{"id":36192,"date":"2023-02-08T03:32:26","date_gmt":"2023-07-23T10:26:05","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/kubernetes-%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6\/"},"modified":"2024-04-29T13:36:50","modified_gmt":"2024-04-29T05:36:50","slug":"kubernetes-%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/kubernetes-%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6\/","title":{"rendered":"Kubernetes \u7684\u5783\u573e\u56de\u6536"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u6982\u8ff0Kubernetes\u7684\u5783\u573e\u56de\u6536\u673a\u5236\u3002<\/p>\n

\u5783\u573e\u6536\u96c6\u662f\u4ec0\u4e48\uff1f<\/h1>\n

\u4e00\u822c\u7684\u7684\u5783\u573e\u6536\u96c6\uff08GC\uff09\u662f\u6307\u7a0b\u5e8f\u81ea\u52a8\u91ca\u653e\u52a8\u6001\u5206\u914d\u7684\u4e0d\u518d\u9700\u8981\u7684\u5185\u5b58\u7a7a\u95f4\u7684\u529f\u80fd\uff08\u6765\u6e90\u4e8e\u7ef4\u57fa\u767e\u79d1\uff09\uff0c\u800c\u5728Kubernetes\u4e2d\u6240\u79f0\u7684GC\u5305\u62ec\u4ee5\u4e0b\u5185\u5bb9\u3002<\/p>\n

\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e GC<\/p>\n

API Server (etcd) \u306b\u4fdd\u6301\u3055\u308c\u3066\u3044\u308b Kubernetes \u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3046\u3061\u3001\u304b\u3064\u3066\u30aa\u30fc\u30ca\u30fc\u304c\u3044\u305f\u304c\u3001\u73fe\u6642\u70b9\u3067\u3082\u306f\u3084\u30aa\u30fc\u30ca\u30fc\u304c\u3044\u306a\u3044\u3088\u3046\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u524a\u9664\u3092\u884c\u3046 GC<\/p>\n

Pod \u306e GC<\/p>\n

\u5b58\u5728\u3057\u306a\u3044 Node \u306b\u914d\u7f6e\u3055\u308c\u3066\u3044\u308b Pod \u3068\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u3055\u308c\u305a\u306b Terminating \u306b\u306a\u3063\u305f Pod \u3092\u524a\u9664\u3059\u308b GC<\/p>\n

Image GC<\/p>\n

Node \u306b\u4fdd\u6301\u3055\u308c\u3066\u3044\u308b\u30b3\u30f3\u30c6\u30ca\u30a4\u30e1\u30fc\u30b8\u306e\u3046\u3061\u3001\u304b\u3064\u3066\u8d77\u52d5\u3057\u305f\u304c\u73fe\u6642\u70b9\u3067\u306f\u3082\u306f\u3084\u5229\u7528\u3055\u308c\u306a\u304f\u306a\u3063\u305f\u30b3\u30f3\u30c6\u30ca\u30a4\u30e1\u30fc\u30b8\u306e\u524a\u9664\u3092\u884c\u3046GC<\/p>\n

\u8fd9\u6b21\u6211\u4eec\u5c06\u8be6\u7ec6\u7814\u7a76\u8fd9\u4e9b\u5bf9\u8c61\u4e2d\u7684\u5783\u573e\u56de\u6536\u3002\u5176\u4ed6\u7684\u5185\u5bb9\u6211\u4f1a\u5728\u6709\u5174\u8da3\u7684\u65f6\u5019\u5199\u8c03\u67e5\u6587\u7ae0\u3002<\/p>\n

\u5bf9\u8c61\u7684\u5783\u573e\u56de\u6536<\/h1>\n

\u5728Kubernetes\u4e2d\uff0c\u5f53\u5220\u9664\u5bf9\u8c61\u65f6\uff0c\u6709\u65f6\u9700\u8981\u5220\u9664\u4f5c\u4e3a\u5176\u7236\u7ea7\u7684\u5b50\u5bf9\u8c61\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5b50\u5bf9\u8c61\u7684\u5220\u9664\u662f\u901a\u8fc7\u5783\u573e\u56de\u6536\uff08GC\uff09\u6765\u8fdb\u884c\u7684\u3002\uff08\u4f8b\u5982\uff0c\u5728\u4f7f\u7528kubectl\u5220\u9664\u90e8\u7f72\u65f6\uff0c\u9884\u8ba1\u4f1a\u5220\u9664\u526f\u672c\u96c6\u548cPod\uff0c\u8fd9\u662f\u4e00\u79cd\u60c5\u51b5\uff09Kubernetes 1.8\u4e4b\u524d\uff0ckubectl\u548c\u63a7\u5236\u5668\u76f4\u63a5\u8fdb\u884c\u5b50\u5bf9\u8c61\u7684\u5220\u9664\uff0c\u4f46\u73b0\u5728\u5df2\u7ecf\u901a\u8fc7GC\u8fdb\u884c\u5220\u9664\u3002\u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u8003KEP\u3002<\/p>\n

