{"id":37882,"date":"2025-05-18T09:31:02","date_gmt":"2025-05-18T01:31:02","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/37882.html"},"modified":"2025-05-18T09:31:02","modified_gmt":"2025-05-18T01:31:02","slug":"java%e4%ba%91%e5%8e%9f%e7%94%9f%e5%ba%94%e7%94%a8%ef%bc%9a%e8%ae%a9%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%83%8f%e7%ab%a0%e9%b1%bc%e8%a7%a6%e6%89%8b%e8%88%ac%e8%87%aa%e5%8a%a8%e4%bc%b8%e7%bc%a9%e7%9a%84","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/37882.html","title":{"rendered":"Java\u4e91\u539f\u751f\u5e94\u7528\uff1a\u8ba9\u670d\u52a1\u5668\u50cf\u7ae0\u9c7c\u89e6\u624b\u822c\u81ea\u52a8\u4f38\u7f29\u7684\u7ec8\u6781\u6307\u5357"},"content":{"rendered":"<h3>\u4e00\u3001\u4e91\u539f\u751f\u81ea\u52a8\u6269\u7f29\u5bb9&#xff1a;\u4e00\u573a\u300c\u7ae0\u9c7c\u4e0e\u6d41\u91cf\u7684\u535a\u5f08\u300d<\/h3>\n<h4>1.1 \u4f20\u7edf\u6269\u5bb9&#xff1a;\u50cf\u5728\u73a9\u300c\u4fc4\u7f57\u65af\u65b9\u5757\u300d<\/h4>\n<p><span class=\"token comment\">\/\/ \u4f20\u7edf\u6269\u5bb9\u7684\u201c\u4fc4\u7f57\u65af\u65b9\u5757\u201d\u5f0f\u4ee3\u7801&#xff08;\u5371\u9669\u793a\u4f8b&#xff01;&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">LegacyScaler<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ 1. \u624b\u52a8\u62fc\u51d1\u8d44\u6e90<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">scaleManually<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">cpuUtilization<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">80<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u624b\u52a8\u542f\u52a8\u65b0\u5b9e\u4f8b<\/span><br \/>\n            <span class=\"token function\">runShellCommand<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;kubectl scale deployment my-app &#8211;replicas&#061;5&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 2. \u4eba\u5de5\u76d1\u63a7\u62a5\u8b66<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;Scheduled<\/span><span class=\"token punctuation\">(<\/span>fixedRate <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">60_000<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">monitor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">memoryUsage<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">90<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">sendAlert<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5185\u5b58\u7206\u8868&#xff01;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u51cc\u66683\u70b9\u7684\u77ed\u4fe1\u8f70\u70b8<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6838\u5fc3\u75db\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u4eba\u5de5\u54cd\u5e94\u5ef6\u8fdf&#xff1a;\u6d41\u91cf\u7a81\u589e\u65f6&#xff0c;\u624b\u52a8\u6269\u5bb9\u53ef\u80fd\u5bfc\u81f4\u670d\u52a1\u96ea\u5d29\u3002<\/li>\n<li>\u8d44\u6e90\u6d6a\u8d39&#xff1a;\u4f4e\u5cf0\u671f\u4ecd\u8fd0\u884c\u7740\u201c\u50f5\u5c38\u5b9e\u4f8b\u201d\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>1.2 \u4e91\u539f\u751f\u81ea\u52a8\u6269\u7f29\u5bb9&#xff1a;\u7ed9\u5e94\u7528\u88c5\u4e2a\u300c\u667a\u80fd\u80ba\u300d<\/h4>\n<p><span class=\"token comment\"># Kubernetes HPA\u914d\u7f6e&#xff08;\u6838\u5fc3\u4ee3\u7801&#xff09;<\/span><br \/>\n<span class=\"token key atrule\">apiVersion<\/span><span class=\"token punctuation\">:<\/span> autoscaling\/v2beta2<br \/>\n<span class=\"token key atrule\">kind<\/span><span class=\"token punctuation\">:<\/span> HorizontalPodAutoscaler<br \/>\n<span class=\"token key atrule\">metadata<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> java<span class=\"token punctuation\">&#8211;<\/span>app<span class=\"token punctuation\">&#8211;<\/span>hpa<br \/>\n<span class=\"token key atrule\">spec<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token key atrule\">scaleTargetRef<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token key atrule\">apiVersion<\/span><span class=\"token punctuation\">:<\/span> apps\/v1<br \/>\n    <span class=\"token key atrule\">kind<\/span><span class=\"token punctuation\">:<\/span> Deployment<br \/>\n    <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> java<span class=\"token punctuation\">&#8211;<\/span>app<span class=\"token punctuation\">&#8211;<\/span>deployment<br \/>\n  <span class=\"token key atrule\">minReplicas<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">1<\/span> <span class=\"token comment\"># \u6700\u5c0f\u526f\u672c\u6570<\/span><br \/>\n  <span class=\"token key atrule\">maxReplicas<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span> <span class=\"token comment\"># \u6700\u5927\u526f\u672c\u6570<\/span><br \/>\n  <span class=\"token key atrule\">metrics<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">type<\/span><span class=\"token punctuation\">:<\/span> Resource<br \/>\n    <span class=\"token key atrule\">resource<\/span><span class=\"token punctuation\">:<\/span><br \/>\n      <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> cpu <span class=\"token comment\"># \u76d1\u63a7CPU\u8d44\u6e90<\/span><br \/>\n      <span class=\"token key atrule\">target<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">type<\/span><span class=\"token punctuation\">:<\/span> Utilization<br \/>\n        <span class=\"token key atrule\">averageUtilization<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">60<\/span> <span class=\"token comment\"># CPU\u8d85\u8fc760%\u89e6\u53d1\u6269\u5bb9<\/span><br \/>\n  <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">type<\/span><span class=\"token punctuation\">:<\/span> Object<br \/>\n    <span class=\"token key atrule\">object<\/span><span class=\"token punctuation\">:<\/span><br \/>\n      <span class=\"token key atrule\">target<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">apiVersion<\/span><span class=\"token punctuation\">:<\/span> metrics.k8s.io\/v1beta1<br \/>\n        <span class=\"token key atrule\">kind<\/span><span class=\"token punctuation\">:<\/span> ExternalMetric<br \/>\n        <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> custom_request_latency <span class=\"token comment\"># \u81ea\u5b9a\u4e49\u6307\u6807&#xff1a;\u8bf7\u6c42\u5ef6\u8fdf<\/span><br \/>\n      <span class=\"token key atrule\">metricName<\/span><span class=\"token punctuation\">:<\/span> request_latency<br \/>\n      <span class=\"token key atrule\">target<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">type<\/span><span class=\"token punctuation\">:<\/span> AverageValue<br \/>\n        <span class=\"token key atrule\">averageValue<\/span><span class=\"token punctuation\">:<\/span> 200m <span class=\"token comment\"># \u5e73\u5747\u5ef6\u8fdf\u8d85\u8fc7200ms\u89e6\u53d1\u6269\u5bb9<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\u591a\u6307\u6807\u51b3\u7b56&#xff1a;CPU&#043;\u81ea\u5b9a\u4e49\u5ef6\u8fdf\u6307\u6807\u8054\u5408\u51b3\u7b56\u3002<\/li>\n<li>\u5f39\u6027\u8fb9\u754c&#xff1a;minReplicas\/maxReplicas\u9632\u6b62\u8fc7\u5ea6\u6269\u7f29\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e8c\u3001\u76d1\u63a7\u6307\u6807&#xff1a;\u6293\u4f4f\u5e94\u7528\u7684\u300c\u751f\u547d\u4f53\u5f81\u300d<\/h3>\n<h4>2.1 \u57fa\u7840\u6307\u6807&#xff1a;CPU\u3001\u5185\u5b58\u3001\u8bf7\u6c42\u5ef6\u8fdf<\/h4>\n<p><span class=\"token comment\">\/\/ Spring Boot Actuator\u66b4\u9732\u6307\u6807&#xff08;\u6838\u5fc3\u4ee3\u7801&#xff09;<\/span><br \/>\n<span class=\"token annotation punctuation\">&#064;SpringBootApplication<\/span><br \/>\n<span class=\"token annotation punctuation\">&#064;EnableActuator<\/span> <span class=\"token comment\">\/\/ \u542f\u7528\u76d1\u63a7\u7aef\u70b9<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">MonitoringApp<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">SpringApplication<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">run<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">MonitoringApp<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">,<\/span> args<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u81ea\u5b9a\u4e49\u6307\u6807&#xff1a;\u6570\u636e\u5e93\u8fde\u63a5\u6570<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">CustomMetrics<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Gauge<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> DB_CONNECTIONS <span class=\"token operator\">&#061;<\/span><br \/>\n        <span class=\"token class-name\">Gauge<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;db_connections&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> dataSource<span class=\"token punctuation\">.