{"id":1418,"date":"2023-02-27T17:02:39","date_gmt":"2023-02-27T09:02:39","guid":{"rendered":"https:\/\/www.myway5.com\/?p=1418"},"modified":"2023-07-05T09:55:36","modified_gmt":"2023-07-05T01:55:36","slug":"kubelet-pleg-implementation","status":"publish","type":"post","link":"https:\/\/www.myway5.com\/index.php\/2023\/02\/27\/kubelet-pleg-implementation\/","title":{"rendered":"kubelet PLEG \u7684\u5b9e\u73b0\u4e0e\u4f18\u5316"},"content":{"rendered":"<h2>\u6982\u8ff0<\/h2>\n<p><strong>PLEG<\/strong> \u5168\u79f0\u662f <strong>Pod Lifecycle Event Generator<\/strong>\uff0c\u7528\u6765\u4e3a kubelet \u751f\u6210 container runtime \u7684 pod \u751f\u547d\u5468\u671f\u4e8b\u4ef6\uff0c\u8fd9\u6837 kubelet \u5c31\u53ef\u4ee5\u6839\u636e pod \u7684 spec \u548c status \u5bf9\u6bd4\uff0c\u6765\u6267\u884c\u5bf9\u5e94\u7684\u63a7\u5236\u903b\u8f91\u3002<\/p>\n<p>\u5728 1.1 \u53ca\u4e4b\u524d\u7684 kubelet \u4e2d\u662f\u6ca1\u6709 PLEG \u7684\u5b9e\u73b0\u7684\u3002kubelet \u4f1a\u4e3a\u6bcf\u4e2a pod \u5355\u72ec\u542f\u52a8\u4e00\u4e2a worker\uff0c\u8fd9\u4e2a worker \u8d1f\u8d23\u5411 container runtime  \u67e5\u8be2\u8be5 pod \u5bf9\u5e94\u7684 sandbox \u548c container \u7684\u72b6\u6001\uff0c\u5e76\u8fdb\u884c\u72b6\u6001\u540c\u6b65\u903b\u8f91\u7684\u6267\u884c\u3002\u8fd9\u79cd one worker per pod \u7684 polling \u6a21\u578b\u7ed9 kubelet \u5e26\u6765\u4e86\u8f83\u5927\u7684\u6027\u80fd\u635f\u8017\u3002\u5373\u4f7f\u8fd9\u4e2a pod \u6ca1\u6709\u4efb\u4f55\u7684\u72b6\u6001\u53d8\u5316\uff0c\u4e5f\u8981\u4e0d\u505c\u7684\u5bf9 container runtime  \u8fdb\u884c\u4e3b\u52a8\u67e5\u8be2\u3002<\/p>\n<p>\u56e0\u6b64\u5728 1.2 \u4e2d\uff0ckubelet \u5f15\u5165\u4e86 PLEG\uff0c\u5c06\u6240\u6709 container runtime  \u4e0a sandbox \u548c container \u7684\u72b6\u6001\u53d8\u5316\u4e8b\u4ef6\u7edf\u4e00\u5230 PLEG \u8fd9\u4e2a\u5355\u72ec\u7684\u7ec4\u4ef6\u4e2d\uff0c\u5b9e\u73b0\u4e86 one worker all pods\u3002\u8fd9\u79cd\u5b9e\u73b0\u76f8\u6bd4\u4e8e one worker per pod \u5df2\u7ecf\u5e26\u6765\u4e86\u8f83\u5927\u7684\u6027\u80fd\u63d0\u5347\uff0c\u8be6\u7ec6\u5b9e\u73b0\u4f1a\u5728\u540e\u6587\u8fdb\u884c\u4ecb\u7ecd\u3002\u4f46\u662f\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u4ecd\u7136\u9700\u8981\u6bcf\u79d2\u4e00\u6b21\u7684\u4e3b\u52a8\u5411 container runtime \u67e5\u8be2\uff0c\u5728 node \u8d1f\u8f7d\u5f88\u9ad8\u7684\u60c5\u51b5\u4e0b\uff0c\u4f9d\u7136\u4f1a\u6709\u4e00\u5b9a\u7684\u6027\u80fd\u95ee\u9898\uff0c\u6bd4\u8f83\u5e38\u89c1\u7684\u60c5\u51b5\u662f\u5bfc\u81f4 node not ready\uff0c\u9519\u8bef\u539f\u56e0\u662f <code>PLEG is not healthy<\/code>\u3002<\/p>\n<p>\u5728 1.26 \u4e2d\uff0ckubelet \u5f15\u5165\u4e86 Evented PLEG\uff0c\u4e3a\u4e86\u548c\u4e4b\u524d\u7684 PLEG \u5b9e\u73b0\u533a\u522b\uff0c\u4e4b\u524d\u7684 PLEG \u79f0\u4e3a Generic PLEG\u3002\u5f53\u7136\uff0cEvented PLEG \u5e76\u4e0d\u662f\u4e3a\u4e86\u53d6\u4ee3 Generic PLEG\uff0c\u800c\u662f\u548c