\u53e6\u5916\uff0c\u7531\u4e8eKubernetes\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u5b83\u65e0\u6cd5\u539f\u5b50\u66f4\u65b0\u5404\u79cd\u5904\u7406\uff0c\u56e0\u6b64\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u5982\u679c\u53d1\u751f\u5931\u8d25\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5df2\u7ecf\u4e0d\u5b58\u5728\u7684\u5b64\u513f\u5bf9\u8c61\u51fa\u73b0\u3002\u5bf9\u4e8e\u8fd9\u4e9b\u5b64\u513f\uff08orphan\uff09\u5bf9\u8c61\uff0c\u7cfb\u7edf\u4f1a\u5b9a\u671f\u8fdb\u884c\u5783\u573e\u56de\u6536\uff08\u5220\u9664\uff09\u3002<\/p>\n

\u73b0\u5728\u8ba9\u6211\u4eec\u6765\u770b\u770bGC\u662f\u5982\u4f55\u8fdb\u884c\u56de\u6536\u7684\uff0c\u4f46\u5728\u6b64\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u6765\u770b\u770bGC\u4f7f\u7528\u7684\u4e00\u4e9b\u9886\u57df\u3002<\/p>\n

\u6240\u6709\u8005\u5f15\u7528<\/h2>\n

\u5f53\u6267\u884c\u8bf8\u5982 `kubectl get pod -o yaml` \u7684\u547d\u4ee4\u65f6\uff0cmetadata \u4e2d\u53ef\u80fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a ownerReferences \u7684\u5b57\u6bb5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u3002<\/p>\n

