nbsp;!!!&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>resourcePolicy:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;containerPolicies:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;containerName:&nbsp;<span>\"*\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;controlledResources:&nbsp;[<span>\"cpu\"<\/span><span>,&nbsp;<\/span><span>\"memory\"<\/span><span>]&nbsp;<\/span><\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>VPA \u5f00\u59cb\u6536\u96c6\u6307\u6807\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528kubectl describe vpa\u547d\u4ee4\u67e5\u770b\u5efa\u8bae(\u53ea\u9700\u8ba9 VPA \u8fd0\u884c\u51e0\u5206\u949f\u5373\u53ef)\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>Recommendation:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;Container&nbsp;Recommendations:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;Container&nbsp;<span>Name<\/span><span>:&nbsp;nginx&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;<span>Lower<\/span><span>&nbsp;Bound:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cpu:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Memory:&nbsp;52428800&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;Target:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cpu:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Memory:&nbsp;52428800&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;Uncapped&nbsp;Target:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cpu:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Memory:&nbsp;52428800&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;<span>Upper<\/span><span>&nbsp;Bound:&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cpu:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25m&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Memory:&nbsp;52428800&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u8fd0\u884c\u51e0\u5929(\u4e00\u5468\u3001\u4e00\u4e2a\u6708\u7b49)\u540e\uff0cVPA \u5efa\u8bae\u5c06\u66f4\u52a0\u51c6\u786e\u3002\u7136\u540e\u662f\u5728\u5e94\u7528\u7a0b\u5e8f\u6e05\u5355\u4e2d\u8c03\u6574\u9650\u5236\u7684\u6700\u4f73\u65f6\u673a\u3002\u8fd9\u6837\uff0c\u60a8\u53ef\u4ee5\u907f\u514d\u7531\u4e8e\u7f3a\u4e4f\u8d44\u6e90\u800c\u5bfc\u81f4\u7684 OOM \u7ec8\u6b62\u5e76\u8282\u7701\u57fa\u7840\u8bbe\u65bd(\u5982\u679c\u521d\u59cb\u8bf7\u6c42\/\u9650\u5236\u592a\u9ad8)\u3002<\/p>\n<p>\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u8c08\u8c08\u4f7f\u7528 VPA \u7684\u4e00\u4e9b\u7ec6\u8282\u3002<\/p>\n<h3>\u5176\u4ed6 VPA \u6a21\u5f0f\uff1a<\/h3>\n<p>\u8bf7\u6ce8\u610f\uff0c\u5728\u201cInitial\u201d\u6a21\u5f0f\u4e0b\uff0cVPA \u5728 Pod \u542f\u52a8\u65f6\u5206\u914d\u8d44\u6e90\uff0c\u4ee5\u540e\u4e0d\u518d\u66f4\u6539\u5b83\u4eec\u3002\u56e0\u6b64\uff0c\u5982\u679c\u8fc7\u53bb\u4e00\u5468\u7684\u8d1f\u8f7d\u76f8\u5bf9\u8f83\u4f4e\uff0cVPA \u5c06\u4e3a\u65b0\u521b\u5efa\u7684 Pod \u8bbe\u7f6e\u8f83\u4f4e\u7684\u8bf7\u6c42\/\u9650\u5236\u3002\u5982\u679c\u8d1f\u8f7d\u7a81\u7136\u589e\u52a0\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u95ee\u9898\uff0c\u56e0\u4e3a\u8bf7\u6c42\/\u9650\u5236\u5c06\u8fdc\u4f4e\u4e8e\u6b64\u7c7b\u8d1f\u8f7d\u6240\u9700\u7684\u6570\u91cf\u3002\u5982\u679c\u60a8\u7684\u8d1f\u8f7d\u5747\u5300\u5206\u5e03\u5e76\u4ee5\u7ebf\u6027\u65b9\u5f0f\u589e\u957f\uff0c\u5219\u6b64\u6a21\u5f0f\u53ef\u80fd\u4f1a\u6d3e\u4e0a\u7528\u573a\u3002<\/p>\n<p>\u5728\u201cAuto\u201d\u6a21\u5f0f\u4e0b\uff0cVPA \u91cd\u65b0\u521b\u5efa Pod\u3002\u56e0\u6b64\uff0c\u5e94\u7528\u7a0b\u5e8f\u5fc5\u987b\u6b63\u786e\u5904\u7406\u91cd\u65b0\u542f\u52a8\u3002\u5982\u679c\u5b83\u4e0d\u80fd\u6b63\u5e38\u5173\u95ed(\u5373\u901a\u8fc7\u6b63\u786e\u5173\u95ed\u73b0\u6709\u8fde\u63a5\u7b49)\uff0c\u60a8\u5f88\u53ef\u80fd\u4f1a\u6355\u83b7\u4e00\u4e9b\u53ef\u907f\u514d\u7684 5XX \u9519\u8bef\u3002\u5f88\u5c11\u5efa\u8bae\u4f7f\u7528\u5e26\u6709 StatefulSet \u7684 Auto \u6a21\u5f0f\uff1a\u60f3\u8c61\u4e00\u4e0b VPA \u8bd5\u56fe\u5c06 PostgreSQL \u8d44\u6e90\u6dfb\u52a0\u5230\u751f\u4ea7\u4e2d\u2026\u2026<\/p>\n<p>\u81f3\u4e8e\u5f00\u53d1\u73af\u5883\uff0c\u60a8\u53ef\u4ee5\u81ea\u7531\u8bd5\u9a8c\u4ee5\u627e\u5230\u60a8\u53ef\u4ee5\u63a5\u53d7\u7684(\u7a0d\u540e)\u5728\u751f\u4ea7\u4e2d\u4f7f\u7528\u7684\u8d44\u6e90\u7ea7\u522b\u3002\u5047\u8bbe\u60a8\u60f3\u5728\u201cInitial\u201d\u6a21\u5f0f\u4e0b\u4f7f\u7528 VPA\uff0c\u5e76\u4e14\u6211\u4eec\u5728Redis\u96c6\u7fa4\u4e2d\u4f7f\u7528maxmemory\u53c2\u6570 \u3002\u60a8\u5f88\u53ef\u80fd\u9700\u8981\u66f4\u6539\u5b83\u4ee5\u6839\u636e\u60a8\u7684\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002\u95ee\u9898\u662f Redis \u4e0d\u5173\u5fc3 cgroups \u7ea7\u522b\u7684\u9650\u5236\u3002<\/p>\n<p>\u6362\u53e5\u8bdd\u8bf4\uff0c\u5982\u679c\u60a8\u7684 Pod \u7684\u5185\u5b58\u4e0a\u9650\u4e3a 1GB\uff0c\u90a3\u4e48maxmemory \u8bbe\u7f6e\u7684\u662f2GB \uff0c\u60a8\u5c06\u9762\u4e34\u5f88\u5927\u7684\u98ce\u9669\u3002\u4f46\u662f\u4f60\u600e\u4e48\u80fd\u8bbe\u7f6emaxmemory\u6210\u548climit\u4e00\u6837\u5462?\u55ef\uff0c\u6709\u529e\u6cd5!\u60a8\u53ef\u4ee5\u4f7f\u7528 VPA \u63a8\u8350\u7684\u503c\uff1a<\/p>\n<pre>\n  \n \n <ol>\n   \n  \n  <li><span><span>apiVersion:&nbsp;apps\/v1&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>kind:&nbsp;Deployment&nbsp;<\/span><\/li>\n   \n  \n  <li><span>metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span><span>name<\/span><span>:&nbsp;redis&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>labels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;app:&nbsp;redis&nbsp;<\/span><\/li>\n   \n  \n  <li><span>spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>replicas:&nbsp;1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>selector:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;matchLabels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;app:&nbsp;redis&nbsp;<\/span><\/li>\n   \n  \n  <li><span>template:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;metadata:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;labels:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;app:&nbsp;redis&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;spec:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;containers:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;<span>name<\/span><span>:&nbsp;redis&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;image:&nbsp;redis:6.2.1&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ports:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;containerPort:&nbsp;6379&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resources:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;requests:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;<span>\"100Mi\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;<span>\"256m\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;limits:