Generic PLEG \u914d\u5408\uff0c\u964d\u4f4e Generic PLEG \u7684 polling \u9891\u7387\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u7684\u540c\u65f6\uff0c\u4e5f\u80fd\u4fdd\u8bc1\u5b9e\u65f6\u6027\u3002<\/p>\n<h2>Generic PLEG<\/h2>\n<p>Generic PLEG \u5b9a\u65f6(\u9ed8\u8ba41s)\u5411 runtime \u8fdb\u884c\u67e5\u8be2\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u79f0\u4e3a relist\uff0c\u8fd9\u91cc\u4f1a\u8c03\u7528 cri \u7684 <code>ListPodSandbox<\/code> \u548c <code>ListContainers<\/code>\u63a5\u53e3\u3002runtime \u8fd4\u56de\u6240\u6709\u7684\u6570\u636e\u4e4b\u540e\uff0cPLEG \u4f1a\u6839\u636e sandbox \u548c container \u4e0a\u7684\u6570\u636e\uff0c\u5bf9\u5e94\u7684 Pod \u4e0a\uff0c\u5e76\u66f4\u65b0\u5230\u7f13\u5b58\u4e2d\u3002\u540c\u65f6\uff0c\u7ec4\u88c5\u6210\u4e8b\u4ef6\u5411 PLEG Channel \u53d1\u9001\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2023\/02\/Snipaste_2023-02-27_16-10-20.png\" alt=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2023\/02\/Snipaste_2023-02-27_16-10-20.png\" \/><\/p>\n<p>kubelet \u4f1a\u5728 pod sync loop \u4e2d\u76d1\u542c PLEG Channel\uff0c\u4ece\u800c\u9488\u5bf9\u72b6\u6001\u53d8\u5316\u6267\u884c\u76f8\u5e94\u7684\u903b\u8f91\uff0c\u6765\u5c3d\u91cf\u4fdd\u8bc1 pod spec \u548c status \u7684\u4e00\u81f4\u3002<\/p>\n<h2>Evented PLEG<\/h2>\n<p>\u5f15\u5165 Evented PLEG \u540e\uff0c\u5bf9 Generic PLEG \u505a\u4e86\u4e9b\u8bb8\u8c03\u6574\uff0c\u4e3b\u8981\u662f relist \u7684\u5468\u671f\u548c\u9608\u503c\uff0c\u4ee5\u53ca\u5bf9\u7f13\u5b58\u7684\u66f4\u65b0\u7b56\u7565\u3002<\/p>\n<ul>\n<li>relist \u7684\u540c\u6b65\u5468\u671f\u7531 1s \u589e\u52a0\u5230 300s\u3002\u540c\u6b65\u9608\u503c\u4ece 3min \u589e\u52a0\u5230 10min\u3002<\/li>\n<li>\u7f13\u5b58\u66f4\u65b0\u65f6\uff0cupdateTime \u4e0d\u518d\u662f\u53d6\u672c\u5730\u7684\u65f6\u95f4\uff0c\u800c\u662f runtime \u8fd4\u56de\u7684\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p>\u9664\u6b64\u4e4b\u5916\uff0cGeneric PLEG \u4f1a\u548c\u4e4b\u524d\u4e00\u6837\u8fd0\u884c\uff0c\u8fd9\u6837\u4e5f\u4fdd\u8bc1\u4e86\u53ca\u65f6 Evented PLEG \u4e22\u5931\u4e86\u4e00\u4e9b \u72b6\u6001\u53d8\u66f4\u7684 event\uff0c\u4e5f\u53ef\u4ee5\u7531 Generic PLEG \u515c\u5e95\u3002<\/p>\n<p>Evented PLEG \u4f1a\u8c03\u7528 runtime \u7684 <code>GetContainerEvents<\/code> \u6765\u76d1\u542c runtime \u4e2d\u7684\u4e8b\u4ef6\uff0c\u7136\u540e\u751f\u6210 pod \u7684 event\uff0c\u5e76\u53d1\u9001\u5230 PLEG Channel \u4e2d\u4f9b kubelet pod sync loop \u6d88\u8d39\u3002<\/p>\n<p>\u5982\u679c Evented \u4e0d\u80fd\u6309\u7167\u9884\u671f\u5de5\u4f5c\uff08\u6bd4\u5982 runtime \u4e0d\u652f\u6301 GetContainerEvents\uff09\uff0c\u8fd8\u4f1a\u964d\u7ea7\u5230 Generic PLEG\u3002\u964d\u7ea7\u903b\u8f91\u662f\uff1a<\/p>\n<ul>\n<li>\u505c\u6b62\u81ea\u5df1\u3002<\/li>\n<li>\u505c\u6b62\u5df2\u6709\u7684 Generic PLEG\u3002<\/li>\n<li>\u66f4\u65b0 Generic PLEG \u7684 