apiVersion<\/span>:<\/span> v1<\/span>\r\nkind<\/span>:<\/span> Pod<\/span>\r\nmetadata<\/span>:<\/span>\r\n  ...<\/span>\r\n  ownerReferences<\/span>:<\/span>\r\n  -<\/span> apiVersion<\/span>:<\/span> apps\/v1<\/span>\r\n    controller<\/span>:<\/span> true<\/span>\r\n    blockOwnerDeletion<\/span>:<\/span> true<\/span>\r\n    kind<\/span>:<\/span> ReplicaSet<\/span>\r\n    name<\/span>:<\/span> my-repset<\/span>\r\n    uid<\/span>:<\/span> d9607e19-f88f-11e6-a518-42010a800195<\/span>\r\n  ...<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4e2a ownerReferences \u7528\u4e8eGC\u5224\u65ad\u5bf9\u8c61\u7684\u6240\u6709\u8005\uff0c\u4e3b\u8981\u5728\u63a7\u5236\u5668\u81ea\u52a8\u521b\u5efa\u5bf9\u8c61\u65f6\u81ea\u52a8\u8bbe\u7f6e\u3002<\/p>\n
\u7ec8\u7ed3\u5668<\/h2>\n
Finalizers\u662fCRD\uff08Custom Resource Definition\uff09\u4f7f\u7528\u8005\u975e\u5e38\u719f\u6089\u7684\u529f\u80fd\uff0c\u7b80\u5355\u6765\u8bf4\uff0c\u5b83\u662f\u4e3a\u4e86\u963b\u6b62\u5220\u9664\u64cd\u4f5c\u800c\u6267\u884c\u7684\u9884\u5904\u7406\u529f\u80fd\u3002\u8fd9\u6837\u53ef\u4ee5\u8f7b\u677e\u5730\u5305\u542b\u7531\u8be5\u5bf9\u8c61\u521b\u5efa\u7684\u5b50\u5bf9\u8c61\u7684\u5220\u9664\u4ee5\u53ca\u5bf9Kubernetes\u5916\u90e8\u8d44\u6e90\u7684\u6e05\u7406\u5904\u7406\u3002<\/p>\n
Finalizers\u4fe1\u606f\u4e5f\u4fdd\u5b58\u5728metadata\u7684finalizers\u5b57\u6bb5\u4e2d\uff0c\u5982\u679c\u8be5\u5b57\u6bb5\u6709\u503c\uff0c\u90a3\u4e48\u5bf9\u8c61\u5c06\u4e0d\u4f1a\u88ab\u5220\u9664\u3002\u7ba1\u7406\u8be5\u503c\u9700\u8981\u5355\u72ec\u51c6\u5907\u4e00\u4e2a\u63a7\u5236\u5668\u6765\u7ba1\u7406\uff0c\u6bcf\u4e2aFinalizer\u90fd\u6709\u76f8\u5e94\u7684\u63a7\u5236\u5668\u8d1f\u8d23\u6267\u884c\u6e05\u7406\u5904\u7406\u3002<\/p>\n
\u8be6\u7ec6\u4fe1\u606f\u53ef\u4ee5\u53c2\u8003\u76f8\u5173\u8d44\u6e90\u3002<\/p>\n
\u4e0e GC \u76f8\u5173\u7684 Finalizers \u5305\u62ec\u4ee5\u4e0b\u5185\u5bb9\u3002<\/p>\n
    \n
  • \n
      FinalizerOrphanDependents: “orphan”<\/ul>\n<\/li>\n<\/ul>\n
      propagationPolicy Orphan \u3067\u524a\u9664\u3057\u305f\u3068\u304d\u306b\u8a2d\u5b9a\u3055\u308c\u308b<\/p>\n
      FinalizerDeleteDependents: “foregroundDeletion”<\/p>\n
      propagationPolicy Foreground \u3067\u524a\u9664\u3057\u305f\u3068\u304d\u306b\u8a2d\u5b9a\u3055\u308c\u308b<\/p>\n
      \u5982\u679c\u8bbe\u7f6e\u4e86\u8fd9\u4e9b Finalizers\uff0c\u5c06\u901a\u8fc7\u4ee5\u4e0bGC\u8fdb\u884c\u5220\u9664\uff0c\u5e76\u5728\u5b8c\u6210\u540e\u4ecemetadata.finalizers\u4e2d\u5220\u9664\u3002<\/p>\n
      GC\u7684\u884c\u52a8<\/h2>\n
      \u6839\u636e\u8bfb\u53d6\u7684\u6e90\u4ee3\u7801\uff0c\u4f3c\u4e4e\u6709\u4ee5\u4e0b\u7ec4\u4ef6\uff0c\u5e76\u4e14\u53ef\u4ee5\u7c97\u7565\u5730\u63cf\u8ff0\u5982\u4e0b\u3002<\/p>\n
        \n
      • \n
          Scanner: API\u304c\u73fe\u5728\u63d0\u4f9b\u3057\u3066\u3044\u308b\u30ea\u30bd\u30fc\u30b9\u306e\u4e00\u89a7\u3092\u53d6\u5f97\u3057\u3066\u3001Monitor \u3092\u751f\u6210\u3057(\u2460)\u5404\u30ea\u30bd\u30fc\u30b9\u306e\u5909\u66f4\u3092\u691c\u77e5\u3059\u308b(\u2461)<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              DependencyGraphBuilder<\/ul>\n<\/li>\n<\/ul>\n
              Scanner \u304b\u3089\u63d0\u4f9b\u3055\u308c\u305f\u691c\u77e5\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u5143\u306b DAG(Directed acyclic graph) \u3092\u4f5c\u6210\u3057\u3001Delete \u3084 Orphan \u306b\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3042\u308c\u3070 workqueue \u306b\u5165\u308c\u308b(\u2462)<\/p>\n
              \u3053\u3053\u306e\u30b0\u30e9\u30d5\u306e\u4f5c\u6210\u6642\u306b OwnerReferences \u3092\u5229\u7528\u3057\u3066\u30aa\u30fc\u30ca\u30fc\u3092\u5224\u65ad\u3057\u3066\u3044\u307e\u3059
              \nFinalizers \u306f DELETE API \u306e\u547c\u3073\u51fa\u3057\u305f\u3068\u304d\u306b Option \u306b\u6307\u5b9a\u306b\u3088\u3063\u3066 API Server \u304c\u8a2d\u5b9a\u3057\u3001GC \u306f\u305d\u308c\u3092\u898b\u3066\u5404 worker \u306b\u51e6\u7406\u3092\u6e21\u3057\u5b50\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u51e6\u7406\u3092\u884c\u3044\u307e\u3059<\/p>\n
              Worker<\/p>\n
              DeleteWorker: workqueue \u304b\u3089\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3057\u3066\u4f9d\u5b58\u95a2\u4fc2\u3092\u6574\u7406\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u524a\u9664\u3059\u308b\u2463