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memory:&nbsp;<span>\"100Mi\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;cpu:&nbsp;<span>\"256m\"<\/span><span>&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;env:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;<span>name<\/span><span>:&nbsp;MY_MEM_REQUEST&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;valueFrom:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resourceFieldRef:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;containerName:&nbsp;app&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resource:&nbsp;requests.memory&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;<span>name<\/span><span>:&nbsp;MY_MEM_LIMIT&nbsp;<\/span><\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;valueFrom:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resourceFieldRef:&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;containerName:&nbsp;app&nbsp;<\/span><\/li>\n   \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resource:&nbsp;limits.memory&nbsp;<\/span><\/li>\n  \n \n <\/ol><\/pre>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u73af\u5883\u53d8\u91cf\u6765\u83b7\u53d6\u5185\u5b58\u9650\u5236(\u5e76\u4ece\u5e94\u7528\u7a0b\u5e8f\u9700\u6c42\u4e2d\u51cf\u53bb 10%)\u5e76\u5c06\u7ed3\u679c\u503c\u8bbe\u7f6e\u4e3amaxmemory\u3002\u60a8\u53ef\u80fd\u9700\u8981\u5bf9sed\u7528\u4e8e\u5904\u7406 Redis \u914d\u7f6e\u7684 init \u5bb9\u5668\u505a\u4e00\u4e9b\u4e8b\u60c5\uff0c\u56e0\u4e3a\u9ed8\u8ba4\u7684 Redis \u5bb9\u5668\u6620\u50cf\u4e0d\u652f\u6301maxmemory\u4f7f\u7528\u73af\u5883\u53d8\u91cf\u8fdb\u884c\u4f20\u9012\u3002\u5c3d\u7ba1\u5982\u6b64\uff0c\u8fd9\u4e2a\u89e3\u51b3\u65b9\u6848\u8fd8\u662f\u5f88\u5b9e\u7528\u7684\u3002<\/p>\n<p>\u6700\u540e\uff0c\u6211\u60f3\u5c06\u60a8\u7684\u6ce8\u610f\u529b\u8f6c\u79fb\u5230 VPA \u4e00\u6b21\u6027\u9a71\u9010\u6240\u6709 DaemonSet Pod \u7684\u4e8b\u5b9e\u3002\u6211\u4eec\u76ee\u524d\u6b63\u5728\u5f00\u53d1\u4fee\u590d\u6b64\u95ee\u9898\u7684\u8865\u4e01(https:\/\/github.com\/kubernetes\/kubernetes\/pull\/98307)\u3002<\/p>\n<h3>\u6700\u7ec8\u7684 VPA \u5efa\u8bae\uff1a<\/h3>\n<p>\u201cOFF\u201d\u6a21\u5f0f\u9002\u7528\u4e8e\u5927\u591a\u6570\u60c5\u51b5\u3002\u60a8\u53ef\u4ee5\u5728\u5f00\u53d1\u73af\u5883\u4e2d\u5c1d\u8bd5\u201cAuto\u201d\u548c\u201cInitial\u201d\u6a21\u5f0f\u3002<\/p>\n<p>\u53ea\u6709\u5728\u60a8\u5df2\u7ecf\u79ef\u7d2f\u4e86\u5927\u91cf\u7684\u7ecf\u9a8c\u5e76\u5bf9\u5176\u8fdb\u884c\u4e86\u5f7b\u5e95\u6d4b\u8bd5\u7684\u60c5\u51b5\u4e0b\uff0c\u624d\u80fd\u5728\u751f\u4ea7\u4e2d\u4f7f\u7528VPA\u3002\u6b64\u5916\uff0c\u4f60\u5fc5\u987b\u6e05\u695a\u5730\u4e86\u89e3\u4f60\u5728\u505a\u4ec0\u4e48\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u8981\u8fd9\u6837\u505a\u3002<\/p>\n<p>\u4e0e\u6b64\u540c\u65f6\uff0c\u6211\u4eec\u70ed\u5207\u671f\u5f85 Pod \u8d44\u6e90\u7684\u70ed(\u514d\u91cd\u542f)\u66f4\u65b0\u529f\u80fd\u3002<\/p>\n<p>\u8bf7\u6ce8\u610f\uff0c\u540c\u65f6\u4f7f\u7528 HPA \u548c VPA \u5b58\u5728\u4e00\u4e9b\u9650\u5236\u3002\u4f8b\u5982\uff0c\u5982\u679c\u57fa\u4e8e CPU \u6216\u57fa\u4e8e\u5185\u5b58\u7684\u6307\u6807\u7528\u4f5c\u89e6\u53d1\u5668\uff0c\u5219 VPA \u4e0d\u5e94\u4e0e HPA \u4e00\u8d77\u4f7f\u7528\u3002\u539f\u56e0\u662f\u5f53\u8fbe\u5230\u9608\u503c\u65f6\uff0cVPA \u4f1a\u589e\u52a0\u8d44\u6e90\u8bf7\u6c42\/\u9650\u5236\uff0c\u800c HPA \u4f1a\u6dfb\u52a0\u65b0\u526f\u672c\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u8d1f\u8f7d\u5c06\u6025\u5267\u4e0b\u964d\uff0c\u5e76\u4e14\u8be5\u8fc7\u7a0b\u5c06\u53cd\u5411\u8fdb\u884c\uff0c\u4ece\u800c\u5bfc\u81f4\u201c\u6296\u52a8\u201d\u3002\u5b98\u65b9\u6587\u4ef6(https:\/\/github.com\/kubernetes\/autoscaler\/tree\/master\/vertical-Pod-autoscaler#known-limitations)\u66f4\u6e05\u695a\u5730\u8bf4\u660e\u4e86\u73b0\u6709\u7684\u9650\u5236\u3002\u3002<\/p>\n<h3>\u7ed3\u8bba\uff1a<\/h3>\n<p>\u6211\u4eec\u5206\u4eab\u4e86\u4e00\u4e9b Kubernetes \u9ad8\u53ef\u7528\u90e8\u7f72\u5e94\u7528\u7684\u7684\u4e00\u4e9b\u5efa\u8bae\u4ee5\u53ca\u76f8\u5173\u7684\u6848\u4f8b\uff0c\u8fd9\u4e9b\u673a\u5236\u6709\u52a9\u4e8e\u90e8\u7f72\u9ad8\u53ef\u7528\u6027\u5e94\u7528\u7a0b\u5e8f\u3002\u6211\u4eec\u8ba8\u8bba\u4e86\u8c03\u5ea6\u5668\u64cd\u4f5c\u3001\u66f4\u65b0\u7b56\u7565\u3001\u4f18\u5148\u7ea7\u3001\u63a2\u9488\u7b49\u65b9\u9762\u3002\u6700\u540e\u4e00\u90e8\u5206\u6211\u4eec\u6df1\u5165\u8ba8\u8bba\u4e86\u5269\u4e0b\u7684\u4e09\u4e2a\u5173\u952e\u4e3b\u9898\uff1aPodDisruptionBudget\u3001HorizontalPodAutoscaler \u548c VerticalPodAutoscaler\u3002<\/p>\n<p>\u95ee\u9898\u4e2d\u63d0\u5230\u7684\u5927\u91cf\u6848\u4f8b\u90fd\u662f\u57fa\u4e8e\u6211\u4eec\u751f\u6210\u7684\u771f\u5b9e\u573a\u666f\uff0c\u5982\u4f7f\u7528\uff0c\u8bf7\u6839\u636e\u81ea\u751f\u7684\u73af\u5883\u8fdb\u884c\u8c03\u6574\u3002<\/p>\n<p>\u901a\u8fc7\u672c\u6587\uff0c\u6211\u4eec\u4e5f\u5e0c\u671b\u8bfb\u8005\u80fd\u591f\u6839\u636e\u81ea\u6709\u7684\u73af\u5883\u8fdb\u884c\u9a8c\u8bc1\uff0c\u80fd\u591f\u4e00\u8d77\u5206\u4eab\u5404\u81ea\u7684\u751f\u6210\u7ecf\u9a8c\uff0c\u80fd\u5076\u4e00\u8d77\u63a8\u8fdbKubernetes\u76f8\u5173\u6280\u672f\u7684\u53d1\u5c55\u4e0e\u8fdb\u6b65\u3002\u518d\u6b21\u4e5f\u611f\u8c22\u8bfb\u8005\u80fd\u591f\u82b1\u8d39\u5927\u91cf\u7684\u65f6\u95f4\u8ba4\u771f\u8bfb\u5b8c\u672c\u6587\u3002<\/p>\n<p>\u53c2\u8003\u6587\u7ae0\uff1a&nbsp;<\/p>\n<ul>\n<li>https:\/\/blog.flant.com\/best-practices-for-deploying-highly-available-apps-in-kubernetes-part-1\/<\/li>\n<li>https:\/\/blog.flant.com\/best-practices-for-deploying-highly-available-apps-in-kubernetes-part-2\/<\/li>\n<li>Migrating your app to Kubernetes: what to do with files?<\/li>\n<li>ConfigMaps in Kubernetes: how they work and what you should remember<\/li>\n<li>Best practices for deploying highly available apps in Kubernetes. Part 1<\/li>\n<li>Comparing Ingress controllers for Kubernetes<\/li>\n<li>How we enjoyed upgrading a bunch of Kubernetes clusters from v1.16 to v1.19<\/li>\n<li>Best practices for deploying highly available apps in Kubernetes. Part 2<\/li>\n<\/ul>\n<p><span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Kubernetes\u4e2d\u90e8\u7f72\u9ad8\u53ef\u7528\u5e94\u7528\u7a0b\u5e8f\u7684\u5b9e\u8df5 \u4f5c\u8005\uff1a\u795d\u7965 2021-11-02 17:27:40 \u4e91\u8ba1\u7b97  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55],"tags":[],"class_list":["post-223967","post","type-post","status-publish","format-standard","hentry","category-cloud-phone"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/223967","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=223967"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/223967\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=223967"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=223967"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=223967"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}