<\/span><span class=\"token function\">getConnectionCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ JVM\u5185\u5b58\u76d1\u63a7<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Gauge<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Double<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> HEAP_USAGE <span class=\"token operator\">&#061;<\/span><br \/>\n        <span class=\"token class-name\">Gauge<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;heap_usage_percent&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Runtime<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getRuntime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">totalMemory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token operator\">&#8211;<\/span> <span class=\"token class-name\">Runtime<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getRuntime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">freeMemory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token operator\">\/<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token class-name\">Runtime<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getRuntime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">totalMemory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>Gauge&#xff1a;\u5b9e\u65f6\u76d1\u63a7\u52a8\u6001\u6570\u503c&#xff08;\u5982\u8fde\u63a5\u6570&#xff09;\u3002<\/li>\n<li>Heap Usage&#xff1a;\u8ba1\u7b97\u5806\u5185\u5b58\u4f7f\u7528\u767e\u5206\u6bd4\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>2.2 \u9ad8\u7ea7\u6307\u6807&#xff1a;\u8bf7\u6c42\u6210\u529f\u7387\u3001\u9519\u8bef\u7387\u3001\u961f\u5217\u957f\u5ea6<\/h4>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528Micrometer\u7edf\u8ba1HTTP\u8bf7\u6c42\u6210\u529f\u7387&#xff08;\u6838\u5fc3\u4ee3\u7801&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">RequestCounter<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Counter<\/span> REQUESTS <span class=\"token operator\">&#061;<\/span><br \/>\n        <span class=\"token class-name\">Counter<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;http_requests_total&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">tag<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;status&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;success&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Counter<\/span> ERRORS <span class=\"token operator\">&#061;<\/span><br \/>\n        <span class=\"token class-name\">Counter<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">builder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;http_requests_total&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">tag<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;status&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;error&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">register<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">handleRequest<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u5904\u7406\u903b\u8f91<\/span><br \/>\n            REQUESTS<span class=\"token punctuation\">.<\/span><span class=\"token function\">increment<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            ERRORS<span class=\"token punctuation\">.<\/span><span class=\"token function\">increment<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">throw<\/span> e<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>Tag\u5206\u7c7b&#xff1a;\u901a\u8fc7status\u6807\u7b7e\u533a\u5206\u6210\u529f\/\u5931\u8d25\u8bf7\u6c42\u3002<\/li>\n<li>\u9519\u8bef\u7387\u8ba1\u7b97&#xff1a;ERRORS.count() \/ (REQUESTS.count() &#043; ERRORS.count())\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e09\u3001\u6269\u7f29\u5bb9\u7b56\u7565&#xff1a;\u5199\u4e2a\u300c\u7ae0\u9c7c\u7684\u51b3\u7b56\u5927\u8111\u300d<\/h3>\n<h4>3.1 \u57fa\u7840\u7b56\u7565&#xff1a;\u9608\u503c\u89e6\u53d1&#xff08;CPU&gt;80%\u5c31\u6269\u5bb9&#xff09;<\/h4>\n<p><span class=\"token comment\">\/\/ \u81ea\u52a8\u6269\u5bb9\u903b\u8f91\u793a\u4f8b&#xff08;\u6838\u5fc3\u4ee3\u7801&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AutoScaler<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">KubernetesClient<\/span> client<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token keyword\">int<\/span> targetReplicas<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">scaleBasedOnCPU<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">double<\/span> currentCPU <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fetchCurrentCPUUsage<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u83b7\u53d6\u5f53\u524dCPU\u5229\u7528\u7387<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>currentCPU <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0.8<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ CPU\u8d85\u8fc780%<\/span><br \/>\n            <span class=\"token keyword\">int<\/span> newReplicas <span class=\"token operator\">&#061;<\/span> targetReplicas <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6269\u5bb92\u4e2a\u5b9e\u4f8b<\/span><br \/>\n            client<span class=\"token punctuation\">.<\/span><span class=\"token function\">apps<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">deployments<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">withName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;my-app&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">scale<\/span><span class=\"token punctuation\">(<\/span>newReplicas<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            log<span class=\"token punctuation\">.<\/span><span class=\"token function\">info<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6269\u5bb9\u5230{}\u4e2a\u5b9e\u4f8b&#xff0c;CPU\u5df2\u7206\u8868&#xff01;&#034;<\/span><span class=\"token punctuation\">,<\/span> newReplicas<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>currentCPU <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0.3<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/\/ CPU\u4f4e\u4e8e30%<\/span><br \/>\n            <span class=\"token keyword\">int<\/span> newReplicas <span class=\"token operator\">&#061;<\/span> targetReplicas <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7f29\u5bb91\u4e2a\u5b9e\u4f8b<\/span><br \/>\n            client<span class=\"token punctuation\">.<\/span><span class=\"token function\">apps<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">deployments<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">withName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;my-app&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">scale<\/span><span class=\"token punctuation\">(<\/span>newReplicas<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            log<span class=\"token punctuation\">.<\/span><span class=\"token function\">info<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7f29\u5bb9\u5230{}\u4e2a\u5b9e\u4f8b&#xff0c;CPU\u7a7a\u95f2\u4e2d&#8230;&#034;<\/span><span class=\"token punctuation\">,<\/span> newReplicas<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\u6b65\u957f\u63a7\u5236&#xff1a;&#043;2\/-1\u9632\u6b62\u9891\u7e41\u9707\u8361\u3002<\/li>\n<li>\u65e5\u5fd7\u8bb0\u5f55&#xff1a;\u4fbf\u4e8e\u4e8b\u540e\u5206\u6790\u6269\u7f29\u5bb9\u51b3\u7b56\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>3.2 \u9884\u70ed\u673a\u5236&#xff1a;\u65b0\u5b9e\u4f8b\u4e0a\u7ebf\u524d\u7684\u300c\u70ed\u8eab\u8bad\u7ec3\u300d<\/h4>\n<p><span class=\"token comment\">\/\/ \u9884\u70ed\u903b\u8f91\u793a\u4f8b&#xff08;\u6838\u5fc3\u4ee3\u7801&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">WarmupService<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;PostConstruct<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">preheat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ 1. \u52a0\u8f7d\u7f13\u5b58<\/span><br \/>\n        cacheService<span class=\"token punctuation\">.<\/span><span class=\"token function\">preloadData<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 2. \u9884\u7f16\u8bd1JSP\u6a21\u677f<\/span><br \/>\n        templateEngine<span class=\"token punctuation\">.<\/span><span class=\"token function\">precompileTemplates<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 3. \u9884\u70ed\u6570\u636e\u5e93\u8fde\u63a5\u6c60<\/span><br \/>\n        dataSource<span class=\"token punctuation\">.