relist \u5468\u671f\u548c\u9608\u503c\u4e3a 1s, 3min\u3002<\/li>\n<li>\u542f\u52a8\u65b0\u7684 Generic PLEG\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2023\/02\/Snipaste_2023-02-27_16-58-56.png\" alt=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2023\/02\/Snipaste_2023-02-27_16-58-56.png\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2023\/02\/Snipaste_2023-02-27_16-10-20-1.png\" alt=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2023\/02\/Snipaste_2023-02-27_16-10-20-1.png\" \/><\/p>\n<p>\u56e0\u4e3a Evented PLEG \u548c Generic PLEG \u4f1a\u540c\u65f6\u66f4\u65b0\u7f13\u5b58\uff0c\u6240\u4ee5\u5728\u66f4\u65b0\u65f6\u8fd8\u4f1a\u5bf9\u6bd4\u5f53\u524d\u503c\u548c\u7f13\u5b58\u503c\u7684\u65f6\u95f4\u6233\uff0c\u4fdd\u8bc1\u5f53\u524d\u503c\u662f\u66f4\u65b0\u7684\u72b6\u6001\uff0c\u624d\u4f1a\u66f4\u65b0\u5230\u7f13\u5b58\u4e2d\u3002<\/p>\n<h2>\u53c2\u8003\u6587\u7ae0<\/h2>\n<ul>\n<li><a class=\"wp-editor-md-post-content-link\" href=\"https:\/\/github.com\/kubernetes\/community\/blob\/4026287dc3a2d16762353b62ca2fe4b80682960a\/contributors\/design-proposals\/node\/pod-lifecycle-event-generator.md#leverage-upstream-container-events\">Kubelet: Pod Lifecycle Event Generator (PLEG)<\/a><\/li>\n<li><a class=\"wp-editor-md-post-content-link\" href=\"https:\/\/github.com\/kubernetes\/enhancements\/blob\/master\/keps\/sig-node\/3386-kubelet-evented-pleg\/README.md\">KEP-3386: Kubelet Evented PLEG for Better Performance<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8ff0 PLEG \u5168\u79f0\u662f Pod Lifecycle Event Generator\uff0c\u7528\u6765\u4e3a kubelet \u751f &hellip; <a href=\"https:\/\/www.myway5.com\/index.php\/2023\/02\/27\/kubelet-pleg-implementation\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">kubelet PLEG \u7684\u5b9e\u73b0\u4e0e\u4f18\u5316<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[89],"tags":[126],"class_list":["post-1418","post","type-post","status-publish","format-standard","hentry","category-k8s","tag-pleg"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>kubelet PLEG \u7684\u5b9e\u73b0\u4e0e\u4f18\u5316 - \u4e00\u53ea\u5b89\u9759\u7684\u732b<\/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.myway5.com\/index.php\/2023\/02\/27\/kubelet-pleg-implementation\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"kubelet PLEG 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content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"jiangpengfei\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.myway5.com\/index.php\/2023\/02\/27\/kubelet-pleg-implementation\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.myway5.com\/index.php\/2023\/02\/27\/kubelet-pleg-implementation\/\"},\"author\":{\"name\":\"jiangpengfei\",\"@id\":\"https:\/\/www.myway5.com\/#\/schema\/person\/b19267e8b106343431e163ec96950685\"},\"headline\":\"kubelet PLEG 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