              \nOrphanWorker: \u4f9d\u5b58\u95a2\u4fc2\u3092\u6574\u7406\u3057\u3066 Orphan Finalizer \u3092\u524a\u9664\u3059\u308b\u2463<\/p>\n
              \"image.png\"<\/div>\n
              \u6536\u56de\u5bf9\u8c61<\/h2>\n
              \u5bfb\u627e\u53ef\u56de\u6536\u7684\u5bf9\u8c61\u65f6\uff0c\u6211\u5c1d\u8bd5\u627e\u5230\u6587\u4ef6\u7b49\u76f8\u5173\u6587\u6863\uff0c\u4f46\u5177\u4f53\u8bb0\u5f55\u7684\u6765\u6e90\u672a\u80fd\u627e\u5230\uff0c\u56e0\u6b64\u6211\u4ece\u6e90\u4ee3\u7801\u4e2d\u8bfb\u53d6\u4e86\u4fe1\u606f\u3002
              \n\u57fa\u672c\u4e0a\uff0c\u6839\u636e\u6211\u6240\u7406\u89e3\u7684\u8303\u56f4\uff0cGetDeletableResources\u51fd\u6570\u83b7\u53d6\u7684\u8d44\u6e90\u4e2d\u672a\u88ab\u6307\u5b9a\u4e3aIgnore\u7684\u8d44\u6e90\u5c06\u6210\u4e3a\u56de\u6536\u7684\u5bf9\u8c61\u3002<\/p>\n
              \/api \u3068 \/apis \u306e API \u304b\u3089\u53d6\u5f97\u3067\u304d\u308b APIGroup \u306b\u6240\u5c5e\u3059\u308b\u30ea\u30bd\u30fc\u30b9<\/p>\n
              delete, list, watch \u306e verb \u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30ea\u30bd\u30fc\u30b9<\/p>\n
              https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.17.0\/pkg\/controller\/garbagecollector\/garbagecollector.go#L650<\/p>\n
              Innore \u306b\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044<\/p>\n
              https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.17.0\/pkg\/controller\/garbagecollector\/graph_builder.go#L192<\/p>\n
              \u514d\u8d39\u8d60\u54c1<\/h1>\n
              \u52a8\u6001\u5171\u4eab\u901a\u77e5\u8005<\/h2>\n
              \u6211\u8bb0\u5f97\u5f53DynamicSharedInformer\u88ab\u6dfb\u52a0\u65f6\uff0c\u6211\u542c\u8bf4\u662f\u4e3a\u4e86\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u4f46\u5b9e\u9645\u67e5\u770b\u6e90\u4ee3\u7801\uff08https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.17.0\/pkg\/controller\/garbagecollector\/graph_builder.go#L127\uff09\u53d1\u73b0\u5b83\u4f3c\u4e4e\u662f\u901a\u8fc7\u5355\u72ec\u7684Informer\u8fdb\u884c\u76d1\u89c6\u7684\u3002\u6839\u636e\u6211\u521d\u6b65\u7684\u641c\u7d22\u7ed3\u679c\uff0c\u597d\u50cfk\/k\u5e76\u6ca1\u6709\u4f7f\u7528DynamicSharedInformer\uff0c\u6240\u4ee5\u6211\u60f3\u77e5\u9053\u5b83\u662f\u4e0d\u662f\u8fd8\u6ca1\u6709\u5b9e\u73b0\uff0c\u6216\u8005\u6709\u5176\u4ed6\u7684\u539f\u56e0\u3002<\/p>\n
              \u6587\u732e\u5f15\u7528<\/h1>\n
                \n
              • \n
                  https:\/\/github.com\/kubernetes\/community\/blob\/master\/contributors\/design-proposals\/api-machinery\/garbage-collection.md<\/ul>\n<\/li>\n<\/ul>\n
                   <\/p>\n
                    \n
                  • \n
                      https:\/\/github.com\/kubernetes\/community\/blob\/master\/contributors\/design-proposals\/api-machinery\/synchronous-garbage-collection.md<\/ul>\n<\/li>\n<\/ul>\n
                       <\/p>\n
                        \n
                      • \n
                          https:\/\/thenewstack.io\/deletion-garbage-collection-kubernetes-objects\/<\/ul>\n<\/li>\n<\/ul>\n
                           <\/p>\n
                            https:\/\/www.firehydrant.io\/blog\/dynamic-kubernetes-informers\/<\/ul>\n","protected":false},"excerpt":{"rendered":"
                            \u9996\u5148 \u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u6982\u8ff0Kubernetes\u7684\u5783\u573e\u56de\u6536\u673a\u5236\u3002 \u5783\u573e\u6536\u96c6\u662f\u4ec0\u4e48\uff1f \u4e00\u822c\u7684\u7684\u5783\u573e\u6536\u96c6\uff08GC\uff09 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-36192","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nKubernetes \u7684\u5783\u573e\u56de\u6536 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/kubernetes-\u7684\u5783\u573e\u56de\u6536\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kubernetes \u7684\u5783\u573e\u56de\u6536\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u6982\u8ff0Kubernetes\u7684\u5783\u573e\u56de\u6536\u673a\u5236\u3002 \u5783\u573e\u6536\u96c6\u662f\u4ec0\u4e48\uff1f \u4e00\u822c\u7684\u7684\u5783\u573e\u6536\u96c6\uff08GC\uff09 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/kubernetes-\u7684\u5783\u573e\u56de\u6536\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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