<\/span><span class=\"token function\">getConnection<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>PostConstruct&#xff1a;\u5728Spring\u5bb9\u5668\u521d\u59cb\u5316\u540e\u7acb\u5373\u6267\u884c\u3002<\/li>\n<li>\u8d44\u6e90\u9884\u70ed&#xff1a;\u51cf\u5c11\u51b7\u542f\u52a8\u65f6\u7684\u9996\u6b21\u54cd\u5e94\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u56db\u3001JVM\u53c2\u6570\u8c03\u4f18&#xff1a;\u8ba9Java\u5bb9\u5668\u201c\u547c\u5438\u81ea\u5982\u201d<\/h3>\n<h4>4.1 \u5bb9\u5668\u5316\u73af\u5883\u7684JVM\u4f18\u5316<\/h4>\n<p><span class=\"token comment\">\/\/ JVM\u53c2\u6570\u914d\u7f6e\u793a\u4f8b&#xff08;Dockerfile&#xff09;<\/span><br \/>\nFROM eclipse<span class=\"token operator\">&#8211;<\/span>temurin<span class=\"token operator\">:<\/span><span class=\"token number\">17<\/span><span class=\"token operator\">&#8211;<\/span>jdk<span class=\"token operator\">&#8211;<\/span>alpine<br \/>\n<span class=\"token class-name\">ARG<\/span> JAR_FILE<span class=\"token operator\">&#061;<\/span>target<span class=\"token comment\">\/*.jar<br \/>\nCOPY ${JAR_FILE} app.jar<br \/>\nENTRYPOINT [&#034;java&#034;,<br \/>\n    &#034;-XX:&#043;UseContainerSupport&#034;, \/\/ \u542f\u7528\u5bb9\u5668\u611f\u77e5<br \/>\n    &#034;-XX:MaxRAMPercentage&#061;80.0&#034;, \/\/ \u6700\u5927\u4f7f\u752880%\u5bb9\u5668\u5185\u5b58<br \/>\n    &#034;-XX:InitialRAMPercentage&#061;50.0&#034;, \/\/ \u521d\u59cb\u5185\u5b5850%<br \/>\n    &#034;-XX:&#043;UseG1GC&#034;, \/\/ G1\u5783\u573e\u56de\u6536\u5668<br \/>\n    &#034;-jar&#034;, &#034;app.jar&#034;<br \/>\n]<br \/>\n<\/span> <\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>UseContainerSupport&#xff1a;\u8ba9JVM\u611f\u77e5\u5bb9\u5668\u5185\u5b58\u9650\u5236\u3002<\/li>\n<li>G1GC&#xff1a;\u9002\u5408\u9ad8\u541e\u5410\u91cf\u573a\u666f&#xff0c;\u51cf\u5c11GC\u505c\u987f\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>4.2 \u907f\u514dOOM&#xff1a;\u52a8\u6001\u5806\u5185\u5b58\u5206\u914d<\/h4>\n<p><span class=\"token comment\">\/\/ \u52a8\u6001\u5806\u5185\u5b58\u8ba1\u7b97\u516c\u5f0f&#xff08;\u6838\u5fc3\u903b\u8f91&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">HeapCalculator<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">long<\/span> maxHeap <span class=\"token operator\">&#061;<\/span><br \/>\n            <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Runtime<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getRuntime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">maxMemory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">0.8<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u4fdd\u755920%\u7ed9JVM<\/span><br \/>\n            <span class=\"token operator\">&#8211;<\/span> <span class=\"token function\">calculateOffHeapUsage<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6263\u9664\u975e\u5806\u5185\u5b58\u4f7f\u7528<\/span><\/p>\n<p>        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">setProperty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;java\u5806.size&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">valueOf<\/span><span class=\"token punctuation\">(<\/span>maxHeap<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>Off-Heap\u8ba1\u7b97&#xff1a;\u5305\u62ecNIO\u7f13\u51b2\u533a\u3001\u7ebf\u7a0b\u6808\u7b49\u975e\u5806\u5185\u5b58\u3002<\/li>\n<li>\u5b89\u5168\u8fb9\u754c&#xff1a;\u9632\u6b62\u5185\u5b58\u6ea2\u51fa&#xff08;OOM&#xff09;\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e94\u3001\u5b9e\u6218\u6848\u4f8b&#xff1a;\u7535\u5546\u4fc3\u9500\u7684\u300c\u6d41\u91cf\u6d77\u5578\u300d\u5e94\u5bf9\u65b9\u6848<\/h3>\n<h4>5.1 \u573a\u666f&#xff1a;\u53cc11\u6d41\u91cf\u7a81\u589e10\u500d<\/h4>\n<p><span class=\"token comment\"># Kubernetes HPA\u914d\u7f6e&#xff08;\u6838\u5fc3\u4ee3\u7801&#xff09;<\/span><br \/>\n<span class=\"token key atrule\">apiVersion<\/span><span class=\"token punctuation\">:<\/span> autoscaling\/v2beta2<br \/>\n<span class=\"token key atrule\">kind<\/span><span class=\"token punctuation\">:<\/span> HorizontalPodAutoscaler<br \/>\n<span class=\"token key atrule\">metadata<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> e<span