{"id":36013,"date":"2023-03-24T21:36:34","date_gmt":"2023-01-13T15:04:53","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/kubernetes-%e7%9a%84%e4%b8%b4%e6%97%b6%e5%ad%98%e5%82%a8%e7%a9%ba%e9%97%b4\/"},"modified":"2024-04-29T20:23:35","modified_gmt":"2024-04-29T12:23:35","slug":"kubernetes-%e7%9a%84%e4%b8%b4%e6%97%b6%e5%ad%98%e5%82%a8%e7%a9%ba%e9%97%b4","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/kubernetes-%e7%9a%84%e4%b8%b4%e6%97%b6%e5%ad%98%e5%82%a8%e7%a9%ba%e9%97%b4\/","title":{"rendered":"Kubernetes \u7684\u4e34\u65f6\u5b58\u50a8\u7a7a\u95f4"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u672c\u6587\u5c06\u603b\u7ed3\u5173\u4e8e\u4f7f\u7528Kubernetes\u7684\u4e34\u65f6\u5b58\u50a8\u7684\u6ce8\u610f\u4e8b\u9879\u7b49\u5185\u5bb9\u3002<\/p>\n<h1>\u4e34\u65f6\u5b58\u50a8\u662f\u4ec0\u4e48\u3002<\/h1>\n<p>\u5728Kubernetes\u4e2d\uff0c\u4f5c\u4e3a\u4e34\u65f6\u5b58\u50a8\u5904\u7406\u7684\u5bf9\u8c61\u5305\u62ec\u4ee5\u4e0b\u4e09\u4e2a\u65b9\u9762\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">emptyDir volume<\/ul>\n<\/li>\n<\/ul>\n<p>Pod \u3067\u30de\u30a6\u30f3\u30c8\u3057\u3066\u5229\u7528\u3059\u308b emptyDir \u5185\u3067\u5229\u7528\u3059\u308b\u30b9\u30c8\u30ec\u30fc\u30b8<\/p>\n<p>log directory<\/p>\n<p>Pod \u3067\u52d5\u4f5c\u3059\u308b\u3059\u3079\u3066\u306e\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u51fa\u529b\u3055\u308c\u308b\u30ed\u30b0<\/p>\n<p>writable layers<\/p>\n<p>Pod \u3067\u52d5\u4f5c\u3057\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30b3\u30f3\u30c6\u30ca\u306e\u30ed\u30fc\u30ab\u30eb\u30c7\u30a3\u30b9\u30af\u306b\u5bfe\u3057\u3066\u306e\u66f8\u304d\u8fbc\u307f\u3057\u305f\u5185\u5bb9<\/p>\n<p>\u8fd9\u4e5f\u9002\u7528\u4e8ePod.spec.resource.requests\/limit\u6307\u5b9a\u7684\u5185\u5bb9\u3002\u8bf7\u6ce8\u610f\uff0c\u4e0d\u5305\u62echostPath\u3001Local Volume\u7b49emptyDir\u4ee5\u5916\u7684Volume\u3002<\/p>\n<h1>\u4e34\u65f6\u5b58\u50a8\u8d44\u6e90\u7684\u8bf7\u6c42\u548c\u9650\u5236<\/h1>\n<p>\u4ecev1.11\u7248\u672c\u5f00\u59cb\uff0c\u53ef\u4ee5\u5728Pod.spec.resource.requests\/limit\u4e2d\u8bbe\u7f6e\u4e34\u65f6\u5b58\u50a8\u3002\u4f7f\u7528\u65b9\u6cd5\u4f3c\u4e4e\u4e0e\u5185\u5b58\u7b49\u76f8\u540c\u3002\u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605https:\/\/kubernetes.io\/docs\/concepts\/configuration\/manage-compute-resources-container\/#requests-and-limits-setting-for-local-ephemeral-storage\u3002<\/p>\n<h2>\u8bbe\u7f6e\u4e86Pod.spec.resource.requests\u4e2d\u7684ephemeral-storage\u7684Pod\u4f1a\u5982\u4f55\u88ab\u8c03\u5ea6\uff1f<\/h2>\n<p>Note: The provided statement appears to be in Japanese. If you are looking for a translation into Chinese, here&#8217;s one possible option:<\/p>\n<p>\u8bbe\u7f6e\u4e86Pod.spec.resource.requests\u4e2d\u7684ephemeral-storage\u7684Pod\u4f1a\u5982\u4f55\u88ab\u8c03\u5ea6\uff1f<\/p>\n<p>\u5982\u679c\u67e5\u770bhttps:\/\/kubernetes.io\/docs\/concepts\/configuration\/manage-compute-resources-container\/#how-pods-with-ephemeral-storage-requests-are-scheduled \uff0c\u4f1a\u53d1\u73b0\u5199\u9053\uff1a<\/p>\n<blockquote><p>\u5f53Pod\u88ab\u521b\u5efa\u65f6\uff0c\u8c03\u5ea6\u5668\u4f1a\u9009\u62e9\u8981\u6267\u884c\u8be5Pod\u7684\u8282\u70b9\u3002<br \/>\n\u6bcf\u4e2a\u8282\u70b9\u90fd\u6709\u5176\u53ef\u4ee5\u63d0\u4f9b\u7ed9Pod\u7684\u672c\u5730\u4e34\u65f6\u5b58\u50a8\u7684\u6700\u5927\u503c\u3002\u8be6\u7ec6\u4fe1\u606f\u8bf7\u53c2\u9605\u8282\u70b9\u53ef\u5206\u914d\u6027\u3002<br \/>\n\u8c03\u5ea6\u5668\u4f1a\u786e\u4fdd\u8981\u8c03\u5ea6\u7684\u6240\u6709\u5bb9\u5668\u7684\u8bf7\u6c42\u5408\u8ba1\u5c11\u4e8e\u8282\u70b9\u8d44\u6e90\u7684\u5bb9\u91cf\u3002<\/p><\/blockquote>\n<p>\u770b\u8d77\u6765 resource.requests.memory \u7b49\u884c\u4e3a\u76f8\u540c\u3002<\/p>\n<h2>\u62e5\u6709\u4e34\u65f6\u5b58\u50a8\u9650\u5236\u7684 Pod \u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/h2>\n<p>\u8bf7\u53c2\u9605 https:\/\/kubernetes.io\/docs\/concepts\/configuration\/manage-compute-resources-container\/#how-pods-with-ephemeral-storage-limits-run\uff0c\u5176\u5185\u5bb9\u5982\u4e0b\u6240\u8ff0\u3002<\/p>\n<blockquote><p>\u5728\u5bb9\u5668\u7ea7\u9694\u79bb\u4e2d\uff0c\u5f53\u5bb9\u5668\u7684\u53ef\u5199\u5c42\u548c\u65e5\u5fd7\u7684\u4f7f\u7528\u91cf\u8d85\u8fc7\u8d44\u6e90\u9650\u5236\u503c\u65f6\uff0cPod \u5c06\u88ab\u9a71\u9010\u3002<br \/>\n\u5728Pod\u7ea7\u9694\u79bb\u4e2d\uff0c\u5f53\u6240\u6709\u5bb9\u5668\u7684\u672c\u5730\u4e34\u65f6\u5b58\u50a8\u4f7f\u7528\u91cf\u548cPod\u7684emptyDir\u5377\u8d85\u8fc7\u9650\u5236\u65f6\uff0cPod \u5c06\u88ab\u9a71\u9010\u3002<\/p><\/blockquote>\n<h3>\u76d1\u89c6ephemeral-storage\u7684\u4f7f\u7528\u60c5\u51b5<\/h3>\n<p>\u4e3a\u4e86\u6267\u884c\u4e0a\u8ff0\u7684 evict \u64cd\u4f5c\uff0c\u9700\u8981\u76d1\u89c6\u6bcf\u4e2a\u5b58\u50a8\u7684\u4f7f\u7528\u60c5\u51b5\u3002\u5728\u4ee5\u4e0b\u94fe\u63a5\u4e2d\u63cf\u8ff0\u4e86\u5982\u4f55\u8fdb\u884c\u6b64\u9879\u76d1\u89c6\uff1ahttps:\/\/kubernetes.io\/docs\/concepts\/configuration\/manage-compute-resources-container\/#monitoring-ephemeral-storage-consumption<\/p>\n<blockquote><p>\u672c\u5730\u4e34\u65f6\u5b58\u50a8\u5728\u4f7f\u7528\u65f6\u5c06\u88abKubelet\u6301\u7eed\u76d1\u89c6\u3002\u76d1\u89c6\u5c06\u5b9a\u671f\u626b\u63cf\u6bcf\u4e2aemptyDir\u5377\u3001\u65e5\u5fd7\u76ee\u5f55\u548c\u53ef\u5199\u5c42\u3002<\/p>\n<p>\u4eceKubernetes 