class=\"token punctuation\">&#8211;<\/span>commerce<span class=\"token punctuation\">&#8211;<\/span>hpa<br \/>\n<span class=\"token key atrule\">spec<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token key atrule\">scaleTargetRef<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token key atrule\">apiVersion<\/span><span class=\"token punctuation\">:<\/span> apps\/v1<br \/>\n    <span class=\"token key atrule\">kind<\/span><span class=\"token punctuation\">:<\/span> Deployment<br \/>\n    <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> e<span class=\"token punctuation\">&#8211;<\/span>commerce<span class=\"token punctuation\">&#8211;<\/span>deployment<br \/>\n  <span class=\"token key atrule\">minReplicas<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">5<\/span><br \/>\n  <span class=\"token key atrule\">maxReplicas<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">50<\/span><br \/>\n  <span class=\"token key atrule\">metrics<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">type<\/span><span class=\"token punctuation\">:<\/span> Resource<br \/>\n    <span class=\"token key atrule\">resource<\/span><span class=\"token punctuation\">:<\/span><br \/>\n      <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> memory<br \/>\n      <span class=\"token key atrule\">target<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">type<\/span><span class=\"token punctuation\">:<\/span> Utilization<br \/>\n        <span class=\"token key atrule\">averageUtilization<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">70<\/span><br \/>\n  <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">type<\/span><span class=\"token punctuation\">:<\/span> Pods<br \/>\n    <span class=\"token key atrule\">pods<\/span><span class=\"token punctuation\">:<\/span><br \/>\n      <span class=\"token key atrule\">metricName<\/span><span class=\"token punctuation\">:<\/span> http_requests_per_second<br \/>\n      <span class=\"token key atrule\">target<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">type<\/span><span class=\"token punctuation\">:<\/span> AverageValue<br \/>\n        <span class=\"token key atrule\">averageValue<\/span><span class=\"token punctuation\">:<\/span> 1000m <span class=\"token comment\"># \u6bcf\u79d2\u8d85\u8fc71000\u8bf7\u6c42\u89e6\u53d1\u6269\u5bb9<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\u591a\u6307\u6807\u53e0\u52a0&#xff1a;\u5185\u5b58&#043;\u8bf7\u6c42\u91cf\u53cc\u91cd\u89e6\u53d1\u3002<\/li>\n<li>\u5f39\u6027\u4e0a\u9650&#xff1a;maxReplicas&#061;50\u5e94\u5bf9\u7a81\u53d1\u6d41\u91cf\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>5.2 \u9884\u70ed\u4e0eJVM\u8c03\u4f18\u5b9e\u6218<\/h4>\n<p><span class=\"token comment\">\/\/ \u4fc3\u9500\u524d\u9884\u70ed\u4ee3\u7801&#xff08;\u6838\u5fc3\u903b\u8f91&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">PromotionPreheater<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">preheat<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ 1. \u9884\u70ed\u5546\u54c1\u7f13\u5b58<\/span><br \/>\n        productCache<span class=\"token punctuation\">.<\/span><span class=\"token function\">preloadAll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 2. \u9884\u70ed\u63a8\u8350\u7b97\u6cd5<\/span><br \/>\n        recommendationEngine<span class=\"token punctuation\">.<\/span><span class=\"token function\">warmUp<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 3. \u9884\u70ed\u6570\u636e\u5e93\u8fde\u63a5\u6c60<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            dataSource<span class=\"token punctuation\">.