1.15\u5f00\u59cb\uff0c\u96c6\u7fa4\u7ba1\u7406\u5458\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u9879\u76ee\u914d\u989d\u6765\u7ba1\u7406emptyDir\u5377\uff08\u4e0d\u5305\u62ec\u65e5\u5fd7\u76ee\u5f55\u548c\u53ef\u5199\u5c42\uff09\u3002\u9879\u76ee\u914d\u989d\u6700\u521d\u662f\u57fa\u4e8eXFS\u5b9e\u73b0\u7684\uff0c\u4f46\u6700\u8fd1\u4e5f\u5728ext4\u4e2d\u8fdb\u884c\u4e86\u79fb\u690d\u3002\u9879\u76ee\u914d\u989d\u53ef\u7528\u4e8e\u76d1\u89c6\u548c\u9650\u5236\u3002\u57281.15\u7248\u672c\u4e2d\uff0c\u4ec5\u76d1\u89c6\u529f\u80fd\u4f5c\u4e3aAlpha\u7248\u672c\u53ef\u7528\u3002<\/p>\n<p>\u914d\u989d\u6bd4\u76ee\u5f55\u626b\u63cf\u66f4\u5feb\u3001\u66f4\u51c6\u786e\u3002\u4e00\u65e6\u76ee\u5f55\u88ab\u5206\u914d\u7ed9\u9879\u76ee\uff0c\u6240\u6709\u5728\u8be5\u76ee\u5f55\u4e0b\u521b\u5efa\u7684\u6587\u4ef6\u90fd\u5c06\u5728\u8be5\u9879\u76ee\u5185\u521b\u5efa\uff0c\u5e76\u4e14\u5728\u5185\u6838\u7ea7\u522b\u8ddf\u8e2a\u8be5\u9879\u76ee\u4f7f\u7528\u7684\u6240\u6709\u6587\u4ef6\u7684\u5757\u4f7f\u7528\u60c5\u51b5\u3002\u5982\u679c\u6587\u4ef6\u88ab\u521b\u5efa\u5e76\u5220\u9664\uff0c\u4f46\u4ecd\u7136\u6709\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5728\u4f7f\u7528\uff0c\u5b83\u5c06\u7ee7\u7eed\u5360\u7528\u7a7a\u95f4\u3002\u8fd9\u4e2a\u7a7a\u95f4\u5c06\u7531\u914d\u989d\u8ddf\u8e2a\uff0c\u4f46\u4e0d\u4f1a\u5728\u76ee\u5f55\u626b\u63cf\u4e2d\u663e\u793a\u3002<\/p>\n<p>Kubernetes\u4f7f\u7528\u4ee51048576\u4e3a\u5f00\u59cb\u7684\u9879\u76eeID\u3002\u8be5ID\u5728\/etc\/projects\u548c\/etc\/projid\u4e2d\u6ce8\u518c\u548c\u4f7f\u7528\u3002\u5982\u679c\u9879\u76eeID\u8303\u56f4\u5df2\u88ab\u5176\u4ed6\u7cfb\u7edf\u4f7f\u7528\uff0c\u5219\u8fd9\u4e9b\u9879\u76ee\u7684ID\u5fc5\u987b\u5728\/etc\/projects\u548c\/etc\/projid\u4e2d\u6ce8\u518c\uff0c\u4ee5\u9632\u6b62Kubernetes\u4f7f\u7528\u5b83\u4eec\u3002<\/p>\n<p>\u4e3a\u4e86\u542f\u7528\u9879\u76ee\u914d\u989d\uff0c\u96c6\u7fa4\u7ba1\u7406\u5458\u9700\u8981\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<br \/>\n\u542f\u7528FeatureGate\u7684LocalStorageCapacityIsolationFSQuotaMonitoring\u529f\u80fd\u3002\u5728v1.15\u4e2d\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u7981\u7528\u7684\u3002<br \/>\n\u5728\u542f\u7528\u9879\u76ee\u914d\u989d\u7684\u60c5\u51b5\u4e0b\u521b\u5efaroot\u5206\u533a\uff08\u6216\u8fd0\u884c\u65f6\u5206\u533a\uff09\u3002XFS\u6587\u4ef6\u7cfb\u7edf\u5df2\u542f\u7528\uff0c\u4f46\u5bf9\u4e8eext4\uff0c\u5fc5\u987b\u6307\u5b9a\u8fdb\u884c\u6784\u5efa\u3002<br \/>\n\u5728\u542f\u7528\u9879\u76ee\u914d\u989d\u7684\u60c5\u51b5\u4e0b\u6302\u8f7droot\u5206\u533a\uff08\u6216\u8fd0\u884c\u65f6\u5206\u533a\uff09\u3002<\/p><\/blockquote>\n<p>\u636e\u770b\u8d77\u6765\u662f\u7531kubelet\u4e2d\u7684eviction-manager\u8fdb\u884c\u7684\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u8fd9\u662f\u5728https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.15.1\/pkg\/kubelet\/eviction\/eviction_manager.go#L447\u4e2d\u5b9e\u73b0\u7684\u3002<\/p>\n<h1>\u9a71\u9010\u7ba1\u7406\u8005<\/h1>\n<p>kubelet\u7684\u9a71\u9010\u7ba1\u7406\u5668\u4e0d\u4ec5\u76d1\u89c6\u77ac\u6001\u5b58\u50a8\uff0c\u8fd8\u76d1\u89c6\u8282\u70b9\u7684\u5185\u5b58\u3001\u8fdb\u7a0b\u6807\u8bc6\u53f7\u7b49\u8d44\u6e90\u60c5\u51b5\u3002\u5f53\u53ef\u7528\u8d44\u6e90\u5c11\u4e8e\u6307\u5b9a\u503c\u65f6\uff0c\u8be5\u7ec4\u4ef6\u5c06\u6267\u884c\u9a71\u9010\u64cd\u4f5c\u3002\u5bf9\u4e8e\u53ef\u538b\u7f29\u7684\u8d44\u6e90\uff0c\u5982CPU\u7b49\uff0c\u65e0\u9700\u7279\u522b\u5904\u7406\u3002\u4f46\u5bf9\u4e8e\u4e0d\u53ef\u538b\u7f29\u7684\u8d44\u6e90\uff0c\u5982\u5185\u5b58\u548c\u78c1\u76d8\uff0c\u5fc5\u987b\u901a\u8fc7\u505c\u6b62Pod\uff08\u5bb9\u5668\uff09\u6765\u56de\u6536\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528\u6b64\u7c7b\u7ec4\u4ef6\u8fdb\u884c\u9a71\u9010\u548c\u56de\u6536\u3002\u8be6\u7ec6\u4fe1\u606f\u8bf7\u53c2\u9605 https:\/\/kubernetes.io\/docs\/tasks\/administer-cluster\/out-of-resource\/\u3002<\/p>\n<p>\u8fd9\u4e2a eviction \u7684\u9608\u503c\u53ef\u4ee5\u901a\u8fc7 kubelet \u7684\u542f\u52a8\u53c2\u6570 &#8211;eviction-soft \u6216 &#8211;eviction-hard \u6765\u6307\u5b9a\u3002<br \/>\nsoft \u548c hard \u7684\u533a\u522b\u5728\u4e8e\u5728\u88ab\u9a71\u9010\u65f6\u6307\u5b9a\u7684\u5bb9\u5fcd\u65f6\u95f4\uff08grace-period\uff09\u7684\u5dee\u5f02\u3002soft \u53ef\u4ee5\u4f18\u96c5\u5730\u5173\u95ed\uff0c\u7b49\u5f85\u53d1\u9001 SIGKILL \u76f4\u5230\u8fbe\u5230 Pod \u6307\u5b9a\u7684\u503c\u6216\u8005 &#8211;eviction-max-pod-grace-period \u6307\u5b9a\u7684\u65f6\u95f4\uff0c\u800c hard \u9a6c\u4e0a\u53d1\u9001 SIGKILL\uff0c\u56e0\u6b64\u65e0\u6cd5\u8fdb\u884c\u4f18\u96c5\u7684\u5173\u95ed\u3002&#8211;eviction-soft \u6ca1\u6709\u9ed8\u8ba4\u503c\uff0c\u56e0\u6b64\u5728\u8d44\u6e90\u4e0d\u8db3\u7684\u60c5\u51b5\u4e0b\uff0c\u6700\u597d\u8bbe\u7f6e\u4e00\u4e2a\u503c\u4ee5\u4fbf\u8fdb\u884c\u4f18\u96c5\u5173\u95ed\u3002<\/p>\n<h2>eviction-manager \u7684\u8fd0\u884c\u673a\u5236\u662f\u600e\u6837\u7684\u3002<\/h2>\n<p>\u901a\u8fc7\u5b9a\u671f\u6267\u884c https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.15.1\/pkg\/kubelet\/eviction\/eviction_manager.go#L223 \u4e2d\u7684\u65b9\u6cd5\uff0c\u57fa\u672c\u4e0a\u4f1a\u901a\u8fc7\u56de\u6536\u8d44\u6e90\u8fdb\u884c\u9a71\u9010\u3002<br \/>\n\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u4f1a\u68c0\u67e5\u8282\u70b9\u7684\u8d44\u6e90\u60c5\u51b5\uff0c\u5e76\u5728 https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.15.1\/pkg\/kubelet\/eviction\/eviction_manager.go#L265 \u4e2d\u8ba1\u7b97\u8d85\u8fc7\u9608\u503c\u7684\u8d44\u6e90\u3002<br \/>\n\u5982\u679c\u5728\u8fd9\u4e9b\u8d44\u6e90\u4e2d\u6709\u53ef\u4ee5\u901a\u8fc7 GC \u6216\u5176\u4ed6\u65b9\u5f0f\u56de\u6536\u7684\u8d44\u6e90\uff0c\u5219\u5148\u8fd0\u884c GC\u3002\u5982\u679c\u4ecd\u7136\u65e0\u6cd5\u56de\u6536\u6216\u8005 GC \u65e0\u6cd5\u89e3\u51b3\u95ee\u9898\uff0c\u5219\u8f6c\u5411\u9a71\u9010\u8fc7\u7a0b\u3002<br \/>\n\u7136\u540e\u83b7\u53d6\u6d3b\u52a8\u7684 pods\uff0c\u5e76\u5728 https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.15.1\/pkg\/kubelet\/eviction\/eviction_manager.go#L360 \u4e2d\u4e3a\u5e94\u8be5\u88ab\u9a71\u9010\u7684 Pod \u8fdb\u884c\u4f18\u5148\u7ea7\u6392\u5e8f\u3002<br \/>\n\u5185\u5b58\u662f\u901a\u8fc7 https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.15.1\/pkg\/kubelet\/eviction\/helpers.go#L670 \u8fdb\u884c\u6392\u5e8f\uff0c\u78c1\u76d8\u7565\u5fae\u590d\u6742\uff0c\u9700\u8981\u6839\u636e\u662f\u5426\u4f7f\u7528 imageFS \u7b49\u6761\u4ef6\u8fdb\u884c\u5904\u7406\uff0c\u4f46\u57fa\u672c\u4e0a\u662f\u6309\u7167\u4ee5\u4e0b\u987a\u5e8f\u8fdb\u884c\u6392\u5e8f\u4ee5\u786e\u5b9a\u4f18\u5148\u7ea7\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">requests \u306e\u5024\u3092\u8d85\u3048\u3066\u3044\u308b\u304b(\u8d85\u3048\u3066\u3044\u306a\u3044\u5834\u5408\u306f evict \u306e\u5bfe\u8c61\u5916)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Pod priority<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u305d\u306e\u30ea\u30bd\u30fc\u30b9\u306e\u5229\u7528\u91cf<\/ul>\n<p>\u5728\u6b64\u4e4b\u540e\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u7b97\u51fa\u7684 activePods \u503c\u5728 https:\/\/github.com\/kubernetes\/kubernetes\/blob\/v1.15.1\/pkg\/kubelet\/eviction\/eviction_manager.go#L37 \u4e2d\u8fdb\u884c\u9010\u51fa\u64cd\u4f5c\u3002\u4e00\u65e6\u8fdb\u884c\u4e86\u9010\u51fa\u64cd\u4f5c\u5e76\u8fd4\u56de\uff0c\u88ab\u9010\u51fa\u7684 Pod 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