<\/span><span class=\"token function\">getConnection<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\u5168\u91cf\u9884\u70ed&#xff1a;\u786e\u4fdd\u4fc3\u9500\u5f00\u59cb\u65f6\u65e0\u51b7\u542f\u52a8\u5ef6\u8fdf\u3002<\/li>\n<li>\u8fde\u63a5\u6c60\u538b\u529b\u6d4b\u8bd5&#xff1a;\u6a21\u62df\u9ad8\u5e76\u53d1\u8fde\u63a5\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u516d\u3001\u6027\u80fd\u8c03\u4f18&#xff1a;\u8ba9\u81ea\u52a8\u6269\u7f29\u5bb9\u201c\u5feb\u5982\u95ea\u7535\u201d<\/h3>\n<h4>6.1 \u51b7\u542f\u52a8\u4f18\u5316&#xff1a;\u51cf\u5c11\u9996\u6b21\u54cd\u5e94\u5ef6\u8fdf<\/h4>\n<p><span class=\"token comment\">\/\/ \u4e91\u539f\u751f\u955c\u50cf\u4f18\u5316&#xff08;Dockerfile&#xff09;<\/span><br \/>\nFROM eclipse<span class=\"token operator\">&#8211;<\/span>temurin<span class=\"token operator\">:<\/span><span class=\"token number\">17<\/span><span class=\"token operator\">&#8211;<\/span>jdk<span class=\"token operator\">&#8211;<\/span>alpine<br \/>\n<span class=\"token class-name\">ARG<\/span> JAR_FILE<span class=\"token operator\">&#061;<\/span>target<span class=\"token comment\">\/*.jar<br \/>\nCOPY ${JAR_FILE} app.jar<br \/>\nRUN java -Xmx512m -Xms512m -jar app.jar &#8211;initialize # \u9884\u521d\u59cb\u5316<br \/>\nENTRYPOINT [&#034;java&#034;, &#034;-jar&#034;, &#034;app.jar&#034;]<br \/>\n<\/span> <\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\u9884\u521d\u59cb\u5316&#xff1a;\u6784\u5efa\u65f6\u9884\u52a0\u8f7d\u90e8\u5206\u8d44\u6e90\u3002<\/li>\n<li>\u8f7b\u91cf\u7ea7\u955c\u50cf&#xff1a;Alpine Linux\u51cf\u5c11\u955c\u50cf\u4f53\u79ef\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>6.2 \u5782\u76f4\u6269\u7f29\u5bb9&#xff1a;VPA\u7684\u201c\u52a8\u6001\u8eab\u6750\u7ba1\u7406\u201d<\/h4>\n<p><span class=\"token comment\"># Kubernetes VPA\u914d\u7f6e&#xff08;\u6838\u5fc3\u4ee3\u7801&#xff09;<\/span><br \/>\n<span class=\"token key atrule\">apiVersion<\/span><span class=\"token punctuation\">:<\/span> autoscaling.k8s.io\/v1<br \/>\n<span class=\"token key atrule\">kind<\/span><span class=\"token punctuation\">:<\/span> VerticalPodAutoscaler<br \/>\n<span class=\"token key atrule\">metadata<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> java<span class=\"token punctuation\">&#8211;<\/span>app<span class=\"token punctuation\">&#8211;<\/span>vpa<br \/>\n<span class=\"token key atrule\">spec<\/span><span class=\"token punctuation\">:<\/span><br \/>\n  <span class=\"token key atrule\">targetRef<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token key atrule\">apiVersion<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;apps\/v1&#034;<\/span><br \/>\n    <span class=\"token key atrule\">kind<\/span><span class=\"token punctuation\">:<\/span>       <span class=\"token string\">&#034;Deployment&#034;<\/span><br \/>\n    <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span>       <span class=\"token string\">&#034;java-app-deployment&#034;<\/span><br \/>\n  <span class=\"token key atrule\">updatePolicy<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token key atrule\">updateMode<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;Auto&#034;<\/span><br \/>\n  <span class=\"token key atrule\">resourcePolicy<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token key atrule\">containerPolicies<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">containerName<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;java-app&#034;<\/span><br \/>\n      <span class=\"token key atrule\">minResource<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">cpu<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;500m&#034;<\/span><br \/>\n        <span class=\"token key atrule\">memory<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;512Mi&#034;<\/span><br \/>\n      <span class=\"token key atrule\">maxResource<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">cpu<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;2000m&#034;<\/span><br \/>\n        <span class=\"token key atrule\">memory<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;4Gi&#034;<\/span><br \/>\n      <span class=\"token key atrule\">controlledResources<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;cpu&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;memory&#034;<\/span><span class=\"token punctuation\">]<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\u81ea\u52a8\u8c03\u6574&#xff1a;\u6839\u636e\u5b9e\u9645\u8d44\u6e90\u4f7f\u7528\u52a8\u6001\u8c03\u6574CPU\/\u5185\u5b58\u3002<\/li>\n<li>\u8d44\u6e90\u8fb9\u754c&#xff1a;\u9632\u6b62\u8fc7\u5ea6\u6d88\u8017\u96c6\u7fa4\u8d44\u6e90\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e03\u3001\u672a\u6765\u8d8b\u52bf&#xff1a;AI\u9a71\u52a8\u7684\u81ea\u52a8\u6269\u7f29\u5bb9<\/h3>\n<h4>7.1 \u673a\u5668\u5b66\u4e60\u9884\u6d4b\u6d41\u91cf<\/h4>\n<p><span class=\"token comment\">\/\/ \u6d41\u91cf\u9884\u6d4b\u6a21\u578b&#xff08;\u6838\u5fc3\u903b\u8f91&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TrafficPredictor<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">MLModel<\/span> model<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u9884\u8bad\u7ec3\u7684LSTM\u6a21\u578b<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">predictReplicas<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> futureTime<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">double<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> predictedTraffic <span class=\"token operator\">&#061;<\/span> model<span class=\"token punctuation\">.<\/span><span class=\"token function\">predict<\/span><span class=\"token punctuation\">(<\/span>futureTime<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">(<\/span>predictedTraffic <span class=\"token operator\">*<\/span> <span class=\"token number\">1.2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u9884\u755920%\u5197\u4f59<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>LSTM\u6a21\u578b&#xff1a;\u5904\u7406\u65f6\u95f4\u5e8f\u5217\u6570\u636e&#xff0c;\u9884\u6d4b\u672a\u6765\u6d41\u91cf\u3002<\/li>\n<li>\u5197\u4f59\u7cfb\u6570&#xff1a;\u5e94\u5bf9\u9884\u6d4b\u8bef\u5dee\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>7.2 \u81ea\u6108\u7cfb\u7edf&#xff1a;\u81ea\u52a8\u4fee\u590d\u201c\u75c5\u6001\u5b9e\u4f8b\u201d<\/h4>\n<p><span class=\"token comment\">\/\/ \u81ea\u6108\u903b\u8f91\u793a\u4f8b&#xff08;\u6838\u5fc3\u4ee3\u7801&#xff09;<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AutoHealer<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">KubernetesClient<\/span> client<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">healUnhealthyPods<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Pod<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> unhealthyPods <span class=\"token operator\">&#061;<\/span> client<span class=\"token punctuation\">.<\/span><span class=\"token function\">pods<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">list<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">getItems<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">stream<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">filter<\/span><span class=\"token punctuation\">(<\/span>p <span class=\"token operator\">-&gt;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getStatus<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getPhase<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">equals<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Pending&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">collect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Collectors<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toList<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Pod<\/span> pod <span class=\"token operator\">:<\/span> unhealthyPods<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            client<span class=\"token punctuation\">.<\/span><span class=\"token function\">pods<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">withName<\/span><span class=\"token punctuation\">(<\/span>pod<span class=\"token punctuation\">.<\/span><span class=\"token function\">getMetadata<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">delete<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            log<span class=\"token punctuation\">.<\/span><span class=\"token function\">info<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5df2\u5220\u9664\u5f02\u5e38Pod&#xff1a;{}&#034;<\/span><span class=\"token punctuation\">,<\/span> pod<span class=\"token punctuation\">.<\/span><span class=\"token function\">getMetadata<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6ce8\u91ca\u8bf4\u660e&#xff1a;<\/p>\n<ul>\n<li>\u5065\u5eb7\u68c0\u67e5&#xff1a;\u57fa\u4e8ePod\u72b6\u6001\u81ea\u52a8\u6e05\u7406\u5f02\u5e38\u5b9e\u4f8b\u3002<\/li>\n<li>\u6eda\u52a8\u91cd\u542f&#xff1a;\u786e\u4fdd\u670d\u52a1\u4e0d\u4e2d\u65ad\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e5d\u3001 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